all: version 0.35.0

builder: show files in size report table
Show which files cause a binary size increase. This makes it easier to see where the size is going: for example, this makes it easy to see how much the GC contributes to code size compared to other runtime parts.
2026-07-26 14:48:40 +00:00 · 2024-12-20 12:09:22 +01:00 · 2024-12-19 15:08:37 +01:00 · 2024-12-19 15:08:37 +01:00 · 2024-12-19 13:44:11 +01:00 · 2024-12-19 12:54:25 +01:00
463 changed files with 14845 additions and 4999 deletions
@@ -90,6 +90,8 @@ commands:
              name: Check Go code formatting
              command: make fmt-check lint
      - run: make gen-device -j4
+      # TODO: change this to -skip='TestErrors|TestWasm' with Go 1.20
+      - run: go test -tags=llvm<<parameters.llvm>> -short -run='TestBuild|TestTest|TestGetList|TestTraceback'
      - run: make smoketest XTENSA=0
      - save_cache:
          key: go-cache-v4-{{ checksum "go.mod" }}-{{ .Environment.CIRCLE_BUILD_NUM }}
@@ -104,10 +106,12 @@ jobs:
    steps:
      - test-linux:
          llvm: "15"
+          # "make lint" fails before go 1.21 because internal/tools/go.mod specifies packages that require go 1.21
+          fmt-check: false
    resource_class: large
-  test-llvm18-go122:
+  test-llvm18-go123:
    docker:
-      - image: golang:1.22-bullseye
+      - image: golang:1.23-bullseye
    steps:
      - test-linux:
          llvm: "18"
@@ -120,4 +124,4 @@ workflows:
      # least the smoke tests still pass.
      - test-llvm15-go119
      # This tests LLVM 18 support when linking against system libraries.
-      - test-llvm18-go122
+      - test-llvm18-go123
@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+open_collective: tinygo
@@ -16,28 +16,30 @@ jobs:
    name: build-macos
    strategy:
      matrix:
-        # macos-12: amd64 (oldest supported version as of 05-02-2024)
+        # macos-13: amd64 (oldest supported version as of 18-10-2024)
        # macos-14: arm64 (oldest arm64 version)
-        os: [macos-12, macos-14]
+        os: [macos-13, macos-14]
        include:
-          - os: macos-12
+          - os: macos-13
            goarch: amd64
          - os: macos-14
            goarch: arm64
    runs-on: ${{ matrix.os }}
    steps:
      - name: Install Dependencies
-        shell: bash
        run: |
          HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu binaryen
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: true
+      - name: Extract TinyGo version
+        id: version
+        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
@@ -72,7 +74,6 @@ jobs:
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        shell: bash
        run: |
          # fetch LLVM source
          rm -rf llvm-project
@@ -100,15 +101,13 @@ jobs:
      - name: make gen-device
        run: make -j3 gen-device
      - name: Test TinyGo
-        shell: bash
        run: make test GOTESTFLAGS="-short"
      - name: Build TinyGo release tarball
        run: make release -j3
      - name: Test stdlib packages
        run: make tinygo-test
      - name: Make release artifact
-        shell: bash
-        run: cp -p build/release.tar.gz build/tinygo.darwin-${{ matrix.goarch }}.tar.gz
+        run: cp -p build/release.tar.gz build/tinygo${{ steps.version.outputs.version }}.darwin-${{ matrix.goarch }}.tar.gz
      - name: Publish release artifact
        # Note: this release artifact is double-zipped, see:
        # https://github.com/actions/upload-artifact/issues/39
@@ -118,10 +117,9 @@ jobs:
        # We're doing the former here, to keep artifact uploads fast.
        uses: actions/upload-artifact@v4
        with:
-          name: darwin-${{ matrix.goarch }}-double-zipped
-          path: build/tinygo.darwin-${{ matrix.goarch }}.tar.gz
+          name: darwin-${{ matrix.goarch }}-double-zipped-${{ steps.version.outputs.version }}
+          path: build/tinygo${{ steps.version.outputs.version }}.darwin-${{ matrix.goarch }}.tar.gz
      - name: Smoke tests
-        shell: bash
        run: make smoketest TINYGO=$(PWD)/build/tinygo
  test-macos-homebrew:
    name: homebrew-install
@@ -145,7 +143,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Build TinyGo (LLVM ${{ matrix.version }})
        run: go install -tags=llvm${{ matrix.version }}
@@ -18,7 +18,9 @@ jobs:
    # statically linked binary.
    runs-on: ubuntu-latest
    container:
-      image: golang:1.22-alpine
+      image: golang:1.23-alpine
+    outputs:
+      version: ${{ steps.version.outputs.version }}
    steps:
      - name: Install apk dependencies
        # tar: needed for actions/cache@v4
@@ -32,6 +34,9 @@ jobs:
        uses: actions/checkout@v4
        with:
          submodules: true
+      - name: Extract TinyGo version
+        id: version
+        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Cache Go
        uses: actions/cache@v4
        with:
@@ -115,18 +120,20 @@ jobs:
          gem install --no-document fpm
      - name: Run linter
        run: make lint
+      - name: Run spellcheck
+        run: make spell
      - name: Build TinyGo release
        run: |
          make release deb -j3 STATIC=1
-          cp -p build/release.tar.gz /tmp/tinygo.linux-amd64.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_amd64.deb
+          cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+          cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
      - name: Publish release artifact
        uses: actions/upload-artifact@v4
        with:
-          name: linux-amd64-double-zipped
+          name: linux-amd64-double-zipped-${{ steps.version.outputs.version }}
          path: |
-            /tmp/tinygo.linux-amd64.tar.gz
-            /tmp/tinygo_amd64.deb
+            /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+            /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
  test-linux-build:
    # Test the binaries built in the build-linux job by running the smoke tests.
    runs-on: ubuntu-latest
@@ -139,7 +146,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Install wasmtime
        uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -150,11 +157,11 @@ jobs:
      - name: Download release artifact
        uses: actions/download-artifact@v4
        with:
-          name: linux-amd64-double-zipped
+          name: linux-amd64-double-zipped-${{ needs.build-linux.outputs.version }}
      - name: Extract release tarball
        run: |
          mkdir -p ~/lib
-          tar -C ~/lib -xf tinygo.linux-amd64.tar.gz
+          tar -C ~/lib -xf tinygo${{ needs.build-linux.outputs.version }}.linux-amd64.tar.gz
          ln -s ~/lib/tinygo/bin/tinygo ~/go/bin/tinygo
      - run: make tinygo-test-wasip1-fast
      - run: make tinygo-test-wasip2-fast
@@ -162,7 +169,7 @@ jobs:
  assert-test-linux:
    # Run all tests that can run on Linux, with LLVM assertions enabled to catch
    # potential bugs.
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4
@@ -182,7 +189,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Install Node.js
        uses: actions/setup-node@v4
@@ -295,6 +302,9 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v4
+      - name: Get TinyGo version
+        id: version
+        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Install apt dependencies
        run: |
          sudo apt-get update
@@ -305,7 +315,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
@@ -379,11 +389,11 @@ jobs:
      - name: Download amd64 release
        uses: actions/download-artifact@v4
        with:
-          name: linux-amd64-double-zipped
+          name: linux-amd64-double-zipped-${{ needs.build-linux.outputs.version }}
      - name: Extract amd64 release
        run: |
          mkdir -p build/release
-          tar -xf tinygo.linux-amd64.tar.gz -C build/release tinygo
+          tar -xf tinygo${{ needs.build-linux.outputs.version }}.linux-amd64.tar.gz -C build/release tinygo
      - name: Modify release
        run: |
          cp -p build/tinygo   build/release/tinygo/bin
@@ -391,12 +401,12 @@ jobs:
      - name: Create ${{ matrix.goarch }} release
        run: |
          make release deb RELEASEONLY=1 DEB_ARCH=${{ matrix.libc }}
-          cp -p build/release.tar.gz /tmp/tinygo.linux-${{ matrix.goarch }}.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_${{ matrix.libc }}.deb
+          cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
+          cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_${{ matrix.libc }}.deb
      - name: Publish release artifact
        uses: actions/upload-artifact@v4
        with:
-          name: linux-${{ matrix.goarch }}-double-zipped
+          name: linux-${{ matrix.goarch }}-double-zipped-${{ steps.version.outputs.version }}
          path: |
-            /tmp/tinygo.linux-${{ matrix.goarch }}.tar.gz
-            /tmp/tinygo_${{ matrix.libc }}.deb
+            /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
+            /tmp/tinygo_${{ steps.version.outputs.version }}_${{ matrix.libc }}.deb
@@ -15,6 +15,11 @@ jobs:
  nix-test:
    runs-on: ubuntu-latest
    steps:
+      - name: Uninstall system LLVM
+        # Hack to work around issue where we still include system headers for
+        # some reason.
+        # See: https://github.com/tinygo-org/tinygo/pull/4516#issuecomment-2416363668
+        run: sudo apt-get remove llvm-18
      - name: Checkout
        uses: actions/checkout@v4
      - name: Pull musl
@@ -2,7 +2,7 @@
 # still works after checking out the dev branch (that is, when going from LLVM
 # 16 to LLVM 17 for example, both Clang 16 and Clang 17 are installed).

-echo 'deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main' | sudo tee /etc/apt/sources.list.d/llvm.list
+echo 'deb https://apt.llvm.org/noble/ llvm-toolchain-noble-18 main' | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update
 sudo apt-get install --no-install-recommends -y \
@@ -9,6 +9,8 @@ concurrency:

 jobs:
  sizediff:
+    # Note: when updating the Ubuntu version, also update the Ubuntu version in
+    # sizediff-install-pkgs.sh
    runs-on: ubuntu-24.04
    permissions:
      pull-requests: write
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Extract the version string from the source code, to be stored in a variable.
+grep 'const version' goenv/version.go | sed 's/^const version = "\(.*\)"$/version=\1/g'
@@ -14,6 +14,8 @@ concurrency:
 jobs:
  build-windows:
    runs-on: windows-2022
+    outputs:
+      version: ${{ steps.version.outputs.version }}
    steps:
      - name: Configure pagefile
        uses: al-cheb/configure-pagefile-action@v1.4
@@ -32,10 +34,14 @@ jobs:
        uses: actions/checkout@v4
        with:
          submodules: true
+      - name: Extract TinyGo version
+        id: version
+        shell: bash
+        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Restore cached LLVM source
        uses: actions/cache/restore@v4
@@ -94,6 +100,13 @@ jobs:
      - name: Build wasi-libc
        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
        run: make wasi-libc
+      - name: Cache Go cache
+        uses: actions/cache@v4
+        with:
+          key: go-cache-windows-v1-${{ hashFiles('go.mod') }}
+          path: |
+            C:/Users/runneradmin/AppData/Local/go-build
+            C:/Users/runneradmin/go/pkg/mod
      - name: Install wasmtime
        run: |
          scoop install wasmtime@14.0.4
@@ -108,7 +121,7 @@ jobs:
      - name: Make release artifact
        shell: bash
        working-directory: build/release
-        run: 7z -tzip a release.zip tinygo
+        run: 7z -tzip a tinygo${{ steps.version.outputs.version }}.windows-amd64.zip tinygo
      - name: Publish release artifact
        # Note: this release artifact is double-zipped, see:
        # https://github.com/actions/upload-artifact/issues/39
@@ -118,8 +131,8 @@ jobs:
        # We're doing the former here, to keep artifact uploads fast.
        uses: actions/upload-artifact@v4
        with:
-          name: windows-amd64-double-zipped
-          path: build/release/release.zip
+          name: windows-amd64-double-zipped-${{ steps.version.outputs.version }}
+          path: build/release/tinygo${{ steps.version.outputs.version }}.windows-amd64.zip

  smoke-test-windows:
    runs-on: windows-2022
@@ -143,17 +156,17 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
        with:
-          name: windows-amd64-double-zipped
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
          path: build/
      - name: Unzip TinyGo build
        shell: bash
        working-directory: build
-        run: 7z x release.zip -r
+        run: 7z x tinygo*.windows-amd64.zip -r
      - name: Smoke tests
        shell: bash
        run: make smoketest TINYGO=$(PWD)/build/tinygo/bin/tinygo
@@ -173,17 +186,17 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
        with:
-          name: windows-amd64-double-zipped
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
          path: build/
      - name: Unzip TinyGo build
        shell: bash
        working-directory: build
-        run: 7z x release.zip -r
+        run: 7z x tinygo*.windows-amd64.zip -r
      - name: Test stdlib packages
        run: make tinygo-test TINYGO=$(PWD)/build/tinygo/bin/tinygo

@@ -209,16 +222,16 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.22'
+          go-version: '1.23'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
        with:
-          name: windows-amd64-double-zipped
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
          path: build/
      - name: Unzip TinyGo build
        shell: bash
        working-directory: build
-        run: 7z x release.zip -r
+        run: 7z x tinygo*.windows-amd64.zip -r
      - name: Test stdlib packages on wasip1
        run: make tinygo-test-wasip1-fast TINYGO=$(PWD)/build/tinygo/bin/tinygo
@@ -20,6 +20,8 @@ src/device/stm32/*.go
 src/device/stm32/*.s
 src/device/kendryte/*.go
 src/device/kendryte/*.s
+src/device/renesas/*.go
+src/device/renesas/*.s
 src/device/rp/*.go
 src/device/rp/*.s
 ./vendor
@@ -35,5 +37,9 @@ test.exe
 test.gba
 test.hex
 test.nro
+test.uf2
 test.wasm
 wasm.wasm
+
+*.uf2
+*.elf
@@ -32,9 +32,6 @@
 [submodule "lib/macos-minimal-sdk"]
 	path = lib/macos-minimal-sdk
 	url = https://github.com/aykevl/macos-minimal-sdk.git
-[submodule "lib/renesas-svd"]
-	path = lib/renesas-svd
-	url = https://github.com/tinygo-org/renesas-svd.git
 [submodule "src/net"]
 	path = src/net
 	url = https://github.com/tinygo-org/net.git
@@ -28,6 +28,21 @@ build tools to be built. Go is of course necessary to build TinyGo itself.
 The rest of this guide assumes you're running Linux, but it should be equivalent
 on a different system like Mac.

+## Using GNU Make
+
+The static build of TinyGo is driven by GNUmakefile, which provides a help target for quick reference:
+
+    % make help
+    clean                           Remove build directory
+    fmt                             Reformat source
+    fmt-check                       Warn if any source needs reformatting
+    gen-device                      Generate microcontroller-specific sources
+    llvm-source                     Get LLVM sources
+    llvm-build                      Build LLVM
+    tinygo                          Build the TinyGo compiler
+    lint                            Lint source tree
+    spell                           Spellcheck source tree
+
 ## Download the source

 The first step is to download the TinyGo sources (use `--recursive` if you clone
@@ -1,3 +1,181 @@
+0.35.0
+---
+* **general**
+  - update cmsis-svd library
+  - use default UART settings in the echo example
+  - `goenv`: also show git hash with custom build of TinyGo
+  - `goenv`: support parsing development versions of Go
+  - `main`: parse extldflags early so we can report the error message
+* **compiler**
+  - `builder`: whitelist temporary directory env var for Clang invocation to fix Windows bug
+  - `builder`: fix cache paths in `-size=full` output
+  - `builder`: work around incorrectly escaped DWARF paths on Windows (Clang bug)
+  - `builder`: fix wasi-libc path names on Windows with `-size=full`
+  - `builder`: write HTML size report
+  - `cgo`: support C identifiers only referred to from within macros
+  - `cgo`: support function-like macros
+  - `cgo`: support errno value as second return parameter
+  - `cgo`: add support for `#cgo noescape` lines
+  - `compiler`: fix bug in interrupt lowering
+  - `compiler`: allow panic directly in `defer`
+  - `compiler`: fix wasmimport -> wasmexport in error message
+  - `compiler`: support `//go:noescape` pragma
+  - `compiler`: report error instead of crashing when instantiating a generic function without body
+  - `interp`: align created globals
+* **standard library**
+  - `machine`: modify i2s interface/implementation to better match specification
+  - `os`: implement `StartProcess`
+  - `reflect`: add `Value.Clear`
+  - `reflect`: add interface support to `NumMethods`
+  - `reflect`: fix `AssignableTo` for named + non-named types
+  - `reflect`: implement `CanConvert`
+  - `reflect`: handle more cases in `Convert`
+  - `reflect`: fix Copy of non-pointer array with size > 64bits
+  - `runtime`: don't call sleepTicks with a negative duration
+  - `runtime`: optimize GC scanning (findHead)
+  - `runtime`: move constants into shared package
+  - `runtime`: add `runtime.fcntl` function for internal/syscall/unix
+  - `runtime`: heapptr only needs to be initialized once
+  - `runtime`: refactor scheduler (this fixes a few bugs with `-scheduler=none`)
+  - `runtime`: rewrite channel implementation to be smaller and more flexible
+  - `runtime`: use `SA_RESTART` when registering a signal for os/signal
+  - `runtime`: implement race-free signals using futexes
+  - `runtime`: run deferred functions in `Goexit`
+  - `runtime`: remove `Cond` which seems to be unused
+  - `runtime`: properly handle unix read on directory
+  - `runtime/trace`: stub all public methods
+  - `sync`: don't use volatile in `Mutex`
+  - `sync`: implement `WaitGroup` using a (pseudo)futex
+  - `sync`: make `Cond` parallelism-safe
+  - `syscall`: use wasi-libc tables for wasm/js target
+* **targets**
+  - `mips`: fix a bug when scanning the stack
+  - `nintendoswitch`: get this target to compile again
+  - `rp2350`: add support for the new RP2350
+  - `rp2040/rp2350` : make I2C implementation shared for rp2040/rp2350
+  - `rp2040/rp2350` : make SPI implementation shared for rp2040/rp2350
+  - `rp2040/rp2350` : make RNG implementation shared for rp2040/rp2350
+  - `wasm`: revise and simplify wasmtime argument handling
+  - `wasm`: support `//go:wasmexport` functions after a call to `time.Sleep`
+  - `wasm`: correctly return from run() in wasm_exec.js
+  - `wasm`: call process.exit() when go.run() returns
+  - `windows`: don't return, exit via exit(0) instead to flush stdout buffer
+* **boards**
+  - add support for the Tillitis TKey
+  - add support for the Raspberry Pi Pico2 (based on the RP2040)
+  - add support for Pimoroni Tiny2350
+
+
+0.34.0
+---
+* **general**
+  - fix `GOOS=wasip1` for `tinygo test`
+  - add `-C DIR` flag
+  - add initial documentation for project governance
+  - add `-ldflags='-extldflags=...'` support
+  - improve usage message with `tinygo help` and when passing invalid parameters
+* **compiler**
+  - `builder`: remove environment variables when invoking Clang, to avoid the environment changing the behavior
+  - `builder`: check for the Go toolchain version used to compile TinyGo
+  - `cgo`: add `C.CBytes` implementation
+  - `compiler`: fix passing weirdly-padded structs as parameters to new goroutines
+  - `compiler`: support pragmas on generic functions
+  - `compiler`: do not let the slice buffer escape when casting a `[]byte` or `[]rune` to a string, to help escape analysis
+  - `compiler`: conform to the latest iteration of the wasm types proposal
+  - `loader`: don't panic when main package is not named 'main'
+  - `loader`: make sure we always return type checker errors even without type errors
+  - `transform`: optimize range over `[]byte(string)`
+* **standard library**
+  - `crypto/x509`: add package stub to build crypto/x509 on macOS
+  - `machine/usb/adc/midi`: fix `PitchBend`
+  - `os`: add `Truncate` stub for baremetal
+  - `os`: add stubs for `os.File` deadlines
+  - `os`: add internal `net.newUnixFile` for the net package
+  - `runtime`: stub runtime_{Before,After}Exec for linkage
+  - `runtime`: randomize map accesses
+  - `runtime`: support `maps.Clone`
+  - `runtime`: add more fields to `MemStats`
+  - `runtime`: implement newcoro, coroswitch to support package iter
+  - `runtime`: disallow defer in interrupts
+  - `runtime`: add support for os/signal on Linux and MacOS
+  - `runtime`: add gc layout info for some basic types to help the precise GC
+  - `runtime`: bump GC mark stack size to avoid excessive heap rescans
+* **targets**
+  - `darwin`: use Go standard library syscall package instead of a custom one
+  - `fe310`: support GPIO `PinInput`
+  - `mips`: fix compiler crash with GOMIPS=softfloat and defer
+  - `mips`: add big-endian (GOARCH=mips) support
+  - `mips`: use MIPS32 (instead of MIPS32R2) as the instruction set for wider compatibility
+  - `wasi`: add relative and absolute --dir options to wasmtime args
+  - `wasip2`: add wasmtime -S args to support network interfaces
+  - `wasm`: add `//go:wasmexport` support (for all WebAssembly targets)
+  - `wasm`: use precise instead of conservative GC for WebAssembly (including WASI)
+  - `wasm-unknown`: add bulk memory flags since basically every runtime has it now
+* **boards**
+  - add RAKwireless RAK4631
+  - add WaveShare ESP-C3-32S-Kit
+
+
+0.33.0
+---
+
+* **general**
+  - use latest version of x/tools
+  - add chromeos 9p support for flashing
+  - sort compiler error messages by source position in a package
+  - don't include prebuilt libraries in the release to simplify packaging and reduce the release tarball size
+  - show runtime panic addresses for `tinygo run`
+  - support Go 1.23 (including all new language features)
+  - `test`: support GOOS/GOARCH pairs in the `-target` flag
+  - `test`: remove message after test binary built
+* **compiler**
+  - remove unused registers for x86_64 linux syscalls
+  - remove old atomics workaround for AVR (not necessary in modern LLVM versions)
+  - support `golang.org/x/sys/unix` syscalls
+  - `builder`: remove workaround for generics race condition
+  - `builder`: add package ID to compiler and optimization error messages
+  - `builder`: show better error messages for some common linker errors
+  - `cgo`: support preprocessor macros passed on the command line
+  - `cgo`: use absolute paths for error messages
+  - `cgo`: add support for printf
+  - `loader`: handle `go list` errors inside TinyGo (for better error messages)
+  - `transform`: fix incorrect alignment of heap-to-stack transform
+  - `transform`: use thinlto-pre-link passes (instead of the full pipeline) to speed up compilation speed slightly
+* **standard library**
+  - `crypto/tls`: add CipherSuiteName and some extra fields to ConnectionSTate
+  - `internal/abi`: implement initial version of this package
+  - `machine`: use new `internal/binary` package
+  - `machine`: rewrite Reply() to fix sending long replies in I2C Target Mode
+  - `machine/usb/descriptor`: Reset joystick physical
+  - `machine/usb/descriptor`: Drop second joystick hat
+  - `machine/usb/descriptor`: Add more HID... functions
+  - `machine/usb/descriptor`: Fix encoding of values
+  - `machine/usb/hid/joystick`: Allow more hat switches
+  - `os`: add `Chown`, `Truncate`
+  - `os/user`: use stdlib version of this package
+  - `reflect`: return correct name for the `unsafe.Pointer` type
+  - `reflect`: implement `Type.Overflow*` functions
+  - `runtime`: implement dummy `getAuxv` to satisfy golang.org/x/sys/
+  - `runtime`: don't zero out new allocations for `-gc=leaking` when they are already zeroed
+  - `runtime`: simplify slice growing/appending code
+  - `runtime`: print a message when a fatal signal like SIGSEGV happens
+  - `runtime/debug`: add `GoVersion` to `debug.BuildInfo`
+  - `sync`: add `Map.Clear()`
+  - `sync/atomic`: add And* and Or* compiler intrinsics needed for Go 1.23
+  - `syscall`: add `Fork` and `Execve`
+  - `syscall`: add all MacOS errno values
+  - `testing`: stub out `T.Deadline`
+  - `unique`: implement custom (naive) version of the unique package
+* **targets**
+  - `arm`: support `GOARM=*,softfloat` (softfloat support for ARM v5, v6, and v7)
+  - `mips`: add linux/mipsle (and experimental linux/mips) support
+  - `mips`: add `GOMIPS=softfloat` support
+  - `wasip2`: add WASI preview 2 support
+  - `wasm/js`: add `node:` prefix in `require()` call of wasm_exec.js
+  - `wasm-unknown`: make sure the `os` package can be imported
+  - `wasm-unknown`: remove import-memory flag
+
+
 0.32.0
 ---

@@ -18,7 +196,7 @@
  - `builder`: keep un-wasm-opt'd .wasm if -work was passed
  - `builder`: make sure wasm-opt command line is printed if asked
  - `cgo`: implement shift operations in preprocessor macros
-  - `interp`: checking for methodset existance
+  - `interp`: checking for methodset existence

 * **standard library**
  - `machine`: add `__tinygo_spi_tx` function to simulator
@@ -217,7 +395,7 @@
  - `reflect`: add SetZero
  - `reflect`: fix iterating over maps with interface{} keys
  - `reflect`: implement Value.Grow
-  - `reflect`: remove unecessary heap allocations
+  - `reflect`: remove unnecessary heap allocations
  - `reflect`: use .key() instead of a type assert
  - `sync`: add implementation from upstream Go for OnceFunc, OnceValue, and OnceValues
 * **targets**
@@ -1896,7 +2074,7 @@
  - allow packages like github.com/tinygo-org/tinygo/src/\* by aliasing it
  - remove `//go:volatile` support  
    It has been replaced with the runtime/volatile package.
-  - allow poiners in map keys
+  - allow pointers in map keys
  - support non-constant syscall numbers
  - implement non-blocking selects
  - add support for the `-tags` flag
@@ -1,5 +1,5 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.22 AS tinygo-llvm
+FROM golang:1.23 AS tinygo-llvm

 RUN apt-get update && \
    apt-get install -y apt-utils make cmake clang-15 ninja-build && \
@@ -33,7 +33,7 @@ RUN cd /tinygo/ && \

 # tinygo-compiler copies the compiler build over to a base Go container (without
 # all the build tools etc).
-FROM golang:1.22 AS tinygo-compiler
+FROM golang:1.23 AS tinygo-compiler

 # Copy tinygo build.
 COPY --from=tinygo-compiler-build /tinygo/build/release/tinygo /tinygo
@@ -175,17 +175,17 @@ ifneq ("$(wildcard $(LLVM_BUILDDIR)/bin/llvm-config*)","")
    CGO_LDFLAGS+=-L$(abspath $(LLVM_BUILDDIR)/lib) -lclang $(CLANG_LIBS) $(LLD_LIBS) $(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --ldflags --libs --system-libs $(LLVM_COMPONENTS)) -lstdc++ $(CGO_LDFLAGS_EXTRA)
 endif

-clean:
+clean: ## Remove build directory
 	@rm -rf build

 FMT_PATHS = ./*.go builder cgo/*.go compiler interp loader src transform
-fmt:
+fmt: ## Reformat source
 	@gofmt -l -w $(FMT_PATHS)
-fmt-check:
+fmt-check: ## Warn if any source needs reformatting
 	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1


-gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp
+gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp gen-device-renesas ## Generate microcontroller-specific sources
 ifneq ($(STM32), 0)
 gen-device: gen-device-stm32
 endif
@@ -234,21 +234,19 @@ gen-device-rp: build/gen-device-svd
 	GO111MODULE=off $(GO) fmt ./src/device/rp

 gen-device-renesas: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/tinygo-org/renesas-svd lib/renesas-svd/ src/device/renesas/
+	./build/gen-device-svd -source=https://github.com/cmsis-svd/cmsis-svd-data/tree/master/data/Renesas lib/cmsis-svd/data/Renesas/ src/device/renesas/
 	GO111MODULE=off $(GO) fmt ./src/device/renesas

-# Get LLVM sources.
 $(LLVM_PROJECTDIR)/llvm:
 	git clone -b tinygo_xtensa_release_18.1.2 --depth=1 https://github.com/tinygo-org/llvm-project $(LLVM_PROJECTDIR)
-llvm-source: $(LLVM_PROJECTDIR)/llvm
+llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources

 # Configure LLVM.
 TINYGO_SOURCE_DIR=$(shell pwd)
 $(LLVM_BUILDDIR)/build.ninja:
 	mkdir -p $(LLVM_BUILDDIR) && cd $(LLVM_BUILDDIR) && cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;AVR;Mips;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_ZSTD=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)

-# Build LLVM.
-$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja
+$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja ## Build LLVM
 	cd $(LLVM_BUILDDIR) && ninja $(NINJA_BUILD_TARGETS)

 ifneq ($(USE_SYSTEM_BINARYEN),1)
@@ -269,7 +267,7 @@ lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
 	cd lib/wasi-libc && $(MAKE) -j4 EXTRA_CFLAGS="-O2 -g -DNDEBUG -mnontrapping-fptoint -msign-ext" MALLOC_IMPL=none CC="$(CLANG)" AR=$(LLVM_AR) NM=$(LLVM_NM)

 # Generate WASI syscall bindings
-WASM_TOOLS_MODULE=github.com/ydnar/wasm-tools-go
+WASM_TOOLS_MODULE=github.com/bytecodealliance/wasm-tools-go
 .PHONY: wasi-syscall
 wasi-syscall: wasi-cm
 	go run -modfile ./internal/wasm-tools/go.mod $(WASM_TOOLS_MODULE)/cmd/wit-bindgen-go generate --versioned -o ./src/internal -p internal --cm internal/cm ./lib/wasi-cli/wit
@@ -291,12 +289,11 @@ ifeq (, $(shell which node))
 endif
 	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 18+ to run tests."; exit 1; fi

-# Build the Go compiler.
-tinygo:
+tinygo: ## Build the TinyGo compiler
 	@if [ ! -f "$(LLVM_BUILDDIR)/bin/llvm-config" ]; then echo "Fetch and build LLVM first by running:"; echo "  $(MAKE) llvm-source"; echo "  $(MAKE) $(LLVM_BUILDDIR)"; exit 1; fi
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" -ldflags="-X github.com/tinygo-org/tinygo/goenv.GitSha1=`git rev-parse --short HEAD`" .
+	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" .
 test: wasi-libc check-nodejs-version
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=20m -buildmode exe -tags "byollvm osusergo" $(GOTESTPKGS)
+	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags "byollvm osusergo" $(GOTESTPKGS)

 # Standard library packages that pass tests on darwin, linux, wasi, and windows, but take over a minute in wasi
 TEST_PACKAGES_SLOW = \
@@ -306,26 +303,34 @@ TEST_PACKAGES_SLOW = \

 # Standard library packages that pass tests quickly on darwin, linux, wasi, and windows
 TEST_PACKAGES_FAST = \
+	cmp \
 	compress/lzw \
 	compress/zlib \
 	container/heap \
 	container/list \
 	container/ring \
 	crypto/des \
+	crypto/ecdsa \
+	crypto/elliptic \
 	crypto/md5 \
 	crypto/rc4 \
 	crypto/sha1 \
 	crypto/sha256 \
 	crypto/sha512 \
+	database/sql/driver \
 	debug/macho \
 	embed/internal/embedtest \
 	encoding \
 	encoding/ascii85 \
+	encoding/asn1 \
 	encoding/base32 \
 	encoding/base64 \
 	encoding/csv \
 	encoding/hex \
+	go/ast \
+	go/format \
 	go/scanner \
+	go/version \
 	hash \
 	hash/adler32 \
 	hash/crc64 \
@@ -347,6 +352,7 @@ TEST_PACKAGES_FAST = \
 	unicode \
 	unicode/utf16 \
 	unicode/utf8 \
+	unique \
 	$(nil)

 # Assume this will go away before Go2, so only check minor version.
@@ -359,30 +365,41 @@ endif
 # archive/zip requires os.ReadAt, which is not yet supported on windows
 # bytes requires mmap
 # compress/flate appears to hang on wasi
+# crypto/aes fails on wasi, needs panic()/recover()
 # crypto/hmac fails on wasi, it exits with a "slice out of range" panic
 # debug/plan9obj requires os.ReadAt, which is not yet supported on windows
-# image requires recover(), which is not  yet supported on wasi
+# image requires recover(), which is not yet supported on wasi
 # io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
+# mime: fail on wasi; neds panic()/recover()
+# mime/multipart: needs wasip1 syscall.FDFLAG_NONBLOCK
 # mime/quotedprintable requires syscall.Faccessat
+# net/mail: needs wasip1  syscall.FDFLAG_NONBLOCK
+# net/ntextproto: needs wasip1 syscall.FDFLAG_NONBLOCK
+# regexp/syntax: fails on wasip1; needs panic()/recover()
 # strconv requires recover() which is not yet supported on wasi
-# text/tabwriter requries recover(), which is not  yet supported on wasi
+# text/tabwriter requires recover(), which is not yet supported on wasi
 # text/template/parse requires recover(), which is not yet supported on wasi
 # testing/fstest requires os.ReadDir, which is not yet supported on windows or wasi

 # Additional standard library packages that pass tests on individual platforms
 TEST_PACKAGES_LINUX := \
 	archive/zip \
-	bytes \
 	compress/flate \
+	crypto/aes \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
 	image \
 	io/ioutil \
+	mime \
+	mime/multipart \
 	mime/quotedprintable \
 	net \
+	net/mail \
+	net/textproto \
+	os/user \
+	regexp/syntax \
 	strconv \
-	testing/fstest \
 	text/tabwriter \
 	text/template/parse

@@ -391,6 +408,7 @@ TEST_PACKAGES_DARWIN := $(TEST_PACKAGES_LINUX)
 TEST_PACKAGES_WINDOWS := \
 	compress/flate \
 	crypto/hmac \
+	os/user \
 	strconv \
 	text/template/parse \
 	$(nil)
@@ -485,8 +503,17 @@ tinygo-baremetal:
 	# regression test for #2666: e.g. encoding/hex must pass on baremetal
 	$(TINYGO) test -target cortex-m-qemu encoding/hex

+.PHONY: testchdir
+testchdir:
+	# test 'build' command with{,out} -C argument
+	$(TINYGO) build -C tests/testing/chdir chdir.go && rm tests/testing/chdir/chdir
+	$(TINYGO) build ./tests/testing/chdir/chdir.go && rm chdir
+	# test 'run' command with{,out} -C argument
+	EXPECT_DIR=$(PWD)/tests/testing/chdir $(TINYGO) run -C tests/testing/chdir chdir.go
+	EXPECT_DIR=$(PWD) $(TINYGO) run ./tests/testing/chdir/chdir.go
+
 .PHONY: smoketest
-smoketest:
+smoketest: testchdir
 	$(TINYGO) version
 	$(TINYGO) targets > /dev/null
 	# regression test for #2892
@@ -644,6 +671,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=xiao                examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=rak4631             examples/blinky1
+	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/dac
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pyportal            examples/dac
@@ -712,6 +741,10 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=thumby              examples/echo
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=pico2               examples/blinky1
+	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=tiny2350            examples/blinky1
+	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
 	@$(MD5SUM) test.hex
@@ -806,16 +839,26 @@ ifneq ($(XTENSA), 0)
 	$(TINYGO) build -size short -o test.bin -target mch2022             examples/machinetest
 	@$(MD5SUM) test.bin
 endif
+	$(TINYGO) build -size short -o test.bin -target=esp-c3-32s-kit      examples/blinky1
+	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=qtpy-esp32c3        examples/machinetest
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=m5stamp-c3          examples/machinetest
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c3        examples/machinetest
 	@$(MD5SUM) test.bin
+	$(TINYGO) build -size short -o test.bin -target=esp32-c3-devkit-rust-1 examples/blinky1
+	@$(MD5SUM) test.bin
+	$(TINYGO) build -size short -o test.bin -target=esp32c3-12f         examples/blinky1
+	@$(MD5SUM) test.bin
+	$(TINYGO) build -size short -o test.bin -target=makerfabs-esp32c3spi35 examples/machinetest
+	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.hex -target=hifive1b            examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=maixbit             examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=tkey                examples/blinky1
+	@$(MD5SUM) test.hex
 ifneq ($(WASM), 0)
 	$(TINYGO) build -size short -o wasm.wasm -target=wasm               examples/wasm/export
 	$(TINYGO) build -size short -o wasm.wasm -target=wasm               examples/wasm/main
@@ -830,7 +873,7 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pca10040 -serial=rtt examples/echo
 	@$(MD5SUM) test.hex
-	$(TINYGO) build             -o test.nro -target=nintendoswitch      examples/serial
+	$(TINYGO) build             -o test.nro -target=nintendoswitch      examples/echo2
 	@$(MD5SUM) test.nro
 	$(TINYGO) build -size short -o test.hex -target=pca10040 -opt=0     ./testdata/stdlib.go
 	@$(MD5SUM) test.hex
@@ -856,6 +899,7 @@ build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN
 	@mkdir -p build/release/tinygo/lib/CMSIS/CMSIS
 	@mkdir -p build/release/tinygo/lib/macos-minimal-sdk
 	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
 	@mkdir -p build/release/tinygo/lib/musl/arch
 	@mkdir -p build/release/tinygo/lib/musl/crt
@@ -867,9 +911,6 @@ build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@mkdir -p build/release/tinygo/lib/wasi-cli/
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus
-	@mkdir -p build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4
 	@echo copying source files
 	@cp -p  build/tinygo$(EXE)           build/release/tinygo/bin
 ifneq ($(USE_SYSTEM_BINARYEN),1)
@@ -891,22 +932,28 @@ endif
 	@cp -rp lib/musl/src/env             build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/errno           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/exit            build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/fcntl           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/include         build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/internal        build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/legacy          build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/locale          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/linux           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/malloc          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/mman            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/math            build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/misc            build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/multibyte       build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/signal          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/stdio           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/string          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/thread          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/time            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/unistd          build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/process         build/release/tinygo/lib/musl/src
 	@cp -rp lib/mingw-w64/mingw-w64-crt/def-include                 build/release/tinygo/lib/mingw-w64/mingw-w64-crt
 	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/api-ms-win-crt-* build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
 	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/kernel32.def.in  build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@cp -rp lib/mingw-w64/mingw-w64-crt/stdio/ucrt_*                build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@cp -rp lib/mingw-w64/mingw-w64-headers/crt/                    build/release/tinygo/lib/mingw-w64/mingw-w64-headers
 	@cp -rp lib/mingw-w64/mingw-w64-headers/defaults/include        build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
 	@cp -rp lib/nrfx/*                   build/release/tinygo/lib/nrfx
@@ -932,12 +979,6 @@ endif
 	@cp -rp llvm-project/compiler-rt/LICENSE.TXT  build/release/tinygo/lib/compiler-rt-builtins
 	@cp -rp src                          build/release/tinygo/src
 	@cp -rp targets                      build/release/tinygo/targets
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/compiler-rt     compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/compiler-rt compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/compiler-rt    compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/picolibc     picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc    picolibc

 release:
 	tar -czf build/release.tar.gz -C build/release tinygo
@@ -957,18 +998,31 @@ endif

 .PHONY: tools
 tools:
-	go generate -C ./internal/tools -tags tools  ./
+	cd internal/tools && go generate -tags tools ./

 .PHONY: lint
-lint:
-	go run github.com/mgechev/revive -version
+lint: tools ## Lint source tree
+	revive -version
 	# TODO: lint more directories!
 	# revive.toml isn't flexible enough to filter out just one kind of error from a checker, so do it with grep here.
 	# Can't use grep with friendly formatter.  Plain output isn't too bad, though.
 	# Use 'grep .' to get rid of stray blank line
-	go run github.com/mgechev/revive -config revive.toml compiler/... src/{os,reflect}/*.go | grep -v "should have comment or be unexported" | grep '.' | awk '{print}; END {exit NR>0}'
+	revive -config revive.toml compiler/... src/{os,reflect}/*.go | grep -v "should have comment or be unexported" | grep '.' | awk '{print}; END {exit NR>0}'

+SPELLDIRSCMD=find . -depth 1 -type d  | egrep -wv '.git|lib|llvm|src'; find src -depth 1 | egrep -wv 'device|internal|net|vendor'; find src/internal -depth 1 -type d | egrep -wv src/internal/wasi
 .PHONY: spell
-spell:
-	# Check for typos in comments. Skip git submodules etc.
-	go run github.com/client9/misspell/cmd/misspell -i 'ackward,devided,extint,inbetween,programmmer,rela' $$( find . -depth 1 -type d  | egrep -w -v 'lib|llvm|src/net' )
+spell: tools ## Spellcheck source tree
+	misspell -error --dict misspell.csv -i 'ackward,devided,extint,rela' $$( $(SPELLDIRSCMD) ) *.go *.md
+
+.PHONY: spellfix
+spellfix: tools ## Same as spell, but fixes what it finds
+	misspell -w --dict misspell.csv -i 'ackward,devided,extint,rela' $$( $(SPELLDIRSCMD) ) *.go *.md
+
+# https://www.client9.com/self-documenting-makefiles/
+.PHONY: help
+help:
+	@awk -F ':|##' '/^[^\t].+?:.*?##/ {\
+	gsub(/\$$\(LLVM_BUILDDIR\)/, "$(LLVM_BUILDDIR)"); \
+        printf "\033[36m%-30s\033[0m %s\n", $$1, $$NF \
+        }' $(MAKEFILE_LIST)
+#.DEFAULT_GOAL=help
@@ -0,0 +1,32 @@
+TinyGo Team Members
+===================
+
+The team of humans who maintain TinyGo.
+
+*   **Purpose**: To maintain the community, code, documentation, and tools for the TinyGo compiler.
+*   **Board**: The group of people who share responsibility for key decisions for the TinyGo organization.  
+    *   **Majority Voting**: The board makes decisions by majority vote.
+    *   **Membership**: The board elects its own members.
+*   **Do-ocracy**: Those who step forward to do a given task propose how it should be done. Then other interested people can make comments.
+*   **Proof of Work**: Power in decision-making is slightly weighted based on a participant's labor for the community.
+*   **Initiation**: We need to establish a procedure for how people join the team of maintainers.
+*   **Transparency**: Important information should be made publicly available, ideally in a way that allows for public comment.
+*   **Code of Conduct**: Participants agree to abide by the current project Code of Conduct.
+
+## Members
+
+* Ayke van Laethem (@aykevl)
+* Daniel Esteban (@conejoninja)
+* Ron Evans (@deadprogram)
+* Damian Gryski (@dgryski)
+* Masaaki Takasago (@sago35)
+* Patricio Whittingslow (@soypat)
+* Yurii Soldak (@ysoldak)
+
+## Experimental
+
+*   **Monthly Meeting**: A monthly meeting for the team and any other interested participants.  
+    Duration: 1 hour  
+    Facilitation: @deadprogram
+    Schedule: See https://github.com/tinygo-org/tinygo/wiki/Meetings for more information
+
@@ -16,7 +16,7 @@ import (
 	"github.com/blakesmith/ar"
 )

-// makeArchive creates an arcive for static linking from a list of object files
+// makeArchive creates an archive for static linking from a list of object files
 // given as a parameter. It is equivalent to the following command:
 //
 //	ar -rcs <archivePath> <objs...>
@@ -150,7 +150,7 @@ func makeArchive(arfile *os.File, objs []string) error {
 	}

 	// Keep track of the start of the symbol table.
-	symbolTableStart, err := arfile.Seek(0, os.SEEK_CUR)
+	symbolTableStart, err := arfile.Seek(0, io.SeekCurrent)
 	if err != nil {
 		return err
 	}
@@ -172,7 +172,7 @@ func makeArchive(arfile *os.File, objs []string) error {

 		// Store the start index, for when we'll update the symbol table with
 		// the correct file start indices.
-		offset, err := arfile.Seek(0, os.SEEK_CUR)
+		offset, err := arfile.Seek(0, io.SeekCurrent)
 		if err != nil {
 			return err
 		}
@@ -61,6 +61,10 @@ type BuildResult struct {
 	// correctly printing test results: the import path isn't always the same as
 	// the path listed on the command line.
 	ImportPath string
+
+	// Map from path to package name. It is needed to attribute binary size to
+	// the right Go package.
+	PackagePathMap map[string]string
 }

 // packageAction is the struct that is serialized to JSON and hashed, to work as
@@ -148,7 +152,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		job := makeDarwinLibSystemJob(config, tmpdir)
 		libcDependencies = append(libcDependencies, job)
 	case "musl":
-		job, unlock, err := Musl.load(config, tmpdir)
+		job, unlock, err := libMusl.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -156,7 +160,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(job.result), "crt1.o")))
 		libcDependencies = append(libcDependencies, job)
 	case "picolibc":
-		libcJob, unlock, err := Picolibc.load(config, tmpdir)
+		libcJob, unlock, err := libPicolibc.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -169,18 +173,19 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		}
 		libcDependencies = append(libcDependencies, dummyCompileJob(path))
 	case "wasmbuiltins":
-		libcJob, unlock, err := WasmBuiltins.load(config, tmpdir)
+		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
 		libcDependencies = append(libcDependencies, libcJob)
 	case "mingw-w64":
-		_, unlock, err := MinGW.load(config, tmpdir)
+		job, unlock, err := libMinGW.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
-		unlock()
+		defer unlock()
+		libcDependencies = append(libcDependencies, job)
 		libcDependencies = append(libcDependencies, makeMinGWExtraLibs(tmpdir, config.GOARCH())...)
 	case "":
 		// no library specified, so nothing to do
@@ -196,6 +201,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		ABI:             config.ABI(),
 		GOOS:            config.GOOS(),
 		GOARCH:          config.GOARCH(),
+		BuildMode:       config.BuildMode(),
 		CodeModel:       config.CodeModel(),
 		RelocationModel: config.RelocationModel(),
 		SizeLevel:       sizeLevel,
@@ -240,6 +246,12 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		return result, err
 	}

+	// Store which filesystem paths map to which package name.
+	result.PackagePathMap = make(map[string]string, len(lprogram.Packages))
+	for _, pkg := range lprogram.Sorted() {
+		result.PackagePathMap[pkg.OriginalDir()] = pkg.Pkg.Path()
+	}
+
 	// Create the *ssa.Program. This does not yet build the entire SSA of the
 	// program so it's pretty fast and doesn't need to be parallelized.
 	program := lprogram.LoadSSA()
@@ -648,10 +660,17 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	result.Binary = result.Executable // final file
 	ldflags := append(config.LDFlags(), "-o", result.Executable)

+	if config.Options.BuildMode == "c-shared" {
+		if !strings.HasPrefix(config.Triple(), "wasm32-") {
+			return result, fmt.Errorf("buildmode c-shared is only supported on wasm at the moment")
+		}
+		ldflags = append(ldflags, "--no-entry")
+	}
+
 	// Add compiler-rt dependency if needed. Usually this is a simple load from
 	// a cache.
 	if config.Target.RTLib == "compiler-rt" {
-		job, unlock, err := CompilerRT.load(config, tmpdir)
+		job, unlock, err := libCompilerRT.load(config, tmpdir)
 		if err != nil {
 			return result, err
 		}
@@ -681,7 +700,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	for _, pkg := range lprogram.Sorted() {
 		pkg := pkg
 		for _, filename := range pkg.CFiles {
-			abspath := filepath.Join(pkg.Dir, filename)
+			abspath := filepath.Join(pkg.OriginalDir(), filename)
 			job := &compileJob{
 				description: "compile CGo file " + abspath,
 				run: func(job *compileJob) error {
@@ -745,6 +764,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				ldflags = append(ldflags, dependency.result)
 			}
 			ldflags = append(ldflags, "-mllvm", "-mcpu="+config.CPU())
+			ldflags = append(ldflags, "-mllvm", "-mattr="+config.Features()) // needed for MIPS softfloat
 			if config.GOOS() == "windows" {
 				// Options for the MinGW wrapper for the lld COFF linker.
 				ldflags = append(ldflags,
@@ -778,7 +798,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 			}
 			err = link(config.Target.Linker, ldflags...)
 			if err != nil {
-				return &commandError{"failed to link", result.Executable, err}
+				return err
 			}

 			var calculatedStacks []string
@@ -802,6 +822,12 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					return fmt.Errorf("could not modify stack sizes: %w", err)
 				}
 			}
+
+			// Apply patches of bootloader in the order they appear.
+			if len(config.Target.BootPatches) > 0 {
+				err = applyPatches(result.Executable, config.Target.BootPatches)
+			}
+
 			if config.RP2040BootPatch() {
 				// Patch the second stage bootloader CRC into the .boot2 section
 				err = patchRP2040BootCRC(result.Executable)
@@ -821,19 +847,13 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					args = append(args, "--asyncify")
 				}

-				exeunopt := result.Executable
-
-				if config.Options.Work {
-					// Keep the work direction around => don't overwrite the .wasm binary with the optimized version
-					exeunopt += ".pre-wasm-opt"
-					os.Rename(result.Executable, exeunopt)
-				}
-
+				inputFile := result.Binary
+				result.Binary = result.Executable + ".wasmopt"
 				args = append(args,
 					opt,
 					"-g",
-					exeunopt,
-					"--output", result.Executable,
+					inputFile,
+					"--output", result.Binary,
 				)

 				wasmopt := goenv.Get("WASMOPT")
@@ -863,13 +883,15 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe

 				// wasm-tools component embed -w wasi:cli/command
 				// 		$$(tinygo env TINYGOROOT)/lib/wasi-cli/wit/ main.wasm -o embedded.wasm
+				componentEmbedInputFile := result.Binary
+				result.Binary = result.Executable + ".wasm-component-embed"
 				args := []string{
 					"component",
 					"embed",
 					"-w", witWorld,
 					witPackage,
-					result.Executable,
-					"-o", result.Executable,
+					componentEmbedInputFile,
+					"-o", result.Binary,
 				}

 				wasmtools := goenv.Get("WASMTOOLS")
@@ -882,15 +904,17 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe

 				err := cmd.Run()
 				if err != nil {
-					return fmt.Errorf("wasm-tools failed: %w", err)
+					return fmt.Errorf("`wasm-tools component embed` failed: %w", err)
 				}

 				// wasm-tools component new embedded.wasm -o component.wasm
+				componentNewInputFile := result.Binary
+				result.Binary = result.Executable + ".wasm-component-new"
 				args = []string{
 					"component",
 					"new",
-					result.Executable,
-					"-o", result.Executable,
+					componentNewInputFile,
+					"-o", result.Binary,
 				}

 				if config.Options.PrintCommands != nil {
@@ -902,24 +926,21 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe

 				err = cmd.Run()
 				if err != nil {
-					return fmt.Errorf("wasm-tools failed: %w", err)
+					return fmt.Errorf("`wasm-tools component new` failed: %w", err)
 				}
 			}

 			// Print code size if requested.
-			if config.Options.PrintSizes == "short" || config.Options.PrintSizes == "full" {
-				packagePathMap := make(map[string]string, len(lprogram.Packages))
-				for _, pkg := range lprogram.Sorted() {
-					packagePathMap[pkg.OriginalDir()] = pkg.Pkg.Path()
-				}
-				sizes, err := loadProgramSize(result.Executable, packagePathMap)
+			if config.Options.PrintSizes != "" {
+				sizes, err := loadProgramSize(result.Executable, result.PackagePathMap)
 				if err != nil {
 					return err
 				}
-				if config.Options.PrintSizes == "short" {
+				switch config.Options.PrintSizes {
+				case "short":
 					fmt.Printf("   code    data     bss |   flash     ram\n")
 					fmt.Printf("%7d %7d %7d | %7d %7d\n", sizes.Code+sizes.ROData, sizes.Data, sizes.BSS, sizes.Flash(), sizes.RAM())
-				} else {
+				case "full":
 					if !config.Debug() {
 						fmt.Println("warning: data incomplete, remove the -no-debug flag for more detail")
 					}
@@ -931,6 +952,13 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					}
 					fmt.Printf("------------------------------- | --------------- | -------\n")
 					fmt.Printf("%7d %7d %7d %7d | %7d %7d | total\n", sizes.Code, sizes.ROData, sizes.Data, sizes.BSS, sizes.Code+sizes.ROData+sizes.Data, sizes.Data+sizes.BSS)
+				case "html":
+					const filename = "size-report.html"
+					err := writeSizeReport(sizes, filename, pkgName)
+					if err != nil {
+						return err
+					}
+					fmt.Println("Wrote size report to", filename)
 				}
 			}

@@ -1257,7 +1285,7 @@ func determineStackSizes(mod llvm.Module, executable string) ([]string, map[stri
 	}

 	// Goroutines need to be started and finished and take up some stack space
-	// that way. This can be measured by measuing the stack size of
+	// that way. This can be measured by measuring the stack size of
 	// tinygo_startTask.
 	if numFuncs := len(functions["tinygo_startTask"]); numFuncs != 1 {
 		return nil, nil, fmt.Errorf("expected exactly one definition of tinygo_startTask, got %d", numFuncs)
@@ -1420,6 +1448,23 @@ func printStacks(calculatedStacks []string, stackSizes map[string]functionStackS
 	}
 }

+func applyPatches(executable string, bootPatches []string) (err error) {
+	for _, patch := range bootPatches {
+		switch patch {
+		case "rp2040":
+			err = patchRP2040BootCRC(executable)
+		// case "rp2350":
+		// 	err = patchRP2350BootIMAGE_DEF(executable)
+		default:
+			err = errors.New("undefined boot patch name")
+		}
+		if err != nil {
+			return fmt.Errorf("apply boot patch %q: %w", patch, err)
+		}
+	}
+	return nil
+}
+
 // RP2040 second stage bootloader CRC32 calculation
 //
 // Spec: https://datasheets.raspberrypi.org/rp2040/rp2040-datasheet.pdf
@@ -1431,7 +1476,7 @@ func patchRP2040BootCRC(executable string) error {
 	}

 	if len(bytes) != 256 {
-		return fmt.Errorf("rp2040 .boot2 section must be exactly 256 bytes")
+		return fmt.Errorf("rp2040 .boot2 section must be exactly 256 bytes, got %d", len(bytes))
 	}

 	// From the 'official' RP2040 checksum script:
@@ -1470,3 +1515,10 @@ func lock(path string) func() {

 	return func() { flock.Close() }
 }
+
+func b2u8(b bool) uint8 {
+	if b {
+		return 1
+	}
+	return 0
+}
@@ -33,6 +33,7 @@ func TestClangAttributes(t *testing.T) {
 		"k210",
 		"nintendoswitch",
 		"riscv-qemu",
+		"tkey",
 		"wasip1",
 		"wasip2",
 		"wasm",
@@ -53,23 +54,30 @@ func TestClangAttributes(t *testing.T) {
 	for _, options := range []*compileopts.Options{
 		{GOOS: "linux", GOARCH: "386"},
 		{GOOS: "linux", GOARCH: "amd64"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "5"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "6"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "7"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "5,softfloat"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "6,softfloat"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "7,softfloat"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "5,hardfloat"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "6,hardfloat"},
+		{GOOS: "linux", GOARCH: "arm", GOARM: "7,hardfloat"},
 		{GOOS: "linux", GOARCH: "arm64"},
-		{GOOS: "linux", GOARCH: "mips"},
-		{GOOS: "linux", GOARCH: "mipsle"},
+		{GOOS: "linux", GOARCH: "mips", GOMIPS: "hardfloat"},
+		{GOOS: "linux", GOARCH: "mipsle", GOMIPS: "hardfloat"},
+		{GOOS: "linux", GOARCH: "mips", GOMIPS: "softfloat"},
+		{GOOS: "linux", GOARCH: "mipsle", GOMIPS: "softfloat"},
 		{GOOS: "darwin", GOARCH: "amd64"},
 		{GOOS: "darwin", GOARCH: "arm64"},
 		{GOOS: "windows", GOARCH: "amd64"},
 		{GOOS: "windows", GOARCH: "arm64"},
 		{GOOS: "wasip1", GOARCH: "wasm"},
-		{GOOS: "wasip2", GOARCH: "wasm"},
 	} {
 		name := "GOOS=" + options.GOOS + ",GOARCH=" + options.GOARCH
 		if options.GOARCH == "arm" {
 			name += ",GOARM=" + options.GOARM
 		}
+		if options.GOARCH == "mips" || options.GOARCH == "mipsle" {
+			name += ",GOMIPS=" + options.GOMIPS
+		}
 		t.Run(name, func(t *testing.T) {
 			testClangAttributes(t, options)
 		})
@@ -3,8 +3,8 @@ package builder
 import (
 	"os"
 	"path/filepath"
-	"strings"

+	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/goenv"
 )

@@ -132,6 +132,38 @@ var genericBuiltins = []string{
 	"umodti3.c",
 }

+// These are the GENERIC_TF_SOURCES as of LLVM 18.
+// They are not needed on all platforms (32-bit platforms usually don't need
+// these) but they seem to compile fine so it's easier to include them.
+var genericBuiltins128 = []string{
+	"addtf3.c",
+	"comparetf2.c",
+	"divtc3.c",
+	"divtf3.c",
+	"extenddftf2.c",
+	"extendhftf2.c",
+	"extendsftf2.c",
+	"fixtfdi.c",
+	"fixtfsi.c",
+	"fixtfti.c",
+	"fixunstfdi.c",
+	"fixunstfsi.c",
+	"fixunstfti.c",
+	"floatditf.c",
+	"floatsitf.c",
+	"floattitf.c",
+	"floatunditf.c",
+	"floatunsitf.c",
+	"floatuntitf.c",
+	"multc3.c",
+	"multf3.c",
+	"powitf2.c",
+	"subtf3.c",
+	"trunctfdf2.c",
+	"trunctfhf2.c",
+	"trunctfsf2.c",
+}
+
 var aeabiBuiltins = []string{
 	"arm/aeabi_cdcmp.S",
 	"arm/aeabi_cdcmpeq_check_nan.c",
@@ -169,12 +201,12 @@ var avrBuiltins = []string{
 	"avr/udivmodqi4.S",
 }

-// CompilerRT is a library with symbols required by programs compiled with LLVM.
-// These symbols are for operations that cannot be emitted with a single
+// libCompilerRT is a library with symbols required by programs compiled with
+// LLVM. These symbols are for operations that cannot be emitted with a single
 // instruction or a short sequence of instructions for that target.
 //
 // For more information, see: https://compiler-rt.llvm.org/
-var CompilerRT = Library{
+var libCompilerRT = Library{
 	name: "compiler-rt",
 	cflags: func(target, headerPath string) []string {
 		return []string{"-Werror", "-Wall", "-std=c11", "-nostdlibinc"}
@@ -190,11 +222,13 @@ var CompilerRT = Library{
 	},
 	librarySources: func(target string) ([]string, error) {
 		builtins := append([]string{}, genericBuiltins...) // copy genericBuiltins
-		if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
+		switch compileopts.CanonicalArchName(target) {
+		case "arm":
 			builtins = append(builtins, aeabiBuiltins...)
-		}
-		if strings.HasPrefix(target, "avr") {
+		case "avr":
 			builtins = append(builtins, avrBuiltins...)
+		case "x86_64", "aarch64", "riscv64": // any 64-bit arch
+			builtins = append(builtins, genericBuiltins128...)
 		}
 		return builtins, nil
 	},
@@ -93,7 +93,7 @@ struct AssemblerInvocation {
  EmitDwarfUnwindType EmitDwarfUnwind;

  // Whether to emit compact-unwind for non-canonical entries.
-  // Note: maybe overriden by other constraints.
+  // Note: maybe overridden by other constraints.
  unsigned EmitCompactUnwindNonCanonical : 1;

  /// The name of the relocation model to use.
@@ -3,7 +3,6 @@ package builder
 import (
 	"errors"
 	"fmt"
-	"os"
 	"os/exec"
 	"runtime"
 	"strings"
@@ -76,14 +75,3 @@ func LookupCommand(name string) (string, error) {
 	}
 	return "", errors.New("none of these commands were found in your $PATH: " + strings.Join(commands[name], " "))
 }
-
-func execCommand(name string, args ...string) error {
-	name, err := LookupCommand(name)
-	if err != nil {
-		return err
-	}
-	cmd := exec.Command(name, args...)
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	return cmd.Run()
-}
@@ -2,6 +2,7 @@ package builder

 import (
 	"fmt"
+	"runtime"

 	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/goenv"
@@ -23,20 +24,37 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 		spec.OpenOCDCommands = options.OpenOCDCommands
 	}

-	major, minor, err := goenv.GetGorootVersion()
+	// Version range supported by TinyGo.
+	const minorMin = 19
+	const minorMax = 23
+
+	// Check that we support this Go toolchain version.
+	gorootMajor, gorootMinor, err := goenv.GetGorootVersion()
 	if err != nil {
 		return nil, err
 	}
-	if major != 1 || minor < 19 || minor > 22 {
+	if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-		return nil, fmt.Errorf("requires go version 1.19 through 1.22, got go%d.%d", major, minor)
+		return nil, fmt.Errorf("requires go version 1.19 through 1.23, got go%d.%d", gorootMajor, gorootMinor)
+	}
+
+	// Check that the Go toolchain version isn't too new, if we haven't been
+	// compiled with the latest Go version.
+	// This may be a bit too aggressive: if the newer version doesn't change the
+	// Go language we will most likely be able to compile it.
+	buildMajor, buildMinor, _, err := goenv.Parse(runtime.Version())
+	if err != nil {
+		return nil, err
+	}
+	if buildMajor != 1 || buildMinor < gorootMinor {
+		return nil, fmt.Errorf("cannot compile with Go toolchain version go%d.%d (TinyGo was built using toolchain version %s)", gorootMajor, gorootMinor, runtime.Version())
 	}

 	return &compileopts.Config{
 		Options:        options,
 		Target:         spec,
-		GoMinorVersion: minor,
+		GoMinorVersion: gorootMinor,
 		TestConfig:     options.TestConfig,
 	}, nil
 }
@@ -15,12 +15,12 @@ func (e *MultiError) Error() string {

 // newMultiError returns a *MultiError if there is more than one error, or
 // returns that error directly when there is only one. Passing an empty slice
-// will lead to a panic.
+// will return nil (because there is no error).
 // The importPath may be passed if this error is for a single package.
 func newMultiError(errs []error, importPath string) error {
 	switch len(errs) {
 	case 0:
-		panic("attempted to create empty MultiError")
+		return nil
 	case 1:
 		return errs[0]
 	default:
@@ -17,14 +17,6 @@ import (
 // concurrency or performance issues.
 const jobRunnerDebug = false

-type jobState uint8
-
-const (
-	jobStateQueued   jobState = iota // not yet running
-	jobStateRunning                  // running
-	jobStateFinished                 // finished running
-)
-
 // compileJob is a single compiler job, comparable to a single Makefile target.
 // It is used to orchestrate various compiler tasks that can be run in parallel
 // but that have dependencies and thus have limitations in how they can be run.
@@ -55,12 +47,11 @@ func dummyCompileJob(result string) *compileJob {
 // ordered as such in the job dependencies.
 func runJobs(job *compileJob, sema chan struct{}) error {
 	if sema == nil {
-		// Have a default, if the semaphore isn't set. This is useful for
-		// tests.
+		// Have a default, if the semaphore isn't set. This is useful for tests.
 		sema = make(chan struct{}, runtime.NumCPU())
 	}
 	if cap(sema) == 0 {
-		return errors.New("cannot 0 jobs at a time")
+		return errors.New("cannot run 0 jobs at a time")
 	}

 	// Create a slice of jobs to run, where all dependencies are run in order.
@@ -81,10 +72,10 @@ func runJobs(job *compileJob, sema chan struct{}) error {

 	waiting := make(map[*compileJob]map[*compileJob]struct{}, len(jobs))
 	dependents := make(map[*compileJob][]*compileJob, len(jobs))
-	jidx := make(map[*compileJob]int)
+	compileJobs := make(map[*compileJob]int)
 	var ready intHeap
 	for i, job := range jobs {
-		jidx[job] = i
+		compileJobs[job] = i
 		if len(job.dependencies) == 0 {
 			// This job is ready to run.
 			ready.Push(i)
@@ -105,8 +96,7 @@ func runJobs(job *compileJob, sema chan struct{}) error {
 	// Create a channel to accept notifications of completion.
 	doneChan := make(chan *compileJob)

-	// Send each job in the jobs slice to a worker, taking care of job
-	// dependencies.
+	// Send each job in the jobs slice to a worker, taking care of job dependencies.
 	numRunningJobs := 0
 	var totalTime time.Duration
 	start := time.Now()
@@ -156,7 +146,7 @@ func runJobs(job *compileJob, sema chan struct{}) error {
 			delete(wait, completed)
 			if len(wait) == 0 {
 				// This job is now ready to run.
-				ready.Push(jidx[j])
+				ready.Push(compileJobs[j])
 				delete(waiting, j)
 			}
 		}
@@ -35,19 +35,6 @@ type Library struct {
 	crt1Source string
 }

-// Load the library archive, possibly generating and caching it if needed.
-// The resulting directory may be stored in the provided tmpdir, which is
-// expected to be removed after the Load call.
-func (l *Library) Load(config *compileopts.Config, tmpdir string) (dir string, err error) {
-	job, unlock, err := l.load(config, tmpdir)
-	if err != nil {
-		return "", err
-	}
-	defer unlock()
-	err = runJobs(job, config.Options.Semaphore)
-	return filepath.Dir(job.result), err
-}
-
 // load returns a compile job to build this library file for the given target
 // and CPU. It may return a dummy compileJob if the library build is already
 // cached. The path is stored as job.result but is only valid after the job has
@@ -162,29 +149,38 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 	if config.ABI() != "" {
 		args = append(args, "-mabi="+config.ABI())
 	}
-	if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
+	switch compileopts.CanonicalArchName(target) {
+	case "arm":
 		if strings.Split(target, "-")[2] == "linux" {
 			args = append(args, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
 		} else {
 			args = append(args, "-fshort-enums", "-fomit-frame-pointer", "-mfloat-abi=soft", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
 		}
-	}
-	if strings.HasPrefix(target, "avr") {
+	case "avr":
 		// AVR defaults to C float and double both being 32-bit. This deviates
 		// from what most code (and certainly compiler-rt) expects. So we need
 		// to force the compiler to use 64-bit floating point numbers for
 		// double.
 		args = append(args, "-mdouble=64")
-	}
-	if strings.HasPrefix(target, "riscv32-") {
+	case "riscv32":
 		args = append(args, "-march=rv32imac", "-fforce-enable-int128")
-	}
-	if strings.HasPrefix(target, "riscv64-") {
+	case "riscv64":
 		args = append(args, "-march=rv64gc")
-	}
-	if strings.HasPrefix(target, "mips") {
+	case "mips":
 		args = append(args, "-fno-pic")
 	}
+	if config.Target.SoftFloat {
+		// Use softfloat instead of floating point instructions. This is
+		// supported on many architectures.
+		args = append(args, "-msoft-float")
+	} else {
+		if strings.HasPrefix(target, "armv5") {
+			// On ARMv5 we need to explicitly enable hardware floating point
+			// instructions: Clang appears to assume the hardware doesn't have a
+			// FPU otherwise.
+			args = append(args, "-mfpu=vfpv2")
+		}
+	}

 	var once sync.Once

@@ -10,7 +10,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var MinGW = Library{
+var libMinGW = Library{
 	name: "mingw-w64",
 	makeHeaders: func(target, includeDir string) error {
 		// copy _mingw.h
@@ -27,14 +27,30 @@ var MinGW = Library{
 		_, err = io.Copy(outf, inf)
 		return err
 	},
-	sourceDir: func() string { return "" }, // unused
+	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64") },
 	cflags: func(target, headerPath string) []string {
-		// No flags necessary because there are no files to compile.
-		return nil
+		mingwDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", mingwDir + "/mingw-w64-headers/crt",
+			"-I", mingwDir + "/mingw-w64-headers/defaults/include",
+			"-I" + headerPath,
+		}
 	},
 	librarySources: func(target string) ([]string, error) {
-		// We only use the UCRT DLL file. No source files necessary.
-		return nil, nil
+		// These files are needed so that printf and the like are supported.
+		sources := []string{
+			"mingw-w64-crt/stdio/ucrt_fprintf.c",
+			"mingw-w64-crt/stdio/ucrt_fwprintf.c",
+			"mingw-w64-crt/stdio/ucrt_printf.c",
+			"mingw-w64-crt/stdio/ucrt_snprintf.c",
+			"mingw-w64-crt/stdio/ucrt_sprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vfprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vsnprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vsprintf.c",
+		}
+		return sources, nil
 	},
 }

@@ -12,7 +12,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var Musl = Library{
+var libMusl = Library{
 	name: "musl",
 	makeHeaders: func(target, includeDir string) error {
 		bits := filepath.Join(includeDir, "bits")
@@ -92,6 +92,8 @@ var Musl = Library{
 			"-Wno-ignored-pragmas",
 			"-Wno-tautological-constant-out-of-range-compare",
 			"-Wno-deprecated-non-prototype",
+			"-Wno-format",
+			"-Wno-parentheses",
 			"-Qunused-arguments",
 			// Select include dirs. Don't include standard library includes
 			// (that would introduce host dependencies and other complications),
@@ -114,16 +116,21 @@ var Musl = Library{
 			"env/*.c",
 			"errno/*.c",
 			"exit/*.c",
+			"fcntl/*.c",
 			"internal/defsysinfo.c",
 			"internal/libc.c",
 			"internal/syscall_ret.c",
 			"internal/vdso.c",
 			"legacy/*.c",
+			"locale/*.c",
 			"linux/*.c",
 			"malloc/*.c",
 			"malloc/mallocng/*.c",
 			"mman/*.c",
 			"math/*.c",
+			"misc/*.c",
+			"multibyte/*.c",
+			"signal/" + arch + "/*.s",
 			"signal/*.c",
 			"stdio/*.c",
 			"string/*.c",
@@ -131,12 +138,20 @@ var Musl = Library{
 			"thread/*.c",
 			"time/*.c",
 			"unistd/*.c",
+			"process/*.c",
 		}
+
 		if arch == "arm" {
 			// These files need to be added to the start for some reason.
 			globs = append([]string{"thread/arm/*.c"}, globs...)
 		}

+		if arch != "aarch64" && arch != "mips" {
+			//aarch64 and mips have no architecture specific code, either they
+			// are not supported or don't need any?
+			globs = append([]string{"process/" + arch + "/*.s"}, globs...)
+		}
+
 		var sources []string
 		seenSources := map[string]struct{}{}
 		basepath := goenv.Get("TINYGOROOT") + "/lib/musl/src/"
@@ -8,9 +8,9 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-// Picolibc is a C library for bare metal embedded devices. It was originally
+// libPicolibc is a C library for bare metal embedded devices. It was originally
 // based on newlib.
-var Picolibc = Library{
+var libPicolibc = Library{
 	name: "picolibc",
 	makeHeaders: func(target, includeDir string) error {
 		f, err := os.Create(filepath.Join(includeDir, "picolibc.h"))
@@ -29,10 +29,12 @@ var Picolibc = Library{
 			"-D_HAVE_ALIAS_ATTRIBUTE",
 			"-DTINY_STDIO",
 			"-DPOSIX_IO",
+			"-DFORMAT_DEFAULT_INTEGER", // use __i_vfprintf and __i_vfscanf by default
 			"-D_IEEE_LIBM",
 			"-D__OBSOLETE_MATH_FLOAT=1", // use old math code that doesn't expect a FPU
 			"-D__OBSOLETE_MATH_DOUBLE=0",
 			"-D_WANT_IO_C99_FORMATS",
+			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
 			"-nostdlibinc",
 			"-isystem", newlibDir + "/libc/include",
 			"-I" + newlibDir + "/libc/tinystdio",
@@ -0,0 +1,56 @@
+package builder
+
+import (
+	_ "embed"
+	"fmt"
+	"html/template"
+	"os"
+)
+
+//go:embed size-report.html
+var sizeReportBase string
+
+func writeSizeReport(sizes *programSize, filename, pkgName string) error {
+	tmpl, err := template.New("report").Parse(sizeReportBase)
+	if err != nil {
+		return err
+	}
+
+	f, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("could not open report file: %w", err)
+	}
+	defer f.Close()
+
+	// Prepare data for the report.
+	type sizeLine struct {
+		Name string
+		Size *packageSize
+	}
+	programData := []sizeLine{}
+	for _, name := range sizes.sortedPackageNames() {
+		pkgSize := sizes.Packages[name]
+		programData = append(programData, sizeLine{
+			Name: name,
+			Size: pkgSize,
+		})
+	}
+	sizeTotal := map[string]uint64{
+		"code":   sizes.Code,
+		"rodata": sizes.ROData,
+		"data":   sizes.Data,
+		"bss":    sizes.BSS,
+		"flash":  sizes.Flash(),
+	}
+
+	// Write the report.
+	err = tmpl.Execute(f, map[string]any{
+		"pkgName":   pkgName,
+		"sizes":     programData,
+		"sizeTotal": sizeTotal,
+	})
+	if err != nil {
+		return fmt.Errorf("could not create report file: %w", err)
+	}
+	return nil
+}
@@ -0,0 +1,109 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Size Report for {{.pkgName}}</title>
+    <meta charset="utf-8"/>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
+    <style>
+
+.table-vertical-border {
+  border-left: calc(var(--bs-border-width) * 2) solid currentcolor;
+}
+
+/* Hover on only the rows that are clickable. */
+.row-package:hover > * {
+  --bs-table-color-state: var(--bs-table-hover-color);
+  --bs-table-bg-state: var(--bs-table-hover-bg);
+}
+
+    </style>
+  </head>
+  <body>
+    <div class="container-xxl">
+      <h1>Size Report for {{.pkgName}}</h1>
+
+      <p>How much space is used by Go packages, C libraries, and other bits to set up the program environment.</p>
+
+      <ul>
+        <li><strong>Code</strong> is the actual program code (machine code instructions).</li>
+        <li><strong>Read-only data</strong> are read-only global variables. On most microcontrollers, these are stored in flash and do not take up any RAM.</li>
+        <li><strong>Data</strong> are writable global variables with a non-zero initializer. On microcontrollers, they are copied from flash to RAM on reset.</li>
+        <li><strong>BSS</strong> are writable global variables that are zero initialized. They do not take up any space in the binary, but do take up RAM. On microcontrollers, this area is zeroed on reset.</li>
+      </ul>
+
+      <p>The binary size consists of code, read-only data, and data. On microcontrollers, this is exactly the size of the firmware image. On other systems, there is some extra overhead: binary metadata (headers of the ELF/MachO/COFF file), debug information, exception tables, symbol names, etc. Using <code>-no-debug</code> strips most of those.</p>
+
+      <h2>Program breakdown</h2>
+
+      <p>You can click on the rows below to see which files contribute to the binary size.</p>
+
+      <div class="table-responsive">
+        <table class="table w-auto">
+          <thead>
+            <tr>
+              <th>Package</th>
+              <th class="table-vertical-border">Code</th>
+              <th>Read-only data</th>
+              <th>Data</th>
+              <th title="zero-initialized data">BSS</th>
+              <th class="table-vertical-border" style="min-width: 16em">Binary size</th>
+            </tr>
+          </thead>
+          <tbody class="table-group-divider">
+            {{range $i, $pkg := .sizes}}
+            <tr class="row-package" data-collapse=".collapse-row-{{$i}}">
+              <td>{{.Name}}</td>
+              <td class="table-vertical-border">{{.Size.Code}}</td>
+              <td>{{.Size.ROData}}</td>
+              <td>{{.Size.Data}}</td>
+              <td>{{.Size.BSS}}</td>
+              <td class="table-vertical-border" style="background: linear-gradient(to right, var(--bs-info-bg-subtle) {{.Size.FlashPercent}}%, var(--bs-table-bg) {{.Size.FlashPercent}}%)">
+                {{.Size.Flash}}
+              </td>
+            </tr>
+            {{range $filename, $sizes := .Size.Sub}}
+            <tr class="table-secondary collapse collapse-row-{{$i}}">
+              <td class="ps-4">
+                {{if eq $filename ""}}
+                  (unknown file)
+                {{else}}
+                  {{$filename}}
+                {{end}}
+              </td>
+              <td class="table-vertical-border">{{$sizes.Code}}</td>
+              <td>{{$sizes.ROData}}</td>
+              <td>{{$sizes.Data}}</td>
+              <td>{{$sizes.BSS}}</td>
+              <td class="table-vertical-border" style="background: linear-gradient(to right, var(--bs-info-bg-subtle) {{$sizes.FlashPercent}}%, var(--bs-table-bg) {{$sizes.FlashPercent}}%)">
+                {{$sizes.Flash}}
+              </td>
+            </tr>
+            {{end}}
+            {{end}}
+          </tbody>
+          <tfoot class="table-group-divider">
+            <tr>
+              <th>Total</th>
+              <td class="table-vertical-border">{{.sizeTotal.code}}</td>
+              <td>{{.sizeTotal.rodata}}</td>
+              <td>{{.sizeTotal.data}}</td>
+              <td>{{.sizeTotal.bss}}</td>
+              <td class="table-vertical-border">{{.sizeTotal.flash}}</td>
+            </tr>
+          </tfoot>
+        </table>
+      </div>
+    </div>
+    <script>
+// Make table rows toggleable to show filenames.
+for (let clickable of document.querySelectorAll('.row-package')) {
+  clickable.addEventListener('click', e => {
+    for (let row of document.querySelectorAll(clickable.dataset.collapse)) {
+      row.classList.toggle('show');
+    }
+  });
+}
+    </script>
+  </body>
+</html>
@@ -12,6 +12,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"runtime"
 	"sort"
 	"strings"

@@ -24,7 +25,7 @@ const sizesDebug = false

 // programSize contains size statistics per package of a compiled program.
 type programSize struct {
-	Packages map[string]packageSize
+	Packages map[string]*packageSize
 	Code     uint64
 	ROData   uint64
 	Data     uint64
@@ -52,13 +53,29 @@ func (ps *programSize) RAM() uint64 {
 	return ps.Data + ps.BSS
 }

+// Return the package size information for a given package path, creating it if
+// it doesn't exist yet.
+func (ps *programSize) getPackage(path string) *packageSize {
+	if field, ok := ps.Packages[path]; ok {
+		return field
+	}
+	field := &packageSize{
+		Program: ps,
+		Sub:     map[string]*packageSize{},
+	}
+	ps.Packages[path] = field
+	return field
+}
+
 // packageSize contains the size of a package, calculated from the linked object
 // file.
 type packageSize struct {
-	Code   uint64
-	ROData uint64
-	Data   uint64
-	BSS    uint64
+	Program *programSize
+	Code    uint64
+	ROData  uint64
+	Data    uint64
+	BSS     uint64
+	Sub     map[string]*packageSize
 }

 // Flash usage in regular microcontrollers.
@@ -71,6 +88,31 @@ func (ps *packageSize) RAM() uint64 {
 	return ps.Data + ps.BSS
 }

+// Flash usage in regular microcontrollers, as a percentage of the total flash
+// usage of the program.
+func (ps *packageSize) FlashPercent() float64 {
+	return float64(ps.Flash()) / float64(ps.Program.Flash()) * 100
+}
+
+// Add a single size data point to this package.
+// This must only be called while calculating package size, not afterwards.
+func (ps *packageSize) addSize(getField func(*packageSize, bool) *uint64, filename string, size uint64, isVariable bool) {
+	if size == 0 {
+		return
+	}
+
+	// Add size for the package.
+	*getField(ps, isVariable) += size
+
+	// Add size for file inside package.
+	sub, ok := ps.Sub[filename]
+	if !ok {
+		sub = &packageSize{Program: ps.Program}
+		ps.Sub[filename] = sub
+	}
+	*getField(sub, isVariable) += size
+}
+
 // A mapping of a single chunk of code or data to a file path.
 type addressLine struct {
 	Address    uint64
@@ -194,11 +236,22 @@ func readProgramSizeFromDWARF(data *dwarf.Data, codeOffset, codeAlignment uint64
 				if !prevLineEntry.EndSequence {
 					// The chunk describes the code from prevLineEntry to
 					// lineEntry.
+					path := prevLineEntry.File.Name
+					if runtime.GOOS == "windows" {
+						// Work around a Clang bug on Windows:
+						// https://github.com/llvm/llvm-project/issues/117317
+						path = strings.ReplaceAll(path, "\\\\", "\\")
+
+						// wasi-libc likes to use forward slashes, but we
+						// canonicalize everything to use backwards slashes as
+						// is common on Windows.
+						path = strings.ReplaceAll(path, "/", "\\")
+					}
 					line := addressLine{
 						Address: prevLineEntry.Address + codeOffset,
 						Length:  lineEntry.Address - prevLineEntry.Address,
 						Align:   codeAlignment,
-						File:    prevLineEntry.File.Name,
+						File:    path,
 					}
 					if line.Length != 0 {
 						addresses = append(addresses, line)
@@ -773,49 +826,40 @@ func loadProgramSize(path string, packagePathMap map[string]string) (*programSiz

 	// Now finally determine the binary/RAM size usage per package by going
 	// through each allocated section.
-	sizes := make(map[string]packageSize)
+	sizes := make(map[string]*packageSize)
+	program := &programSize{
+		Packages: sizes,
+	}
 	for _, section := range sections {
 		switch section.Type {
 		case memoryCode:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
+			readSection(section, addresses, program, func(ps *packageSize, isVariable bool) *uint64 {
 				if isVariable {
-					field.ROData += size
-				} else {
-					field.Code += size
+					return &ps.ROData
 				}
-				sizes[path] = field
+				return &ps.Code
 			}, packagePathMap)
 		case memoryROData:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.ROData += size
-				sizes[path] = field
+			readSection(section, addresses, program, func(ps *packageSize, isVariable bool) *uint64 {
+				return &ps.ROData
 			}, packagePathMap)
 		case memoryData:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.Data += size
-				sizes[path] = field
+			readSection(section, addresses, program, func(ps *packageSize, isVariable bool) *uint64 {
+				return &ps.Data
 			}, packagePathMap)
 		case memoryBSS:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.BSS += size
-				sizes[path] = field
+			readSection(section, addresses, program, func(ps *packageSize, isVariable bool) *uint64 {
+				return &ps.BSS
 			}, packagePathMap)
 		case memoryStack:
 			// We store the C stack as a pseudo-package.
-			sizes["C stack"] = packageSize{
-				BSS: section.Size,
-			}
+			program.getPackage("C stack").addSize(func(ps *packageSize, isVariable bool) *uint64 {
+				return &ps.BSS
+			}, "", section.Size, false)
 		}
 	}

 	// ...and summarize the results.
-	program := &programSize{
-		Packages: sizes,
-	}
 	for _, pkg := range sizes {
 		program.Code += pkg.Code
 		program.ROData += pkg.ROData
@@ -826,8 +870,8 @@ func loadProgramSize(path string, packagePathMap map[string]string) (*programSiz
 }

 // readSection determines for each byte in this section to which package it
-// belongs. It reports this usage through the addSize callback.
-func readSection(section memorySection, addresses []addressLine, addSize func(string, uint64, bool), packagePathMap map[string]string) {
+// belongs.
+func readSection(section memorySection, addresses []addressLine, program *programSize, getField func(*packageSize, bool) *uint64, packagePathMap map[string]string) {
 	// The addr variable tracks at which address we are while going through this
 	// section. We start at the beginning.
 	addr := section.Address
@@ -849,9 +893,9 @@ func readSection(section memorySection, addresses []addressLine, addSize func(st
 			addrAligned := (addr + line.Align - 1) &^ (line.Align - 1)
 			if line.Align > 1 && addrAligned >= line.Address {
 				// It is, assume that's what causes the gap.
-				addSize("(padding)", line.Address-addr, true)
+				program.getPackage("(padding)").addSize(getField, "", line.Address-addr, true)
 			} else {
-				addSize("(unknown)", line.Address-addr, false)
+				program.getPackage("(unknown)").addSize(getField, "", line.Address-addr, false)
 				if sizesDebug {
 					fmt.Printf("%08x..%08x %5d:  unknown (gap), alignment=%d\n", addr, line.Address, line.Address-addr, line.Align)
 				}
@@ -873,7 +917,8 @@ func readSection(section memorySection, addresses []addressLine, addSize func(st
 			length = line.Length - (addr - line.Address)
 		}
 		// Finally, mark this chunk of memory as used by the given package.
-		addSize(findPackagePath(line.File, packagePathMap), length, line.IsVariable)
+		packagePath, filename := findPackagePath(line.File, packagePathMap)
+		program.getPackage(packagePath).addSize(getField, filename, length, line.IsVariable)
 		addr = line.Address + line.Length
 	}
 	if addr < sectionEnd {
@@ -882,9 +927,9 @@ func readSection(section memorySection, addresses []addressLine, addSize func(st
 		if section.Align > 1 && addrAligned >= sectionEnd {
 			// The gap is caused by the section alignment.
 			// For example, if a .rodata section ends with a non-aligned string.
-			addSize("(padding)", sectionEnd-addr, true)
+			program.getPackage("(padding)").addSize(getField, "", sectionEnd-addr, true)
 		} else {
-			addSize("(unknown)", sectionEnd-addr, false)
+			program.getPackage("(unknown)").addSize(getField, "", sectionEnd-addr, false)
 			if sizesDebug {
 				fmt.Printf("%08x..%08x %5d:  unknown (end), alignment=%d\n", addr, sectionEnd, sectionEnd-addr, section.Align)
 			}
@@ -894,17 +939,25 @@ func readSection(section memorySection, addresses []addressLine, addSize func(st

 // findPackagePath returns the Go package (or a pseudo package) for the given
 // path. It uses some heuristics, for example for some C libraries.
-func findPackagePath(path string, packagePathMap map[string]string) string {
+func findPackagePath(path string, packagePathMap map[string]string) (packagePath, filename string) {
 	// Check whether this path is part of one of the compiled packages.
 	packagePath, ok := packagePathMap[filepath.Dir(path)]
-	if !ok {
+	if ok {
+		// Directory is known as a Go package.
+		// Add the file itself as well.
+		filename = filepath.Base(path)
+	} else {
 		if strings.HasPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")) {
 			// Emit C libraries (in the lib subdirectory of TinyGo) as a single
-			// package, with a "C" prefix. For example: "C compiler-rt" for the
-			// compiler runtime library from LLVM.
-			packagePath = "C " + strings.Split(strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")), string(os.PathSeparator))[1]
-		} else if strings.HasPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project")) {
+			// package, with a "C" prefix. For example: "C picolibc" for the
+			// baremetal libc.
+			libPath := strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")+string(os.PathSeparator))
+			parts := strings.SplitN(libPath, string(os.PathSeparator), 2)
+			packagePath = "C " + parts[0]
+			filename = parts[1]
+		} else if prefix := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project", "compiler-rt"); strings.HasPrefix(path, prefix) {
 			packagePath = "C compiler-rt"
+			filename = strings.TrimPrefix(path, prefix+string(os.PathSeparator))
 		} else if packageSymbolRegexp.MatchString(path) {
 			// Parse symbol names like main$alloc or runtime$string.
 			packagePath = path[:strings.LastIndex(path, "$")]
@@ -927,9 +980,11 @@ func findPackagePath(path string, packagePathMap map[string]string) string {
 			// fixed in the compiler.
 			packagePath = "-"
 		} else {
-			// This is some other path. Not sure what it is, so just emit its directory.
-			packagePath = filepath.Dir(path) // fallback
+			// This is some other path. Not sure what it is, so just emit its
+			// directory as a fallback.
+			packagePath = filepath.Dir(path)
+			filename = filepath.Base(path)
 		}
 	}
-	return packagePath
+	return
 }
@@ -1,6 +1,7 @@
 package builder

 import (
+	"regexp"
 	"runtime"
 	"testing"
 	"time"
@@ -41,9 +42,9 @@ func TestBinarySize(t *testing.T) {
 	// This is a small number of very diverse targets that we want to test.
 	tests := []sizeTest{
 		// microcontrollers
-		{"hifive1b", "examples/echo", 4484, 280, 0, 2252},
-		{"microbit", "examples/serial", 2732, 388, 8, 2256},
-		{"wioterminal", "examples/pininterrupt", 6016, 1484, 116, 6816},
+		{"hifive1b", "examples/echo", 4600, 280, 0, 2268},
+		{"microbit", "examples/serial", 2908, 388, 8, 2272},
+		{"wioterminal", "examples/pininterrupt", 6140, 1484, 116, 6824},

 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the
@@ -55,26 +56,7 @@ func TestBinarySize(t *testing.T) {
 			t.Parallel()

 			// Build the binary.
-			options := compileopts.Options{
-				Target:        tc.target,
-				Opt:           "z",
-				Semaphore:     sema,
-				InterpTimeout: 60 * time.Second,
-				Debug:         true,
-				VerifyIR:      true,
-			}
-			target, err := compileopts.LoadTarget(&options)
-			if err != nil {
-				t.Fatal("could not load target:", err)
-			}
-			config := &compileopts.Config{
-				Options: &options,
-				Target:  target,
-			}
-			result, err := Build(tc.path, "", t.TempDir(), config)
-			if err != nil {
-				t.Fatal("could not build:", err)
-			}
+			result := buildBinary(t, tc.target, tc.path)

 			// Check whether the size of the binary matches the expected size.
 			sizes, err := loadProgramSize(result.Executable, nil)
@@ -90,3 +72,69 @@ func TestBinarySize(t *testing.T) {
 		})
 	}
 }
+
+// Check that the -size=full flag attributes binary size to the correct package
+// without filesystem paths and things like that.
+func TestSizeFull(t *testing.T) {
+	tests := []string{
+		"microbit",
+		"wasip1",
+	}
+
+	libMatch := regexp.MustCompile(`^C [a-z -]+$`) // example: "C interrupt vector"
+	pkgMatch := regexp.MustCompile(`^[a-z/]+$`)    // example: "internal/task"
+
+	for _, target := range tests {
+		target := target
+		t.Run(target, func(t *testing.T) {
+			t.Parallel()
+
+			// Build the binary.
+			result := buildBinary(t, target, "examples/serial")
+
+			// Check whether the binary doesn't contain any unexpected package
+			// names.
+			sizes, err := loadProgramSize(result.Executable, result.PackagePathMap)
+			if err != nil {
+				t.Fatal("could not read program size:", err)
+			}
+			for _, pkg := range sizes.sortedPackageNames() {
+				if pkg == "(padding)" || pkg == "(unknown)" {
+					// TODO: correctly attribute all unknown binary size.
+					continue
+				}
+				if libMatch.MatchString(pkg) {
+					continue
+				}
+				if pkgMatch.MatchString(pkg) {
+					continue
+				}
+				t.Error("unexpected package name in size output:", pkg)
+			}
+		})
+	}
+}
+
+func buildBinary(t *testing.T, targetString, pkgName string) BuildResult {
+	options := compileopts.Options{
+		Target:        targetString,
+		Opt:           "z",
+		Semaphore:     sema,
+		InterpTimeout: 60 * time.Second,
+		Debug:         true,
+		VerifyIR:      true,
+	}
+	target, err := compileopts.LoadTarget(&options)
+	if err != nil {
+		t.Fatal("could not load target:", err)
+	}
+	config := &compileopts.Config{
+		Options: &options,
+		Target:  target,
+	}
+	result, err := Build(pkgName, "", t.TempDir(), config)
+	if err != nil {
+		t.Fatal("could not build:", err)
+	}
+	return result
+}
@@ -1,44 +1,191 @@
 package builder

 import (
+	"bytes"
+	"fmt"
+	"go/scanner"
+	"go/token"
 	"os"
 	"os/exec"
-
-	"github.com/tinygo-org/tinygo/goenv"
+	"regexp"
+	"strconv"
+	"strings"
 )

 // runCCompiler invokes a C compiler with the given arguments.
 func runCCompiler(flags ...string) error {
+	// Find the right command to run Clang.
+	var cmd *exec.Cmd
 	if hasBuiltinTools {
 		// Compile this with the internal Clang compiler.
-		cmd := exec.Command(os.Args[0], append([]string{"clang"}, flags...)...)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		return cmd.Run()
+		cmd = exec.Command(os.Args[0], append([]string{"clang"}, flags...)...)
+	} else {
+		// Compile this with an external invocation of the Clang compiler.
+		name, err := LookupCommand("clang")
+		if err != nil {
+			return err
+		}
+		cmd = exec.Command(name, flags...)
 	}

-	// Compile this with an external invocation of the Clang compiler.
-	return execCommand("clang", flags...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	// Make sure the command doesn't use any environmental variables.
+	// Most importantly, it should not use C_INCLUDE_PATH and the like.
+	cmd.Env = []string{}
+
+	// Let some environment variables through. One important one is the
+	// temporary directory, especially on Windows it looks like Clang breaks if
+	// the temporary directory has not been set.
+	// See: https://github.com/tinygo-org/tinygo/issues/4557
+	// Also see: https://github.com/llvm/llvm-project/blob/release/18.x/llvm/lib/Support/Unix/Path.inc#L1435
+	for _, env := range os.Environ() {
+		// We could parse the key and look it up in a map, but since there are
+		// only a few keys iterating through them is easier and maybe even
+		// faster.
+		for _, prefix := range []string{"TMPDIR=", "TMP=", "TEMP=", "TEMPDIR="} {
+			if strings.HasPrefix(env, prefix) {
+				cmd.Env = append(cmd.Env, env)
+				break
+			}
+		}
+	}
+
+	return cmd.Run()
 }

 // link invokes a linker with the given name and flags.
 func link(linker string, flags ...string) error {
-	if hasBuiltinTools && (linker == "ld.lld" || linker == "wasm-ld") {
-		// Run command with internal linker.
-		cmd := exec.Command(os.Args[0], append([]string{linker}, flags...)...)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		return cmd.Run()
+	// We only support LLD.
+	if linker != "ld.lld" && linker != "wasm-ld" {
+		return fmt.Errorf("unexpected: linker %s should be ld.lld or wasm-ld", linker)
 	}

-	// Fall back to external command.
-	if _, ok := commands[linker]; ok {
-		return execCommand(linker, flags...)
+	var cmd *exec.Cmd
+	if hasBuiltinTools {
+		cmd = exec.Command(os.Args[0], append([]string{linker}, flags...)...)
+	} else {
+		name, err := LookupCommand(linker)
+		if err != nil {
+			return err
+		}
+		cmd = exec.Command(name, flags...)
 	}
-
-	cmd := exec.Command(linker, flags...)
+	var buf bytes.Buffer
 	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Dir = goenv.Get("TINYGOROOT")
-	return cmd.Run()
+	cmd.Stderr = &buf
+	err := cmd.Run()
+	if err != nil {
+		if buf.Len() == 0 {
+			// The linker failed but there was no output.
+			// Therefore, show some output anyway.
+			return fmt.Errorf("failed to run linker: %w", err)
+		}
+		return parseLLDErrors(buf.String())
+	}
+	return nil
+}
+
+// Split LLD errors into individual erros (including errors that continue on the
+// next line, using a ">>>" prefix). If possible, replace the raw errors with a
+// more user-friendly version (and one that's more in a Go style).
+func parseLLDErrors(text string) error {
+	// Split linker output in separate error messages.
+	lines := strings.Split(text, "\n")
+	var errorLines []string // one or more line (belonging to a single error) per line
+	for _, line := range lines {
+		line = strings.TrimRight(line, "\r") // needed for Windows
+		if len(errorLines) != 0 && strings.HasPrefix(line, ">>> ") {
+			errorLines[len(errorLines)-1] += "\n" + line
+			continue
+		}
+		if line == "" {
+			continue
+		}
+		errorLines = append(errorLines, line)
+	}
+
+	// Parse error messages.
+	var linkErrors []error
+	var flashOverflow, ramOverflow uint64
+	for _, message := range errorLines {
+		parsedError := false
+
+		// Check for undefined symbols.
+		// This can happen in some cases like with CGo and //go:linkname tricker.
+		if matches := regexp.MustCompile(`^ld.lld: error: undefined symbol: (.*)\n`).FindStringSubmatch(message); matches != nil {
+			symbolName := matches[1]
+			for _, line := range strings.Split(message, "\n") {
+				matches := regexp.MustCompile(`referenced by .* \(((.*):([0-9]+))\)`).FindStringSubmatch(line)
+				if matches != nil {
+					parsedError = true
+					line, _ := strconv.Atoi(matches[3])
+					// TODO: detect common mistakes like -gc=none?
+					linkErrors = append(linkErrors, scanner.Error{
+						Pos: token.Position{
+							Filename: matches[2],
+							Line:     line,
+						},
+						Msg: "linker could not find symbol " + symbolName,
+					})
+				}
+			}
+		}
+
+		// Check for flash/RAM overflow.
+		if matches := regexp.MustCompile(`^ld.lld: error: section '(.*?)' will not fit in region '(.*?)': overflowed by ([0-9]+) bytes$`).FindStringSubmatch(message); matches != nil {
+			region := matches[2]
+			n, err := strconv.ParseUint(matches[3], 10, 64)
+			if err != nil {
+				// Should not happen at all (unless it overflows an uint64 for some reason).
+				continue
+			}
+
+			// Check which area overflowed.
+			// Some chips use differently named memory areas, but these are by
+			// far the most common.
+			switch region {
+			case "FLASH_TEXT":
+				if n > flashOverflow {
+					flashOverflow = n
+				}
+				parsedError = true
+			case "RAM":
+				if n > ramOverflow {
+					ramOverflow = n
+				}
+				parsedError = true
+			}
+		}
+
+		// If we couldn't parse the linker error: show the error as-is to
+		// the user.
+		if !parsedError {
+			linkErrors = append(linkErrors, LinkerError{message})
+		}
+	}
+
+	if flashOverflow > 0 {
+		linkErrors = append(linkErrors, LinkerError{
+			Msg: fmt.Sprintf("program too large for this chip (flash overflowed by %d bytes)\n\toptimization guide: https://tinygo.org/docs/guides/optimizing-binaries/", flashOverflow),
+		})
+	}
+	if ramOverflow > 0 {
+		linkErrors = append(linkErrors, LinkerError{
+			Msg: fmt.Sprintf("program uses too much static RAM on this chip (RAM overflowed by %d bytes)", ramOverflow),
+		})
+	}
+
+	return newMultiError(linkErrors, "")
+}
+
+// LLD linker error that could not be parsed or doesn't refer to a source
+// location.
+type LinkerError struct {
+	Msg string
+}
+
+func (e LinkerError) Error() string {
+	return e.Msg
 }
@@ -7,7 +7,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var WasmBuiltins = Library{
+var libWasmBuiltins = Library{
 	name: "wasmbuiltins",
 	makeHeaders: func(target, includeDir string) error {
 		if err := os.Mkdir(includeDir+"/bits", 0o777); err != nil {
@@ -18,6 +18,7 @@ import (
 	"go/scanner"
 	"go/token"
 	"path/filepath"
+	"sort"
 	"strconv"
 	"strings"

@@ -42,6 +43,7 @@ type cgoPackage struct {
 	fset            *token.FileSet
 	tokenFiles      map[string]*token.File
 	definedGlobally map[string]ast.Node
+	noescapingFuncs map[string]*noescapingFunc // #cgo noescape lines
 	anonDecls       map[interface{}]string
 	cflags          []string // CFlags from #cgo lines
 	ldflags         []string // LDFlags from #cgo lines
@@ -80,6 +82,13 @@ type bitfieldInfo struct {
 	endBit   int64 // may be 0 meaning "until the end of the field"
 }

+// Information about a #cgo noescape line in the source code.
+type noescapingFunc struct {
+	name string
+	pos  token.Pos
+	used bool // true if used somewhere in the source (for proper error reporting)
+}
+
 // cgoAliases list type aliases between Go and C, for types that are equivalent
 // in both languages. See addTypeAliases.
 var cgoAliases = map[string]string{
@@ -138,7 +147,8 @@ typedef unsigned long long  _Cgo_ulonglong;
 // first.
 // These functions will be modified to get a "C." prefix, so the source below
 // doesn't reflect the final AST.
-const generatedGoFilePrefix = `
+const generatedGoFilePrefixBase = `
+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -162,6 +172,81 @@ func __GoBytes(unsafe.Pointer, uintptr) []byte
 func GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }
+
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func __CBytes([]byte) unsafe.Pointer
+
+func CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func __get_errno_num() uintptr
+`
+
+const generatedGoFilePrefixOther = generatedGoFilePrefixBase + `
+func __get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+`
+
+// Windows uses fake errno values in the syscall package.
+// See for example: https://github.com/golang/go/issues/23468
+// TinyGo uses mingw-w64 though, which does have defined errno values. Since the
+// syscall package is the standard library one we can't change it, but we can
+// map the errno values to match the values in the syscall package.
+// Source of the errno values: lib/mingw-w64/mingw-w64-headers/crt/errno.h
+const generatedGoFilePrefixWindows = generatedGoFilePrefixBase + `
+var __errno_mapping = [...]syscall.Errno{
+	1:  syscall.EPERM,
+	2:  syscall.ENOENT,
+	3:  syscall.ESRCH,
+	4:  syscall.EINTR,
+	5:  syscall.EIO,
+	6:  syscall.ENXIO,
+	7:  syscall.E2BIG,
+	8:  syscall.ENOEXEC,
+	9:  syscall.EBADF,
+	10: syscall.ECHILD,
+	11: syscall.EAGAIN,
+	12: syscall.ENOMEM,
+	13: syscall.EACCES,
+	14: syscall.EFAULT,
+	16: syscall.EBUSY,
+	17: syscall.EEXIST,
+	18: syscall.EXDEV,
+	19: syscall.ENODEV,
+	20: syscall.ENOTDIR,
+	21: syscall.EISDIR,
+	22: syscall.EINVAL,
+	23: syscall.ENFILE,
+	24: syscall.EMFILE,
+	25: syscall.ENOTTY,
+	27: syscall.EFBIG,
+	28: syscall.ENOSPC,
+	29: syscall.ESPIPE,
+	30: syscall.EROFS,
+	31: syscall.EMLINK,
+	32: syscall.EPIPE,
+	33: syscall.EDOM,
+	34: syscall.ERANGE,
+	36: syscall.EDEADLK,
+	38: syscall.ENAMETOOLONG,
+	39: syscall.ENOLCK,
+	40: syscall.ENOSYS,
+	41: syscall.ENOTEMPTY,
+	42: syscall.EILSEQ,
+}
+
+func __get_errno() error {
+	num := C.__get_errno_num()
+	if num < uintptr(len(__errno_mapping)) {
+		if mapped := __errno_mapping[num]; mapped != 0 {
+			return mapped
+		}
+	}
+	return syscall.Errno(num)
+}
 `

 // Process extracts `import "C"` statements from the AST, parses the comment
@@ -171,7 +256,7 @@ func GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 // functions), the CFLAGS and LDFLAGS found in #cgo lines, and a map of file
 // hashes of the accessed C header files. If there is one or more error, it
 // returns these in the []error slice but still modifies the AST.
-func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cflags []string) ([]*ast.File, []string, []string, []string, map[string][]byte, []error) {
+func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cflags []string, goos string) ([]*ast.File, []string, []string, []string, map[string][]byte, []error) {
 	p := &cgoPackage{
 		packageName:     files[0].Name.Name,
 		currentDir:      dir,
@@ -179,6 +264,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		fset:            fset,
 		tokenFiles:      map[string]*token.File{},
 		definedGlobally: map[string]ast.Node{},
+		noescapingFuncs: map[string]*noescapingFunc{},
 		anonDecls:       map[interface{}]string{},
 		visitedFiles:    map[string][]byte{},
 	}
@@ -203,7 +289,12 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	// Construct a new in-memory AST for CGo declarations of this package.
 	// The first part is written as Go code that is then parsed, but more code
 	// is added later to the AST to declare functions, globals, etc.
-	goCode := "package " + files[0].Name.Name + "\n\n" + generatedGoFilePrefix
+	goCode := "package " + files[0].Name.Name + "\n\n"
+	if goos == "windows" {
+		goCode += generatedGoFilePrefixWindows
+	} else {
+		goCode += generatedGoFilePrefixOther
+	}
 	p.generated, err = parser.ParseFile(fset, dir+"/!cgo.go", goCode, parser.ParseComments)
 	if err != nil {
 		// This is always a bug in the cgo package.
@@ -218,7 +309,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		switch decl := decl.(type) {
 		case *ast.FuncDecl:
 			switch decl.Name.Name {
-			case "CString", "GoString", "GoStringN", "__GoStringN", "GoBytes", "__GoBytes":
+			case "CString", "GoString", "GoStringN", "__GoStringN", "GoBytes", "__GoBytes", "CBytes", "__CBytes", "__get_errno_num", "__get_errno", "__errno_mapping":
 				// Adjust the name to have a "C." prefix so it is correctly
 				// resolved.
 				decl.Name.Name = "C." + decl.Name.Name
@@ -337,6 +428,22 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		})
 	}

+	// Show an error when a #cgo noescape line isn't used in practice.
+	// This matches upstream Go. I think the goal is to avoid issues with
+	// misspelled function names, which seems very useful.
+	var unusedNoescapeLines []*noescapingFunc
+	for _, value := range p.noescapingFuncs {
+		if !value.used {
+			unusedNoescapeLines = append(unusedNoescapeLines, value)
+		}
+	}
+	sort.SliceStable(unusedNoescapeLines, func(i, j int) bool {
+		return unusedNoescapeLines[i].pos < unusedNoescapeLines[j].pos
+	})
+	for _, value := range unusedNoescapeLines {
+		p.addError(value.pos, fmt.Sprintf("function %#v in #cgo noescape line is not used", value.name))
+	}
+
 	// Print the newly generated in-memory AST, for debugging.
 	//ast.Print(fset, p.generated)

@@ -402,6 +509,33 @@ func (p *cgoPackage) parseCGoPreprocessorLines(text string, pos token.Pos) strin
 		}
 		text = text[:lineStart] + string(spaces) + text[lineEnd:]

+		allFields := strings.Fields(line[4:])
+		switch allFields[0] {
+		case "noescape":
+			// The code indicates that pointer parameters will not be captured
+			// by the called C function.
+			if len(allFields) < 2 {
+				p.addErrorAfter(pos, text[:lineStart], "missing function name in #cgo noescape line")
+				continue
+			}
+			if len(allFields) > 2 {
+				p.addErrorAfter(pos, text[:lineStart], "multiple function names in #cgo noescape line")
+				continue
+			}
+			name := allFields[1]
+			p.noescapingFuncs[name] = &noescapingFunc{
+				name: name,
+				pos:  pos,
+				used: false,
+			}
+			continue
+		case "nocallback":
+			// We don't do anything special when calling a C function, so there
+			// appears to be no optimization that we can do here.
+			// Accept, but ignore the parameter for compatibility.
+			continue
+		}
+
 		// Get the text before the colon in the #cgo directive.
 		colon := strings.IndexByte(line, ':')
 		if colon < 0 {
@@ -1141,7 +1275,7 @@ func (f *cgoFile) getASTDeclName(name string, found clangCursor, iscall bool) st
 	if alias := cgoAliases["C."+name]; alias != "" {
 		return alias
 	}
-	node := f.getASTDeclNode(name, found, iscall)
+	node := f.getASTDeclNode(name, found)
 	if node, ok := node.(*ast.FuncDecl); ok {
 		if !iscall {
 			return node.Name.Name + "$funcaddr"
@@ -1153,7 +1287,7 @@ func (f *cgoFile) getASTDeclName(name string, found clangCursor, iscall bool) st

 // getASTDeclNode will declare the given C AST node (if not already defined) and
 // returns it.
-func (f *cgoFile) getASTDeclNode(name string, found clangCursor, iscall bool) ast.Node {
+func (f *cgoFile) getASTDeclNode(name string, found clangCursor) ast.Node {
 	if node, ok := f.defined[name]; ok {
 		// Declaration was found in the current file, so return it immediately.
 		return node
@@ -1272,6 +1406,45 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 // separate namespace (no _Cgo_ hacks like in gc).
 func (f *cgoFile) walker(cursor *astutil.Cursor, names map[string]clangCursor) bool {
 	switch node := cursor.Node().(type) {
+	case *ast.AssignStmt:
+		// An assign statement could be something like this:
+		//
+		//   val, errno := C.some_func()
+		//
+		// Check whether it looks like that, and if so, read the errno value and
+		// return it as the second return value. The call will be transformed
+		// into something like this:
+		//
+		//   val, errno := C.some_func(), C.__get_errno()
+		if len(node.Lhs) != 2 || len(node.Rhs) != 1 {
+			return true
+		}
+		rhs, ok := node.Rhs[0].(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		fun, ok := rhs.Fun.(*ast.SelectorExpr)
+		if !ok {
+			return true
+		}
+		x, ok := fun.X.(*ast.Ident)
+		if !ok {
+			return true
+		}
+		if found, ok := names[fun.Sel.Name]; ok && x.Name == "C" {
+			// Replace "C"."some_func" into "C.somefunc".
+			rhs.Fun = &ast.Ident{
+				NamePos: x.NamePos,
+				Name:    f.getASTDeclName(fun.Sel.Name, found, true),
+			}
+			// Add the errno value as the second value in the statement.
+			node.Rhs = append(node.Rhs, &ast.CallExpr{
+				Fun: &ast.Ident{
+					NamePos: node.Lhs[1].End(),
+					Name:    "C.__get_errno",
+				},
+			})
+		}
 	case *ast.CallExpr:
 		fun, ok := node.Fun.(*ast.SelectorExpr)
 		if !ok {
@@ -56,7 +56,7 @@ func TestCGo(t *testing.T) {
 			}

 			// Process the AST with CGo.
-			cgoFiles, _, _, _, _, cgoErrors := Process([]*ast.File{f}, "testdata", "main", fset, cflags)
+			cgoFiles, _, _, _, _, cgoErrors := Process([]*ast.File{f}, "testdata", "main", fset, cflags, "linux")

 			// Check the AST for type errors.
 			var typecheckErrors []error
@@ -64,7 +64,7 @@ func TestCGo(t *testing.T) {
 				Error: func(err error) {
 					typecheckErrors = append(typecheckErrors, err)
 				},
-				Importer: simpleImporter{},
+				Importer: newSimpleImporter(),
 				Sizes:    types.SizesFor("gccgo", "arm"),
 			}
 			_, err = config.Check("", fset, append([]*ast.File{f}, cgoFiles...), nil)
@@ -202,14 +202,33 @@ func Test_cgoPackage_isEquivalentAST(t *testing.T) {
 }

 // simpleImporter implements the types.Importer interface, but only allows
-// importing the unsafe package.
+// importing the syscall and unsafe packages.
 type simpleImporter struct {
+	syscallPkg *types.Package
+}
+
+func newSimpleImporter() *simpleImporter {
+	i := &simpleImporter{}
+
+	// Implement a dummy syscall package with the Errno type.
+	i.syscallPkg = types.NewPackage("syscall", "syscall")
+	obj := types.NewTypeName(token.NoPos, i.syscallPkg, "Errno", nil)
+	named := types.NewNamed(obj, nil, nil)
+	i.syscallPkg.Scope().Insert(obj)
+	named.SetUnderlying(types.Typ[types.Uintptr])
+	sig := types.NewSignatureType(nil, nil, nil, types.NewTuple(), types.NewTuple(types.NewParam(token.NoPos, i.syscallPkg, "", types.Typ[types.String])), false)
+	named.AddMethod(types.NewFunc(token.NoPos, i.syscallPkg, "Error", sig))
+	i.syscallPkg.MarkComplete()
+
+	return i
 }

 // Import implements the Importer interface. For testing usage only: it only
 // supports importing the unsafe package.
-func (i simpleImporter) Import(path string) (*types.Package, error) {
+func (i *simpleImporter) Import(path string) (*types.Package, error) {
 	switch path {
+	case "syscall":
+		return i.syscallPkg, nil
 	case "unsafe":
 		return types.Unsafe, nil
 	default:
@@ -54,8 +54,72 @@ func init() {
 }

 // parseConst parses the given string as a C constant.
-func parseConst(pos token.Pos, fset *token.FileSet, value string) (ast.Expr, *scanner.Error) {
-	t := newTokenizer(pos, fset, value)
+func parseConst(pos token.Pos, fset *token.FileSet, value string, params []ast.Expr, callerPos token.Pos, f *cgoFile) (ast.Expr, *scanner.Error) {
+	t := newTokenizer(pos, fset, value, f)
+
+	// If params is non-nil (could be a zero length slice), this const is
+	// actually a function-call like expression from another macro.
+	// This means we have to parse a string like "(a, b) (a+b)".
+	// We do this by parsing the parameters at the start and then treating the
+	// following like a normal constant expression.
+	if params != nil {
+		// Parse opening paren.
+		if t.curToken != token.LPAREN {
+			return nil, unexpectedToken(t, token.LPAREN)
+		}
+		t.Next()
+
+		// Parse parameters (identifiers) and closing paren.
+		var paramIdents []string
+		for i := 0; ; i++ {
+			if i == 0 && t.curToken == token.RPAREN {
+				// No parameters, break early.
+				t.Next()
+				break
+			}
+
+			// Read the parameter name.
+			if t.curToken != token.IDENT {
+				return nil, unexpectedToken(t, token.IDENT)
+			}
+			paramIdents = append(paramIdents, t.curValue)
+			t.Next()
+
+			// Read the next token: either a continuation (comma) or end of list
+			// (rparen).
+			if t.curToken == token.RPAREN {
+				// End of parameter list.
+				t.Next()
+				break
+			} else if t.curToken == token.COMMA {
+				// Comma, so there will be another parameter name.
+				t.Next()
+			} else {
+				return nil, &scanner.Error{
+					Pos: t.fset.Position(t.curPos),
+					Msg: "unexpected token " + t.curToken.String() + " inside macro parameters, expected ',' or ')'",
+				}
+			}
+		}
+
+		// Report an error if there is a mismatch in parameter length.
+		// The error is reported at the location of the closing paren from the
+		// caller location.
+		if len(params) != len(paramIdents) {
+			return nil, &scanner.Error{
+				Pos: t.fset.Position(callerPos),
+				Msg: fmt.Sprintf("unexpected number of parameters: expected %d, got %d", len(paramIdents), len(params)),
+			}
+		}
+
+		// Assign values to the parameters.
+		// These parameter names are closer in 'scope' than other identifiers so
+		// will be used first when parsing an identifier.
+		for i, name := range paramIdents {
+			t.params[name] = params[i]
+		}
+	}
+
 	expr, err := parseConstExpr(t, precedenceLowest)
 	t.Next()
 	if t.curToken != token.EOF {
@@ -96,6 +160,68 @@ func parseConstExpr(t *tokenizer, precedence int) (ast.Expr, *scanner.Error) {
 }

 func parseIdent(t *tokenizer) (ast.Expr, *scanner.Error) {
+	// If the identifier is one of the parameters of this function-like macro,
+	// use the parameter value.
+	if val, ok := t.params[t.curValue]; ok {
+		return val, nil
+	}
+
+	if t.f != nil {
+		// Check whether this identifier is actually a macro "call" with
+		// parameters. In that case, we should parse the parameters and pass it
+		// on to a new invocation of parseConst.
+		if t.peekToken == token.LPAREN {
+			if cursor, ok := t.f.names[t.curValue]; ok && t.f.isFunctionLikeMacro(cursor) {
+				// We know the current and peek tokens (the peek one is the '('
+				// token). So skip ahead until the current token is the first
+				// unknown token.
+				t.Next()
+				t.Next()
+
+				// Parse the list of parameters until ')' (rparen) is found.
+				params := []ast.Expr{}
+				for i := 0; ; i++ {
+					if i == 0 && t.curToken == token.RPAREN {
+						break
+					}
+					x, err := parseConstExpr(t, precedenceLowest)
+					if err != nil {
+						return nil, err
+					}
+					params = append(params, x)
+					t.Next()
+					if t.curToken == token.COMMA {
+						t.Next()
+					} else if t.curToken == token.RPAREN {
+						break
+					} else {
+						return nil, &scanner.Error{
+							Pos: t.fset.Position(t.curPos),
+							Msg: "unexpected token " + t.curToken.String() + ", ',' or ')'",
+						}
+					}
+				}
+
+				// Evaluate the macro value and use it as the identifier value.
+				rparen := t.curPos
+				pos, text := t.f.getMacro(cursor)
+				return parseConst(pos, t.fset, text, params, rparen, t.f)
+			}
+		}
+
+		// Normally the name is something defined in the file (like another
+		// macro) which we get the declaration from using getASTDeclName.
+		// This ensures that names that are only referenced inside a macro are
+		// still getting defined.
+		if cursor, ok := t.f.names[t.curValue]; ok {
+			return &ast.Ident{
+				NamePos: t.curPos,
+				Name:    t.f.getASTDeclName(t.curValue, cursor, false),
+			}, nil
+		}
+	}
+
+	// t.f is nil during testing. This is a fallback.
 	return &ast.Ident{
 		NamePos: t.curPos,
 		Name:    "C." + t.curValue,
@@ -164,21 +290,25 @@ func unexpectedToken(t *tokenizer, expected token.Token) *scanner.Error {

 // tokenizer reads C source code and converts it to Go tokens.
 type tokenizer struct {
+	f                   *cgoFile
 	curPos, peekPos     token.Pos
 	fset                *token.FileSet
 	curToken, peekToken token.Token
 	curValue, peekValue string
 	buf                 string
+	params              map[string]ast.Expr
 }

 // newTokenizer initializes a new tokenizer, positioned at the first token in
 // the string.
-func newTokenizer(start token.Pos, fset *token.FileSet, buf string) *tokenizer {
+func newTokenizer(start token.Pos, fset *token.FileSet, buf string, f *cgoFile) *tokenizer {
 	t := &tokenizer{
+		f:         f,
 		peekPos:   start,
 		fset:      fset,
 		buf:       buf,
 		peekToken: token.ILLEGAL,
+		params:    make(map[string]ast.Expr),
 	}
 	// Parse the first two tokens (cur and peek).
 	t.Next()
@@ -230,7 +360,7 @@ func (t *tokenizer) Next() {
 			t.peekValue = t.buf[:2]
 			t.buf = t.buf[2:]
 			return
-		case c == '(' || c == ')' || c == '+' || c == '-' || c == '*' || c == '/' || c == '%' || c == '&' || c == '|' || c == '^':
+		case c == '(' || c == ')' || c == ',' || c == '+' || c == '-' || c == '*' || c == '/' || c == '%' || c == '&' || c == '|' || c == '^':
 			// Single-character tokens.
 			// TODO: ++ (increment) and -- (decrement) operators.
 			switch c {
@@ -238,6 +368,8 @@ func (t *tokenizer) Next() {
 				t.peekToken = token.LPAREN
 			case ')':
 				t.peekToken = token.RPAREN
+			case ',':
+				t.peekToken = token.COMMA
 			case '+':
 				t.peekToken = token.ADD
 			case '-':
@@ -59,7 +59,7 @@ func TestParseConst(t *testing.T) {
 	} {
 		fset := token.NewFileSet()
 		startPos := fset.AddFile("", -1, 1000).Pos(0)
-		expr, err := parseConst(startPos, fset, tc.C)
+		expr, err := parseConst(startPos, fset, tc.C, nil, token.NoPos, nil)
 		s := "<invalid>"
 		if err != nil {
 			if !strings.HasPrefix(tc.Go, "error: ") {
@@ -63,10 +63,24 @@ long long tinygo_clang_getEnumConstantDeclValue(GoCXCursor c);
 CXType tinygo_clang_getEnumDeclIntegerType(GoCXCursor c);
 unsigned tinygo_clang_Cursor_isAnonymous(GoCXCursor c);
 unsigned tinygo_clang_Cursor_isBitField(GoCXCursor c);
+unsigned tinygo_clang_Cursor_isMacroFunctionLike(GoCXCursor c);

+// Fix some warnings on Windows ARM. Without the __declspec(dllexport), it gives warnings like this:
+//     In file included from _cgo_export.c:4:
+//     cgo-gcc-export-header-prolog:49:34: warning: redeclaration of 'tinygo_clang_globals_visitor' should not add 'dllexport' attribute [-Wdll-attribute-on-redeclaration]
+//     libclang.go:68:5: note: previous declaration is here
+// See: https://github.com/golang/go/issues/49721
+#if defined(_WIN32)
+#define CGO_DECL // __declspec(dllexport)
+#else
+#define CGO_DECL
+#endif
+
+CGO_DECL
 int tinygo_clang_globals_visitor(GoCXCursor c, GoCXCursor parent, CXClientData client_data);
+CGO_DECL
 int tinygo_clang_struct_visitor(GoCXCursor c, GoCXCursor parent, CXClientData client_data);
-int tinygo_clang_enum_visitor(GoCXCursor c, GoCXCursor parent, CXClientData client_data);
+CGO_DECL
 void tinygo_clang_inclusion_visitor(CXFile included_file, CXSourceLocation *inclusion_stack, unsigned include_len, CXClientData client_data);
 */
 import "C"
@@ -255,10 +269,18 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 				},
 			},
 		}
+		var doc []string
 		if C.clang_isFunctionTypeVariadic(cursorType) != 0 {
+			doc = append(doc, "//go:variadic")
+		}
+		if _, ok := f.noescapingFuncs[name]; ok {
+			doc = append(doc, "//go:noescape")
+			f.noescapingFuncs[name].used = true
+		}
+		if len(doc) != 0 {
 			decl.Doc.List = append(decl.Doc.List, &ast.Comment{
 				Slash: pos - 1,
-				Text:  "//go:variadic",
+				Text:  strings.Join(doc, "\n"),
 			})
 		}
 		for i := 0; i < numArgs; i++ {
@@ -370,45 +392,8 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		gen.Specs = append(gen.Specs, valueSpec)
 		return gen, nil
 	case C.CXCursor_MacroDefinition:
-		// Extract tokens from the Clang tokenizer.
-		// See: https://stackoverflow.com/a/19074846/559350
-		sourceRange := C.tinygo_clang_getCursorExtent(c)
-		tu := C.tinygo_clang_Cursor_getTranslationUnit(c)
-		var rawTokens *C.CXToken
-		var numTokens C.unsigned
-		C.clang_tokenize(tu, sourceRange, &rawTokens, &numTokens)
-		tokens := unsafe.Slice(rawTokens, numTokens)
-		// Convert this range of tokens back to source text.
-		// Ugly, but it works well enough.
-		sourceBuf := &bytes.Buffer{}
-		var startOffset int
-		for i, token := range tokens {
-			spelling := getString(C.clang_getTokenSpelling(tu, token))
-			location := C.clang_getTokenLocation(tu, token)
-			var tokenOffset C.unsigned
-			C.clang_getExpansionLocation(location, nil, nil, nil, &tokenOffset)
-			if i == 0 {
-				// The first token is the macro name itself.
-				// Skip it (after using its location).
-				startOffset = int(tokenOffset) + len(name)
-			} else {
-				// Later tokens are the macro contents.
-				for int(tokenOffset) > (startOffset + sourceBuf.Len()) {
-					// Pad the source text with whitespace (that must have been
-					// present in the original source as well).
-					sourceBuf.WriteByte(' ')
-				}
-				sourceBuf.WriteString(spelling)
-			}
-		}
-		C.clang_disposeTokens(tu, rawTokens, numTokens)
-		value := sourceBuf.String()
-		// Try to convert this #define into a Go constant expression.
-		tokenPos := token.NoPos
-		if pos != token.NoPos {
-			tokenPos = pos + token.Pos(len(name))
-		}
-		expr, scannerError := parseConst(tokenPos, f.fset, value)
+		tokenPos, value := f.getMacro(c)
+		expr, scannerError := parseConst(tokenPos, f.fset, value, nil, token.NoPos, f)
 		if scannerError != nil {
 			f.errors = append(f.errors, *scannerError)
 			return nil, nil
@@ -488,6 +473,62 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 	}
 }

+// Return whether this is a macro that's also function-like, like this:
+//
+//	#define add(a, b) (a+b)
+func (f *cgoFile) isFunctionLikeMacro(c clangCursor) bool {
+	if C.tinygo_clang_getCursorKind(c) != C.CXCursor_MacroDefinition {
+		return false
+	}
+	return C.tinygo_clang_Cursor_isMacroFunctionLike(c) != 0
+}
+
+// Get the macro value: the position in the source file and the string value of
+// the macro.
+func (f *cgoFile) getMacro(c clangCursor) (pos token.Pos, value string) {
+	// Extract tokens from the Clang tokenizer.
+	// See: https://stackoverflow.com/a/19074846/559350
+	sourceRange := C.tinygo_clang_getCursorExtent(c)
+	tu := C.tinygo_clang_Cursor_getTranslationUnit(c)
+	var rawTokens *C.CXToken
+	var numTokens C.unsigned
+	C.clang_tokenize(tu, sourceRange, &rawTokens, &numTokens)
+	tokens := unsafe.Slice(rawTokens, numTokens)
+	defer C.clang_disposeTokens(tu, rawTokens, numTokens)
+
+	// Convert this range of tokens back to source text.
+	// Ugly, but it works well enough.
+	sourceBuf := &bytes.Buffer{}
+	var startOffset int
+	for i, token := range tokens {
+		spelling := getString(C.clang_getTokenSpelling(tu, token))
+		location := C.clang_getTokenLocation(tu, token)
+		var tokenOffset C.unsigned
+		C.clang_getExpansionLocation(location, nil, nil, nil, &tokenOffset)
+		if i == 0 {
+			// The first token is the macro name itself.
+			// Skip it (after using its location).
+			startOffset = int(tokenOffset)
+		} else {
+			// Later tokens are the macro contents.
+			for int(tokenOffset) > (startOffset + sourceBuf.Len()) {
+				// Pad the source text with whitespace (that must have been
+				// present in the original source as well).
+				sourceBuf.WriteByte(' ')
+			}
+			sourceBuf.WriteString(spelling)
+		}
+	}
+	value = sourceBuf.String()
+
+	// Obtain the position of this token. This is the position of the first
+	// character in the 'value' string and is used to report errors at the
+	// correct location in the source file.
+	pos = f.getCursorPosition(c)
+
+	return
+}
+
 func getString(clangString C.CXString) (s string) {
 	rawString := C.clang_getCString(clangString)
 	s = C.GoString(rawString)
@@ -84,3 +84,7 @@ unsigned tinygo_clang_Cursor_isAnonymous(CXCursor c) {
 unsigned tinygo_clang_Cursor_isBitField(CXCursor c) {
 	return clang_Cursor_isBitField(c);
 }
+
+unsigned tinygo_clang_Cursor_isMacroFunctionLike(CXCursor c) {
+	return clang_Cursor_isMacroFunctionLike(c);
+}
@@ -1,5 +1,6 @@
 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -24,6 +25,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -3,10 +3,26 @@ package main
 /*
 #define foo 3
 #define bar foo
+
+#define unreferenced 4
+#define referenced unreferenced
+
+#define fnlike() 5
+#define fnlike_val fnlike()
+#define square(n) (n*n)
+#define square_val square(20)
+#define add(a, b) (a + b)
+#define add_val add(3, 5)
 */
 import "C"

 const (
 	Foo = C.foo
 	Bar = C.bar
+
+	Baz = C.referenced
+
+	fnlike = C.fnlike_val
+	square = C.square_val
+	add    = C.add_val
 )
@@ -1,5 +1,6 @@
 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -24,6 +25,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -40,3 +55,8 @@ type (

 const C.foo = 3
 const C.bar = C.foo
+const C.unreferenced = 4
+const C.referenced = C.unreferenced
+const C.fnlike_val = 5
+const C.square_val = (20 * 20)
+const C.add_val = (3 + 5)
@@ -10,6 +10,11 @@ typedef struct {

 typedef someType noType; // undefined type

+// Some invalid noescape lines
+#cgo noescape
+#cgo noescape foo bar
+#cgo noescape unusedFunction
+
 #define SOME_CONST_1 5) // invalid const syntax
 #define SOME_CONST_2 6) // const not used (so no error)
 #define SOME_CONST_3 1234 // const too large for byte
@@ -26,6 +31,11 @@ import "C"
 // #warning another warning
 import "C"

+// #define add(a, b) (a+b)
+// #define add_toomuch add(1, 2, 3)
+// #define add_toolittle add(1)
+import "C"
+
 // Make sure that errors for the following lines won't change with future
 // additions to the CGo preamble.
 //
@@ -51,4 +61,7 @@ var (
 	// constants passed by a command line parameter
 	_ = C.SOME_PARAM_CONST_invalid
 	_ = C.SOME_PARAM_CONST_valid
+
+	_ = C.add_toomuch
+	_ = C.add_toolittle
 )
@@ -1,12 +1,17 @@
 // CGo errors:
+//     testdata/errors.go:14:1: missing function name in #cgo noescape line
+//     testdata/errors.go:15:1: multiple function names in #cgo noescape line
 //     testdata/errors.go:4:2: warning: some warning
 //     testdata/errors.go:11:9: error: unknown type name 'someType'
-//     testdata/errors.go:26:5: warning: another warning
-//     testdata/errors.go:13:23: unexpected token ), expected end of expression
-//     testdata/errors.go:21:26: unexpected token ), expected end of expression
-//     testdata/errors.go:16:33: unexpected token ), expected end of expression
-//     testdata/errors.go:17:34: unexpected token ), expected end of expression
+//     testdata/errors.go:31:5: warning: another warning
+//     testdata/errors.go:18:23: unexpected token ), expected end of expression
+//     testdata/errors.go:26:26: unexpected token ), expected end of expression
+//     testdata/errors.go:21:33: unexpected token ), expected end of expression
+//     testdata/errors.go:22:34: unexpected token ), expected end of expression
 //     -: unexpected token INT, expected end of expression
+//     testdata/errors.go:35:35: unexpected number of parameters: expected 2, got 3
+//     testdata/errors.go:36:31: unexpected number of parameters: expected 2, got 1
+//     testdata/errors.go:3:1: function "unusedFunction" in #cgo noescape line is not used

 // Type checking errors after CGo processing:
 //     testdata/errors.go:102: cannot use 2 << 10 (untyped int constant 2048) as C.char value in variable declaration (overflows)
@@ -17,9 +22,12 @@
 //     testdata/errors.go:114: undefined: C.SOME_CONST_b
 //     testdata/errors.go:116: undefined: C.SOME_CONST_startspace
 //     testdata/errors.go:119: undefined: C.SOME_PARAM_CONST_invalid
+//     testdata/errors.go:122: undefined: C.add_toomuch
+//     testdata/errors.go:123: undefined: C.add_toolittle

 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -44,6 +52,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -5,6 +5,7 @@

 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -29,6 +30,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -9,6 +9,10 @@ static void staticfunc(int x);

 // Global variable signatures.
 extern int someValue;
+
+void notEscapingFunction(int *a);
+
+#cgo noescape notEscapingFunction
 */
 import "C"

@@ -18,6 +22,7 @@ func accessFunctions() {
 	C.variadic0()
 	C.variadic2(3, 5)
 	C.staticfunc(3)
+	C.notEscapingFunction(nil)
 }

 func accessGlobals() {
@@ -1,5 +1,6 @@
 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -24,6 +25,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -60,5 +75,10 @@ func C.staticfunc!symbols.go(x C.int)

 var C.staticfunc!symbols.go$funcaddr unsafe.Pointer

+//export notEscapingFunction
+//go:noescape
+func C.notEscapingFunction(a *C.int)
+
+var C.notEscapingFunction$funcaddr unsafe.Pointer
 //go:extern someValue
 var C.someValue C.int
@@ -1,5 +1,6 @@
 package main

+import "syscall"
 import "unsafe"

 var _ unsafe.Pointer
@@ -24,6 +25,20 @@ func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 	return C.__GoBytes(ptr, uintptr(length))
 }

+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
+
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
+}
+
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
+
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
+}
+
 type (
 	C.char      uint8
 	C.schar     int8
@@ -33,6 +33,17 @@ func (c *Config) CPU() string {
 	return c.Target.CPU
 }

+// The current build mode (like the `-buildmode` command line flag).
+func (c *Config) BuildMode() string {
+	if c.Options.BuildMode != "" {
+		return c.Options.BuildMode
+	}
+	if c.Target.BuildMode != "" {
+		return c.Target.BuildMode
+	}
+	return "default"
+}
+
 // Features returns a list of features this CPU supports. For example, for a
 // RISC-V processor, that could be "+a,+c,+m". For many targets, an empty list
 // will be returned.
@@ -60,7 +71,7 @@ func (c *Config) GOOS() string {
 }

 // GOARCH returns the GOARCH of the target. This might not always be the actual
-// archtecture: for example, the AVR target is not supported by the Go standard
+// architecture: for example, the AVR target is not supported by the Go standard
 // library so such targets will usually pretend to be linux/arm.
 func (c *Config) GOARCH() string {
 	return c.Target.GOARCH
@@ -72,12 +83,19 @@ func (c *Config) GOARM() string {
 	return c.Options.GOARM
 }

+// GOMIPS will return the GOMIPS environment variable given to the compiler when
+// building a program.
+func (c *Config) GOMIPS() string {
+	return c.Options.GOMIPS
+}
+
 // BuildTags returns the complete list of build tags used during this build.
 func (c *Config) BuildTags() []string {
 	tags := append([]string(nil), c.Target.BuildTags...) // copy slice (avoid a race)
 	tags = append(tags, []string{
 		"tinygo",                                     // that's the compiler
 		"purego",                                     // to get various crypto packages to work
+		"osusergo",                                   // to get os/user to work
 		"math_big_pure_go",                           // to get math/big to work
 		"gc." + c.GC(), "scheduler." + c.Scheduler(), // used inside the runtime package
 		"serial." + c.Serial()}...) // used inside the machine package
@@ -207,10 +225,13 @@ func (c *Config) RP2040BootPatch() bool {
 	return false
 }

-// MuslArchitecture returns the architecture name as used in musl libc. It is
-// usually the same as the first part of the LLVM triple, but not always.
-func MuslArchitecture(triple string) string {
+// Return a canonicalized architecture name, so we don't have to deal with arm*
+// vs thumb* vs arm64.
+func CanonicalArchName(triple string) string {
 	arch := strings.Split(triple, "-")[0]
+	if arch == "arm64" {
+		return "aarch64"
+	}
 	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
 		return "arm"
 	}
@@ -220,6 +241,12 @@ func MuslArchitecture(triple string) string {
 	return arch
 }

+// MuslArchitecture returns the architecture name as used in musl libc. It is
+// usually the same as the first part of the LLVM triple, but not always.
+func MuslArchitecture(triple string) string {
+	return CanonicalArchName(triple)
+}
+
 // LibcPath returns the path to the libc directory. The libc path will be either
 // a precompiled libc shipped with a TinyGo build, or a libc path in the cache
 // directory (which might not yet be built).
@@ -231,6 +258,9 @@ func (c *Config) LibcPath(name string) (path string, precompiled bool) {
 	if c.ABI() != "" {
 		archname += "-" + c.ABI()
 	}
+	if c.Target.SoftFloat {
+		archname += "-softfloat"
+	}

 	// Try to load a precompiled library.
 	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
@@ -301,6 +331,7 @@ func (c *Config) CFlags(libclang bool) []string {
 			"-isystem", filepath.Join(path, "include"),
 			"-isystem", filepath.Join(picolibcDir, "include"),
 			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
+			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
 		)
 	case "musl":
 		root := goenv.Get("TINYGOROOT")
@@ -310,6 +341,7 @@ func (c *Config) CFlags(libclang bool) []string {
 			"-nostdlibinc",
 			"-isystem", filepath.Join(path, "include"),
 			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
+			"-isystem", filepath.Join(root, "lib", "musl", "arch", "generic"),
 			"-isystem", filepath.Join(root, "lib", "musl", "include"),
 		)
 	case "wasi-libc":
@@ -376,6 +408,8 @@ func (c *Config) LDFlags() []string {
 	if c.Target.LinkerScript != "" {
 		ldflags = append(ldflags, "-T", c.Target.LinkerScript)
 	}
+	ldflags = append(ldflags, c.Options.ExtLDFlags...)
+
 	return ldflags
 }

@@ -443,7 +477,7 @@ func (c *Config) BinaryFormat(ext string) string {

 // Programmer returns the flash method and OpenOCD interface name given a
 // particular configuration. It may either be all configured in the target JSON
-// file or be modified using the -programmmer command-line option.
+// file or be modified using the -programmer command-line option.
 func (c *Config) Programmer() (method, openocdInterface string) {
 	switch c.Options.Programmer {
 	case "":
@@ -8,10 +8,11 @@ import (
 )

 var (
+	validBuildModeOptions     = []string{"default", "c-shared"}
 	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise"}
 	validSchedulerOptions     = []string{"none", "tasks", "asyncify"}
 	validSerialOptions        = []string{"none", "uart", "usb", "rtt"}
-	validPrintSizeOptions     = []string{"none", "short", "full"}
+	validPrintSizeOptions     = []string{"none", "short", "full", "html"}
 	validPanicStrategyOptions = []string{"print", "trap"}
 	validOptOptions           = []string{"none", "0", "1", "2", "s", "z"}
 )
@@ -23,8 +24,10 @@ type Options struct {
 	GOOS            string // environment variable
 	GOARCH          string // environment variable
 	GOARM           string // environment variable (only used with GOARCH=arm)
+	GOMIPS          string // environment variable (only used with GOARCH=mips and GOARCH=mipsle)
 	Directory       string // working dir, leave it unset to use the current working dir
 	Target          string
+	BuildMode       string // -buildmode flag
 	Opt             string
 	GC              string
 	PanicStrategy   string
@@ -55,10 +58,19 @@ type Options struct {
 	Timeout         time.Duration
 	WITPackage      string // pass through to wasm-tools component embed invocation
 	WITWorld        string // pass through to wasm-tools component embed -w option
+	ExtLDFlags      []string
 }

 // Verify performs a validation on the given options, raising an error if options are not valid.
 func (o *Options) Verify() error {
+	if o.BuildMode != "" {
+		valid := isInArray(validBuildModeOptions, o.BuildMode)
+		if !valid {
+			return fmt.Errorf(`invalid buildmode option '%s': valid values are %s`,
+				o.BuildMode,
+				strings.Join(validBuildModeOptions, ", "))
+		}
+	}
 	if o.GC != "" {
 		valid := isInArray(validGCOptions, o.GC)
 		if !valid {
@@ -11,7 +11,7 @@ func TestVerifyOptions(t *testing.T) {

 	expectedGCError := errors.New(`invalid gc option 'incorrect': valid values are none, leaking, conservative, custom, precise`)
 	expectedSchedulerError := errors.New(`invalid scheduler option 'incorrect': valid values are none, tasks, asyncify`)
-	expectedPrintSizeError := errors.New(`invalid size option 'incorrect': valid values are none, short, full`)
+	expectedPrintSizeError := errors.New(`invalid size option 'incorrect': valid values are none, short, full, html`)
 	expectedPanicStrategyError := errors.New(`invalid panic option 'incorrect': valid values are print, trap`)

 	testCases := []struct {
@@ -30,7 +30,9 @@ type TargetSpec struct {
 	Features         string   `json:"features,omitempty"`
 	GOOS             string   `json:"goos,omitempty"`
 	GOARCH           string   `json:"goarch,omitempty"`
+	SoftFloat        bool     // used for non-baremetal systems (GOMIPS=softfloat etc)
 	BuildTags        []string `json:"build-tags,omitempty"`
+	BuildMode        string   `json:"buildmode,omitempty"` // default build mode (if nothing specified)
 	GC               string   `json:"gc,omitempty"`
 	Scheduler        string   `json:"scheduler,omitempty"`
 	Serial           string   `json:"serial,omitempty"` // which serial output to use (uart, usb, none)
@@ -44,6 +46,7 @@ type TargetSpec struct {
 	LinkerScript     string   `json:"linkerscript,omitempty"`
 	ExtraFiles       []string `json:"extra-files,omitempty"`
 	RP2040BootPatch  *bool    `json:"rp2040-boot-patch,omitempty"` // Patch RP2040 2nd stage bootloader checksum
+	BootPatches      []string `json:"boot-patches,omitempty"`      // Bootloader patches to be applied in the order they appear.
 	Emulator         string   `json:"emulator,omitempty"`
 	FlashCommand     string   `json:"flash-command,omitempty"`
 	GDB              []string `json:"gdb,omitempty"`
@@ -86,6 +89,10 @@ func (spec *TargetSpec) overrideProperties(child *TargetSpec) error {
 			if src.Uint() != 0 {
 				dst.Set(src)
 			}
+		case reflect.Bool:
+			if src.Bool() {
+				dst.Set(src)
+			}
 		case reflect.Ptr: // for pointers, copy if not nil
 			if !src.IsNil() {
 				dst.Set(src)
@@ -172,63 +179,7 @@ func (spec *TargetSpec) resolveInherits() error {
 // Load a target specification.
 func LoadTarget(options *Options) (*TargetSpec, error) {
 	if options.Target == "" {
-		// Configure based on GOOS/GOARCH environment variables (falling back to
-		// runtime.GOOS/runtime.GOARCH), and generate a LLVM target based on it.
-		var llvmarch string
-		switch options.GOARCH {
-		case "386":
-			llvmarch = "i386"
-		case "amd64":
-			llvmarch = "x86_64"
-		case "arm64":
-			llvmarch = "aarch64"
-		case "arm":
-			switch options.GOARM {
-			case "5":
-				llvmarch = "armv5"
-			case "6":
-				llvmarch = "armv6"
-			case "7":
-				llvmarch = "armv7"
-			default:
-				return nil, fmt.Errorf("invalid GOARM=%s, must be 5, 6, or 7", options.GOARM)
-			}
-		case "mips":
-			llvmarch = "mips"
-		case "mipsle":
-			llvmarch = "mipsel"
-		case "wasm":
-			llvmarch = "wasm32"
-		default:
-			llvmarch = options.GOARCH
-		}
-		llvmvendor := "unknown"
-		llvmos := options.GOOS
-		switch llvmos {
-		case "darwin":
-			// Use macosx* instead of darwin, otherwise darwin/arm64 will refer
-			// to iOS!
-			llvmos = "macosx10.12.0"
-			if llvmarch == "aarch64" {
-				// Looks like Apple prefers to call this architecture ARM64
-				// instead of AArch64.
-				llvmarch = "arm64"
-				llvmos = "macosx11.0.0"
-			}
-			llvmvendor = "apple"
-		case "wasip1":
-			llvmos = "wasi"
-		}
-		// Target triples (which actually have four components, but are called
-		// triples for historical reasons) have the form:
-		//   arch-vendor-os-environment
-		target := llvmarch + "-" + llvmvendor + "-" + llvmos
-		if options.GOOS == "windows" {
-			target += "-gnu"
-		} else if options.GOARCH == "arm" {
-			target += "-gnueabihf"
-		}
-		return defaultTarget(options.GOOS, options.GOARCH, target)
+		return defaultTarget(options)
 	}

 	// See whether there is a target specification for this target (e.g.
@@ -289,14 +240,13 @@ func GetTargetSpecs() (map[string]*TargetSpec, error) {
 	return maps, nil
 }

-func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
-	// No target spec available. Use the default one, useful on most systems
-	// with a regular OS.
+// Load a target from environment variables (which default to
+// runtime.GOOS/runtime.GOARCH).
+func defaultTarget(options *Options) (*TargetSpec, error) {
 	spec := TargetSpec{
-		Triple:           triple,
-		GOOS:             goos,
-		GOARCH:           goarch,
-		BuildTags:        []string{goos, goarch},
+		GOOS:             options.GOOS,
+		GOARCH:           options.GOARCH,
+		BuildTags:        []string{options.GOOS, options.GOARCH},
 		GC:               "precise",
 		Scheduler:        "tasks",
 		Linker:           "cc",
@@ -304,38 +254,109 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 		GDB:              []string{"gdb"},
 		PortReset:        "false",
 	}
-	switch goarch {
+
+	// Configure target based on GOARCH.
+	var llvmarch string
+	switch options.GOARCH {
 	case "386":
+		llvmarch = "i386"
 		spec.CPU = "pentium4"
 		spec.Features = "+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
 	case "amd64":
+		llvmarch = "x86_64"
 		spec.CPU = "x86-64"
 		spec.Features = "+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
 	case "arm":
 		spec.CPU = "generic"
 		spec.CFlags = append(spec.CFlags, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
-		switch strings.Split(triple, "-")[0] {
-		case "armv5":
-			spec.Features = "+armv5t,+strict-align,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv6":
-			spec.Features = "+armv6,+dsp,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv7":
-			spec.Features = "+armv7-a,+d32,+dsp,+fp64,+neon,+vfp2,+vfp2sp,+vfp3,+vfp3d16,+vfp3d16sp,+vfp3sp,-aes,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-sha2,-thumb-mode,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+		subarch := strings.Split(options.GOARM, ",")
+		if len(subarch) > 2 {
+			return nil, fmt.Errorf("invalid GOARM=%s, must be of form <num>,[hardfloat|softfloat]", options.GOARM)
+		}
+		archLevel := subarch[0]
+		var fpu string
+		if len(subarch) >= 2 {
+			fpu = subarch[1]
+		} else {
+			// Pick the default fpu value: softfloat for armv5 and hardfloat
+			// above that.
+			if archLevel == "5" {
+				fpu = "softfloat"
+			} else {
+				fpu = "hardfloat"
+			}
+		}
+		switch fpu {
+		case "softfloat":
+			spec.CFlags = append(spec.CFlags, "-msoft-float")
+			spec.SoftFloat = true
+		case "hardfloat":
+			// Hardware floating point support is the default everywhere except
+			// on ARMv5 where it needs to be enabled explicitly.
+			if archLevel == "5" {
+				spec.CFlags = append(spec.CFlags, "-mfpu=vfpv2")
+			}
+		default:
+			return nil, fmt.Errorf("invalid extension GOARM=%s, must be softfloat or hardfloat", options.GOARM)
+		}
+		switch archLevel {
+		case "5":
+			llvmarch = "armv5"
+			if spec.SoftFloat {
+				spec.Features = "+armv5t,+soft-float,+strict-align,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			} else {
+				spec.Features = "+armv5t,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			}
+		case "6":
+			llvmarch = "armv6"
+			if spec.SoftFloat {
+				spec.Features = "+armv6,+dsp,+soft-float,+strict-align,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			} else {
+				spec.Features = "+armv6,+dsp,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			}
+		case "7":
+			llvmarch = "armv7"
+			if spec.SoftFloat {
+				spec.Features = "+armv7-a,+dsp,+soft-float,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			} else {
+				spec.Features = "+armv7-a,+d32,+dsp,+fp64,+neon,+vfp2,+vfp2sp,+vfp3,+vfp3d16,+vfp3d16sp,+vfp3sp,-aes,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-sha2,-thumb-mode,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+			}
+		default:
+			return nil, fmt.Errorf("invalid GOARM=%s, must be of form <num>,[hardfloat|softfloat] where num is 5, 6, or 7", options.GOARM)
 		}
 	case "arm64":
 		spec.CPU = "generic"
-		if goos == "darwin" {
+		llvmarch = "aarch64"
+		if options.GOOS == "darwin" {
 			spec.Features = "+fp-armv8,+neon"
-		} else if goos == "windows" {
+			// Looks like Apple prefers to call this architecture ARM64
+			// instead of AArch64.
+			llvmarch = "arm64"
+		} else if options.GOOS == "windows" {
 			spec.Features = "+fp-armv8,+neon,-fmv"
 		} else { // linux
 			spec.Features = "+fp-armv8,+neon,-fmv,-outline-atomics"
 		}
 	case "mips", "mipsle":
-		spec.CPU = "mips32r2"
-		spec.Features = "+fpxx,+mips32r2,+nooddspreg,-noabicalls"
+		spec.CPU = "mips32"
 		spec.CFlags = append(spec.CFlags, "-fno-pic")
+		if options.GOARCH == "mips" {
+			llvmarch = "mips" // big endian
+		} else {
+			llvmarch = "mipsel" // little endian
+		}
+		switch options.GOMIPS {
+		case "hardfloat":
+			spec.Features = "+fpxx,+mips32,+nooddspreg,-noabicalls"
+		case "softfloat":
+			spec.SoftFloat = true
+			spec.Features = "+mips32,+soft-float,-noabicalls"
+			spec.CFlags = append(spec.CFlags, "-msoft-float")
+		default:
+			return nil, fmt.Errorf("invalid GOMIPS=%s: must be hardfloat or softfloat", options.GOMIPS)
+		}
 	case "wasm":
+		llvmarch = "wasm32"
 		spec.CPU = "generic"
 		spec.Features = "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext"
 		spec.BuildTags = append(spec.BuildTags, "tinygo.wasm")
@@ -344,24 +365,42 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"-mnontrapping-fptoint",
 			"-msign-ext",
 		)
+	default:
+		return nil, fmt.Errorf("unknown GOARCH=%s", options.GOARCH)
 	}
-	if goos == "darwin" {
+
+	// Configure target based on GOOS.
+	llvmos := options.GOOS
+	llvmvendor := "unknown"
+	switch options.GOOS {
+	case "darwin":
+		platformVersion := "10.12.0"
+		if options.GOARCH == "arm64" {
+			platformVersion = "11.0.0" // first macosx platform with arm64 support
+		}
+		llvmvendor = "apple"
 		spec.Linker = "ld.lld"
 		spec.Libc = "darwin-libSystem"
-		arch := strings.Split(triple, "-")[0]
-		platformVersion := strings.TrimPrefix(strings.Split(triple, "-")[2], "macosx")
+		// Use macosx* instead of darwin, otherwise darwin/arm64 will refer to
+		// iOS!
+		llvmos = "macosx" + platformVersion
 		spec.LDFlags = append(spec.LDFlags,
 			"-flavor", "darwin",
 			"-dead_strip",
-			"-arch", arch,
+			"-arch", llvmarch,
 			"-platform_version", "macos", platformVersion, platformVersion,
 		)
-	} else if goos == "linux" {
+		spec.ExtraFiles = append(spec.ExtraFiles,
+			"src/internal/futex/futex_darwin.c",
+			"src/runtime/os_darwin.c",
+			"src/runtime/runtime_unix.c",
+			"src/runtime/signal.c")
+	case "linux":
 		spec.Linker = "ld.lld"
 		spec.RTLib = "compiler-rt"
 		spec.Libc = "musl"
 		spec.LDFlags = append(spec.LDFlags, "--gc-sections")
-		if goarch == "arm64" {
+		if options.GOARCH == "arm64" {
 			// Disable outline atomics. For details, see:
 			// https://cpufun.substack.com/p/atomics-in-aarch64
 			// A better way would be to fully support outline atomics, which
@@ -375,7 +414,11 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			// proper threading.
 			spec.CFlags = append(spec.CFlags, "-mno-outline-atomics")
 		}
-	} else if goos == "windows" {
+		spec.ExtraFiles = append(spec.ExtraFiles,
+			"src/internal/futex/futex_linux.c",
+			"src/runtime/runtime_unix.c",
+			"src/runtime/signal.c")
+	case "windows":
 		spec.Linker = "ld.lld"
 		spec.Libc = "mingw-w64"
 		// Note: using a medium code model, low image base and no ASLR
@@ -384,7 +427,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 		// normally present in Go (without explicitly opting in).
 		// For more discussion:
 		// https://groups.google.com/g/Golang-nuts/c/Jd9tlNc6jUE/m/Zo-7zIP_m3MJ?pli=1
-		switch goarch {
+		switch options.GOARCH {
 		case "amd64":
 			spec.LDFlags = append(spec.LDFlags,
 				"-m", "i386pep",
@@ -401,7 +444,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	} else if goos == "wasip1" {
+	case "wasip1":
 		spec.GC = "" // use default GC
 		spec.Scheduler = "asyncify"
 		spec.Linker = "wasm-ld"
@@ -412,33 +455,55 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"--stack-first",
 			"--no-demangle",
 		)
-		spec.Emulator = "wasmtime --dir={tmpDir}::/tmp {}"
+		spec.Emulator = "wasmtime run --dir={tmpDir}::/tmp {}"
 		spec.ExtraFiles = append(spec.ExtraFiles,
 			"src/runtime/asm_tinygowasm.S",
 			"src/internal/task/task_asyncify_wasm.S",
 		)
-	} else {
-		spec.LDFlags = append(spec.LDFlags, "-no-pie", "-Wl,--gc-sections") // WARNING: clang < 5.0 requires -nopie
+		llvmos = "wasi"
+	default:
+		return nil, fmt.Errorf("unknown GOOS=%s", options.GOOS)
 	}
-	if goarch != "wasm" {
+
+	// Target triples (which actually have four components, but are called
+	// triples for historical reasons) have the form:
+	//   arch-vendor-os-environment
+	spec.Triple = llvmarch + "-" + llvmvendor + "-" + llvmos
+	if options.GOOS == "windows" {
+		spec.Triple += "-gnu"
+	} else if options.GOOS == "linux" {
+		// We use musl on Linux (not glibc) so we should use -musleabi* instead
+		// of -gnueabi*.
+		// The *hf suffix selects between soft/hard floating point ABI.
+		if spec.SoftFloat {
+			spec.Triple += "-musleabi"
+		} else {
+			spec.Triple += "-musleabihf"
+		}
+	}
+
+	// Add extra assembly files (needed for the scheduler etc).
+	if options.GOARCH != "wasm" {
 		suffix := ""
-		if goos == "windows" && goarch == "amd64" {
+		if options.GOOS == "windows" && options.GOARCH == "amd64" {
 			// Windows uses a different calling convention on amd64 from other
 			// operating systems so we need separate assembly files.
 			suffix = "_windows"
 		}
-		asmGoarch := goarch
-		if goarch == "mips" || goarch == "mipsle" {
+		asmGoarch := options.GOARCH
+		if options.GOARCH == "mips" || options.GOARCH == "mipsle" {
 			asmGoarch = "mipsx"
 		}
 		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/asm_"+asmGoarch+suffix+".S")
 		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_stack_"+asmGoarch+suffix+".S")
 	}
-	if goarch != runtime.GOARCH {
+
+	// Configure the emulator.
+	if options.GOARCH != runtime.GOARCH {
 		// Some educated guesses as to how to invoke helper programs.
 		spec.GDB = []string{"gdb-multiarch"}
-		if goos == "linux" {
-			switch goarch {
+		if options.GOOS == "linux" {
+			switch options.GOARCH {
 			case "386":
 				// amd64 can _usually_ run 32-bit programs, so skip the emulator in that case.
 				if runtime.GOARCH != "amd64" {
@@ -457,11 +522,12 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			}
 		}
 	}
-	if goos != runtime.GOOS {
-		if goos == "windows" {
+	if options.GOOS != runtime.GOOS {
+		if options.GOOS == "windows" {
 			spec.Emulator = "wine {}"
 		}
 	}
+
 	return &spec, nil
 }

@@ -99,7 +99,7 @@ func (b *builder) createUnsafeSliceStringCheck(name string, ptr, len llvm.Value,
 	// However, in practice, it is also necessary to check that the length is
 	// not too big that a GEP wouldn't be possible without wrapping the pointer.
 	// These two checks (non-negative and not too big) can be merged into one
-	// using an unsiged greater than.
+	// using an unsigned greater than.

 	// Make sure the len value is at least as big as a uintptr.
 	len = b.extendInteger(len, lenType, b.uintptrType)
@@ -15,6 +15,16 @@ func (b *builder) createAtomicOp(name string) llvm.Value {
 		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpAdd, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
 		// Return the new value, not the original value returned by atomicrmw.
 		return b.CreateAdd(oldVal, val, "")
+	case "AndInt32", "AndInt64", "AndUint32", "AndUint64", "AndUintptr":
+		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
+		val := b.getValue(b.fn.Params[1], getPos(b.fn))
+		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpAnd, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
+		return oldVal
+	case "OrInt32", "OrInt64", "OrUint32", "OrUint64", "OrUintptr":
+		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
+		val := b.getValue(b.fn.Params[1], getPos(b.fn))
+		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpOr, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
+		return oldVal
 	case "SwapInt32", "SwapInt64", "SwapUint32", "SwapUint64", "SwapUintptr", "SwapPointer":
 		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
 		val := b.getValue(b.fn.Params[1], getPos(b.fn))
@@ -19,8 +19,9 @@ const maxFieldsPerParam = 3
 // useful while declaring or defining a function.
 type paramInfo struct {
 	llvmType llvm.Type
-	name     string // name, possibly with suffixes for e.g. struct fields
-	elemSize uint64 // size of pointer element type, or 0 if this isn't a pointer
+	name     string     // name, possibly with suffixes for e.g. struct fields
+	elemSize uint64     // size of pointer element type, or 0 if this isn't a pointer
+	flags    paramFlags // extra flags for this parameter
 }

 // paramFlags identifies parameter attributes for flags. Most importantly, it
@@ -28,9 +29,9 @@ type paramInfo struct {
 type paramFlags uint8

 const (
-	// Parameter may have the deferenceable_or_null attribute. This attribute
-	// cannot be applied to unsafe.Pointer and to the data pointer of slices.
-	paramIsDeferenceableOrNull = 1 << iota
+	// Whether this is a full or partial Go parameter (int, slice, etc).
+	// The extra context parameter is not a Go parameter.
+	paramIsGoParam = 1 << iota
 )

 // createRuntimeCallCommon creates a runtime call. Use createRuntimeCall or
@@ -195,6 +196,7 @@ func (c *compilerContext) getParamInfo(t llvm.Type, name string, goType types.Ty
 	info := paramInfo{
 		llvmType: t,
 		name:     name,
+		flags:    paramIsGoParam,
 	}
 	if goType != nil {
 		switch underlying := goType.Underlying().(type) {
@@ -4,7 +4,9 @@ package compiler
 // or pseudo-operations that are lowered during goroutine lowering.

 import (
+	"fmt"
 	"go/types"
+	"math"

 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"golang.org/x/tools/go/ssa"
@@ -41,17 +43,17 @@ func (b *builder) createChanSend(instr *ssa.Send) {
 		b.CreateStore(chanValue, valueAlloca)
 	}

-	// Allocate blockedlist buffer.
-	channelBlockedList := b.getLLVMRuntimeType("channelBlockedList")
-	channelBlockedListAlloca, channelBlockedListAllocaSize := b.createTemporaryAlloca(channelBlockedList, "chan.blockedList")
+	// Allocate buffer for the channel operation.
+	channelOp := b.getLLVMRuntimeType("channelOp")
+	channelOpAlloca, channelOpAllocaSize := b.createTemporaryAlloca(channelOp, "chan.op")

 	// Do the send.
-	b.createRuntimeCall("chanSend", []llvm.Value{ch, valueAlloca, channelBlockedListAlloca}, "")
+	b.createRuntimeCall("chanSend", []llvm.Value{ch, valueAlloca, channelOpAlloca}, "")

 	// End the lifetime of the allocas.
 	// This also works around a bug in CoroSplit, at least in LLVM 8:
 	// https://bugs.llvm.org/show_bug.cgi?id=41742
-	b.emitLifetimeEnd(channelBlockedListAlloca, channelBlockedListAllocaSize)
+	b.emitLifetimeEnd(channelOpAlloca, channelOpAllocaSize)
 	if !isZeroSize {
 		b.emitLifetimeEnd(valueAlloca, valueAllocaSize)
 	}
@@ -72,12 +74,12 @@ func (b *builder) createChanRecv(unop *ssa.UnOp) llvm.Value {
 		valueAlloca, valueAllocaSize = b.createTemporaryAlloca(valueType, "chan.value")
 	}

-	// Allocate blockedlist buffer.
-	channelBlockedList := b.getLLVMRuntimeType("channelBlockedList")
-	channelBlockedListAlloca, channelBlockedListAllocaSize := b.createTemporaryAlloca(channelBlockedList, "chan.blockedList")
+	// Allocate buffer for the channel operation.
+	channelOp := b.getLLVMRuntimeType("channelOp")
+	channelOpAlloca, channelOpAllocaSize := b.createTemporaryAlloca(channelOp, "chan.op")

 	// Do the receive.
-	commaOk := b.createRuntimeCall("chanRecv", []llvm.Value{ch, valueAlloca, channelBlockedListAlloca}, "")
+	commaOk := b.createRuntimeCall("chanRecv", []llvm.Value{ch, valueAlloca, channelOpAlloca}, "")
 	var received llvm.Value
 	if isZeroSize {
 		received = llvm.ConstNull(valueType)
@@ -85,7 +87,7 @@ func (b *builder) createChanRecv(unop *ssa.UnOp) llvm.Value {
 		received = b.CreateLoad(valueType, valueAlloca, "chan.received")
 		b.emitLifetimeEnd(valueAlloca, valueAllocaSize)
 	}
-	b.emitLifetimeEnd(channelBlockedListAlloca, channelBlockedListAllocaSize)
+	b.emitLifetimeEnd(channelOpAlloca, channelOpAllocaSize)

 	if unop.CommaOk {
 		tuple := llvm.Undef(b.ctx.StructType([]llvm.Type{valueType, b.ctx.Int1Type()}, false))
@@ -124,6 +126,20 @@ func (b *builder) createSelect(expr *ssa.Select) llvm.Value {
 		}
 	}

+	const maxSelectStates = math.MaxUint32 >> 2
+	if len(expr.States) > maxSelectStates {
+		// The runtime code assumes that the number of state must fit in 30 bits
+		// (so the select index can be stored in a uint32 with two bits reserved
+		// for other purposes). It seems unlikely that a real program would have
+		// that many states, but we check for this case anyway to be sure.
+		// We use a uint32 (and not a uintptr or uint64) to avoid 64-bit atomic
+		// operations which aren't available everywhere.
+		b.addError(expr.Pos(), fmt.Sprintf("too many select states: got %d but the maximum supported number is %d", len(expr.States), maxSelectStates))
+
+		// Continue as usual (we'll generate broken code but the error will
+		// prevent the compilation to complete).
+	}
+
 	// This code create a (stack-allocated) slice containing all the select
 	// cases and then calls runtime.chanSelect to perform the actual select
 	// statement.
@@ -198,10 +214,10 @@ func (b *builder) createSelect(expr *ssa.Select) llvm.Value {
 	if expr.Blocking {
 		// Stack-allocate operation structures.
 		// If these were simply created as a slice, they would heap-allocate.
-		chBlockAllocaType := llvm.ArrayType(b.getLLVMRuntimeType("channelBlockedList"), len(selectStates))
-		chBlockAlloca, chBlockSize := b.createTemporaryAlloca(chBlockAllocaType, "select.block.alloca")
-		chBlockLen := llvm.ConstInt(b.uintptrType, uint64(len(selectStates)), false)
-		chBlockPtr := b.CreateGEP(chBlockAllocaType, chBlockAlloca, []llvm.Value{
+		opsAllocaType := llvm.ArrayType(b.getLLVMRuntimeType("channelOp"), len(selectStates))
+		opsAlloca, opsSize := b.createTemporaryAlloca(opsAllocaType, "select.block.alloca")
+		opsLen := llvm.ConstInt(b.uintptrType, uint64(len(selectStates)), false)
+		opsPtr := b.CreateGEP(opsAllocaType, opsAlloca, []llvm.Value{
 			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
 			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
 		}, "select.block")
@@ -209,15 +225,18 @@ func (b *builder) createSelect(expr *ssa.Select) llvm.Value {
 		results = b.createRuntimeCall("chanSelect", []llvm.Value{
 			recvbuf,
 			statesPtr, statesLen, statesLen, // []chanSelectState
-			chBlockPtr, chBlockLen, chBlockLen, // []channelBlockList
+			opsPtr, opsLen, opsLen, // []channelOp
 		}, "select.result")

 		// Terminate the lifetime of the operation structures.
-		b.emitLifetimeEnd(chBlockAlloca, chBlockSize)
+		b.emitLifetimeEnd(opsAlloca, opsSize)
 	} else {
-		results = b.createRuntimeCall("tryChanSelect", []llvm.Value{
+		opsPtr := llvm.ConstNull(b.dataPtrType)
+		opsLen := llvm.ConstInt(b.uintptrType, 0, false)
+		results = b.createRuntimeCall("chanSelect", []llvm.Value{
 			recvbuf,
 			statesPtr, statesLen, statesLen, // []chanSelectState
+			opsPtr, opsLen, opsLen, // []channelOp (nil slice)
 		}, "select.result")
 	}

@@ -17,6 +17,7 @@ import (

 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"github.com/tinygo-org/tinygo/loader"
+	"github.com/tinygo-org/tinygo/src/tinygo"
 	"golang.org/x/tools/go/ssa"
 	"golang.org/x/tools/go/types/typeutil"
 	"tinygo.org/x/go-llvm"
@@ -44,6 +45,7 @@ type Config struct {
 	ABI             string
 	GOOS            string
 	GOARCH          string
+	BuildMode       string
 	CodeModel       string
 	RelocationModel string
 	SizeLevel       int
@@ -242,7 +244,7 @@ func NewTargetMachine(config *Config) (llvm.TargetMachine, error) {
 }

 // Sizes returns a types.Sizes appropriate for the given target machine. It
-// includes the correct int size and aligment as is necessary for the Go
+// includes the correct int size and alignment as is necessary for the Go
 // typechecker.
 func Sizes(machine llvm.TargetMachine) types.Sizes {
 	targetData := machine.CreateTargetData()
@@ -1384,6 +1386,11 @@ func (b *builder) createFunction() {
 		b.llvmFn.SetLinkage(llvm.InternalLinkage)
 		b.createFunction()
 	}
+
+	// Create wrapper function that can be called externally.
+	if b.info.wasmExport != "" {
+		b.createWasmExport()
+	}
 }

 // posser is an interface that's implemented by both ssa.Value and
@@ -1674,7 +1681,12 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 			result = b.CreateSelect(cmp, result, arg, "")
 		}
 		return result, nil
+	case "panic":
+		// This is rare, but happens in "defer panic()".
+		b.createRuntimeInvoke("_panic", argValues, "")
+		return llvm.Value{}, nil
 	case "print", "println":
+		b.createRuntimeCall("printlock", nil, "")
 		for i, value := range argValues {
 			if i >= 1 && callName == "println" {
 				b.createRuntimeCall("printspace", nil, "")
@@ -1735,6 +1747,7 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 		if callName == "println" {
 			b.createRuntimeCall("printnl", nil, "")
 		}
+		b.createRuntimeCall("printunlock", nil, "")
 		return llvm.Value{}, nil // print() or println() returns void
 	case "real":
 		cplx := argValues[0]
@@ -1847,7 +1860,9 @@ func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error)
 		case strings.HasPrefix(name, "(device/riscv.CSR)."):
 			return b.emitCSROperation(instr)
 		case strings.HasPrefix(name, "syscall.Syscall") || strings.HasPrefix(name, "syscall.RawSyscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.Syscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscall"):
-			return b.createSyscall(instr)
+			if b.GOOS != "darwin" {
+				return b.createSyscall(instr)
+			}
 		case strings.HasPrefix(name, "syscall.rawSyscallNoError") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscallNoError"):
 			return b.createRawSyscallNoError(instr)
 		case name == "runtime.supportsRecover":
@@ -1857,14 +1872,18 @@ func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error)
 			}
 			return llvm.ConstInt(b.ctx.Int1Type(), supportsRecover, false), nil
 		case name == "runtime.panicStrategy":
-			// These constants are defined in src/runtime/panic.go.
 			panicStrategy := map[string]uint64{
-				"print": 1, // panicStrategyPrint
-				"trap":  2, // panicStrategyTrap
+				"print": tinygo.PanicStrategyPrint,
+				"trap":  tinygo.PanicStrategyTrap,
 			}[b.Config.PanicStrategy]
 			return llvm.ConstInt(b.ctx.Int8Type(), panicStrategy, false), nil
 		case name == "runtime/interrupt.New":
 			return b.createInterruptGlobal(instr)
+		case name == "internal/abi.FuncPCABI0":
+			retval := b.createDarwinFuncPCABI0Call(instr)
+			if !retval.IsNil() {
+				return retval, nil
+			}
 		}

 		calleeType, callee = b.getFunction(fn)
@@ -1963,7 +1982,7 @@ func (b *builder) getValue(expr ssa.Value, pos token.Pos) llvm.Value {
 			return value
 		} else {
 			// indicates a compiler bug
-			panic("local has not been parsed: " + expr.String())
+			panic("SSA value not previously found in function: " + expr.String())
 		}
 	}
 }
@@ -16,6 +16,7 @@ package compiler
 import (
 	"go/types"
 	"strconv"
+	"strings"

 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"golang.org/x/tools/go/ssa"
@@ -198,7 +199,13 @@ jal 1f
 addiu $$ra, 8
 sw $$ra, 4($$5)
 .set at`
-		constraints = "={$4},{$5},~{$1},~{$2},~{$3},~{$5},~{$6},~{$7},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$16},~{$17},~{$18},~{$19},~{$20},~{$21},~{$22},~{$23},~{$24},~{$25},~{$26},~{$27},~{$28},~{$29},~{$30},~{$31},~{$f0},~{$f1},~{$f2},~{$f3},~{$f4},~{$f5},~{$f6},~{$f7},~{$f8},~{$f9},~{$f10},~{$f11},~{$f12},~{$f13},~{$f14},~{$f15},~{$f16},~{$f17},~{$f18},~{$f19},~{$f20},~{$f21},~{$f22},~{$f23},~{$f24},~{$f25},~{$f26},~{$f27},~{$f28},~{$f29},~{$f30},~{$f31},~{memory}"
+		constraints = "={$4},{$5},~{$1},~{$2},~{$3},~{$5},~{$6},~{$7},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$16},~{$17},~{$18},~{$19},~{$20},~{$21},~{$22},~{$23},~{$24},~{$25},~{$26},~{$27},~{$28},~{$29},~{$30},~{$31},~{memory}"
+		if !strings.Contains(b.Features, "+soft-float") {
+			// Using floating point registers together with GOMIPS=softfloat
+			// results in a crash: "This value type is not natively supported!"
+			// So only add them when using hardfloat.
+			constraints += ",~{$f0},~{$f1},~{$f2},~{$f3},~{$f4},~{$f5},~{$f6},~{$f7},~{$f8},~{$f9},~{$f10},~{$f11},~{$f12},~{$f13},~{$f14},~{$f15},~{$f16},~{$f17},~{$f18},~{$f19},~{$f20},~{$f21},~{$f22},~{$f23},~{$f24},~{$f25},~{$f26},~{$f27},~{$f28},~{$f29},~{$f30},~{$f31}"
+		}
 	case "riscv32":
 		asmString = `
 la a2, 1f
@@ -78,7 +78,7 @@ func (b *builder) trackValue(value llvm.Value) {
 	}
 }

-// trackPointer creates a call to runtime.trackPointer, bitcasting the poitner
+// trackPointer creates a call to runtime.trackPointer, bitcasting the pointer
 // first if needed. The input value must be of LLVM pointer type.
 func (b *builder) trackPointer(value llvm.Value) {
 	b.createRuntimeCall("trackPointer", []llvm.Value{value, b.stackChainAlloca}, "")
@@ -7,43 +7,14 @@ import (
 	"go/token"
 	"go/types"

+	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
 )

 // createGo emits code to start a new goroutine.
 func (b *builder) createGo(instr *ssa.Go) {
-	// Get all function parameters to pass to the goroutine.
-	var params []llvm.Value
-	for _, param := range instr.Call.Args {
-		params = append(params, b.getValue(param, getPos(instr)))
-	}
-
-	var prefix string
-	var funcPtr llvm.Value
-	var funcType llvm.Type
-	hasContext := false
-	if callee := instr.Call.StaticCallee(); callee != nil {
-		// Static callee is known. This makes it easier to start a new
-		// goroutine.
-		var context llvm.Value
-		switch value := instr.Call.Value.(type) {
-		case *ssa.Function:
-			// Goroutine call is regular function call. No context is necessary.
-		case *ssa.MakeClosure:
-			// A goroutine call on a func value, but the callee is trivial to find. For
-			// example: immediately applied functions.
-			funcValue := b.getValue(value, getPos(instr))
-			context = b.extractFuncContext(funcValue)
-		default:
-			panic("StaticCallee returned an unexpected value")
-		}
-		if !context.IsNil() {
-			params = append(params, context) // context parameter
-			hasContext = true
-		}
-		funcType, funcPtr = b.getFunction(callee)
-	} else if builtin, ok := instr.Call.Value.(*ssa.Builtin); ok {
+	if builtin, ok := instr.Call.Value.(*ssa.Builtin); ok {
 		// We cheat. None of the builtins do any long or blocking operation, so
 		// we might as well run these builtins right away without the program
 		// noticing the difference.
@@ -74,6 +45,38 @@ func (b *builder) createGo(instr *ssa.Go) {
 		}
 		b.createBuiltin(argTypes, argValues, builtin.Name(), instr.Pos())
 		return
+	}
+
+	// Get all function parameters to pass to the goroutine.
+	var params []llvm.Value
+	for _, param := range instr.Call.Args {
+		params = append(params, b.expandFormalParam(b.getValue(param, getPos(instr)))...)
+	}
+
+	var prefix string
+	var funcPtr llvm.Value
+	var funcType llvm.Type
+	hasContext := false
+	if callee := instr.Call.StaticCallee(); callee != nil {
+		// Static callee is known. This makes it easier to start a new
+		// goroutine.
+		var context llvm.Value
+		switch value := instr.Call.Value.(type) {
+		case *ssa.Function:
+			// Goroutine call is regular function call. No context is necessary.
+		case *ssa.MakeClosure:
+			// A goroutine call on a func value, but the callee is trivial to find. For
+			// example: immediately applied functions.
+			funcValue := b.getValue(value, getPos(instr))
+			context = b.extractFuncContext(funcValue)
+		default:
+			panic("StaticCallee returned an unexpected value")
+		}
+		if !context.IsNil() {
+			params = append(params, context) // context parameter
+			hasContext = true
+		}
+		funcType, funcPtr = b.getFunction(callee)
 	} else if instr.Call.IsInvoke() {
 		// This is a method call on an interface value.
 		itf := b.getValue(instr.Call.Value, getPos(instr))
@@ -99,7 +102,7 @@ func (b *builder) createGo(instr *ssa.Go) {

 	paramBundle := b.emitPointerPack(params)
 	var stackSize llvm.Value
-	callee := b.createGoroutineStartWrapper(funcType, funcPtr, prefix, hasContext, instr.Pos())
+	callee := b.createGoroutineStartWrapper(funcType, funcPtr, prefix, hasContext, false, instr.Pos())
 	if b.AutomaticStackSize {
 		// The stack size is not known until after linking. Call a dummy
 		// function that will be replaced with a load from a special ELF
@@ -119,6 +122,147 @@ func (b *builder) createGo(instr *ssa.Go) {
 	b.createCall(fnType, start, []llvm.Value{callee, paramBundle, stackSize, llvm.Undef(b.dataPtrType)}, "")
 }

+// Create an exported wrapper function for functions with the //go:wasmexport
+// pragma. This wrapper function is quite complex when the scheduler is enabled:
+// it needs to start a new goroutine each time the exported function is called.
+func (b *builder) createWasmExport() {
+	pos := b.info.wasmExportPos
+	if b.info.exported {
+		// //export really shouldn't be used anymore when //go:wasmexport is
+		// available, because //go:wasmexport is much better defined.
+		b.addError(pos, "cannot use //export and //go:wasmexport at the same time")
+		return
+	}
+
+	const suffix = "#wasmexport"
+
+	// Declare the exported function.
+	paramTypes := b.llvmFnType.ParamTypes()
+	exportedFnType := llvm.FunctionType(b.llvmFnType.ReturnType(), paramTypes[:len(paramTypes)-1], false)
+	exportedFn := llvm.AddFunction(b.mod, b.fn.RelString(nil)+suffix, exportedFnType)
+	b.addStandardAttributes(exportedFn)
+	llvmutil.AppendToGlobal(b.mod, "llvm.used", exportedFn)
+	exportedFn.AddFunctionAttr(b.ctx.CreateStringAttribute("wasm-export-name", b.info.wasmExport))
+
+	// Create a builder for this wrapper function.
+	builder := newBuilder(b.compilerContext, b.ctx.NewBuilder(), b.fn)
+	defer builder.Dispose()
+
+	// Define this function as a separate function in DWARF
+	if b.Debug {
+		if b.fn.Syntax() != nil {
+			// Create debug info file if needed.
+			pos := b.program.Fset.Position(pos)
+			builder.difunc = builder.attachDebugInfoRaw(b.fn, exportedFn, suffix, pos.Filename, pos.Line)
+		}
+		builder.setDebugLocation(pos)
+	}
+
+	// Create a single basic block inside of it.
+	bb := llvm.AddBasicBlock(exportedFn, "entry")
+	builder.SetInsertPointAtEnd(bb)
+
+	// Insert an assertion to make sure this //go:wasmexport function is not
+	// called at a time when it is not allowed (for example, before the runtime
+	// is initialized).
+	builder.createRuntimeCall("wasmExportCheckRun", nil, "")
+
+	if b.Scheduler == "none" {
+		// When the scheduler has been disabled, this is really trivial: just
+		// call the function.
+		params := exportedFn.Params()
+		params = append(params, llvm.ConstNull(b.dataPtrType)) // context parameter
+		retval := builder.CreateCall(b.llvmFnType, b.llvmFn, params, "")
+		if b.fn.Signature.Results() == nil {
+			builder.CreateRetVoid()
+		} else {
+			builder.CreateRet(retval)
+		}
+
+	} else {
+		// The scheduler is enabled, so we need to start a new goroutine, wait
+		// for it to complete, and read the result value.
+
+		// Build a function that looks like this:
+		//
+		//   func foo#wasmexport(param0, param1, ..., paramN) {
+		//       var state *stateStruct
+		//
+		//       // 'done' must be explicitly initialized ('state' is not zeroed)
+		//       state.done = false
+		//
+		//       // store the parameters in the state object
+		//       state.param0 = param0
+		//       state.param1 = param1
+		//       ...
+		//       state.paramN = paramN
+		//
+		//       // create a goroutine and push it to the runqueue
+		//       task.start(uintptr(gowrapper), &state)
+		//
+		//       // run the scheduler
+		//       runtime.wasmExportRun(&state.done)
+		//
+		//       // if there is a return value, load it and return
+		//       return state.result
+		//   }
+
+		hasReturn := b.fn.Signature.Results() != nil
+
+		// Build the state struct type.
+		// It stores the function parameters, the 'done' flag, and reserves
+		// space for a return value if needed.
+		stateFields := exportedFnType.ParamTypes()
+		numParams := len(stateFields)
+		stateFields = append(stateFields, b.ctx.Int1Type()) // 'done' field
+		if hasReturn {
+			stateFields = append(stateFields, b.llvmFnType.ReturnType())
+		}
+		stateStruct := b.ctx.StructType(stateFields, false)
+
+		// Allocate the state struct on the stack.
+		statePtr := builder.CreateAlloca(stateStruct, "status")
+
+		// Initialize the 'done' field.
+		doneGEP := builder.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
+			llvm.ConstInt(b.ctx.Int32Type(), uint64(numParams), false),
+		}, "done.gep")
+		builder.CreateStore(llvm.ConstNull(b.ctx.Int1Type()), doneGEP)
+
+		// Store all parameters in the state object.
+		for i, param := range exportedFn.Params() {
+			gep := builder.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+				llvm.ConstInt(b.ctx.Int32Type(), 0, false),
+				llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false),
+			}, "")
+			builder.CreateStore(param, gep)
+		}
+
+		// Create a new goroutine and add it to the runqueue.
+		wrapper := b.createGoroutineStartWrapper(b.llvmFnType, b.llvmFn, "", false, true, pos)
+		stackSize := llvm.ConstInt(b.uintptrType, b.DefaultStackSize, false)
+		taskStartFnType, taskStartFn := builder.getFunction(b.program.ImportedPackage("internal/task").Members["start"].(*ssa.Function))
+		builder.createCall(taskStartFnType, taskStartFn, []llvm.Value{wrapper, statePtr, stackSize, llvm.Undef(b.dataPtrType)}, "")
+
+		// Run the scheduler.
+		builder.createRuntimeCall("wasmExportRun", []llvm.Value{doneGEP}, "")
+
+		// Read the return value (if any) and return to the caller of the
+		// //go:wasmexport function.
+		if hasReturn {
+			gep := builder.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+				llvm.ConstInt(b.ctx.Int32Type(), 0, false),
+				llvm.ConstInt(b.ctx.Int32Type(), uint64(numParams)+1, false),
+			}, "")
+			retval := builder.CreateLoad(b.llvmFnType.ReturnType(), gep, "retval")
+			builder.CreateRet(retval)
+		} else {
+			builder.CreateRetVoid()
+		}
+	}
+}
+
 // createGoroutineStartWrapper creates a wrapper for the task-based
 // implementation of goroutines. For example, to call a function like this:
 //
@@ -142,7 +286,7 @@ func (b *builder) createGo(instr *ssa.Go) {
 // to last parameter of the function) is used for this wrapper. If hasContext is
 // false, the parameter bundle is assumed to have no context parameter and undef
 // is passed instead.
-func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.Value, prefix string, hasContext bool, pos token.Pos) llvm.Value {
+func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.Value, prefix string, hasContext, isWasmExport bool, pos token.Pos) llvm.Value {
 	var wrapper llvm.Value

 	b := &builder{
@@ -160,14 +304,18 @@ func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.
 	if !fn.IsAFunction().IsNil() {
 		// See whether this wrapper has already been created. If so, return it.
 		name := fn.Name()
-		wrapper = c.mod.NamedFunction(name + "$gowrapper")
+		wrapperName := name + "$gowrapper"
+		if isWasmExport {
+			wrapperName += "-wasmexport"
+		}
+		wrapper = c.mod.NamedFunction(wrapperName)
 		if !wrapper.IsNil() {
 			return llvm.ConstPtrToInt(wrapper, c.uintptrType)
 		}

 		// Create the wrapper.
 		wrapperType := llvm.FunctionType(c.ctx.VoidType(), []llvm.Type{c.dataPtrType}, false)
-		wrapper = llvm.AddFunction(c.mod, name+"$gowrapper", wrapperType)
+		wrapper = llvm.AddFunction(c.mod, wrapperName, wrapperType)
 		c.addStandardAttributes(wrapper)
 		wrapper.SetLinkage(llvm.LinkOnceODRLinkage)
 		wrapper.SetUnnamedAddr(true)
@@ -197,23 +345,110 @@ func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.
 			b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), difunc, llvm.Metadata{})
 		}

-		// Create the list of params for the call.
-		paramTypes := fnType.ParamTypes()
-		if !hasContext {
-			paramTypes = paramTypes[:len(paramTypes)-1] // strip context parameter
-		}
-		params := b.emitPointerUnpack(wrapper.Param(0), paramTypes)
-		if !hasContext {
-			params = append(params, llvm.Undef(c.dataPtrType)) // add dummy context parameter
-		}
+		if !isWasmExport {
+			// Regular 'go' instruction.

-		// Create the call.
-		b.CreateCall(fnType, fn, params, "")
+			// Create the list of params for the call.
+			paramTypes := fnType.ParamTypes()
+			if !hasContext {
+				paramTypes = paramTypes[:len(paramTypes)-1] // strip context parameter
+			}

-		if c.Scheduler == "asyncify" {
-			b.CreateCall(deadlockType, deadlock, []llvm.Value{
-				llvm.Undef(c.dataPtrType),
-			}, "")
+			params := b.emitPointerUnpack(wrapper.Param(0), paramTypes)
+			if !hasContext {
+				params = append(params, llvm.Undef(c.dataPtrType)) // add dummy context parameter
+			}
+
+			// Create the call.
+			b.CreateCall(fnType, fn, params, "")
+
+			if c.Scheduler == "asyncify" {
+				b.CreateCall(deadlockType, deadlock, []llvm.Value{
+					llvm.Undef(c.dataPtrType),
+				}, "")
+			}
+		} else {
+			// Goroutine started from a //go:wasmexport pragma.
+			// The function looks like this:
+			//
+			//   func foo$gowrapper-wasmexport(state *stateStruct) {
+			//       // load values
+			//       param0 := state.params[0]
+			//       param1 := state.params[1]
+			//
+			//       // call wrapped functions
+			//       result := foo(param0, param1, ...)
+			//
+			//       // store result value (if there is any)
+			//       state.result = result
+			//
+			//       // finish exported function
+			//       state.done = true
+			//       runtime.wasmExportExit()
+			//   }
+			//
+			// The state object here looks like:
+			//
+			//   struct state {
+			//       param0
+			//       param1
+			//       param* // etc
+			//       done bool
+			//       result returnType
+			//   }
+
+			returnType := fnType.ReturnType()
+			hasReturn := returnType != b.ctx.VoidType()
+			statePtr := wrapper.Param(0)
+
+			// Create the state struct (it must match the type in createWasmExport).
+			stateFields := fnType.ParamTypes()
+			numParams := len(stateFields) - 1
+			stateFields = stateFields[:numParams:numParams]     // strip 'context' parameter
+			stateFields = append(stateFields, c.ctx.Int1Type()) // 'done' bool
+			if hasReturn {
+				stateFields = append(stateFields, returnType)
+			}
+			stateStruct := b.ctx.StructType(stateFields, false)
+
+			// Extract parameters from the state object, and call the function
+			// that's being wrapped.
+			var callParams []llvm.Value
+			for i := 0; i < numParams; i++ {
+				gep := b.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+					llvm.ConstInt(b.ctx.Int32Type(), 0, false),
+					llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false),
+				}, "")
+				param := b.CreateLoad(stateFields[i], gep, "")
+				callParams = append(callParams, param)
+			}
+			callParams = append(callParams, llvm.ConstNull(c.dataPtrType)) // add 'context' parameter
+			result := b.CreateCall(fnType, fn, callParams, "")
+
+			// Store the return value back into the shared state.
+			// Unlike regular goroutines, these special //go:wasmexport
+			// goroutines can return a value.
+			if hasReturn {
+				gep := b.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+					llvm.ConstInt(c.ctx.Int32Type(), 0, false),
+					llvm.ConstInt(c.ctx.Int32Type(), uint64(numParams)+1, false),
+				}, "result.ptr")
+				b.CreateStore(result, gep)
+			}
+
+			// Mark this function as having finished executing.
+			// This is important so the runtime knows the exported function
+			// didn't block.
+			doneGEP := b.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
+				llvm.ConstInt(c.ctx.Int32Type(), 0, false),
+				llvm.ConstInt(c.ctx.Int32Type(), uint64(numParams), false),
+			}, "done.gep")
+			b.CreateStore(llvm.ConstInt(b.ctx.Int1Type(), 1, false), doneGEP)
+
+			// Call back into the runtime. This will exit the goroutine, switch
+			// back to the scheduler, which will in turn return from the
+			// //go:wasmexport function.
+			b.createRuntimeCall("wasmExportExit", nil, "")
 		}

 	} else {
@@ -295,5 +530,5 @@ func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.
 	}

 	// Return a ptrtoint of the wrapper, not the function itself.
-	return b.CreatePtrToInt(wrapper, c.uintptrType, "")
+	return llvm.ConstPtrToInt(wrapper, c.uintptrType)
 }
@@ -86,7 +86,7 @@ func (b *builder) createMakeInterface(val llvm.Value, typ types.Type, pos token.

 // extractValueFromInterface extract the value from an interface value
 // (runtime._interface) under the assumption that it is of the type given in
-// llvmType. The behavior is undefied if the interface is nil or llvmType
+// llvmType. The behavior is undefined if the interface is nil or llvmType
 // doesn't match the underlying type of the interface.
 func (b *builder) extractValueFromInterface(itf llvm.Value, llvmType llvm.Type) llvm.Value {
 	valuePtr := b.CreateExtractValue(itf, 1, "typeassert.value.ptr")
@@ -41,6 +41,8 @@ func (b *builder) createInterruptGlobal(instr *ssa.CallCommon) (llvm.Value, erro

 	// Create a new global of type runtime/interrupt.handle. Globals of this
 	// type are lowered in the interrupt lowering pass.
+	// It must have an alignment of 1, otherwise LLVM thinks a ptrtoint of the
+	// global has the lower bits unset.
 	globalType := b.program.ImportedPackage("runtime/interrupt").Type("handle").Type()
 	globalLLVMType := b.getLLVMType(globalType)
 	globalName := b.fn.Package().Pkg.Path() + "$interrupt" + strconv.FormatInt(id.Int64(), 10)
@@ -48,6 +50,7 @@ func (b *builder) createInterruptGlobal(instr *ssa.CallCommon) (llvm.Value, erro
 	global.SetVisibility(llvm.HiddenVisibility)
 	global.SetGlobalConstant(true)
 	global.SetUnnamedAddr(true)
+	global.SetAlignment(1)
 	initializer := llvm.ConstNull(globalLLVMType)
 	initializer = b.CreateInsertValue(initializer, funcContext, 0, "")
 	initializer = b.CreateInsertValue(initializer, funcPtr, 1, "")
@@ -7,6 +7,7 @@ import (
 	"math/big"
 	"strings"

+	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"tinygo.org/x/go-llvm"
 )
@@ -418,21 +419,11 @@ func (c *compilerContext) getPointerBitmap(typ llvm.Type, pos token.Pos) *big.In
 	}
 }

-// archFamily returns the archtecture from the LLVM triple but with some
+// archFamily returns the architecture from the LLVM triple but with some
 // architecture names ("armv6", "thumbv7m", etc) merged into a single
 // architecture name ("arm").
 func (c *compilerContext) archFamily() string {
-	arch := strings.Split(c.Triple, "-")[0]
-	if strings.HasPrefix(arch, "arm64") {
-		return "aarch64"
-	}
-	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
-		return "arm"
-	}
-	if arch == "mipsel" {
-		return "mips"
-	}
-	return arch
+	return compileopts.CanonicalArchName(c.Triple)
 }

 // isThumb returns whether we're in ARM or in Thumb mode. It panics if the
@@ -8,6 +8,7 @@
 package llvmutil

 import (
+	"encoding/binary"
 	"strconv"
 	"strings"

@@ -207,7 +208,7 @@ func AppendToGlobal(mod llvm.Module, globalName string, values ...llvm.Value) {
 	used.SetLinkage(llvm.AppendingLinkage)
 }

-// Return the LLVM major version.
+// Version returns the LLVM major version.
 func Version() int {
 	majorStr := strings.Split(llvm.Version, ".")[0]
 	major, err := strconv.Atoi(majorStr)
@@ -216,3 +217,13 @@ func Version() int {
 	}
 	return major
 }
+
+// Return the byte order for the given target triple. Most targets are little
+// endian, but for example MIPS can be big-endian.
+func ByteOrder(target string) binary.ByteOrder {
+	if strings.HasPrefix(target, "mips-") {
+		return binary.BigEndian
+	} else {
+		return binary.LittleEndian
+	}
+}
@@ -6,17 +6,11 @@ import (
 	"go/token"
 	"go/types"

+	"github.com/tinygo-org/tinygo/src/tinygo"
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
 )

-// constants for hashmap algorithms; must match src/runtime/hashmap.go
-const (
-	hashmapAlgorithmBinary = iota
-	hashmapAlgorithmString
-	hashmapAlgorithmInterface
-)
-
 // createMakeMap creates a new map object (runtime.hashmap) by allocating and
 // initializing an appropriately sized object.
 func (b *builder) createMakeMap(expr *ssa.MakeMap) (llvm.Value, error) {
@@ -24,20 +18,20 @@ func (b *builder) createMakeMap(expr *ssa.MakeMap) (llvm.Value, error) {
 	keyType := mapType.Key().Underlying()
 	llvmValueType := b.getLLVMType(mapType.Elem().Underlying())
 	var llvmKeyType llvm.Type
-	var alg uint64 // must match values in src/runtime/hashmap.go
+	var alg uint64
 	if t, ok := keyType.(*types.Basic); ok && t.Info()&types.IsString != 0 {
 		// String keys.
 		llvmKeyType = b.getLLVMType(keyType)
-		alg = hashmapAlgorithmString
+		alg = uint64(tinygo.HashmapAlgorithmString)
 	} else if hashmapIsBinaryKey(keyType) {
 		// Trivially comparable keys.
 		llvmKeyType = b.getLLVMType(keyType)
-		alg = hashmapAlgorithmBinary
+		alg = uint64(tinygo.HashmapAlgorithmBinary)
 	} else {
 		// All other keys. Implemented as map[interface{}]valueType for ease of
 		// implementation.
 		llvmKeyType = b.getLLVMRuntimeType("_interface")
-		alg = hashmapAlgorithmInterface
+		alg = uint64(tinygo.HashmapAlgorithmInterface)
 	}
 	keySize := b.targetData.TypeAllocSize(llvmKeyType)
 	valueSize := b.targetData.TypeAllocSize(llvmValueType)
@@ -326,7 +320,7 @@ func (b *builder) zeroUndefBytes(llvmType llvm.Type, ptr llvm.Value) error {
 			if i < numFields-1 {
 				nextOffset = b.targetData.ElementOffset(llvmStructType, i+1)
 			} else {
-				// Last field?  Next offset is the total size of the allcoate struct.
+				// Last field?  Next offset is the total size of the allocate struct.
 				nextOffset = b.targetData.TypeAllocSize(llvmStructType)
 			}

@@ -12,6 +12,7 @@ import (
 	"strings"

 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
+	"github.com/tinygo-org/tinygo/goenv"
 	"github.com/tinygo-org/tinygo/loader"
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
@@ -23,15 +24,18 @@ import (
 // The linkName value contains a valid link name, even if //go:linkname is not
 // present.
 type functionInfo struct {
-	wasmModule string     // go:wasm-module
-	wasmName   string     // wasm-export-name or wasm-import-name in the IR
-	linkName   string     // go:linkname, go:export - the IR function name
-	section    string     // go:section - object file section name
-	exported   bool       // go:export, CGo
-	interrupt  bool       // go:interrupt
-	nobounds   bool       // go:nobounds
-	variadic   bool       // go:variadic (CGo only)
-	inline     inlineType // go:inline
+	wasmModule    string     // go:wasm-module
+	wasmName      string     // wasm-export-name or wasm-import-name in the IR
+	wasmExport    string     // go:wasmexport is defined (export is unset, this adds an exported wrapper)
+	wasmExportPos token.Pos  // position of //go:wasmexport comment
+	linkName      string     // go:linkname, go:export - the IR function name
+	section       string     // go:section - object file section name
+	exported      bool       // go:export, CGo
+	interrupt     bool       // go:interrupt
+	nobounds      bool       // go:nobounds
+	noescape      bool       // go:noescape
+	variadic      bool       // go:variadic (CGo only)
+	inline        inlineType // go:inline
 }

 type inlineType int
@@ -124,11 +128,20 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 	c.addStandardDeclaredAttributes(llvmFn)

 	dereferenceableOrNullKind := llvm.AttributeKindID("dereferenceable_or_null")
-	for i, info := range paramInfos {
-		if info.elemSize != 0 {
-			dereferenceableOrNull := c.ctx.CreateEnumAttribute(dereferenceableOrNullKind, info.elemSize)
+	for i, paramInfo := range paramInfos {
+		if paramInfo.elemSize != 0 {
+			dereferenceableOrNull := c.ctx.CreateEnumAttribute(dereferenceableOrNullKind, paramInfo.elemSize)
 			llvmFn.AddAttributeAtIndex(i+1, dereferenceableOrNull)
 		}
+		if info.noescape && paramInfo.flags&paramIsGoParam != 0 && paramInfo.llvmType.TypeKind() == llvm.PointerTypeKind {
+			// Parameters to functions with a //go:noescape parameter should get
+			// the nocapture attribute. However, the context parameter should
+			// not.
+			// (It may be safe to add the nocapture parameter to the context
+			// parameter, but I'd like to stay on the safe side here).
+			nocapture := c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0)
+			llvmFn.AddAttributeAtIndex(i+1, nocapture)
+		}
 	}

 	// Set a number of function or parameter attributes, depending on the
@@ -139,6 +152,8 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		// On *nix systems, the "abort" functuion in libc is used to handle fatal panics.
 		// Mark it as noreturn so LLVM can optimize away code.
 		llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("noreturn"), 0))
+	case "internal/abi.NoEscape":
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 	case "runtime.alloc":
 		// Tell the optimizer that runtime.alloc is an allocator, meaning that it
 		// returns values that are never null and never alias to an existing value.
@@ -168,6 +183,12 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
 		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
+	case "runtime.stringFromBytes":
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
+	case "runtime.stringFromRunes":
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
 	case "runtime.trackPointer":
 		// This function is necessary for tracking pointers on the stack in a
 		// portable way (see gc_stack_portable.go). Indicate to the optimizer
@@ -210,13 +231,26 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		}
 	}

+	// Build the function if needed.
+	c.maybeCreateSyntheticFunction(fn, llvmFn)
+
+	return fnType, llvmFn
+}
+
+// If this is a synthetic function (such as a generic function or a wrapper),
+// create it now.
+func (c *compilerContext) maybeCreateSyntheticFunction(fn *ssa.Function, llvmFn llvm.Value) {
 	// Synthetic functions are functions that do not appear in the source code,
 	// they are artificially constructed. Usually they are wrapper functions
 	// that are not referenced anywhere except in a SSA call instruction so
 	// should be created right away.
 	// The exception is the package initializer, which does appear in the
 	// *ssa.Package members and so shouldn't be created here.
-	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" {
+	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" && fn.Synthetic != "range-over-func yield" {
+		if len(fn.Blocks) == 0 {
+			c.addError(fn.Pos(), "missing function body")
+			return
+		}
 		irbuilder := c.ctx.NewBuilder()
 		b := newBuilder(c, irbuilder, fn)
 		b.createFunction()
@@ -224,8 +258,6 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		llvmFn.SetLinkage(llvm.LinkOnceODRLinkage)
 		llvmFn.SetUnnamedAddr(true)
 	}
-
-	return fnType, llvmFn
 }

 // getFunctionInfo returns information about a function that is not directly
@@ -239,8 +271,22 @@ func (c *compilerContext) getFunctionInfo(f *ssa.Function) functionInfo {
 		// Pick the default linkName.
 		linkName: f.RelString(nil),
 	}
+
+	// Check for a few runtime functions that are treated specially.
+	if info.linkName == "runtime.wasmEntryReactor" && c.BuildMode == "c-shared" {
+		info.linkName = "_initialize"
+		info.wasmName = "_initialize"
+		info.exported = true
+	}
+	if info.linkName == "runtime.wasmEntryCommand" && c.BuildMode == "default" {
+		info.linkName = "_start"
+		info.wasmName = "_start"
+		info.exported = true
+	}
+
 	// Check for //go: pragmas, which may change the link name (among others).
 	c.parsePragmas(&info, f)
+
 	c.functionInfos[f] = info
 	return info
 }
@@ -248,126 +294,171 @@ func (c *compilerContext) getFunctionInfo(f *ssa.Function) functionInfo {
 // parsePragmas is used by getFunctionInfo to parse function pragmas such as
 // //export or //go:noinline.
 func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
-	if f.Syntax() == nil {
+	syntax := f.Syntax()
+	if f.Origin() != nil {
+		syntax = f.Origin().Syntax()
+	}
+	if syntax == nil {
 		return
 	}
-	if decl, ok := f.Syntax().(*ast.FuncDecl); ok && decl.Doc != nil {
+
+	// Read all pragmas of this function.
+	var pragmas []*ast.Comment
+	hasWasmExport := false
+	if decl, ok := syntax.(*ast.FuncDecl); ok && decl.Doc != nil {
 		for _, comment := range decl.Doc.List {
 			text := comment.Text
-			if strings.HasPrefix(text, "//export ") {
-				// Rewrite '//export' to '//go:export' for compatibility with
-				// gc.
-				text = "//go:" + text[2:]
+			if strings.HasPrefix(text, "//go:") || strings.HasPrefix(text, "//export ") {
+				pragmas = append(pragmas, comment)
+				if strings.HasPrefix(comment.Text, "//go:wasmexport ") {
+					hasWasmExport = true
+				}
 			}
-			if !strings.HasPrefix(text, "//go:") {
+		}
+	}
+
+	// Parse each pragma.
+	for _, comment := range pragmas {
+		parts := strings.Fields(comment.Text)
+		switch parts[0] {
+		case "//export", "//go:export":
+			if len(parts) != 2 {
+				continue
+			}
+			if hasWasmExport {
+				// //go:wasmexport overrides //export.
 				continue
 			}
-			parts := strings.Fields(text)
-			switch parts[0] {
-			case "//go:export":
-				if len(parts) != 2 {
-					continue
-				}

-				info.linkName = parts[1]
-				info.wasmName = info.linkName
-				info.exported = true
-			case "//go:interrupt":
-				if hasUnsafeImport(f.Pkg.Pkg) {
-					info.interrupt = true
-				}
-			case "//go:wasm-module":
-				// Alternative comment for setting the import module.
-				// This is deprecated, use //go:wasmimport instead.
-				if len(parts) != 2 {
-					continue
-				}
-				info.wasmModule = parts[1]
-			case "//go:wasmimport":
-				// Import a WebAssembly function, for example a WASI function.
-				// Original proposal: https://github.com/golang/go/issues/38248
-				// Allow globally: https://github.com/golang/go/issues/59149
-				if len(parts) != 3 {
-					continue
-				}
-				c.checkWasmImport(f, comment.Text)
-				info.exported = true
-				info.wasmModule = parts[1]
-				info.wasmName = parts[2]
-			case "//go:inline":
-				info.inline = inlineHint
-			case "//go:noinline":
+			info.linkName = parts[1]
+			info.wasmName = info.linkName
+			info.exported = true
+		case "//go:interrupt":
+			if hasUnsafeImport(f.Pkg.Pkg) {
+				info.interrupt = true
+			}
+		case "//go:wasm-module":
+			// Alternative comment for setting the import module.
+			// This is deprecated, use //go:wasmimport instead.
+			if len(parts) != 2 {
+				continue
+			}
+			info.wasmModule = parts[1]
+		case "//go:wasmimport":
+			// Import a WebAssembly function, for example a WASI function.
+			// Original proposal: https://github.com/golang/go/issues/38248
+			// Allow globally: https://github.com/golang/go/issues/59149
+			if len(parts) != 3 {
+				continue
+			}
+			if f.Blocks != nil {
+				// Defined functions cannot be exported.
+				c.addError(f.Pos(), "can only use //go:wasmimport on declarations")
+				continue
+			}
+			c.checkWasmImportExport(f, comment.Text)
+			info.exported = true
+			info.wasmModule = parts[1]
+			info.wasmName = parts[2]
+		case "//go:wasmexport":
+			if f.Blocks == nil {
+				c.addError(f.Pos(), "can only use //go:wasmexport on definitions")
+				continue
+			}
+			if len(parts) != 2 {
+				c.addError(f.Pos(), fmt.Sprintf("expected one parameter to //go:wasmexport, not %d", len(parts)-1))
+				continue
+			}
+			name := parts[1]
+			if name == "_start" || name == "_initialize" {
+				c.addError(f.Pos(), fmt.Sprintf("//go:wasmexport does not allow %#v", name))
+				continue
+			}
+			if c.BuildMode != "c-shared" && f.RelString(nil) == "main.main" {
+				c.addError(f.Pos(), fmt.Sprintf("//go:wasmexport does not allow main.main to be exported with -buildmode=%s", c.BuildMode))
+				continue
+			}
+			if c.archFamily() != "wasm32" {
+				c.addError(f.Pos(), "//go:wasmexport is only supported on wasm")
+			}
+			c.checkWasmImportExport(f, comment.Text)
+			info.wasmExport = name
+			info.wasmExportPos = comment.Slash
+		case "//go:inline":
+			info.inline = inlineHint
+		case "//go:noinline":
+			info.inline = inlineNone
+		case "//go:linkname":
+			if len(parts) != 3 || parts[1] != f.Name() {
+				continue
+			}
+			// Only enable go:linkname when the package imports "unsafe".
+			// This is a slightly looser requirement than what gc uses: gc
+			// requires the file to import "unsafe", not the package as a
+			// whole.
+			if hasUnsafeImport(f.Pkg.Pkg) {
+				info.linkName = parts[2]
+			}
+		case "//go:section":
+			// Only enable go:section when the package imports "unsafe".
+			// go:section also implies go:noinline since inlining could
+			// move the code to a different section than that requested.
+			if len(parts) == 2 && hasUnsafeImport(f.Pkg.Pkg) {
+				info.section = parts[1]
 				info.inline = inlineNone
-			case "//go:linkname":
-				if len(parts) != 3 || parts[1] != f.Name() {
-					continue
-				}
-				// Only enable go:linkname when the package imports "unsafe".
-				// This is a slightly looser requirement than what gc uses: gc
-				// requires the file to import "unsafe", not the package as a
-				// whole.
-				if hasUnsafeImport(f.Pkg.Pkg) {
-					info.linkName = parts[2]
-				}
-			case "//go:section":
-				// Only enable go:section when the package imports "unsafe".
-				// go:section also implies go:noinline since inlining could
-				// move the code to a different section than that requested.
-				if len(parts) == 2 && hasUnsafeImport(f.Pkg.Pkg) {
-					info.section = parts[1]
-					info.inline = inlineNone
-				}
-			case "//go:nobounds":
-				// Skip bounds checking in this function. Useful for some
-				// runtime functions.
-				// This is somewhat dangerous and thus only imported in packages
-				// that import unsafe.
-				if hasUnsafeImport(f.Pkg.Pkg) {
-					info.nobounds = true
-				}
-			case "//go:variadic":
-				// The //go:variadic pragma is emitted by the CGo preprocessing
-				// pass for C variadic functions. This includes both explicit
-				// (with ...) and implicit (no parameters in signature)
-				// functions.
-				if strings.HasPrefix(f.Name(), "C.") {
-					// This prefix cannot naturally be created, it must have
-					// been created as a result of CGo preprocessing.
-					info.variadic = true
-				}
+			}
+		case "//go:nobounds":
+			// Skip bounds checking in this function. Useful for some
+			// runtime functions.
+			// This is somewhat dangerous and thus only imported in packages
+			// that import unsafe.
+			if hasUnsafeImport(f.Pkg.Pkg) {
+				info.nobounds = true
+			}
+		case "//go:noescape":
+			// Don't let pointer parameters escape.
+			// Following the upstream Go implementation, we only do this for
+			// declarations, not definitions.
+			if len(f.Blocks) == 0 {
+				info.noescape = true
+			}
+		case "//go:variadic":
+			// The //go:variadic pragma is emitted by the CGo preprocessing
+			// pass for C variadic functions. This includes both explicit
+			// (with ...) and implicit (no parameters in signature)
+			// functions.
+			if strings.HasPrefix(f.Name(), "C.") {
+				// This prefix cannot naturally be created, it must have
+				// been created as a result of CGo preprocessing.
+				info.variadic = true
 			}
 		}
 	}
 }

-// Check whether this function cannot be used in //go:wasmimport. It will add an
-// error if this is the case.
+// Check whether this function can be used in //go:wasmimport or
+// //go:wasmexport. It will add an error if this is not the case.
 //
 // The list of allowed types is based on this proposal:
 // https://github.com/golang/go/issues/59149
-func (c *compilerContext) checkWasmImport(f *ssa.Function, pragma string) {
+func (c *compilerContext) checkWasmImportExport(f *ssa.Function, pragma string) {
 	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" {
 		// The runtime is a special case. Allow all kinds of parameters
 		// (importantly, including pointers).
 		return
 	}
-	if f.Blocks != nil {
-		// Defined functions cannot be exported.
-		c.addError(f.Pos(), fmt.Sprintf("can only use //go:wasmimport on declarations"))
-		return
-	}
 	if f.Signature.Results().Len() > 1 {
 		c.addError(f.Signature.Results().At(1).Pos(), fmt.Sprintf("%s: too many return values", pragma))
 	} else if f.Signature.Results().Len() == 1 {
 		result := f.Signature.Results().At(0)
-		if !isValidWasmType(result.Type(), siteResult) {
+		if !c.isValidWasmType(result.Type(), siteResult) {
 			c.addError(result.Pos(), fmt.Sprintf("%s: unsupported result type %s", pragma, result.Type().String()))
 		}
 	}
 	for _, param := range f.Params {
 		// Check whether the type is allowed.
 		// Only a very limited number of types can be mapped to WebAssembly.
-		if !isValidWasmType(param.Type(), siteParam) {
+		if !c.isValidWasmType(param.Type(), siteParam) {
 			c.addError(param.Pos(), fmt.Sprintf("%s: unsupported parameter type %s", pragma, param.Type().String()))
 		}
 	}
@@ -380,13 +471,15 @@ func (c *compilerContext) checkWasmImport(f *ssa.Function, pragma string) {
 //
 // This previously reflected the additional restrictions documented here:
 // https://github.com/golang/go/issues/59149
-func isValidWasmType(typ types.Type, site wasmSite) bool {
+func (c *compilerContext) isValidWasmType(typ types.Type, site wasmSite) bool {
 	switch typ := typ.Underlying().(type) {
 	case *types.Basic:
 		switch typ.Kind() {
 		case types.Bool:
 			return true
-		case types.Int, types.Uint, types.Int8, types.Uint8, types.Int16, types.Uint16, types.Int32, types.Uint32, types.Int64, types.Uint64:
+		case types.Int8, types.Uint8, types.Int16, types.Uint16:
+			return site == siteIndirect
+		case types.Int32, types.Uint32, types.Int64, types.Uint64:
 			return true
 		case types.Float32, types.Float64:
 			return true
@@ -397,19 +490,35 @@ func isValidWasmType(typ types.Type, site wasmSite) bool {
 			return site == siteParam || site == siteIndirect
 		}
 	case *types.Array:
-		return site == siteIndirect && isValidWasmType(typ.Elem(), siteIndirect)
+		return site == siteIndirect && c.isValidWasmType(typ.Elem(), siteIndirect)
 	case *types.Struct:
 		if site != siteIndirect {
 			return false
 		}
+		// Structs with no fields do not need structs.HostLayout
+		if typ.NumFields() == 0 {
+			return true
+		}
+		hasHostLayout := true // default to true before detecting Go version
+		// (*types.Package).GoVersion added in go1.21
+		if gv, ok := any(c.pkg).(interface{ GoVersion() string }); ok {
+			if goenv.Compare(gv.GoVersion(), "go1.23") >= 0 {
+				hasHostLayout = false // package structs added in go1.23
+			}
+		}
 		for i := 0; i < typ.NumFields(); i++ {
-			if !isValidWasmType(typ.Field(i).Type(), siteIndirect) {
+			ftyp := typ.Field(i).Type()
+			if ftyp.String() == "structs.HostLayout" {
+				hasHostLayout = true
+				continue
+			}
+			if !c.isValidWasmType(ftyp, siteIndirect) {
 				return false
 			}
 		}
-		return true
+		return hasHostLayout
 	case *types.Pointer:
-		return isValidWasmType(typ.Elem(), siteIndirect)
+		return c.isValidWasmType(typ.Elem(), siteIndirect)
 	}
 	return false
 }
@@ -5,6 +5,7 @@ package compiler

 import (
 	"strconv"
+	"strings"

 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
@@ -145,7 +146,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		// Also useful:
 		// https://web.archive.org/web/20220529105937/https://www.linux-mips.org/wiki/Syscall
 		// The syscall number goes in r2, the result also in r2.
-		// Register r7 is both an input paramter and an output parameter: if it
+		// Register r7 is both an input parameter and an output parameter: if it
 		// is non-zero, the system call failed and r2 is the error code.
 		// The code below implements the O32 syscall ABI, not the N32 ABI. It
 		// could implement both at the same time if needed (like what appears to
@@ -329,3 +330,64 @@ func (b *builder) createRawSyscallNoError(call *ssa.CallCommon) (llvm.Value, err
 	retval = b.CreateInsertValue(retval, llvm.ConstInt(b.uintptrType, 0, false), 1, "")
 	return retval, nil
 }
+
+// Lower a call to internal/abi.FuncPCABI0 on MacOS.
+// This function is called like this:
+//
+//	syscall(abi.FuncPCABI0(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+//
+// So we'll want to return a function pointer (as uintptr) that points to the
+// libc function. Specifically, we _don't_ want to point to the trampoline
+// function (which is implemented in Go assembly which we can't read), but
+// rather to the actually intended function. For this we're going to assume that
+// all the functions follow a specific pattern: libc_<functionname>_trampoline.
+//
+// The return value is the function pointer as an uintptr, or a nil value if
+// this isn't possible (and a regular call should be made as fallback).
+func (b *builder) createDarwinFuncPCABI0Call(instr *ssa.CallCommon) llvm.Value {
+	if b.GOOS != "darwin" {
+		// This has only been tested on MacOS (and only seems to be used there).
+		return llvm.Value{}
+	}
+
+	// Check that it uses a function call like syscall.libc_*_trampoline
+	itf := instr.Args[0].(*ssa.MakeInterface)
+	calledFn := itf.X.(*ssa.Function)
+	if pkgName := calledFn.Pkg.Pkg.Path(); pkgName != "syscall" && pkgName != "internal/syscall/unix" {
+		return llvm.Value{}
+	}
+	if !strings.HasPrefix(calledFn.Name(), "libc_") || !strings.HasSuffix(calledFn.Name(), "_trampoline") {
+
+		return llvm.Value{}
+	}
+
+	// Extract the libc function name.
+	name := strings.TrimPrefix(strings.TrimSuffix(calledFn.Name(), "_trampoline"), "libc_")
+	if name == "open" {
+		// Special case: open() is a variadic function and can't be called like
+		// a regular function. Therefore, we need to use a wrapper implemented
+		// in C.
+		name = "syscall_libc_open"
+	}
+	if b.GOARCH == "amd64" {
+		if name == "fdopendir" || name == "readdir_r" {
+			// Hack to support amd64, which needs the $INODE64 suffix.
+			// This is also done in upstream Go:
+			// https://github.com/golang/go/commit/096ab3c21b88ccc7d411379d09fe6274e3159467
+			name += "$INODE64"
+		}
+	}
+
+	// Obtain the C function.
+	// Use a simple function (no parameters or return value) because all we need
+	// is the address of the function.
+	llvmFn := b.mod.NamedFunction(name)
+	if llvmFn.IsNil() {
+		llvmFnType := llvm.FunctionType(b.ctx.VoidType(), nil, false)
+		llvmFn = llvm.AddFunction(b.mod, name, llvmFnType)
+	}
+
+	// Cast the function pointer to a uintptr (because that's what
+	// abi.FuncPCABI0 returns).
+	return b.CreatePtrToInt(llvmFn, b.uintptrType, "")
+}
@@ -3,7 +3,7 @@ source_filename = "channel.go"
 target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

-%runtime.channelBlockedList = type { ptr, ptr, ptr, { ptr, i32, i32 } }
+%runtime.channelOp = type { ptr, ptr, i32, ptr }
 %runtime.chanSelectState = type { ptr, ptr }

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -18,15 +18,15 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.chanIntSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanIntSend(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
-  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
+  %chan.op = alloca %runtime.channelOp, align 8
  %chan.value = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
  store i32 3, ptr %chan.value, align 4
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
-  call void @runtime.chanSend(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.blockedList, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
+  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @runtime.chanSend(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.op, ptr undef) #4
+  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
  ret void
 }
@@ -34,48 +34,48 @@ entry:
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

-declare void @runtime.chanSend(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
+declare void @runtime.chanSend(ptr dereferenceable_or_null(36), ptr, ptr dereferenceable_or_null(16), ptr) #1

 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

 ; Function Attrs: nounwind
-define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
-  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
+  %chan.op = alloca %runtime.channelOp, align 8
  %chan.value = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
-  %0 = call i1 @runtime.chanRecv(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.blockedList, ptr undef) #4
+  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  %0 = call i1 @runtime.chanRecv(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.op, ptr undef) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
+  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
  ret void
 }

-declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
+declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(36), ptr, ptr dereferenceable_or_null(16), ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
-  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
-  call void @runtime.chanSend(ptr %ch, ptr null, ptr nonnull %chan.blockedList, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
+  %chan.op = alloca %runtime.channelOp, align 8
+  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @runtime.chanSend(ptr %ch, ptr null, ptr nonnull %chan.op, ptr undef) #4
+  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
-  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
-  %0 = call i1 @runtime.chanRecv(ptr %ch, ptr null, ptr nonnull %chan.blockedList, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
+  %chan.op = alloca %runtime.channelOp, align 8
+  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  %0 = call i1 @runtime.chanRecv(ptr %ch, ptr null, ptr nonnull %chan.op, ptr undef) #4
+  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.selectZeroRecv(ptr dereferenceable_or_null(32) %ch1, ptr dereferenceable_or_null(32) %ch2, ptr %context) unnamed_addr #2 {
+define hidden void @main.selectZeroRecv(ptr dereferenceable_or_null(36) %ch1, ptr dereferenceable_or_null(36) %ch2, ptr %context) unnamed_addr #2 {
 entry:
  %select.states.alloca = alloca [2 x %runtime.chanSelectState], align 8
  %select.send.value = alloca i32, align 4
@@ -88,7 +88,7 @@ entry:
  store ptr %ch2, ptr %0, align 4
  %.repack3 = getelementptr inbounds [2 x %runtime.chanSelectState], ptr %select.states.alloca, i32 0, i32 1, i32 1
  store ptr null, ptr %.repack3, align 4
-  %select.result = call { i32, i1 } @runtime.tryChanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr undef) #4
+  %select.result = call { i32, i1 } @runtime.chanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr null, i32 0, i32 0, ptr undef) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %select.states.alloca)
  %1 = extractvalue { i32, i1 } %select.result, 0
  %2 = icmp eq i32 %1, 0
@@ -105,7 +105,7 @@ select.body:                                      ; preds = %select.next
  br label %select.done
 }

-declare { i32, i1 } @runtime.tryChanSelect(ptr, ptr, i32, i32, ptr) #1
+declare { i32, i1 } @runtime.chanSelect(ptr, ptr, i32, i32, ptr, i32, i32, ptr) #1

 attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
@@ -3,7 +3,7 @@ source_filename = "defer.go"
 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
 target triple = "thumbv7m-unknown-unknown-eabi"

-%runtime.deferFrame = type { ptr, ptr, [0 x ptr], ptr, i1, %runtime._interface }
+%runtime.deferFrame = type { ptr, ptr, [0 x ptr], ptr, i8, %runtime._interface }
 %runtime._interface = type { ptr, ptr }
 %runtime._defer = type { i32, ptr }

@@ -122,12 +122,18 @@ declare void @runtime.destroyDeferFrame(ptr dereferenceable_or_null(24), ptr) #2
 ; Function Attrs: nounwind
 define internal void @"main.deferSimple$1"(ptr %context) unnamed_addr #1 {
 entry:
+  call void @runtime.printlock(ptr undef) #4
  call void @runtime.printint32(i32 3, ptr undef) #4
+  call void @runtime.printunlock(ptr undef) #4
  ret void
 }

+declare void @runtime.printlock(ptr) #2
+
 declare void @runtime.printint32(i32, ptr) #2

+declare void @runtime.printunlock(ptr) #2
+
 ; Function Attrs: nounwind
 define hidden void @main.deferMultiple(ptr %context) unnamed_addr #1 {
 entry:
@@ -250,14 +256,18 @@ rundefers.end7:                                   ; preds = %rundefers.loophead1
 ; Function Attrs: nounwind
 define internal void @"main.deferMultiple$1"(ptr %context) unnamed_addr #1 {
 entry:
+  call void @runtime.printlock(ptr undef) #4
  call void @runtime.printint32(i32 3, ptr undef) #4
+  call void @runtime.printunlock(ptr undef) #4
  ret void
 }

 ; Function Attrs: nounwind
 define internal void @"main.deferMultiple$2"(ptr %context) unnamed_addr #1 {
 entry:
+  call void @runtime.printlock(ptr undef) #4
  call void @runtime.printint32(i32 5, ptr undef) #4
+  call void @runtime.printunlock(ptr undef) #4
  ret void
 }

@@ -1,6 +1,9 @@
 package main

-import "unsafe"
+import (
+	"structs"
+	"unsafe"
+)

 //go:wasmimport modulename empty
 func empty()
@@ -14,31 +17,37 @@ func implementation() {
 type Uint uint32

 type S struct {
+	_ structs.HostLayout
 	a [4]uint32
 	b uintptr
-	c int
 	d float32
 	e float64
 }

 //go:wasmimport modulename validparam
-func validparam(a int32, b uint64, c float64, d unsafe.Pointer, e Uint, f uintptr, g string, h *int32, i *S)
+func validparam(a int32, b uint64, c float64, d unsafe.Pointer, e Uint, f uintptr, g string, h *int32, i *S, j *struct{}, k *[8]uint8)

 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type [4]uint32
 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type []byte
 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type struct{a int}
 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type chan struct{}
 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type func()
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type int
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type uint
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type [8]int
 //
 //go:wasmimport modulename invalidparam
-func invalidparam(a [4]uint32, b []byte, c struct{ a int }, d chan struct{}, e func())
+func invalidparam(a [4]uint32, b []byte, c struct{ a int }, d chan struct{}, e func(), f int, g uint, h [8]int)
+
+// ERROR: //go:wasmimport modulename invalidparam_no_hostlayout: unsupported parameter type *struct{int}
+// ERROR: //go:wasmimport modulename invalidparam_no_hostlayout: unsupported parameter type *struct{string}
+//
+//go:wasmimport modulename invalidparam_no_hostlayout
+func invalidparam_no_hostlayout(a *struct{ int }, b *struct{ string })

 //go:wasmimport modulename validreturn_int32
 func validreturn_int32() int32

-//go:wasmimport modulename validreturn_int
-func validreturn_int() int
-
 //go:wasmimport modulename validreturn_ptr_int32
 func validreturn_ptr_int32() *int32

@@ -48,6 +57,12 @@ func validreturn_ptr_string() *string
 //go:wasmimport modulename validreturn_ptr_struct
 func validreturn_ptr_struct() *S

+//go:wasmimport modulename validreturn_ptr_struct
+func validreturn_ptr_empty_struct() *struct{}
+
+//go:wasmimport modulename validreturn_ptr_array
+func validreturn_ptr_array() *[8]uint8
+
 //go:wasmimport modulename validreturn_unsafe_pointer
 func validreturn_unsafe_pointer() unsafe.Pointer

@@ -56,11 +71,26 @@ func validreturn_unsafe_pointer() unsafe.Pointer
 //go:wasmimport modulename manyreturns
 func manyreturns() (int32, int32)

+// ERROR: //go:wasmimport modulename invalidreturn_int: unsupported result type int
+//
+//go:wasmimport modulename invalidreturn_int
+func invalidreturn_int() int
+
+// ERROR: //go:wasmimport modulename invalidreturn_int: unsupported result type uint
+//
+//go:wasmimport modulename invalidreturn_int
+func invalidreturn_uint() uint
+
 // ERROR: //go:wasmimport modulename invalidreturn_func: unsupported result type func()
 //
 //go:wasmimport modulename invalidreturn_func
 func invalidreturn_func() func()

+// ERROR: //go:wasmimport modulename invalidreturn_pointer_array_int: unsupported result type *[8]int
+//
+//go:wasmimport modulename invalidreturn_pointer_array_int
+func invalidreturn_pointer_array_int() *[8]int
+
 // ERROR: //go:wasmimport modulename invalidreturn_slice_byte: unsupported result type []byte
 //
 //go:wasmimport modulename invalidreturn_slice_byte
@@ -3,8 +3,6 @@ source_filename = "goroutine.go"
 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
 target triple = "thumbv7m-unknown-unknown-eabi"

-%runtime._string = type { ptr, i32 }
-
@"main$string" = internal unnamed_addr constant [4 x i8] c"test", align 1

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -72,7 +70,9 @@ entry:
  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr undef) #9
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
  %2 = load i32, ptr %n, align 4
+  call void @runtime.printlock(ptr undef) #9
  call void @runtime.printint32(i32 %2, ptr undef) #9
+  call void @runtime.printunlock(ptr undef) #9
  ret void
 }

@@ -93,8 +93,12 @@ entry:
  ret void
 }

+declare void @runtime.printlock(ptr) #2
+
 declare void @runtime.printint32(i32, ptr) #2

+declare void @runtime.printunlock(ptr) #2
+
 ; Function Attrs: nounwind
 define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #1 {
 entry:
@@ -137,25 +141,25 @@ entry:
 declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
+define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #1 {
 entry:
  call void @runtime.chanClose(ptr %ch, ptr undef) #9
  ret void
 }

-declare void @runtime.chanClose(ptr dereferenceable_or_null(32), ptr) #2
+declare void @runtime.chanClose(ptr dereferenceable_or_null(36), ptr) #2

 ; Function Attrs: nounwind
 define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
  store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1
+  %1 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 1
  store ptr @"main$string", ptr %1, align 4
-  %.repack1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1, i32 1
-  store i32 4, ptr %.repack1, align 4
-  %2 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 2
-  store ptr %itf.typecode, ptr %2, align 4
+  %2 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 2
+  store i32 4, ptr %2, align 4
+  %3 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 3
+  store ptr %itf.typecode, ptr %3, align 4
  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr undef) #9
  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
  ret void
@@ -3,8 +3,6 @@ source_filename = "goroutine.go"
 target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

-%runtime._string = type { ptr, i32 }
-
@"main$string" = internal unnamed_addr constant [4 x i8] c"test", align 1

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -78,7 +76,9 @@ entry:
  store ptr %n, ptr %1, align 4
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
  %2 = load i32, ptr %n, align 4
+  call void @runtime.printlock(ptr undef) #9
  call void @runtime.printint32(i32 %2, ptr undef) #9
+  call void @runtime.printunlock(ptr undef) #9
  ret void
 }

@@ -100,8 +100,12 @@ entry:
  unreachable
 }

+declare void @runtime.printlock(ptr) #1
+
 declare void @runtime.printint32(i32, ptr) #1

+declare void @runtime.printunlock(ptr) #1
+
 ; Function Attrs: nounwind
 define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #2 {
 entry:
@@ -146,13 +150,13 @@ entry:
 declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
  call void @runtime.chanClose(ptr %ch, ptr undef) #9
  ret void
 }

-declare void @runtime.chanClose(ptr dereferenceable_or_null(32), ptr) #1
+declare void @runtime.chanClose(ptr dereferenceable_or_null(36), ptr) #1

 ; Function Attrs: nounwind
 define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
@@ -161,12 +165,12 @@ entry:
  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
  store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1
+  %1 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 1
  store ptr @"main$string", ptr %1, align 4
-  %.repack1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1, i32 1
-  store i32 4, ptr %.repack1, align 4
-  %2 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 2
-  store ptr %itf.typecode, ptr %2, align 4
+  %2 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 2
+  store i32 4, ptr %2, align 4
+  %3 = getelementptr inbounds { ptr, ptr, i32, ptr }, ptr %0, i32 0, i32 3
+  store ptr %itf.typecode, ptr %3, align 4
  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
  ret void
 }
@@ -48,6 +48,22 @@ func inlineFunc() {
 func noinlineFunc() {
 }

+type Int interface {
+	int8 | int16
+}
+
+// Same for generic functions (but the compiler may miss the pragma due to it
+// being generic).
+//
+//go:noinline
+func noinlineGenericFunc[T Int]() {
+}
+
+func useGeneric() {
+	// Make sure the generic function above is instantiated.
+	noinlineGenericFunc[int8]()
+}
+
 // This function should have the specified section.
 //
 //go:section .special_function_section
@@ -90,3 +106,12 @@ var undefinedGlobalNotInSection uint32
 //go:align 1024
 //go:section .global_section
 var multipleGlobalPragmas uint32
+
+//go:noescape
+func doesNotEscapeParam(a *int, b []int, c chan int, d *[0]byte)
+
+// The //go:noescape pragma only works on declarations, not definitions.
+//
+//go:noescape
+func stillEscapes(a *int, b []int, c chan int, d *[0]byte) {
+}
@@ -48,6 +48,19 @@ entry:
  ret void
 }

+; Function Attrs: nounwind
+define hidden void @main.useGeneric(ptr %context) unnamed_addr #2 {
+entry:
+  call void @"main.noinlineGenericFunc[int8]"(ptr undef)
+  ret void
+}
+
+; Function Attrs: noinline nounwind
+define linkonce_odr hidden void @"main.noinlineGenericFunc[int8]"(ptr %context) unnamed_addr #5 {
+entry:
+  ret void
+}
+
 ; Function Attrs: noinline nounwind
 define hidden void @main.functionInSection(ptr %context) unnamed_addr #5 section ".special_function_section" {
 entry:
@@ -72,6 +85,14 @@ entry:

 declare void @main.undefinedFunctionNotInSection(ptr) #1

+declare void @main.doesNotEscapeParam(ptr nocapture dereferenceable_or_null(4), ptr nocapture, i32, i32, ptr nocapture dereferenceable_or_null(36), ptr nocapture, ptr) #1
+
+; Function Attrs: nounwind
+define hidden void @main.stillEscapes(ptr dereferenceable_or_null(4) %a, ptr %b.data, i32 %b.len, i32 %b.cap, ptr dereferenceable_or_null(36) %c, ptr %d, ptr %context) unnamed_addr #2 {
+entry:
+  ret void
+}
+
 attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
@@ -43,7 +43,7 @@ func CreateDiagnostics(err error) ProgramDiagnostic {
 	if err == nil {
 		return nil
 	}
-	// Right now, the compiler will only show errors for the first pacakge that
+	// Right now, the compiler will only show errors for the first package that
 	// fails to build. This is likely to change in the future.
 	return ProgramDiagnostic{
 		createPackageDiagnostic(err),
@@ -147,7 +147,7 @@ func createDiagnostics(err error) []Diagnostic {
 					// last package
 					fmt.Fprintln(buf, "\timports", pkgPath+": "+err.Err.Error())
 				} else {
-					// not the last pacakge
+					// not the last package
 					fmt.Fprintln(buf, "\timports", pkgPath)
 				}
 			}
@@ -7,7 +7,6 @@ import (
 	"regexp"
 	"strings"
 	"testing"
-	"time"

 	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/diagnostics"
@@ -15,38 +14,57 @@ import (

 // Test the error messages of the TinyGo compiler.
 func TestErrors(t *testing.T) {
-	for _, name := range []string{
-		"cgo",
-		"compiler",
-		"interp",
-		"loader-importcycle",
-		"loader-invaliddep",
-		"loader-invalidpackage",
-		"loader-nopackage",
-		"optimizer",
-		"syntax",
-		"types",
+	// TODO: nicely formatted error messages for:
+	//   - duplicate symbols in ld.lld (currently only prints bitcode file)
+	type errorTest struct {
+		name   string
+		target string
+	}
+	for _, tc := range []errorTest{
+		{name: "cgo"},
+		{name: "compiler"},
+		{name: "interp"},
+		{name: "invalidmain"},
+		{name: "invalidname"},
+		{name: "linker-flashoverflow", target: "cortex-m-qemu"},
+		{name: "linker-ramoverflow", target: "cortex-m-qemu"},
+		{name: "linker-undefined", target: "darwin/arm64"},
+		{name: "linker-undefined", target: "linux/amd64"},
+		//{name: "linker-undefined", target: "windows/amd64"}, // TODO: no source location
+		{name: "linker-undefined", target: "cortex-m-qemu"},
+		//{name: "linker-undefined", target: "wasip1"}, // TODO: no source location
+		{name: "loader-importcycle"},
+		{name: "loader-invaliddep"},
+		{name: "loader-invalidpackage"},
+		{name: "loader-nopackage"},
+		{name: "optimizer"},
+		{name: "syntax"},
+		{name: "types"},
 	} {
+		name := tc.name
+		if tc.target != "" {
+			name += "#" + tc.target
+		}
+		target := tc.target
+		if target == "" {
+			target = "wasip1"
+		}
 		t.Run(name, func(t *testing.T) {
-			testErrorMessages(t, "./testdata/errors/"+name+".go")
+			options := optionsFromTarget(target, sema)
+			testErrorMessages(t, "./testdata/errors/"+tc.name+".go", &options)
 		})
 	}
 }

-func testErrorMessages(t *testing.T, filename string) {
+func testErrorMessages(t *testing.T, filename string, options *compileopts.Options) {
+	t.Parallel()
+
 	// Parse expected error messages.
 	expected := readErrorMessages(t, filename)

 	// Try to build a binary (this should fail with an error).
 	tmpdir := t.TempDir()
-	err := Build(filename, tmpdir+"/out", &compileopts.Options{
-		Target:        "wasip1",
-		Semaphore:     sema,
-		InterpTimeout: 180 * time.Second,
-		Debug:         true,
-		VerifyIR:      true,
-		Opt:           "z",
-	})
+	err := Build(filename, tmpdir+"/out", options)
 	if err == nil {
 		t.Fatal("expected to get a compiler error")
 	}
@@ -20,16 +20,16 @@
    },
    "nixpkgs": {
      "locked": {
-        "lastModified": 1703068421,
-        "narHash": "sha256-WSw5Faqlw75McIflnl5v7qVD/B3S2sLh+968bpOGrWA=",
+        "lastModified": 1728500571,
+        "narHash": "sha256-dOymOQ3AfNI4Z337yEwHGohrVQb4yPODCW9MDUyAc4w=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "d65bceaee0fb1e64363f7871bc43dc1c6ecad99f",
+        "rev": "d51c28603def282a24fa034bcb007e2bcb5b5dd0",
        "type": "github"
      },
      "original": {
        "id": "nixpkgs",
-        "ref": "nixos-23.11",
+        "ref": "nixos-24.05",
        "type": "indirect"
      }
    },
@@ -35,7 +35,7 @@
  inputs = {
    # Use a recent stable release, but fix the version to make it reproducible.
    # This version should be updated from time to time.
-    nixpkgs.url = "nixpkgs/nixos-23.11";
+    nixpkgs.url = "nixpkgs/nixos-24.05";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = { self, nixpkgs, flake-utils }:
@@ -49,11 +49,11 @@
          buildInputs = [
            # These dependencies are required for building tinygo (go install).
            go
-            llvmPackages_17.llvm
-            llvmPackages_17.libclang
+            llvmPackages_18.llvm
+            llvmPackages_18.libclang
            # Additional dependencies needed at runtime, for building and/or
            # flashing.
-            llvmPackages_17.lld
+            llvmPackages_18.lld
            avrdude
            binaryen
            # Additional dependencies needed for on-chip debugging.
@@ -68,7 +68,7 @@
            # Without setting these explicitly, Homebrew versions might be used
            # or the default `ar` and `nm` tools might be used (which don't
            # support wasi).
-            export CLANG="clang-17 -resource-dir ${llvmPackages_17.clang.cc.lib}/lib/clang/17"
+            export CLANG="clang-18 -resource-dir ${llvmPackages_18.clang.cc.lib}/lib/clang/18"
            export LLVM_AR=llvm-ar
            export LLVM_NM=llvm-nm

@@ -77,7 +77,7 @@
            export MD5SUM=md5sum

            # Ugly hack to make the Clang resources directory available.
-            export GOFLAGS="\"-ldflags=-X github.com/tinygo-org/tinygo/goenv.clangResourceDir=${llvmPackages_17.clang.cc.lib}/lib/clang/17\" -tags=llvm17"
+            export GOFLAGS="\"-ldflags=-X github.com/tinygo-org/tinygo/goenv.clangResourceDir=${llvmPackages_18.clang.cc.lib}/lib/clang/18\" -tags=llvm18"
          '';
        };
      }
@@ -7,15 +7,14 @@ require (
 	github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2
 	github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee
 	github.com/chromedp/chromedp v0.7.6
-	github.com/client9/misspell v0.3.4
 	github.com/gofrs/flock v0.8.1
 	github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf
 	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
 	github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892
 	github.com/mattn/go-colorable v0.1.13
 	github.com/mattn/go-tty v0.0.4
-	github.com/mgechev/revive v1.3.7
 	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
+	github.com/tetratelabs/wazero v1.6.0
 	go.bug.st/serial v1.6.0
 	golang.org/x/net v0.26.0
 	golang.org/x/sys v0.21.0
@@ -25,23 +24,14 @@ require (
 )

 require (
-	github.com/BurntSushi/toml v1.3.2 // indirect
-	github.com/chavacava/garif v0.1.0 // indirect
 	github.com/chromedp/sysutil v1.0.0 // indirect
 	github.com/creack/goselect v0.1.2 // indirect
-	github.com/fatih/color v1.16.0 // indirect
-	github.com/fatih/structtag v1.2.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.1.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.9 // indirect
-	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/spf13/afero v1.11.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
 	golang.org/x/text v0.16.0 // indirect
 )
@@ -1,11 +1,7 @@
-github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
-github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c h1:4T0Vj1UkGgcpkRrmn7SbokebnlfxJcMZPgWtOYACAAA=
 github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2 h1:oMCHnXa6CCCafdPDbMh/lWRhRByN0VFLvv+g+ayx1SI=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2/go.mod h1:PkYb9DJNAwrSvRx5DYA+gUcOIgTGVMNkfSCbZM8cWpI=
-github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
-github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
 github.com/chromedp/cdproto v0.0.0-20211126220118-81fa0469ad77/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
 github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee h1:+SFdIVfQpG0s0DHYzou0kgfE0n0ZjKPwbiRJsXrZegU=
 github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
@@ -13,17 +9,9 @@ github.com/chromedp/chromedp v0.7.6 h1:2juGaktzjwULlsn+DnvIZXFUckEp5xs+GOBroaea+
 github.com/chromedp/chromedp v0.7.6/go.mod h1:ayT4YU/MGAALNfOg9gNrpGSAdnU51PMx+FCeuT1iXzo=
 github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
 github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
-github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/creack/goselect v0.1.2 h1:2DNy14+JPjRBgPzAd1thbQp4BSIihxcBf0IXhQXDRa0=
 github.com/creack/goselect v0.1.2/go.mod h1:a/NhLweNvqIYMuxcMOuWY516Cimucms3DglDzQP3hKY=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
-github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
-github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
-github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
@@ -51,35 +39,17 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
-github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-tty v0.0.4 h1:NVikla9X8MN0SQAqCYzpGyXv0jY7MNl3HOWD2dkle7E=
 github.com/mattn/go-tty v0.0.4/go.mod h1:u5GGXBtZU6RQoKV8gY5W6UhMudbR5vXnUe7j3pxse28=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
-github.com/mgechev/revive v1.3.7 h1:502QY0vQGe9KtYJ9FpxMz9rL+Fc/P13CI5POL4uHCcE=
-github.com/mgechev/revive v1.3.7/go.mod h1:RJ16jUbF0OWC3co/+XTxmFNgEpUPwnnA0BRllX2aDNA=
-github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
-github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
-github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
-github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3 h1:aQKxg3+2p+IFXXg97McgDGT5zcMrQoi0EICZs8Pgchs=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3/go.mod h1:9/etS5gpQq9BJsJMWg1wpLbfuSnkm8dPF6FdW2JXVhA=
-github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
-github.com/spf13/afero v1.11.0/go.mod h1:GH9Y3pIexgf1MTIWtNGyogA5MwRIDXGUr+hbWNoBjkY=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/tetratelabs/wazero v1.6.0 h1:z0H1iikCdP8t+q341xqepY4EWvHEw8Es7tlqiVzlP3g=
+github.com/tetratelabs/wazero v1.6.0/go.mod h1:0U0G41+ochRKoPKCJlh0jMg1CHkyfK8kDqiirMmKY8A=
 go.bug.st/serial v1.6.0 h1:mAbRGN4cKE2J5gMwsMHC2KQisdLRQssO9WSM+rbZJ8A=
 go.bug.st/serial v1.6.0/go.mod h1:UABfsluHAiaNI+La2iESysd9Vetq7VRdpxvjx7CmmOE=
 golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
@@ -103,8 +73,6 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 tinygo.org/x/go-llvm v0.0.0-20240627184919-3b50c76783a8 h1:bLsZXRUBavt++CJlMN7sppNziqu3LyamESLhFJcpqFQ=
 tinygo.org/x/go-llvm v0.0.0-20240627184919-3b50c76783a8/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=
@@ -30,8 +30,11 @@ var Keys = []string{
 }

 func init() {
-	if Get("GOARCH") == "arm" {
+	switch Get("GOARCH") {
+	case "arm":
 		Keys = append(Keys, "GOARM")
+	case "mips", "mipsle":
+		Keys = append(Keys, "GOMIPS")
 	}
 }

@@ -128,6 +131,13 @@ func Get(name string) string {
 		// difference between ARMv6 and ARMv7. ARMv6 binaries are much smaller,
 		// especially when floating point instructions are involved.
 		return "6"
+	case "GOMIPS":
+		gomips := os.Getenv("GOMIPS")
+		if gomips == "" {
+			// Default to hardfloat (this matches the Go toolchain).
+			gomips = "hardfloat"
+		}
+		return gomips
 	case "GOROOT":
 		readGoEnvVars()
 		return goEnvVars.GOROOT
@@ -4,29 +4,37 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"runtime/debug"
 	"strings"
 )

 // Version of TinyGo.
 // Update this value before release of new version of software.
-const version = "0.33.0-dev"
-
-var (
-	// This variable is set at build time using -ldflags parameters.
-	// See: https://stackoverflow.com/a/11355611
-	GitSha1 string
-)
+const version = "0.35.0"

 // Return TinyGo version, either in the form 0.30.0 or as a development version
 // (like 0.30.0-dev-abcd012).
 func Version() string {
 	v := version
-	if strings.HasSuffix(version, "-dev") && GitSha1 != "" {
-		v += "-" + GitSha1
+	if strings.HasSuffix(version, "-dev") {
+		if hash := readGitHash(); hash != "" {
+			v += "-" + hash
+		}
 	}
 	return v
 }

+func readGitHash() string {
+	if info, ok := debug.ReadBuildInfo(); ok {
+		for _, setting := range info.Settings {
+			if setting.Key == "vcs.revision" {
+				return setting.Value[:8]
+			}
+		}
+	}
+	return ""
+}
+
 // GetGorootVersion returns the major and minor version for a given GOROOT path.
 // If the goroot cannot be determined, (0, 0) is returned.
 func GetGorootVersion() (major, minor int, err error) {
@@ -34,27 +42,67 @@ func GetGorootVersion() (major, minor int, err error) {
 	if err != nil {
 		return 0, 0, err
 	}
+	major, minor, _, err = Parse(s)
+	return major, minor, err
+}

-	if s == "" || s[:2] != "go" {
-		return 0, 0, errors.New("could not parse Go version: version does not start with 'go' prefix")
+// Parse parses the Go version (like "go1.3.2") in the parameter and return the
+// major, minor, and patch version: 1, 3, and 2 in this example.
+// If there is an error, (0, 0, 0) and an error will be returned.
+func Parse(version string) (major, minor, patch int, err error) {
+	if strings.HasPrefix(version, "devel ") {
+		version = strings.Split(strings.TrimPrefix(version, "devel "), version)[0]
+	}
+	if version == "" || version[:2] != "go" {
+		return 0, 0, 0, errors.New("could not parse Go version: version does not start with 'go' prefix")
 	}

-	parts := strings.Split(s[2:], ".")
+	parts := strings.Split(version[2:], ".")
 	if len(parts) < 2 {
-		return 0, 0, errors.New("could not parse Go version: version has less than two parts")
+		return 0, 0, 0, errors.New("could not parse Go version: version has less than two parts")
 	}

 	// Ignore the errors, we don't really handle errors here anyway.
 	var trailing string
-	n, err := fmt.Sscanf(s, "go%d.%d%s", &major, &minor, &trailing)
-	if n == 2 && err == io.EOF {
+	n, err := fmt.Sscanf(version, "go%d.%d.%d%s", &major, &minor, &patch, &trailing)
+	if n == 2 {
+		n, err = fmt.Sscanf(version, "go%d.%d%s", &major, &minor, &trailing)
+	}
+	if n >= 2 && err == io.EOF {
 		// Means there were no trailing characters (i.e., not an alpha/beta)
 		err = nil
 	}
 	if err != nil {
-		return 0, 0, fmt.Errorf("failed to parse version: %s", err)
+		return 0, 0, 0, fmt.Errorf("failed to parse version: %s", err)
+	}
+
+	return major, minor, patch, nil
+}
+
+// Compare compares two Go version strings.
+// The result will be 0 if a == b, -1 if a < b, and +1 if a > b.
+// If either a or b is not a valid Go version, it is treated as "go0.0"
+// and compared lexicographically.
+// See [Parse] for more information.
+func Compare(a, b string) int {
+	aMajor, aMinor, aPatch, _ := Parse(a)
+	bMajor, bMinor, bPatch, _ := Parse(b)
+	switch {
+	case aMajor < bMajor:
+		return -1
+	case aMajor > bMajor:
+		return +1
+	case aMinor < bMinor:
+		return -1
+	case aMinor > bMinor:
+		return +1
+	case aPatch < bPatch:
+		return -1
+	case aPatch > bPatch:
+		return +1
+	default:
+		return strings.Compare(a, b)
 	}
-	return
 }

 // GorootVersionString returns the version string as reported by the Go
@@ -0,0 +1,72 @@
+package goenv
+
+import "testing"
+
+func TestParse(t *testing.T) {
+	tests := []struct {
+		v       string
+		major   int
+		minor   int
+		patch   int
+		wantErr bool
+	}{
+		{"", 0, 0, 0, true},
+		{"go", 0, 0, 0, true},
+		{"go1", 0, 0, 0, true},
+		{"go.0", 0, 0, 0, true},
+		{"go1.0", 1, 0, 0, false},
+		{"go1.1", 1, 1, 0, false},
+		{"go1.23", 1, 23, 0, false},
+		{"go1.23.5", 1, 23, 5, false},
+		{"go1.23.5-rc6", 1, 23, 5, false},
+		{"go2.0", 2, 0, 0, false},
+		{"go2.0.15", 2, 0, 15, false},
+		{"devel go1.24-f99f5da18f Thu Nov 14 22:29:26 2024 +0000 darwin/arm64", 1, 24, 0, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.v, func(t *testing.T) {
+			major, minor, patch, err := Parse(tt.v)
+			if err == nil && tt.wantErr {
+				t.Errorf("Parse(%q): expected err != nil", tt.v)
+			}
+			if err != nil && !tt.wantErr {
+				t.Errorf("Parse(%q): expected err == nil", tt.v)
+			}
+			if major != tt.major || minor != tt.minor || patch != tt.patch {
+				t.Errorf("Parse(%q): expected %d, %d, %d, nil; got %d, %d, %d, %v",
+					tt.v, tt.major, tt.minor, tt.patch, major, minor, patch, err)
+			}
+		})
+	}
+}
+
+func TestCompare(t *testing.T) {
+	tests := []struct {
+		a    string
+		b    string
+		want int
+	}{
+		{"", "", 0},
+		{"go0", "go0", 0},
+		{"go0", "go1", -1},
+		{"go1", "go0", 1},
+		{"go1", "go2", -1},
+		{"go2", "go1", 1},
+		{"go1.1", "go1.2", -1},
+		{"go1.2", "go1.1", 1},
+		{"go1.1.0", "go1.2.0", -1},
+		{"go1.2.0", "go1.1.0", 1},
+		{"go1.2.0", "go2.3.0", -1},
+		{"go1.23.2", "go1.23.10", -1},
+		{"go0.1.22", "go1.23.101", -1},
+	}
+	for _, tt := range tests {
+		t.Run(tt.a+" "+tt.b, func(t *testing.T) {
+			got := Compare(tt.a, tt.b)
+			if got != tt.want {
+				t.Errorf("Compare(%q, %q): expected %d; got %d",
+					tt.a, tt.b, tt.want, got)
+			}
+		})
+	}
+}
@@ -0,0 +1,30 @@
+// TODO: remove this (by merging it into the top-level go.mod)
+// once the top level go.mod specifies a go new enough to make our version of misspell happy.
+
+module tools
+
+go 1.21
+
+require (
+	github.com/golangci/misspell v0.6.0
+	github.com/mgechev/revive v1.3.9
+)
+
+require (
+	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/chavacava/garif v0.1.0 // indirect
+	github.com/fatih/color v1.17.0 // indirect
+	github.com/fatih/structtag v1.2.0 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/tools v0.23.0 // indirect
+)
@@ -0,0 +1,56 @@
+github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
+github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
+github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.17.0 h1:GlRw1BRJxkpqUCBKzKOw098ed57fEsKeNjpTe3cSjK4=
+github.com/fatih/color v1.17.0/go.mod h1:YZ7TlrGPkiz6ku9fK3TLD/pl3CpsiFyu8N92HLgmosI=
+github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
+github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
+github.com/golangci/misspell v0.6.0 h1:JCle2HUTNWirNlDIAUO44hUsKhOFqGPoC4LZxlaSXDs=
+github.com/golangci/misspell v0.6.0/go.mod h1:keMNyY6R9isGaSAu+4Q8NMBwMPkh15Gtc8UCVoDtAWo=
+github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
+github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
+github.com/mgechev/revive v1.3.9 h1:18Y3R4a2USSBF+QZKFQwVkBROUda7uoBlkEuBD+YD1A=
+github.com/mgechev/revive v1.3.9/go.mod h1:+uxEIr5UH0TjXWHTno3xh4u7eg6jDpXKzQccA9UGhHU=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
+github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
+github.com/spf13/afero v1.11.0/go.mod h1:GH9Y3pIexgf1MTIWtNGyogA5MwRIDXGUr+hbWNoBjkY=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
+golang.org/x/tools v0.23.0/go.mod h1:pnu6ufv6vQkll6szChhK3C3L/ruaIv5eBeztNG8wtsI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -5,9 +5,9 @@
 package tools

 import (
-	_ "github.com/client9/misspell"
+	_ "github.com/golangci/misspell"
 	_ "github.com/mgechev/revive"
 )

-//go:generate go install github.com/client9/misspell/cmd/misspell
+//go:generate go install github.com/golangci/misspell/cmd/misspell
 //go:generate go install github.com/mgechev/revive
@@ -2,11 +2,17 @@ module github.com/tinygo-org/tinygo/internal/tools

 go 1.22.4

-require github.com/ydnar/wasm-tools-go v0.1.4
+require github.com/bytecodealliance/wasm-tools-go v0.3.1

 require (
 	github.com/coreos/go-semver v0.3.1 // indirect
-	github.com/urfave/cli/v3 v3.0.0-alpha9 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
-	golang.org/x/mod v0.19.0 // indirect
+	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/regclient/regclient v0.7.1 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/ulikunitz/xz v0.5.12 // indirect
+	github.com/urfave/cli/v3 v3.0.0-alpha9.2 // indirect
+	golang.org/x/mod v0.21.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
 )
@@ -1,25 +1,44 @@
+github.com/bytecodealliance/wasm-tools-go v0.3.1 h1:9Q9PjSzkbiVmkUvZ7nYCfJ02mcQDBalxycA3s8g7kR4=
+github.com/bytecodealliance/wasm-tools-go v0.3.1/go.mod h1:vNAQ8DAEp6xvvk+TUHah5DslLEa76f4H6e737OeaxuY=
 github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
 github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
+github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/olareg/olareg v0.1.0 h1:1dXBOgPrig5N7zoXyIZVQqU0QBo6sD9pbL6UYjY75CA=
+github.com/olareg/olareg v0.1.0/go.mod h1:RBuU7JW7SoIIxZKzLRhq8sVtQeAHzCAtRrXEBx2KlM4=
+github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/regclient/regclient v0.7.1 h1:qEsJrTmZd98fZKjueAbrZCSNGU+ifnr6xjlSAs3WOPs=
+github.com/regclient/regclient v0.7.1/go.mod h1:+w/BFtJuw0h0nzIw/z2+1FuA2/dVXBzDq4rYmziJpMc=
 github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
 github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-github.com/urfave/cli/v3 v3.0.0-alpha9 h1:P0RMy5fQm1AslQS+XCmy9UknDXctOmG/q/FZkUFnJSo=
-github.com/urfave/cli/v3 v3.0.0-alpha9/go.mod h1:0kK/RUFHyh+yIKSfWxwheGndfnrvYSmYFVeKCh03ZUc=
-github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
-github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
-github.com/ydnar/wasm-tools-go v0.1.4 h1:+25WqBj0AhLx8OFvZvrs7bQO6L3WtQ7t6JzQEYsXQb8=
-github.com/ydnar/wasm-tools-go v0.1.4/go.mod h1:lQfv2Tde3tRgZDSYriro0EmdSHzP1mrHPMmYNahSS/g=
-golang.org/x/mod v0.19.0 h1:fEdghXQSo20giMthA7cd28ZC+jts4amQ3YMXiP5oMQ8=
-golang.org/x/mod v0.19.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
-golang.org/x/tools v0.23.0/go.mod h1:pnu6ufv6vQkll6szChhK3C3L/ruaIv5eBeztNG8wtsI=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
+github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
+github.com/urfave/cli/v3 v3.0.0-alpha9.2 h1:CL8llQj3dGRLVQQzHxS+ZYRLanOuhyK1fXgLKD+qV+Y=
+github.com/urfave/cli/v3 v3.0.0-alpha9.2/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
+golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
+golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
+golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
+golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -5,7 +5,7 @@
 package tools

 import (
-	_ "github.com/ydnar/wasm-tools-go/cmd/wit-bindgen-go"
+	_ "github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go"
 )

-//go:generate go install github.com/ydnar/wasm-tools-go/cmd/wit-bindgen-go
+//go:generate go install github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go
@@ -28,7 +28,7 @@ All in all, this design provides several benefits:
    it should be a whole lot faster for loops as it doesn't have to call into
    LLVM (via CGo) for every operation.

-As mentioned, this partial evaulator comes in three parts: a compiler, an
+As mentioned, this partial evaluator comes in three parts: a compiler, an
 interpreter, and a memory manager.

 ## Compiler
@@ -3,11 +3,13 @@
 package interp

 import (
+	"encoding/binary"
 	"fmt"
 	"os"
 	"strings"
 	"time"

+	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"tinygo.org/x/go-llvm"
 )

@@ -24,6 +26,7 @@ type runner struct {
 	dataPtrType   llvm.Type                // often used type so created in advance
 	uintptrType   llvm.Type                // equivalent to uintptr in Go
 	maxAlign      int                      // maximum alignment of an object, alignment of runtime.alloc() result
+	byteOrder     binary.ByteOrder         // big-endian or little-endian
 	debug         bool                     // log debug messages
 	pkgName       string                   // package name of the currently executing package
 	functionCache map[llvm.Value]*function // cache of compiled functions
@@ -38,6 +41,7 @@ func newRunner(mod llvm.Module, timeout time.Duration, debug bool) *runner {
 	r := runner{
 		mod:           mod,
 		targetData:    llvm.NewTargetData(mod.DataLayout()),
+		byteOrder:     llvmutil.ByteOrder(mod.Target()),
 		debug:         debug,
 		functionCache: make(map[llvm.Value]*function),
 		objects:       []object{{}},
@@ -52,7 +56,7 @@ func newRunner(mod llvm.Module, timeout time.Duration, debug bool) *runner {
 	return &r
 }

-// Dispose deallocates all alloated LLVM resources.
+// Dispose deallocates all allocated LLVM resources.
 func (r *runner) dispose() {
 	r.targetData.Dispose()
 	r.targetData = llvm.TargetData{}
@@ -173,7 +173,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			case 3:
 				// Conditional branch: [cond, thenBB, elseBB]
 				lastBB = currentBB
-				switch operands[0].Uint() {
+				switch operands[0].Uint(r) {
 				case 1: // true -> thenBB
 					currentBB = int(operands[1].(literalValue).value.(uint32))
 				case 0: // false -> elseBB
@@ -191,12 +191,12 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			}
 		case llvm.Switch:
 			// Switch statement: [value, defaultLabel, case0, label0, case1, label1, ...]
-			value := operands[0].Uint()
-			targetLabel := operands[1].Uint() // default label
+			value := operands[0].Uint(r)
+			targetLabel := operands[1].Uint(r) // default label
 			// Do a lazy switch by iterating over all cases.
 			for i := 2; i < len(operands); i += 2 {
-				if value == operands[i].Uint() {
-					targetLabel = operands[i+1].Uint()
+				if value == operands[i].Uint(r) {
+					targetLabel = operands[i+1].Uint(r)
 					break
 				}
 			}
@@ -211,7 +211,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			// Select is much like a ternary operator: it picks a result from
 			// the second and third operand based on the boolean first operand.
 			var result value
-			switch operands[0].Uint() {
+			switch operands[0].Uint(r) {
 			case 1:
 				result = operands[1]
 			case 0:
@@ -282,14 +282,22 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				// by creating a global variable.

 				// Get the requested memory size to be allocated.
-				size := operands[1].Uint()
+				size := operands[1].Uint(r)

 				// Get the object layout, if it is available.
 				llvmLayoutType := r.getLLVMTypeFromLayout(operands[2])

+				// Get the alignment of the memory to be allocated.
+				alignment := 0 // use default alignment if unset
+				alignAttr := inst.llvmInst.GetCallSiteEnumAttribute(0, llvm.AttributeKindID("align"))
+				if !alignAttr.IsNil() {
+					alignment = int(alignAttr.GetEnumValue())
+				}
+
 				// Create the object.
 				alloc := object{
 					globalName:     r.pkgName + "$alloc",
+					align:          alignment,
 					llvmLayoutType: llvmLayoutType,
 					buffer:         newRawValue(uint32(size)),
 					size:           uint32(size),
@@ -318,9 +326,9 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				//     memmove(dst, src, n*elemSize)
 				//     return int(n)
 				// }
-				dstLen := operands[3].Uint()
-				srcLen := operands[4].Uint()
-				elemSize := operands[5].Uint()
+				dstLen := operands[3].Uint(r)
+				srcLen := operands[4].Uint(r)
+				elemSize := operands[5].Uint(r)
 				n := srcLen
 				if n > dstLen {
 					n = dstLen
@@ -374,7 +382,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				if err != nil {
 					return nil, mem, r.errorAt(inst, err)
 				}
-				nBytes := uint32(operands[3].Uint())
+				nBytes := uint32(operands[3].Uint(r))
 				dstObj := mem.getWritable(dst.index())
 				dstBuf := dstObj.buffer.asRawValue(r)
 				if mem.get(src.index()).buffer == nil {
@@ -646,6 +654,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				globalName: r.pkgName + "$alloca",
 				buffer:     newRawValue(uint32(size)),
 				size:       uint32(size),
+				align:      inst.llvmInst.Alignment(),
 			}
 			index := len(r.objects)
 			r.objects = append(r.objects, alloca)
@@ -661,8 +670,8 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			// pointer into the underlying object.
 			var offset int64
 			for i := 1; i < len(operands); i += 2 {
-				index := operands[i].Int()
-				elementSize := operands[i+1].Int()
+				index := operands[i].Int(r)
+				elementSize := operands[i+1].Int(r)
 				if elementSize < 0 {
 					// This is a struct field.
 					offset += index
@@ -677,7 +686,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 					return nil, mem, r.errorAt(inst, err)
 				}
 				// GEP on fixed pointer value (for example, memory-mapped I/O).
-				ptrValue := operands[0].Uint() + uint64(offset)
+				ptrValue := operands[0].Uint(r) + uint64(offset)
 				locals[inst.localIndex] = makeLiteralInt(ptrValue, int(operands[0].len(r)*8))
 				continue
 			}
@@ -739,11 +748,11 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			var lhs, rhs float64
 			switch operands[0].len(r) {
 			case 8:
-				lhs = math.Float64frombits(operands[0].Uint())
-				rhs = math.Float64frombits(operands[1].Uint())
+				lhs = math.Float64frombits(operands[0].Uint(r))
+				rhs = math.Float64frombits(operands[1].Uint(r))
 			case 4:
-				lhs = float64(math.Float32frombits(uint32(operands[0].Uint())))
-				rhs = float64(math.Float32frombits(uint32(operands[1].Uint())))
+				lhs = float64(math.Float32frombits(uint32(operands[0].Uint(r))))
+				rhs = float64(math.Float32frombits(uint32(operands[1].Uint(r))))
 			default:
 				panic("unknown float type")
 			}
@@ -782,23 +791,23 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				if inst.opcode == llvm.Add {
 					// This likely means this is part of a
 					// unsafe.Pointer(uintptr(ptr) + offset) pattern.
-					lhsPtr, err = lhsPtr.addOffset(int64(rhs.Uint()))
+					lhsPtr, err = lhsPtr.addOffset(int64(rhs.Uint(r)))
 					if err != nil {
 						return nil, mem, r.errorAt(inst, err)
 					}
 					locals[inst.localIndex] = lhsPtr
-				} else if inst.opcode == llvm.Xor && rhs.Uint() == 0 {
+				} else if inst.opcode == llvm.Xor && rhs.Uint(r) == 0 {
 					// Special workaround for strings.noescape, see
 					// src/strings/builder.go in the Go source tree. This is
 					// the identity operator, so we can return the input.
 					locals[inst.localIndex] = lhs
-				} else if inst.opcode == llvm.And && rhs.Uint() < 8 {
+				} else if inst.opcode == llvm.And && rhs.Uint(r) < 8 {
 					// This is probably part of a pattern to get the lower bits
 					// of a pointer for pointer tagging, like this:
 					//     uintptr(unsafe.Pointer(t)) & 0b11
 					// We can actually support this easily by ANDing with the
 					// pointer offset.
-					result := uint64(lhsPtr.offset()) & rhs.Uint()
+					result := uint64(lhsPtr.offset()) & rhs.Uint(r)
 					locals[inst.localIndex] = makeLiteralInt(result, int(lhs.len(r)*8))
 				} else {
 					// Catch-all for weird operations that should just be done
@@ -813,31 +822,31 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			var result uint64
 			switch inst.opcode {
 			case llvm.Add:
-				result = lhs.Uint() + rhs.Uint()
+				result = lhs.Uint(r) + rhs.Uint(r)
 			case llvm.Sub:
-				result = lhs.Uint() - rhs.Uint()
+				result = lhs.Uint(r) - rhs.Uint(r)
 			case llvm.Mul:
-				result = lhs.Uint() * rhs.Uint()
+				result = lhs.Uint(r) * rhs.Uint(r)
 			case llvm.UDiv:
-				result = lhs.Uint() / rhs.Uint()
+				result = lhs.Uint(r) / rhs.Uint(r)
 			case llvm.SDiv:
-				result = uint64(lhs.Int() / rhs.Int())
+				result = uint64(lhs.Int(r) / rhs.Int(r))
 			case llvm.URem:
-				result = lhs.Uint() % rhs.Uint()
+				result = lhs.Uint(r) % rhs.Uint(r)
 			case llvm.SRem:
-				result = uint64(lhs.Int() % rhs.Int())
+				result = uint64(lhs.Int(r) % rhs.Int(r))
 			case llvm.Shl:
-				result = lhs.Uint() << rhs.Uint()
+				result = lhs.Uint(r) << rhs.Uint(r)
 			case llvm.LShr:
-				result = lhs.Uint() >> rhs.Uint()
+				result = lhs.Uint(r) >> rhs.Uint(r)
 			case llvm.AShr:
-				result = uint64(lhs.Int() >> rhs.Uint())
+				result = uint64(lhs.Int(r) >> rhs.Uint(r))
 			case llvm.And:
-				result = lhs.Uint() & rhs.Uint()
+				result = lhs.Uint(r) & rhs.Uint(r)
 			case llvm.Or:
-				result = lhs.Uint() | rhs.Uint()
+				result = lhs.Uint(r) | rhs.Uint(r)
 			case llvm.Xor:
-				result = lhs.Uint() ^ rhs.Uint()
+				result = lhs.Uint(r) ^ rhs.Uint(r)
 			default:
 				panic("unreachable")
 			}
@@ -855,11 +864,11 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			// and then truncating it as necessary.
 			var value uint64
 			if inst.opcode == llvm.SExt {
-				value = uint64(operands[0].Int())
+				value = uint64(operands[0].Int(r))
 			} else {
-				value = operands[0].Uint()
+				value = operands[0].Uint(r)
 			}
-			bitwidth := operands[1].Uint()
+			bitwidth := operands[1].Uint(r)
 			if r.debug {
 				fmt.Fprintln(os.Stderr, indent+instructionNameMap[inst.opcode]+":", value, bitwidth)
 			}
@@ -868,11 +877,11 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 			var value float64
 			switch inst.opcode {
 			case llvm.SIToFP:
-				value = float64(operands[0].Int())
+				value = float64(operands[0].Int(r))
 			case llvm.UIToFP:
-				value = float64(operands[0].Uint())
+				value = float64(operands[0].Uint(r))
 			}
-			bitwidth := operands[1].Uint()
+			bitwidth := operands[1].Uint(r)
 			if r.debug {
 				fmt.Fprintln(os.Stderr, indent+instructionNameMap[inst.opcode]+":", value, bitwidth)
 			}
@@ -918,21 +927,21 @@ func (r *runner) interpretICmp(lhs, rhs value, predicate llvm.IntPredicate) bool
 		}
 		return result
 	case llvm.IntUGT:
-		return lhs.Uint() > rhs.Uint()
+		return lhs.Uint(r) > rhs.Uint(r)
 	case llvm.IntUGE:
-		return lhs.Uint() >= rhs.Uint()
+		return lhs.Uint(r) >= rhs.Uint(r)
 	case llvm.IntULT:
-		return lhs.Uint() < rhs.Uint()
+		return lhs.Uint(r) < rhs.Uint(r)
 	case llvm.IntULE:
-		return lhs.Uint() <= rhs.Uint()
+		return lhs.Uint(r) <= rhs.Uint(r)
 	case llvm.IntSGT:
-		return lhs.Int() > rhs.Int()
+		return lhs.Int(r) > rhs.Int(r)
 	case llvm.IntSGE:
-		return lhs.Int() >= rhs.Int()
+		return lhs.Int(r) >= rhs.Int(r)
 	case llvm.IntSLT:
-		return lhs.Int() < rhs.Int()
+		return lhs.Int(r) < rhs.Int(r)
 	case llvm.IntSLE:
-		return lhs.Int() <= rhs.Int()
+		return lhs.Int(r) <= rhs.Int(r)
 	default:
 		// _should_ be unreachable, until LLVM adds new icmp operands (unlikely)
 		panic("interp: unsupported icmp")
@@ -42,6 +42,7 @@ type object struct {
 	globalName     string    // name, if not yet created (not guaranteed to be the final name)
 	buffer         value     // buffer with value as given by interp, nil if external
 	size           uint32    // must match buffer.len(), if available
+	align          int       // alignment of the object (may be 0 if unknown)
 	constant       bool      // true if this is a constant global
 	marked         uint8     // 0 means unmarked, 1 means external read, 2 means external write
 }
@@ -361,8 +362,8 @@ type value interface {
 	clone() value
 	asPointer(*runner) (pointerValue, error)
 	asRawValue(*runner) rawValue
-	Uint() uint64
-	Int() int64
+	Uint(*runner) uint64
+	Int(*runner) int64
 	toLLVMValue(llvm.Type, *memoryView) (llvm.Value, error)
 	String() string
 }
@@ -405,7 +406,8 @@ func (v literalValue) len(r *runner) uint32 {
 }

 func (v literalValue) String() string {
-	return strconv.FormatInt(v.Int(), 10)
+	// Note: passing a nil *runner to v.Int because we know it won't use it.
+	return strconv.FormatInt(v.Int(nil), 10)
 }

 func (v literalValue) clone() value {
@@ -421,13 +423,13 @@ func (v literalValue) asRawValue(r *runner) rawValue {
 	switch value := v.value.(type) {
 	case uint64:
 		buf = make([]byte, 8)
-		binary.LittleEndian.PutUint64(buf, value)
+		r.byteOrder.PutUint64(buf, value)
 	case uint32:
 		buf = make([]byte, 4)
-		binary.LittleEndian.PutUint32(buf, uint32(value))
+		r.byteOrder.PutUint32(buf, uint32(value))
 	case uint16:
 		buf = make([]byte, 2)
-		binary.LittleEndian.PutUint16(buf, uint16(value))
+		r.byteOrder.PutUint16(buf, uint16(value))
 	case uint8:
 		buf = []byte{uint8(value)}
 	default:
@@ -440,7 +442,7 @@ func (v literalValue) asRawValue(r *runner) rawValue {
 	return raw
 }

-func (v literalValue) Uint() uint64 {
+func (v literalValue) Uint(r *runner) uint64 {
 	switch value := v.value.(type) {
 	case uint64:
 		return value
@@ -455,7 +457,7 @@ func (v literalValue) Uint() uint64 {
 	}
 }

-func (v literalValue) Int() int64 {
+func (v literalValue) Int(r *runner) int64 {
 	switch value := v.value.(type) {
 	case uint64:
 		return int64(value)
@@ -553,11 +555,11 @@ func (v pointerValue) asRawValue(r *runner) rawValue {
 	return rv
 }

-func (v pointerValue) Uint() uint64 {
+func (v pointerValue) Uint(r *runner) uint64 {
 	panic("cannot convert pointer to integer")
 }

-func (v pointerValue) Int() int64 {
+func (v pointerValue) Int(r *runner) int64 {
 	panic("cannot convert pointer to integer")
 }

@@ -592,6 +594,12 @@ func (v pointerValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Val
 		// runtime.alloc.
 		// First allocate a new global for this object.
 		obj := mem.get(v.index())
+		alignment := obj.align
+		if alignment == 0 {
+			// Unknown alignment, perhaps from a direct call to runtime.alloc in
+			// the runtime. Use a conservative default instead.
+			alignment = mem.r.maxAlign
+		}
 		if obj.llvmType.IsNil() && obj.llvmLayoutType.IsNil() {
 			// Create an initializer without knowing the global type.
 			// This is probably the result of a runtime.alloc call.
@@ -602,7 +610,7 @@ func (v pointerValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Val
 			globalType := initializer.Type()
 			llvmValue = llvm.AddGlobal(mem.r.mod, globalType, obj.globalName)
 			llvmValue.SetInitializer(initializer)
-			llvmValue.SetAlignment(mem.r.maxAlign)
+			llvmValue.SetAlignment(alignment)
 			obj.llvmGlobal = llvmValue
 			mem.put(v.index(), obj)
 		} else {
@@ -641,11 +649,7 @@ func (v pointerValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Val
 				return llvm.Value{}, errors.New("interp: allocated value does not match allocated type")
 			}
 			llvmValue.SetInitializer(initializer)
-			if obj.llvmType.IsNil() {
-				// The exact type isn't known (only the layout), so use the
-				// alignment that would normally be expected from runtime.alloc.
-				llvmValue.SetAlignment(mem.r.maxAlign)
-			}
+			llvmValue.SetAlignment(alignment)
 		}

 		// It should be included in r.globals because otherwise markExternal
@@ -702,7 +706,12 @@ func (v rawValue) String() string {
 		}
 		// Format as number if none of the buf is a pointer.
 		if !v.hasPointer() {
-			return strconv.FormatInt(v.Int(), 10)
+			// Construct a fake runner, which is little endian.
+			// We only use String() for debugging, so this is is good enough
+			// (the printed value will just be slightly wrong when debugging the
+			// interp package with GOOS=mips for example).
+			r := &runner{byteOrder: binary.LittleEndian}
+			return strconv.FormatInt(v.Int(r), 10)
 		}
 	}
 	return "<[…" + strconv.Itoa(len(v.buf)) + "]>"
@@ -738,33 +747,33 @@ func (v rawValue) bytes() []byte {
 	return buf
 }

-func (v rawValue) Uint() uint64 {
+func (v rawValue) Uint(r *runner) uint64 {
 	buf := v.bytes()

 	switch len(v.buf) {
 	case 1:
 		return uint64(buf[0])
 	case 2:
-		return uint64(binary.LittleEndian.Uint16(buf))
+		return uint64(r.byteOrder.Uint16(buf))
 	case 4:
-		return uint64(binary.LittleEndian.Uint32(buf))
+		return uint64(r.byteOrder.Uint32(buf))
 	case 8:
-		return binary.LittleEndian.Uint64(buf)
+		return r.byteOrder.Uint64(buf)
 	default:
 		panic("unknown integer size")
 	}
 }

-func (v rawValue) Int() int64 {
+func (v rawValue) Int(r *runner) int64 {
 	switch len(v.buf) {
 	case 1:
-		return int64(int8(v.Uint()))
+		return int64(int8(v.Uint(r)))
 	case 2:
-		return int64(int16(v.Uint()))
+		return int64(int16(v.Uint(r)))
 	case 4:
-		return int64(int32(v.Uint()))
+		return int64(int32(v.Uint(r)))
 	case 8:
-		return int64(int64(v.Uint()))
+		return int64(int64(v.Uint(r)))
 	default:
 		panic("unknown integer size")
 	}
@@ -878,11 +887,11 @@ func (v rawValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Value,
 		var n uint64
 		switch llvmType.IntTypeWidth() {
 		case 64:
-			n = rawValue{v.buf[:8]}.Uint()
+			n = rawValue{v.buf[:8]}.Uint(mem.r)
 		case 32:
-			n = rawValue{v.buf[:4]}.Uint()
+			n = rawValue{v.buf[:4]}.Uint(mem.r)
 		case 16:
-			n = rawValue{v.buf[:2]}.Uint()
+			n = rawValue{v.buf[:2]}.Uint(mem.r)
 		case 8:
 			n = uint64(v.buf[0])
 		case 1:
@@ -951,7 +960,7 @@ func (v rawValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Value,
 		}
 		// This is either a null pointer or a raw pointer for memory-mapped I/O
 		// (such as 0xe000ed00).
-		ptr := rawValue{v.buf[:mem.r.pointerSize]}.Uint()
+		ptr := rawValue{v.buf[:mem.r.pointerSize]}.Uint(mem.r)
 		if ptr == 0 {
 			// Null pointer.
 			return llvm.ConstNull(llvmType), nil
@@ -969,11 +978,11 @@ func (v rawValue) toLLVMValue(llvmType llvm.Type, mem *memoryView) (llvm.Value,
 		}
 		return llvm.ConstIntToPtr(ptrValue, llvmType), nil
 	case llvm.DoubleTypeKind:
-		b := rawValue{v.buf[:8]}.Uint()
+		b := rawValue{v.buf[:8]}.Uint(mem.r)
 		f := math.Float64frombits(b)
 		return llvm.ConstFloat(llvmType, f), nil
 	case llvm.FloatTypeKind:
-		b := uint32(rawValue{v.buf[:4]}.Uint())
+		b := uint32(rawValue{v.buf[:4]}.Uint(mem.r))
 		f := math.Float32frombits(b)
 		return llvm.ConstFloat(llvmType, float64(f)), nil
 	default:
@@ -1065,19 +1074,19 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 			switch llvmValue.Type().IntTypeWidth() {
 			case 64:
 				var buf [8]byte
-				binary.LittleEndian.PutUint64(buf[:], n)
+				r.byteOrder.PutUint64(buf[:], n)
 				for i, b := range buf {
 					v.buf[i] = uint64(b)
 				}
 			case 32:
 				var buf [4]byte
-				binary.LittleEndian.PutUint32(buf[:], uint32(n))
+				r.byteOrder.PutUint32(buf[:], uint32(n))
 				for i, b := range buf {
 					v.buf[i] = uint64(b)
 				}
 			case 16:
 				var buf [2]byte
-				binary.LittleEndian.PutUint16(buf[:], uint16(n))
+				r.byteOrder.PutUint16(buf[:], uint16(n))
 				for i, b := range buf {
 					v.buf[i] = uint64(b)
 				}
@@ -1109,14 +1118,14 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 		case llvm.DoubleTypeKind:
 			f, _ := llvmValue.DoubleValue()
 			var buf [8]byte
-			binary.LittleEndian.PutUint64(buf[:], math.Float64bits(f))
+			r.byteOrder.PutUint64(buf[:], math.Float64bits(f))
 			for i, b := range buf {
 				v.buf[i] = uint64(b)
 			}
 		case llvm.FloatTypeKind:
 			f, _ := llvmValue.DoubleValue()
 			var buf [4]byte
-			binary.LittleEndian.PutUint32(buf[:], math.Float32bits(float32(f)))
+			r.byteOrder.PutUint32(buf[:], math.Float32bits(float32(f)))
 			for i, b := range buf {
 				v.buf[i] = uint64(b)
 			}
@@ -1166,11 +1175,11 @@ func (v localValue) asRawValue(r *runner) rawValue {
 	panic("interp: localValue.asRawValue")
 }

-func (v localValue) Uint() uint64 {
+func (v localValue) Uint(r *runner) uint64 {
 	panic("interp: localValue.Uint")
 }

-func (v localValue) Int() int64 {
+func (v localValue) Int(r *runner) int64 {
 	panic("interp: localValue.Int")
 }

@@ -1254,7 +1263,7 @@ func (r *runner) readObjectLayout(layoutValue value) (uint64, *big.Int) {
 	ptr, err := layoutValue.asPointer(r)
 	if err == errIntegerAsPointer {
 		// It's an integer, which means it's a small object or unknown.
-		layout := layoutValue.Uint()
+		layout := layoutValue.Uint(r)
 		if layout == 0 {
 			// Nil pointer, which means the layout is unknown.
 			return 0, nil
@@ -1287,7 +1296,7 @@ func (r *runner) readObjectLayout(layoutValue value) (uint64, *big.Int) {

 	// Read the object size in words and the bitmap from the global.
 	buf := r.objects[ptr.index()].buffer.(rawValue)
-	objectSizeWords := rawValue{buf: buf.buf[:r.pointerSize]}.Uint()
+	objectSizeWords := rawValue{buf: buf.buf[:r.pointerSize]}.Uint(r)
 	rawByteValues := buf.buf[r.pointerSize:]
 	rawBytes := make([]byte, len(rawByteValues))
 	for i, v := range rawByteValues {
@@ -218,7 +218,7 @@ func listGorootMergeLinks(goroot, tinygoroot string, overrides map[string]bool)
 // with the TinyGo version. This is the case on some targets.
 func needsSyscallPackage(buildTags []string) bool {
 	for _, tag := range buildTags {
-		if tag == "baremetal" || tag == "darwin" || tag == "nintendoswitch" || tag == "tinygo.wasm" {
+		if tag == "baremetal" || tag == "nintendoswitch" || tag == "tinygo.wasm" {
 			return true
 		}
 	}
@@ -229,29 +229,36 @@ func needsSyscallPackage(buildTags []string) bool {
 // means use the TinyGo version.
 func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 	paths := map[string]bool{
-		"":                      true,
-		"crypto/":               true,
-		"crypto/rand/":          false,
-		"crypto/tls/":           false,
-		"device/":               false,
-		"examples/":             false,
-		"internal/":             true,
-		"internal/binary/":      false,
-		"internal/bytealg/":     false,
-		"internal/cm/":          false,
-		"internal/fuzz/":        false,
-		"internal/reflectlite/": false,
-		"internal/task/":        false,
-		"internal/wasi/":        false,
-		"machine/":              false,
-		"net/":                  true,
-		"net/http/":             false,
-		"os/":                   true,
-		"os/user/":              false,
-		"reflect/":              false,
-		"runtime/":              false,
-		"sync/":                 true,
-		"testing/":              true,
+		"":                            true,
+		"crypto/":                     true,
+		"crypto/rand/":                false,
+		"crypto/tls/":                 false,
+		"crypto/x509/":                true,
+		"crypto/x509/internal/":       true,
+		"crypto/x509/internal/macos/": false,
+		"device/":                     false,
+		"examples/":                   false,
+		"internal/":                   true,
+		"internal/abi/":               false,
+		"internal/binary/":            false,
+		"internal/bytealg/":           false,
+		"internal/cm/":                false,
+		"internal/futex/":             false,
+		"internal/fuzz/":              false,
+		"internal/reflectlite/":       false,
+		"internal/gclayout":           false,
+		"internal/task/":              false,
+		"internal/wasi/":              false,
+		"machine/":                    false,
+		"net/":                        true,
+		"net/http/":                   false,
+		"os/":                         true,
+		"reflect/":                    false,
+		"runtime/":                    false,
+		"sync/":                       true,
+		"testing/":                    true,
+		"tinygo/":                     false,
+		"unique/":                     false,
 	}

 	if goMinor >= 19 {
@@ -180,7 +180,7 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)
 			if len(fields) >= 2 {
 				// There is some file/line/column information.
 				if n, err := strconv.Atoi(fields[len(fields)-2]); err == nil {
-					// Format: filename.go:line:colum
+					// Format: filename.go:line:column
 					pos.Filename = strings.Join(fields[:len(fields)-2], ":")
 					pos.Line = n
 					pos.Column, _ = strconv.Atoi(fields[len(fields)-1])
@@ -418,8 +418,12 @@ func (p *Package) Check() error {
 	packageName := p.ImportPath
 	if p == p.program.MainPkg() {
 		if p.Name != "main" {
-			// Sanity check. Should not ever trigger.
-			panic("expected main package to have name 'main'")
+			return Errors{p, []error{
+				scanner.Error{
+					Pos: p.program.fset.Position(p.Files[0].Name.Pos()),
+					Msg: fmt.Sprintf("expected main package to have name \"main\", not %#v", p.Name),
+				},
+			}}
 		}
 		packageName = "main"
 	}
@@ -428,7 +432,15 @@ func (p *Package) Check() error {
 		if err, ok := err.(Errors); ok {
 			return err
 		}
-		return Errors{p, typeErrors}
+		if len(typeErrors) != 0 {
+			// Got type errors, so return them.
+			return Errors{p, typeErrors}
+		}
+		// This can happen in some weird cases.
+		// The only case I know is when compiling a Go 1.23 program, with a
+		// TinyGo version that supports Go 1.23 but is compiled using Go 1.22.
+		// So this should be pretty rare.
+		return Errors{p, []error{err}}
 	}
 	p.Pkg = typesPkg

@@ -473,7 +485,7 @@ func (p *Package) parseFiles() ([]*ast.File, error) {
 		var initialCFlags []string
 		initialCFlags = append(initialCFlags, p.program.config.CFlags(true)...)
 		initialCFlags = append(initialCFlags, "-I"+p.Dir)
-		generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.ImportPath, p.program.fset, initialCFlags)
+		generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.ImportPath, p.program.fset, initialCFlags, p.program.config.GOOS())
 		p.CFlags = append(initialCFlags, cflags...)
 		p.CGoHeaders = headerCode
 		for path, hash := range accessedFiles {
--- a/Show More
+++ b/Show More