"mipsle",
	"mips64",
	"mips64le",
	"ppc64",
	"ppc64le",
	"riscv64",
	"s390x",
	"sparc64",
	"wasm",
}

// The known operating systems.
var okgoos = []string{
	"darwin",
	"dragonfly",
	"illumos",
	"ios",
	"js",
	"wasip1",
	"linux",
	"android",
	"solaris",
	"freebsd",
	"nacl", // keep;
	"netbsd",
	"openbsd",
	"plan9",
	"windows",
	"aix",
}

}

// matchTag reports whether the name is one of:
//
//	cgo (if cgo is enabled)
//	$GOOS
//	$GOARCH
//	ctxt.Compiler
//	linux (if GOOS = android)
//	solaris (if GOOS = illumos)
//	darwin (if GOOS = ios)
//	unix (if this is a Unix GOOS)
//	boringcrypto (if GOEXPERIMENT=boringcrypto is enabled)
//	tag (if tag is listed in ctxt.BuildTags, ctxt.ToolTags, or ctxt.ReleaseTags)
//

	wg.Wait()
}

// Test that reading from a pipe doesn't use up a thread.
func TestPipeThreads(t *testing.T) {
	switch runtime.GOOS {
	case "illumos", "solaris":
		t.Skip("skipping on Solaris and illumos; issue 19111")
	case "windows":
		t.Skip("skipping on Windows; issue 19098")
	case "plan9":
		t.Skip("skipping on Plan 9; does not support runtime poller")
	case "js":

#endif
needtls:
#ifdef GOOS_plan9
	// skip TLS setup on Plan 9
	JMP ok
#endif
#ifdef GOOS_solaris
	// skip TLS setup on Solaris
	JMP ok
#endif
#ifdef GOOS_illumos
	// skip TLS setup on illumos
	JMP ok
#endif
#ifdef GOOS_darwin
	// skip TLS setup on Darwin
	JMP ok
#endif
#ifdef GOOS_openbsd
	// skip TLS setup on OpenBSD
	JMP ok
#endif

#ifdef GOOS_windows

	switch runtime.GOOS {
	case "plan9":
		// Profiling unimplemented.
		return true
	case "aix":
		// See https://golang.org/issue/45170.
		return true
	case "ios", "dragonfly", "netbsd", "illumos", "solaris":
		// See https://golang.org/issue/13841.
		return true
	case "openbsd":
		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
			// See https://golang.org/issue/13841.
			return true
		}

// when executed in a deleted directory on Linux.
func TestExecInDeletedDir(t *testing.T) {
	switch runtime.GOOS {
	case "windows", "plan9",
		"aix",                // Fails with "device busy".
		"solaris", "illumos": // Fails with "invalid argument".
		t.Skipf("%v does not support removing the current working directory", runtime.GOOS)
	}
	tg := testgo(t)
	defer tg.cleanup()

	wd, err := os.Getwd()
	tg.check(err)