}
			args[i] = arg
		}

		switch verb {
		case "CFLAGS", "CPPFLAGS", "CXXFLAGS", "FFLAGS", "LDFLAGS":
			// Change relative paths to absolute.
			ctxt.makePathsAbsolute(args, di.Dir)
		}

		switch verb {
		case "CFLAGS":
			di.CgoCFLAGS = append(di.CgoCFLAGS, args...)
		case "CPPFLAGS":
			di.CgoCPPFLAGS = append(di.CgoCPPFLAGS, args...)

	CGO_CFLAGS
		Flags that cgo will pass to the compiler when compiling
		C code.
	CGO_CFLAGS_ALLOW
		A regular expression specifying additional flags to allow
		to appear in #cgo CFLAGS source code directives.
		Does not apply to the CGO_CFLAGS environment variable.
	CGO_CFLAGS_DISALLOW
		A regular expression specifying flags that must be disallowed

TEXT ·x(SB),0,$0
        CALL foo(SB)
        RET
`)
	write("x.c", `
void undefined();

void foo() {
        undefined();
}
`)

	cc := strings.TrimSpace(runGo("env", "CC"))
	cflags := strings.Fields(runGo("env", "GOGCCFLAGS"))

	importcfgfile := filepath.Join(tmpdir, "importcfg")
	testenv.WriteImportcfg(t, importcfgfile, nil, "runtime")

	// Compile, assemble and pack the Go and C code.

		}
	case "darwin", "ios":
		f, err := macho.Open(obj)
		if err != nil {
			t.Fatal(err)
		}
		defer f.Close()
		if f.Flags&macho.FlagDyldLink == 0 {
			t.Error("PIE must have DyldLink flag, but not")
		}
		if f.Flags&macho.FlagPIE == 0 {
			t.Error("PIE must have PIE flag, but not")
		}
	case "windows":
		f, err := pe.Open(obj)
		if err != nil {
			t.Fatal(err)

	}
	if strings.HasPrefix(s, "sizeof_") {
		return "sizeof(" + cname(s[len("sizeof_"):]) + ")"
	}
	return s
}

// ProcessCgoDirectives processes the import C preamble:
//  1. discards all #cgo CFLAGS, LDFLAGS, nocallback and noescape directives,
//     so they don't make their way into _cgo_export.h.
//  2. parse the nocallback and noescape directives.
func (f *File) ProcessCgoDirectives() {

	uc_onstack  int32
	uc_sigmask  uint32
	uc_stack    stackt
	uc_link     *ucontext
	uc_mcsize   uint64
	uc_mcontext *mcontext64
}

type keventt struct {
	ident  uint64
	filter int16
	flags  uint16
	fflags uint32
	data   int64
	udata  *byte
}

type pthread uintptr
type pthreadattr struct {
	X__sig    int64
	X__opaque [56]int8
}
type pthreadmutex struct {
	X__sig    int64

			// Generate a PIC stub. This is ugly as the stub must determine its location using
			// POWER8 or older instruction. These stubs are likely the combination of using
			// GOPPC64 < 8 and linking external objects built with CFLAGS="... -mcpu=power10 ..."
			stub.AddUint32(ctxt.Arch, OP_MFLR_R0)  // mflr r0
			stub.AddUint32(ctxt.Arch, OP_BCL_NIA)  // bcl 20,31,1f

    absl::flat_hash_set<std::string> xla_compile_and_run_allowed_devices_;
  } tf_xla_use_device_api;
};

// Flags for the XlaCallModule kernel.
struct XlaCallModuleFlags {
  // Used by XlaCallModuleOp to specify safety checks to disable.
  absl::flat_hash_set<std::string> disabled_checks;
};

// Flags for the build_xla_ops pass.
struct BuildXlaOpsPassFlags {

	"istio.io/istio/pkg/test/framework/config"
	"istio.io/istio/pkg/test/framework/label"
)

var settingsFromCommandLine = DefaultSettings()

// SettingsFromCommandLine returns settings obtained from command-line flags. config.Parse must be called before
// calling this function.
func SettingsFromCommandLine(testID string) (*Settings, error) {
	if !config.Parsed() {
		panic("config.Parse must be called before this function")
	}

//  See the License for the specific language governing permissions and
//  limitations under the License.

package istio

import (
	"flag"
)

// init registers the command-line flags that we can exposed for "go test".
func init() {
	flag.StringVar(&settingsFromCommandline.SystemNamespace, "istio.test.kube.systemNamespace", settingsFromCommandline.SystemNamespace,