| // Copyright 2012 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "bytes" |
| "fmt" |
| "os" |
| "sort" |
| ) |
| |
| /* |
| * Helpers for building cmd/go and cmd/cgo. |
| */ |
| |
| // mkzdefaultcc writes zdefaultcc.go: |
| // |
| // package main |
| // const defaultCC = <defaultcc> |
| // const defaultCXX = <defaultcxx> |
| // const defaultPkgConfig = <defaultpkgconfig> |
| // |
| // It is invoked to write cmd/go/zdefaultcc.go |
| // but we also write cmd/cgo/zdefaultcc.go |
| func mkzdefaultcc(dir, file string) { |
| outGo := fmt.Sprintf( |
| "// auto generated by go tool dist\n"+ |
| "\n"+ |
| "package cfg\n"+ |
| "\n"+ |
| "const DefaultCC = `%s`\n"+ |
| "const DefaultCXX = `%s`\n"+ |
| "const DefaultPkgConfig = `%s`\n", |
| defaultcctarget, defaultcxxtarget, defaultpkgconfigtarget) |
| |
| writefile(outGo, file, writeSkipSame) |
| |
| // Convert file name to replace: turn go/internal/cfg into cgo. |
| outCgo := fmt.Sprintf( |
| "// auto generated by go tool dist\n"+ |
| "\n"+ |
| "package main\n"+ |
| "\n"+ |
| "const defaultCC = `%s`\n"+ |
| "const defaultCXX = `%s`\n"+ |
| "const defaultPkgConfig = `%s`\n", |
| defaultcctarget, defaultcxxtarget, defaultpkgconfigtarget) |
| |
| i := len(file) - len("go/internal/cfg/zdefaultcc.go") |
| file = file[:i] + "cgo/zdefaultcc.go" |
| writefile(outCgo, file, writeSkipSame) |
| } |
| |
| // mkzcgo writes zosarch.go for cmd/go. |
| func mkzosarch(dir, file string) { |
| // sort for deterministic zosarch.go file |
| var list []string |
| for plat := range cgoEnabled { |
| list = append(list, plat) |
| } |
| sort.Strings(list) |
| |
| var buf bytes.Buffer |
| buf.WriteString("// auto generated by go tool dist\n\n") |
| buf.WriteString("package cfg\n\n") |
| fmt.Fprintf(&buf, "var OSArchSupportsCgo = map[string]bool{\n") |
| for _, plat := range list { |
| fmt.Fprintf(&buf, "\t%q: %v,\n", plat, cgoEnabled[plat]) |
| } |
| fmt.Fprintf(&buf, "}\n") |
| writefile(buf.String(), file, writeSkipSame) |
| } |
| |
| // mkzcgo writes zcgo.go for the go/build package: |
| // |
| // package build |
| // var cgoEnabled = map[string]bool{} |
| // |
| // It is invoked to write go/build/zcgo.go. |
| func mkzcgo(dir, file string) { |
| // sort for deterministic zcgo.go file |
| var list []string |
| for plat, hasCgo := range cgoEnabled { |
| if hasCgo { |
| list = append(list, plat) |
| } |
| } |
| sort.Strings(list) |
| |
| var buf bytes.Buffer |
| |
| fmt.Fprintf(&buf, |
| "// auto generated by go tool dist\n"+ |
| "\n"+ |
| "package build\n"+ |
| "\n"+ |
| "const defaultCGO_ENABLED = %q\n\n"+ |
| "var cgoEnabled = map[string]bool{\n", os.Getenv("CGO_ENABLED")) |
| for _, plat := range list { |
| fmt.Fprintf(&buf, "\t%q: true,\n", plat) |
| } |
| fmt.Fprintf(&buf, "}") |
| |
| writefile(buf.String(), file, writeSkipSame) |
| } |