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cmd/go: fix TestCgoConsistentResults when using clang instead of gcc

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As Ian said at:
https://github.com/golang/go/issues/19964#issuecomment-296347750

> the -fdebug-prefix-map option is being applied to the debug info but
> not to the initial .file pseudo-op.
>
> My only current thought for how to fix this is that instead of
> compiling $WORK/a/b/foo.c, we should change the command to (cd
> $WORK/a/b && clang -g -c foo.c). We'll still want
> -fdebug-prefix-map, I think, but that should fix the .file
> pseudo-op.

This CL does that.

Fixes #19964

Change-Id: I442b1201cab9e0448fc520ab243ad364d59cd7c3
Reviewed-on: https://go-review.googlesource.com/41629
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Brad Fitzpatrick 2017-04-25 03:16:59 +00:00
parent 94dd0f0227
commit 8ae60dc1bb
1 changed files with 4 additions and 1 deletions
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5
src/cmd/go/internal/work/build.go
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@ -2977,7 +2977,10 @@ func (b *Builder) gfortran(p *load.Package, out string, flags []string, ffile st
func (b *Builder) ccompile(p *load.Package, outfile string, flags []string, file string, compiler []string) error {
file = mkAbs(p.Dir, file)
desc := p.ImportPath
output, err := b.runOut(p.Dir, desc, nil, compiler, flags, "-o", outfile, "-c", file)
if !filepath.IsAbs(outfile) {
outfile = filepath.Join(p.Dir, outfile)
}
output, err := b.runOut(filepath.Dir(file), desc, nil, compiler, flags, "-o", outfile, "-c", filepath.Base(file))
if len(output) > 0 {
// On FreeBSD 11, when we pass -g to clang 3.8 it
// invokes its internal assembler with -dwarf-version=2.