/*
Package cgo contains runtime support for code generated
by the cgo tool.  See the documentation for the cgo command
for details on using cgo.
*/
package cgo

/*

#cgo darwin,!arm64 LDFLAGS: -lpthread
#cgo darwin,arm64 LDFLAGS: -framework CoreFoundation
#cgo dragonfly LDFLAGS: -lpthread
#cgo freebsd LDFLAGS: -lpthread
#cgo android LDFLAGS: -llog
#cgo !android,linux LDFLAGS: -lpthread

var set_crosscall2 func()

// cgoHasExtraM is set on startup when an extra M is created for cgo.
// The extra M must be created before any C/C++ code calls cgocallback.
var cgoHasExtraM bool

// cgoUse is called by cgo-generated code (using go:linkname to get at
// an unexported name). The calls serve two purposes:
// 1) they are opaque to escape analysis, so the argument is considered to
// escape to the heap.

// Copyright 2015 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.

// This file contains tests for the cgo checker.

package testdata

// void f(void *p) {}
import "C"

import "unsafe"

func CgoTests() {
	var c chan bool
	C.f(*(*unsafe.Pointer)(unsafe.Pointer(&c))) // ERROR "embedded pointer"

Russ Cox <******@****.***> 1509125409 -0400

Carlos Amedee <******@****.***> 1715265901 -0400

! stdout CGO_CPPFLAGS|CGO_CFLAGS|CGO_CXXFLAGS|CGO_LDFLAGS

[cgo] env CGO_ENABLED=1
[cgo] env CGO_CPPFLAGS=-DFROM_CPPFLAGS=1
[cgo] env CGO_CFLAGS=-DFROM_CFLAGS=1
[cgo] env CGO_CXXFLAGS=-DFROM_CXXFLAGS=1
[cgo] env CGO_LDFLAGS=-L/extra/dir/does/not/exist
[cgo] go build '-ldflags=all=-linkmode=external -extldflags=-L/bonus/dir/does/not/exist'
[cgo] go version -m m$GOEXE

[cgo] ! go tool cgo main.go
[cgo] stderr 'cgo: input path contains newline character: .*uh-oh'
[cgo] ! exists _obj

[cgo] go tool cgo -trimpath=$PWD main.go
[cgo] grep '//line main\.go:1:1' _obj/main.cgo1.go
[cgo] ! grep 'uh-oh' _obj/main.cgo1.go
[cgo] rm _obj


# Since we do preserve $PWD (or set it appropriately) for commands, and we do

stderr 'android/amd64 requires external \(cgo\) linking, but cgo is not enabled'
! stderr 'cannot find runtime/cgo'

! go test -c -o $devnull os
stderr '# os\nandroid/amd64 requires external \(cgo\) linking, but cgo is not enabled'
! stderr 'cannot find runtime/cgo'

env GOOS=ios GOARCH=arm64 CGO_ENABLED=0

! go build -o $devnull cmd/buildid
stderr 'ios/arm64 requires external \(cgo\) linking, but cgo is not enabled'

	panic("cgo stub: cgo not available")
}

func cgoLookupCNAME(ctx context.Context, name string) (cname string, err error, completed bool) {
	panic("cgo stub: cgo not available")
}

func cgoLookupPTR(ctx context.Context, addr string) (ptrs []string, err error) {
	panic("cgo stub: cgo not available")

[compiler:gc] stderr '//go:cgo_ldflag only allowed in cgo-generated code|no Go files'

rm _cgo_yy.go

# Reject #cgo CFLAGS: -fplugin=foo.so
cp x.go.txt x.go
cp y_fplugin.go.txt y.go
! go build x
stderr 'invalid flag in #cgo CFLAGS: -fplugin=foo.so'

# Reject #cgo CFLAGS: -lbar -fplugin=foo.so
cp y_lbar_fplugin.go.txt y.go
! go build x
stderr 'invalid flag in #cgo CFLAGS: -fplugin=foo.so'

# Reject #cgo pkg-config: -foo