// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"strings"
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)
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/*
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* Helpers for building cmd/go and cmd/cgo.
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*/
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// mkzdefaultcc writes zdefaultcc.go:
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//
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// package main
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// const defaultCC = <defaultcc>
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// const defaultCXX = <defaultcxx>
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// const defaultPkgConfig = <defaultpkgconfig>
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//
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// It is invoked to write cmd/go/internal/cfg/zdefaultcc.go
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// but we also write cmd/cgo/zdefaultcc.go
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func mkzdefaultcc(dir, file string) {
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if strings.Contains(file, filepath.FromSlash("go/internal/cfg")) {
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package cfg\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const DefaultPkgConfig = `%s`\n", defaultpkgconfig)
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buf.WriteString(defaultCCFunc("DefaultCC", defaultcc))
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buf.WriteString(defaultCCFunc("DefaultCXX", defaultcxx))
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writefile(buf.String(), file, writeSkipSame)
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return
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}
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package main\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const defaultPkgConfig = `%s`\n", defaultpkgconfig)
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buf.WriteString(defaultCCFunc("defaultCC", defaultcc))
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buf.WriteString(defaultCCFunc("defaultCXX", defaultcxx))
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writefile(buf.String(), file, writeSkipSame)
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}
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func defaultCCFunc(name string, defaultcc map[string]string) string {
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "func %s(goos, goarch string) string {\n", name)
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fmt.Fprintf(&buf, "\tswitch goos+`/`+goarch {\n")
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var keys []string
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for k := range defaultcc {
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if k != "" {
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keys = append(keys, k)
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}
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}
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sort.Strings(keys)
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for _, k := range keys {
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fmt.Fprintf(&buf, "\tcase %q:\n\t\treturn %q\n", k, defaultcc[k])
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}
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fmt.Fprintf(&buf, "\t}\n")
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fmt.Fprintf(&buf, "\treturn %q\n", defaultcc[""])
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fmt.Fprintf(&buf, "}\n")
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return buf.String()
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}
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// mkzcgo writes zosarch.go for cmd/go.
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func mkzosarch(dir, file string) {
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// sort for deterministic zosarch.go file
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var list []string
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for plat := range cgoEnabled {
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list = append(list, plat)
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}
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sort.Strings(list)
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n\n")
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fmt.Fprintf(&buf, "package cfg\n\n")
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fmt.Fprintf(&buf, "var OSArchSupportsCgo = map[string]bool{\n")
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for _, plat := range list {
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fmt.Fprintf(&buf, "\t%q: %v,\n", plat, cgoEnabled[plat])
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}
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fmt.Fprintf(&buf, "}\n")
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writefile(buf.String(), file, writeSkipSame)
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}
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// mkzcgo writes zcgo.go for the go/build package:
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//
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// package build
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// var cgoEnabled = map[string]bool{}
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//
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// It is invoked to write go/build/zcgo.go.
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func mkzcgo(dir, file string) {
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// sort for deterministic zcgo.go file
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var list []string
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for plat, hasCgo := range cgoEnabled {
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if hasCgo {
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list = append(list, plat)
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}
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}
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sort.Strings(list)
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package build\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const defaultCGO_ENABLED = %q\n", os.Getenv("CGO_ENABLED"))
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "var cgoEnabled = map[string]bool{\n")
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for _, plat := range list {
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fmt.Fprintf(&buf, "\t%q: true,\n", plat)
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}
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fmt.Fprintf(&buf, "}\n")
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writefile(buf.String(), file, writeSkipSame)
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}
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