// (The latter cannot have C definitions, only declarations.)
	var cgo1, cgo2 bytes.Buffer
	fmt.Fprintf(&cgo1, "package main\n\n/*\n")
	fmt.Fprintf(&cgo2, "package main\n\n/*\n")

	// C code
	for _, pt := range ptrTests {
		cgo := &cgo1
		if strings.Contains(pt.support, "//export") {
			cgo = &cgo2
		}
		fmt.Fprintf(cgo, "%s\n", pt.c)
		fmt.Fprintf(&cgo1, "%s\n", pt.c1)
	}

files:

	x.cgo1.go       # for gc (cmd/compile)
	y.cgo1.go       # for gc
	_cgo_gotypes.go # for gc
	_cgo_import.go  # for gc (if -dynout _cgo_import.go)
	x.cgo2.c        # for gcc
	y.cgo2.c        # for gcc
	_cgo_defun.c    # for gcc (if -gccgo)
	_cgo_export.c   # for gcc
	_cgo_export.h   # for gcc
	_cgo_main.c     # for gcc
	_cgo_flags      # for build tool (if -gccgo)

		if n.AddError {
			fmt.Fprint(fgo2, "\te := syscall.GetErrno()\n")
			fmt.Fprint(fgo2, "\tif e != 0 {\n")
			fmt.Fprint(fgo2, "\t\treturn ")
			if !void {
				fmt.Fprint(fgo2, "r, ")
			}
			fmt.Fprint(fgo2, "e\n")
			fmt.Fprint(fgo2, "\t}\n")
			fmt.Fprint(fgo2, "\treturn ")
			if !void {
				fmt.Fprint(fgo2, "r, ")
			}
			fmt.Fprint(fgo2, "nil\n")
		} else if !void {

			"// This package implements parsing of tags like\n" +
			"// +build tag1\n" +
			"package build",
		tags:        map[string]bool{"cgo": true},
		shouldBuild: false,
	},
	{
		name: "Cgo2",
		content: "//go:build cgo\n" +
			"// Copyright The Go Authors.\n\n" +
			"// This package implements parsing of tags like\n" +
			"// +build tag1\n" +
			"package build",

// Copyright 2017 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 mycgo

import "fmt"

func go2() {
	fmt.Println("go2")

// Copyright 2017 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 mypkg

import "fmt"

func go2() {
	fmt.Println("go2")

Rob Findley <******@****.***> 1605629213 -0500

Robert Griesemer <******@****.***> 1698787325 -0700

Rob Findley <******@****.***> 1605629213 -0500

Robert Griesemer <******@****.***> 1698787325 -0700