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compiler: emit an error when the actual arch doesn't match GOARCH

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See: https://github.com/tinygo-org/tinygo/issues/4959
This makes sure to emit an error instead of generating inline assembly,
which leads to hard-to-debug linker errors. Instead, it will now produce
errors like the following:

    # golang.org/x/sys/unix
    ../../../../pkg/mod/golang.org/x/sys@v0.0.0-20220722155257-8c9f86f7a55f/unix/affinity_linux.go:20:23: system calls are not supported: target emulates a linux/arm system on wasm32
    ../../../../pkg/mod/golang.org/x/sys@v0.0.0-20220722155257-8c9f86f7a55f/unix/fcntl.go:17:29: system calls are not supported: target emulates a linux/arm system on wasm32
    ../../../../pkg/mod/golang.org/x/sys@v0.0.0-20220722155257-8c9f86f7a55f/unix/fcntl.go:32:24: system calls are not supported: target emulates a linux/arm system on wasm32
This commit is contained in:
Ayke van Laethem
2025-09-24 13:25:54 +02:00
committed by Ron Evans
parent 35e6b8a67d
commit 48d741f68a
1 changed files with 8 additions and 0 deletions
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compiler/syscall.go
+8
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@@ -74,6 +74,14 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
return b.CreateCall(fnType, target, args, ""), nil
case b.GOARCH == "arm" && b.GOOS == "linux":
if arch := b.archFamily(); arch != "arm" {
// Some targets pretend to be linux/arm for compatibility but aren't
// actually such a system. Make sure we emit an error instead of
// creating inline assembly that will fail to compile.
// See: https://github.com/tinygo-org/tinygo/issues/4959
return llvm.Value{}, b.makeError(call.Pos(), "system calls are not supported: target emulates a linux/arm system on "+arch)
}
// Implement the EABI system call convention for Linux.
// Source: syscall(2) man page.
args := []llvm.Value{}