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cmd/cgo: use full prototype for main in C code

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Avoids pedantic errors from modern C compilers.

Fixes #70769

Change-Id: Ibe0d9960e998eb0346b97d7bd69eb7de0d0e6c60
Reviewed-on: https://go-review.googlesource.com/c/go/+/635095
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Ian Lance Taylor 2024-12-10 20:05:06 -08:00 • committed by Gopher Robot
parent 0ca521f9c1
commit fafd4477f3
2 changed files with 2 additions and 2 deletions
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2
src/cmd/cgo/doc.go
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@ -796,7 +796,7 @@ Instead, the build process generates an object file using dynamic
linkage to the desired libraries. The main function is provided by
_cgo_main.c:
int main() { return 0; }
int main(int argc, char **argv) { return 0; }
void crosscall2(void(*fn)(void*), void *a, int c, uintptr_t ctxt) { }
uintptr_t _cgo_wait_runtime_init_done(void) { return 0; }
void _cgo_release_context(uintptr_t ctxt) { }

2
src/cmd/cgo/out.go
View file

@ -59,7 +59,7 @@ func (p *Package) writeDefs() {
// Write C main file for using gcc to resolve imports.
fmt.Fprintf(fm, "#include <stddef.h>\n") // For size_t below.
fmt.Fprintf(fm, "int main() { return 0; }\n")
fmt.Fprintf(fm, "int main(int argc __attribute__((unused)), char **argv __attribute__((unused))) { return 0; }\n")
if *importRuntimeCgo {
fmt.Fprintf(fm, "void crosscall2(void(*fn)(void*) __attribute__((unused)), void *a __attribute__((unused)), int c __attribute__((unused)), size_t ctxt __attribute__((unused))) { }\n")
fmt.Fprintf(fm, "size_t _cgo_wait_runtime_init_done(void) { return 0; }\n")