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wasm: update wasi-libc dependency

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The latest version allows overriding the default CFLAGS. By default,
they're `-O2 -DNDEBUG`, thus not including DWARF debug information. This
commit changes this to include the `-g` flag.

Apart from an improved debug experience, this lets -size=full attribute
code to wasi-libc.

Before:

    $ tinygo build -o test.wasm -size=full ./testdata/alias.go
       code  rodata    data     bss |   flash     ram | package
    ------------------------------- | --------------- | -------
       1780       0     188  130733 |    1968  130921 | (unknown)
         84       0       0       0 |      84       0 | internal/task
        281       0       0       0 |     281       0 | main
       2374       0       4     147 |    2378     151 | runtime
    ------------------------------- | --------------- | -------
       4519       0     192  130880 |    4711  131072 | total

After:

    $ tinygo build -o test.wasm -size=full ./testdata/alias.go
       code  rodata    data     bss |   flash     ram | package
    ------------------------------- | --------------- | -------
         40       0     188  130733 |     228  130921 | (unknown)
       1740       0       0       0 |    1740       0 | C wasi-libc
         84       0       0       0 |      84       0 | internal/task
        281       0       0       0 |     281       0 | main
       2374       0       4     147 |    2378     151 | runtime
    ------------------------------- | --------------- | -------
       4519       0     192  130880 |    4711  131072 | total

The main difference here is the `(unknown)` code, which turns out to be
mostly wasi-libc in this trivial example.
This commit is contained in:
Ayke van Laethem
2021-11-03 23:25:29 +01:00
committed by Ron Evans
parent 403d93560b
commit 6c9bb96bca
2 changed files with 2 additions and 2 deletions
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Makefile
+1 -1
View File
@@ -175,7 +175,7 @@ $(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja
wasi-libc: lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a
lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
@if [ ! -e lib/wasi-libc/Makefile ]; then echo "Submodules have not been downloaded. Please download them using:\n git submodule update --init"; exit 1; fi
cd lib/wasi-libc && make -j4 WASM_CC=$(CLANG) WASM_AR=$(LLVM_AR) WASM_NM=$(LLVM_NM)
cd lib/wasi-libc && make -j4 WASM_CFLAGS="-O2 -g -DNDEBUG" WASM_CC=$(CLANG) WASM_AR=$(LLVM_AR) WASM_NM=$(LLVM_NM)
# Build the Go compiler.
lib/wasi-libc
+1 -1
Submodule lib/wasi-libc updated: 215adc8ac9...ad5133410f