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cmd/go: introduce support for $GCCGO env var 

This variable allows users to select the compiler when using the
gccgo toolchain.

LGTM=rsc
R=rsc, iant, minux, aram
CC=axwalk, golang-codereviews
https://golang.org/cl/106700044
This commit is contained in:
Peter Collingbourne 2014-07-14 09:51:20 -04:00 committed by Russ Cox
parent 369a3ff3fd
commit 8b836fa872
1 changed files with 12 additions and 4 deletions
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16
src/cmd/go/build.go
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@ -1775,7 +1775,15 @@ func (gcToolchain) cc(b *builder, p *Package, objdir, ofile, cfile string) error
// The Gccgo toolchain.
type gccgoToolchain struct{}
var gccgoBin, _ = exec.LookPath("gccgo")
var gccgoName, gccgoBin string
func init() {
gccgoName = os.Getenv("GCCGO")
if gccgoName == "" {
gccgoName = "gccgo"
}
gccgoBin, _ = exec.LookPath(gccgoName)
}
func (gccgoToolchain) compiler() string {
return gccgoBin
@ -1796,7 +1804,7 @@ func (gccgoToolchain) gc(b *builder, p *Package, archive, obj string, importArgs
if p.localPrefix != "" {
gcargs = append(gcargs, "-fgo-relative-import-path="+p.localPrefix)
}
args := stringList("gccgo", importArgs, "-c", gcargs, "-o", ofile, buildGccgoflags)
args := stringList(gccgoName, importArgs, "-c", gcargs, "-o", ofile, buildGccgoflags)
for _, f := range gofiles {
args = append(args, mkAbs(p.Dir, f))
}
@ -1812,7 +1820,7 @@ func (gccgoToolchain) asm(b *builder, p *Package, obj, ofile, sfile string) erro
defs = append(defs, `-D`, `GOPKGPATH="`+pkgpath+`"`)
}
defs = append(defs, b.gccArchArgs()...)
return b.run(p.Dir, p.ImportPath, nil, "gccgo", "-I", obj, "-o", ofile, defs, sfile)
return b.run(p.Dir, p.ImportPath, nil, gccgoName, "-I", obj, "-o", ofile, defs, sfile)
}
func (gccgoToolchain) pkgpath(basedir string, p *Package) string {
@ -1889,7 +1897,7 @@ func (tools gccgoToolchain) ld(b *builder, p *Package, out string, allactions []
if objc {
ldflags = append(ldflags, "-lobjc")
}
return b.run(".", p.ImportPath, nil, "gccgo", "-o", out, ofiles, "-Wl,-(", ldflags, "-Wl,-)", buildGccgoflags)
return b.run(".", p.ImportPath, nil, gccgoName, "-o", out, ofiles, "-Wl,-(", ldflags, "-Wl,-)", buildGccgoflags)
}
func (gccgoToolchain) cc(b *builder, p *Package, objdir, ofile, cfile string) error {