// The test file is however a useful example of fused-vs-cascaded multiply-add.
func TestFmaHash(t *testing.T) {
	switch runtime.GOOS {
	case "linux", "darwin":
	default:
		t.Skipf("Slow test, usually avoid it, os=%s not linux or darwin", runtime.GOOS)
	}
	switch runtime.GOARCH {
	case "amd64", "arm64":
	default:
		t.Skipf("Slow test, usually avoid it, arch=%s not amd64 or arm64", runtime.GOARCH)
	}

// goodOSArchFile returns false if the name contains a $GOOS or $GOARCH
// suffix which does not match the current system.
// The recognized name formats are:
//
//	name_$(GOOS).*
//	name_$(GOARCH).*
//	name_$(GOOS)_$(GOARCH).*
//	name_$(GOOS)_test.*
//	name_$(GOARCH)_test.*
//	name_$(GOOS)_$(GOARCH)_test.*
//
// Exceptions:
// if GOOS=android, then files with GOOS=linux are also matched.

// conditions.
func DefaultConds() map[string]Cond {
	conds := make(map[string]Cond)

	conds["GOOS"] = PrefixCondition(
		"runtime.GOOS == <suffix>",
		func(_ *State, suffix string) (bool, error) {
			if suffix == runtime.GOOS {
				return true, nil
			}
			if _, ok := imports.KnownOS[suffix]; !ok {
				return false, fmt.Errorf("unrecognized GOOS %q", suffix)
			}
			return false, nil
		})

	conds["GOARCH"] = PrefixCondition(

env GOOS=android GOARCH=amd64 CGO_ENABLED=0

! go build -o $devnull cmd/buildid
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

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build android

package goos

const GOOS = `android`

const IsAix = 0
const IsAndroid = 1
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build ios

package goos

const GOOS = `ios`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 1
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0
const IsWasip1 = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build !android && linux

package goos

const GOOS = `linux`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 1
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build netbsd

package goos

const GOOS = `netbsd`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 1
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build plan9

package goos

const GOOS = `plan9`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 1
const IsSolaris = 0

# Do the files need to exist outside GOPATH?
cp $GOPATH/src/standalone_benchmark_test.go $WORK/tmp/standalone_benchmark_test.go
go test -run '^$' -bench . $WORK/tmp/standalone_benchmark_test.go
stdout '^goos: '$GOOS
stdout '^goarch: '$GOARCH
! stdout '^pkg:'
! stderr '^pkg:'

-- standalone_benchmark_test.go --
package standalone_benchmark

import "testing"

func Benchmark(b *testing.B) {