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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 linkage to the desired libraries. The main function is provided by
_cgo_main.c: _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) { } void crosscall2(void(*fn)(void*), void *a, int c, uintptr_t ctxt) { }
uintptr_t _cgo_wait_runtime_init_done(void) { return 0; } uintptr_t _cgo_wait_runtime_init_done(void) { return 0; }
void _cgo_release_context(uintptr_t ctxt) { } 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. // Write C main file for using gcc to resolve imports.
fmt.Fprintf(fm, "#include <stddef.h>\n") // For size_t below. 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 { 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, "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") fmt.Fprintf(fm, "size_t _cgo_wait_runtime_init_done(void) { return 0; }\n")