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// 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"
"path/filepath"
"sort"
"strings"
)
/*
* 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/internal/cfg/zdefaultcc.go
// but we also write cmd/cgo/zdefaultcc.go
func mkzdefaultcc(dir, file string) {
if strings.Contains(file, filepath.FromSlash("go/internal/cfg")) {
var buf bytes.Buffer
fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "package cfg\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "const DefaultPkgConfig = `%s`\n", defaultpkgconfig)
buf.WriteString(defaultCCFunc("DefaultCC", defaultcc))
buf.WriteString(defaultCCFunc("DefaultCXX", defaultcxx))
writefile(buf.String(), file, writeSkipSame)
return
}
var buf bytes.Buffer
fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "package main\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "const defaultPkgConfig = `%s`\n", defaultpkgconfig)
buf.WriteString(defaultCCFunc("defaultCC", defaultcc))
buf.WriteString(defaultCCFunc("defaultCXX", defaultcxx))
writefile(buf.String(), file, writeSkipSame)
}
func defaultCCFunc(name string, defaultcc map[string]string) string {
var buf bytes.Buffer
fmt.Fprintf(&buf, "func %s(goos, goarch string) string {\n", name)
fmt.Fprintf(&buf, "\tswitch goos+`/`+goarch {\n")
var keys []string
for k := range defaultcc {
if k != "" {
keys = append(keys, k)
}
}
sort.Strings(keys)
for _, k := range keys {
fmt.Fprintf(&buf, "\tcase %q:\n\t\treturn %q\n", k, defaultcc[k])
}
fmt.Fprintf(&buf, "\t}\n")
fmt.Fprintf(&buf, "\treturn %q\n", defaultcc[""])
fmt.Fprintf(&buf, "}\n")
return buf.String()
}
// 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
fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n\n")
fmt.Fprintf(&buf, "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, "// Code generated by go tool dist; DO NOT EDIT.\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "package build\n")
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "const defaultCGO_ENABLED = %q\n", os.Getenv("CGO_ENABLED"))
fmt.Fprintln(&buf)
fmt.Fprintf(&buf, "var cgoEnabled = map[string]bool{\n")
for _, plat := range list {
fmt.Fprintf(&buf, "\t%q: true,\n", plat)
}
fmt.Fprintf(&buf, "}\n")
writefile(buf.String(), file, writeSkipSame)
}
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