blob: 1de2c4eccd8a70704236e736dbf49b52ffa51718 [file] [log] [blame]
// 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)
}