return prefer
	}

	if tags[name] {
		return true
	}

	switch name {
	case "linux":
		return tags["android"]
	case "solaris":
		return tags["illumos"]
	case "darwin":
		return tags["ios"]
	case "unix":
		return unixOS[cfg.BuildContext.GOOS]
	default:
		return false
	}
}

// eval is like
//

}

// matchTag reports whether the name is one of:
//
//	cgo (if cgo is enabled)
//	$GOOS
//	$GOARCH
//	boringcrypto
//	ctxt.Compiler
//	linux (if GOOS == android)
//	solaris (if GOOS == illumos)
//	tag (if tag is listed in ctxt.BuildTags or ctxt.ReleaseTags)
//
// It records all consulted tags in allTags.
func (ctxt *Context) matchTag(name string, allTags map[string]bool) bool {
	if allTags != nil {

		return []string{"LD_LIBRARY_PATH"}
	case "hpux":
		return []string{"LD_LIBRARY_PATH", "SHLIB_PATH"}
	case "irix":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARYN32_PATH", "LD_LIBRARY64_PATH"}
	case "illumos", "solaris":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARY_PATH_32", "LD_LIBRARY_PATH_64"}
	case "windows":
		return []string{"SystemRoot", "COMSPEC", "PATHEXT", "WINDIR"}
	}
	return nil
}()

	instead of MADV_DONTNEED on Linux when returning memory to the
	kernel. This is more efficient, but means RSS numbers will
	drop only when the OS is under memory pressure. On the BSDs and
	Illumos/Solaris, setting madvdontneed=1 will use MADV_DONTNEED instead
	of MADV_FREE. This is less efficient, but causes RSS numbers to drop
	more quickly.

func poll_runtime_pollWait(pd *pollDesc, mode int) int {
	errcode := netpollcheckerr(pd, int32(mode))
	if errcode != pollNoError {
		return errcode
	}
	// As for now only Solaris, illumos, AIX and wasip1 use level-triggered IO.
	if GOOS == "solaris" || GOOS == "illumos" || GOOS == "aix" || GOOS == "wasip1" {
		netpollarm(pd, mode)
	}
	for !netpollblock(pd, int32(mode), false) {
		errcode = netpollcheckerr(pd, int32(mode))

			codegenArg = "-fPIC"
		} else {
			switch cfg.Goos {
			case "darwin", "ios":
				switch cfg.Goarch {
				case "arm64":
					codegenArg = "-shared"
				}

			case "dragonfly", "freebsd", "illumos", "linux", "netbsd", "openbsd", "solaris":
				// Use -shared so that the result is
				// suitable for inclusion in a PIE or
				// shared library.
				codegenArg = "-shared"
			}
		}
		cfg.ExeSuffix = ".a"

	// The following platforms could potentially be supported in the future:
	runtime.GOOS == "openbsd" || // #60614
	runtime.GOOS == "solaris" || // #60968 #60970
	runtime.GOOS == "android" || // #60967
	runtime.GOOS == "illumos" || // #65544
	// These platforms fundamentally can't be supported:
	runtime.GOOS == "js" || // #60971
	runtime.GOOS == "wasip1" || // #60971

	}
	t.Logf("gdb version %d.%d", major, minor)
}

func checkGdbPython(t *testing.T) {
	if runtime.GOOS == "solaris" || runtime.GOOS == "illumos" {
		t.Skip("skipping gdb python tests on illumos and solaris; see golang.org/issue/20821")
	}
	args := []string{"-nx", "-q", "--batch", "-iex", "python import sys; print('go gdb python support')"}
	gdbArgsFixup(args)

		t.Fatalf("Lstat %q succeeded after RemoveAll", path)
	}
}

func TestRemoveAllLongPath(t *testing.T) {
	switch runtime.GOOS {
	case "aix", "darwin", "ios", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "illumos", "solaris":
		break
	default:
		t.Skip("skipping for not implemented platforms")
	}

	prevDir, err := Getwd()
	if err != nil {
		t.Fatalf("Could not get wd: %s", err)
	}

	sfile := a.Objdir + "_buildid.s"

	var buf bytes.Buffer
	if cfg.Goos == "aix" {
		fmt.Fprintf(&buf, "\t.csect .go.buildid[XO]\n")
	} else if (cfg.Goos != "solaris" && cfg.Goos != "illumos") || assemblerIsGas() {
		fmt.Fprintf(&buf, "\t"+`.section .go.buildid,"e"`+"\n")
	} else if cfg.Goarch == "sparc" || cfg.Goarch == "sparc64" {
		fmt.Fprintf(&buf, "\t"+`.section ".go.buildid",#exclude`+"\n")