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cmd/go: don't assume cc supports -gno-record-gcc-switches

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NetBSD's C compiler appears to support -fdebug-prefix-map but
not -gno-record-gcc-switches. Remove assumption that support
for the former implies the latter.

Change-Id: Iecad9e4f497ea4edc1ce440010e6fe19dc3e0566
Reviewed-on: https://go-review.googlesource.com/19686
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Damien Neil 2016-02-19 09:58:22 -08:00
parent 9a184b22ee
commit 0e34737c9a
1 changed files with 6 additions and 3 deletions
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9
src/cmd/go/build.go
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@ -2930,12 +2930,15 @@ func (b *builder) ccompilerCmd(envvar, defcmd, objdir string) []string {
// Tell gcc not to include the work directory in object files.
if b.gccSupportsFlag("-fdebug-prefix-map=a=b") {
// -gno-record-gcc-switches is supported by all gcc/clang
// versions that support -fdebug-prefix-map.
a = append(a, "-gno-record-gcc-switches")
a = append(a, "-fdebug-prefix-map="+b.work+"=/tmp/go-build")
}
// Tell gcc not to include flags in object files, which defeats the
// point of -fdebug-prefix-map above.
if b.gccSupportsFlag("-gno-record-gcc-switches") {
a = append(a, "-gno-record-gcc-switches")
}
// On OS X, some of the compilers behave as if -fno-common
// is always set, and the Mach-O linker in 6l/8l assumes this.
// See https://golang.org/issue/3253.