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cmd/go: cgo for Linux/ARM

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Part 4 of CL 5601044 (cgo: Linux/ARM support)

R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/5989058
This commit is contained in:
Shenghou Ma 2012-05-04 18:29:40 +08:00
parent 9602dd5e87
commit e7a0a7595a
1 changed files with 8 additions and 0 deletions
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8
src/cmd/go/build.go
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@ -1394,6 +1394,8 @@ func (b *builder) gccCmd(objdir string) []string {
a = append(a, "-m32") a = append(a, "-m32")
case "6": case "6":
a = append(a, "-m64") a = append(a, "-m64")
case "5":
a = append(a, "-marm") // not thumb
} }
// gcc-4.5 and beyond require explicit "-pthread" flag // gcc-4.5 and beyond require explicit "-pthread" flag
// for multithreading with pthread library. // for multithreading with pthread library.
@ -1513,9 +1515,15 @@ func (b *builder) cgo(p *Package, cgoExe, obj string, gccfiles []string) (outGo,
outObj = append(outObj, ofile) outObj = append(outObj, ofile)
} }
dynobj := obj + "_cgo_.o" dynobj := obj + "_cgo_.o"
if goarch == "arm" && goos == "linux" { // we need to use -pie for Linux/ARM to get accurate imported sym
cgoLDFLAGS = append(cgoLDFLAGS, "-pie")
}
if err := b.gccld(p, dynobj, cgoLDFLAGS, linkobj); err != nil { if err := b.gccld(p, dynobj, cgoLDFLAGS, linkobj); err != nil {
return nil, nil, err return nil, nil, err
} }
if goarch == "arm" && goos == "linux" { // but we don't need -pie for normal cgo programs
cgoLDFLAGS = cgoLDFLAGS[0 : len(cgoLDFLAGS)-1]
}
if _, ok := buildToolchain.(gccgcToolchain); ok { if _, ok := buildToolchain.(gccgcToolchain); ok {
// we don't use dynimport when using gccgo. // we don't use dynimport when using gccgo.