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https://github.com/golang/go
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cmd/go: support -buildmode=c-shared for gccgo
Change-Id: I4cdfd5a59e0468e9e5400aa06334b21cc80913cd Reviewed-on: https://go-review.googlesource.com/9550 Reviewed-by: David Crawshaw <crawshaw@golang.org>
This commit is contained in:
Ian Lance Taylor
parent
125ed11c0a
commit
6c0f9c9e30
@ -308,6 +308,7 @@ func pkgsNotMain(pkgs []*Package) (res []*Package) {
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var pkgsFilter = func(pkgs []*Package) []*Package { return pkgs }
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func buildModeInit() {
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_, gccgo := buildToolchain.(gccgoToolchain)
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var codegenArg string
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platform := goos + "/" + goarch
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switch buildBuildmode {
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@ -324,14 +325,18 @@ func buildModeInit() {
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ldBuildmode = "c-archive"
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case "c-shared":
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pkgsFilter = pkgsMain
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switch platform {
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case "linux/amd64":
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codegenArg = "-shared"
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case "linux/arm":
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buildAsmflags = append(buildAsmflags, "-shared")
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case "android/arm":
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default:
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fatalf("-buildmode=c-shared not supported on %s\n", platform)
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if gccgo {
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codegenArg = "-fPIC"
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} else {
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switch platform {
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case "linux/amd64":
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codegenArg = "-shared"
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case "linux/arm":
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buildAsmflags = append(buildAsmflags, "-shared")
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case "android/arm":
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default:
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fatalf("-buildmode=c-shared not supported on %s\n", platform)
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}
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}
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ldBuildmode = "c-shared"
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case "default":
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@ -341,31 +346,43 @@ func buildModeInit() {
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ldBuildmode = "exe"
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case "shared":
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pkgsFilter = pkgsNotMain
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switch platform {
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case "linux/amd64":
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default:
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fatalf("-buildmode=shared not supported on %s\n", platform)
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if gccgo {
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codegenArg = "-fPIC"
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} else {
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switch platform {
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case "linux/amd64":
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default:
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fatalf("-buildmode=shared not supported on %s\n", platform)
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}
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codegenArg = "-dynlink"
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}
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if *buildO != "" {
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fatalf("-buildmode=shared and -o not supported together")
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}
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codegenArg = "-dynlink"
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ldBuildmode = "shared"
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default:
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fatalf("buildmode=%s not supported", buildBuildmode)
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}
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if buildLinkshared {
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if platform != "linux/amd64" {
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fmt.Fprintf(os.Stderr, "go %s: -linkshared is only supported on linux/amd64\n", flag.Args()[0])
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os.Exit(2)
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if gccgo {
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codegenArg = "-fPIC"
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} else {
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if platform != "linux/amd64" {
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fmt.Fprintf(os.Stderr, "go %s: -linkshared is only supported on linux/amd64\n", flag.Args()[0])
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os.Exit(2)
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}
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codegenArg = "-dynlink"
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// TODO(mwhudson): remove -w when that gets fixed in linker.
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buildLdflags = append(buildLdflags, "-linkshared", "-w")
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}
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codegenArg = "-dynlink"
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// TODO(mwhudson): remove -w when that gets fixed in linker.
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buildLdflags = append(buildLdflags, "-linkshared", "-w")
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}
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if codegenArg != "" {
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buildAsmflags = append(buildAsmflags, codegenArg)
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buildGcflags = append(buildGcflags, codegenArg)
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if gccgo {
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buildGccgoflags = append(buildGccgoflags, codegenArg)
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} else {
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buildAsmflags = append(buildAsmflags, codegenArg)
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buildGcflags = append(buildGcflags, codegenArg)
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}
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if buildContext.InstallSuffix != "" {
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buildContext.InstallSuffix += "_"
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}
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@ -2166,6 +2183,7 @@ func (tools gccgoToolchain) asm(b *builder, p *Package, obj, ofile, sfile string
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if pkgpath := gccgoCleanPkgpath(p); pkgpath != "" {
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defs = append(defs, `-D`, `GOPKGPATH="`+pkgpath+`"`)
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}
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defs = tools.maybePIC(defs)
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defs = append(defs, b.gccArchArgs()...)
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return b.run(p.Dir, p.ImportPath, nil, tools.compiler(), "-I", obj, "-o", ofile, defs, sfile)
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}
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@ -2244,13 +2262,15 @@ func (tools gccgoToolchain) ld(b *builder, p *Package, out string, allactions []
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}
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}
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if ldBuildmode == "c-archive" {
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switch ldBuildmode {
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case "c-archive", "c-shared":
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ldflags = append(ldflags, "-Wl,--whole-archive")
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}
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ldflags = append(ldflags, afiles...)
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if ldBuildmode == "c-archive" {
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switch ldBuildmode {
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case "c-archive", "c-shared":
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ldflags = append(ldflags, "-Wl,--no-whole-archive")
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}
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@ -2266,12 +2286,6 @@ func (tools gccgoToolchain) ld(b *builder, p *Package, out string, allactions []
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if usesCgo && goos == "linux" {
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ldflags = append(ldflags, "-Wl,-E")
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}
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if cxx {
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ldflags = append(ldflags, "-lstdc++")
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}
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if objc {
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ldflags = append(ldflags, "-lobjc")
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}
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case "c-archive":
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// Link the Go files into a single .o, and also link
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@ -2296,10 +2310,23 @@ func (tools gccgoToolchain) ld(b *builder, p *Package, out string, allactions []
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realOut = out
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out = out + ".o"
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case "c-shared":
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ldflags = append(ldflags, "-shared", "-nostdlib", "-Wl,--whole-archive", "-lgolibbegin", "-Wl,--no-whole-archive", "-lgo", "-lgcc_s", "-lgcc")
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default:
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fatalf("-buildmode=%s not supported for gccgo", ldBuildmode)
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}
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switch ldBuildmode {
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case "exe", "c-shared":
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if cxx {
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ldflags = append(ldflags, "-lstdc++")
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}
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if objc {
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ldflags = append(ldflags, "-lobjc")
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}
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}
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if err := b.run(".", p.ImportPath, nil, tools.linker(), "-o", out, ofiles, ldflags, buildGccgoflags); err != nil {
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return err
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}
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@ -2314,7 +2341,7 @@ func (tools gccgoToolchain) ld(b *builder, p *Package, out string, allactions []
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return nil
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}
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func (gccgoToolchain) cc(b *builder, p *Package, objdir, ofile, cfile string) error {
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func (tools gccgoToolchain) cc(b *builder, p *Package, objdir, ofile, cfile string) error {
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inc := filepath.Join(goroot, "pkg", "include")
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cfile = mkAbs(p.Dir, cfile)
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defs := []string{"-D", "GOOS_" + goos, "-D", "GOARCH_" + goarch}
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@ -2326,10 +2353,20 @@ func (gccgoToolchain) cc(b *builder, p *Package, objdir, ofile, cfile string) er
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case "386", "amd64":
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defs = append(defs, "-fsplit-stack")
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}
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defs = tools.maybePIC(defs)
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return b.run(p.Dir, p.ImportPath, nil, envList("CC", defaultCC), "-Wall", "-g",
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"-I", objdir, "-I", inc, "-o", ofile, defs, "-c", cfile)
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}
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// maybePIC adds -fPIC to the list of arguments if needed.
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func (tools gccgoToolchain) maybePIC(args []string) []string {
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switch buildBuildmode {
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case "c-shared", "shared":
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args = append(args, "-fPIC")
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}
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return args
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}
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func gccgoPkgpath(p *Package) string {
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if p.build.IsCommand() && !p.forceLibrary {
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return ""
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