t.Error(err)
	}
	for _, feature := range features {
		if _, ok := mandatory[feature]; ok {
			mandatory[feature] = true
		}
		if flag, ok := mapping[feature]; ok {
			if !*flag {
				t.Errorf("feature '%v' not detected", feature)
			}
		} else {
			t.Logf("no entry for '%v'", feature)
		}
	}
	for k, v := range mandatory {
		if !v {
			t.Errorf("mandatory feature '%v' not detected", k)
		}
	}

        when:
        def feature = createFeature("feature")

        then:
        feature.name == "feature"
        feature.sourceSet == ext.sourceSets.getByName('feature')
        feature.runtimeClasspathConfiguration == project.configurations.getByName('featureRuntimeClasspath')
        feature.compileClasspathConfiguration == project.configurations.getByName('featureCompileClasspath')

    def "can publish java-library with feature using extension"() {
        mavenRepo.module('org', 'optionaldep', '1.0').withModuleMetadata().publish()

        given:
        buildFile << """

            sourceSets {
                feature
            }

            repositories { maven { url "${mavenRepo.uri}" } }

            java {
                registerFeature("feature") {

	// initialzation, it can flip the support at runtime.
	Supports(feature storage.Feature) bool
	// CheckClient works with etcd client to recalcualte feature support and cache it internally.
	// All etcd clients should support feature to cause `Supports` return true.
	// If client A supports and client B doesn't support the feature, the `Supports` will
	// first return true at client A initializtion and then return false on client B

# Feature Coverage Reporting

## Overview

The features package defines values that are used to track feature coverage at eng.istio.io

## Labeling a Test

		{Name: "aesctr", Feature: &S390X.HasAESCTR},
		{Name: "aesgcm", Feature: &S390X.HasAESGCM},
		{Name: "ghash", Feature: &S390X.HasGHASH},
		{Name: "sha1", Feature: &S390X.HasSHA1},
		{Name: "sha256", Feature: &S390X.HasSHA256},
		{Name: "sha3", Feature: &S390X.HasSHA3},
		{Name: "sha512", Feature: &S390X.HasSHA512},
		{Name: "vx", Feature: &S390X.HasVX},
		{Name: "vxe", Feature: &S390X.HasVXE},
	}
}

         */
        private static EnumSet<Feature> activeFeatures() {
            EnumSet<Feature> activeFeatures = EnumSet.noneOf(Feature.class);
            for (Feature feature : Feature.values()) {
                if (feature.isActive()) {
                    activeFeatures.add(feature);
                }
            }
            return activeFeatures;
        }

		{Name: "vfpv3d16", Feature: &ARM.HasVFPv3D16},
		{Name: "vfpv4", Feature: &ARM.HasVFPv4},
		{Name: "half", Feature: &ARM.HasHALF},
		{Name: "26bit", Feature: &ARM.Has26BIT},
		{Name: "fastmul", Feature: &ARM.HasFASTMUL},
		{Name: "fpa", Feature: &ARM.HasFPA},
		{Name: "edsp", Feature: &ARM.HasEDSP},
		{Name: "java", Feature: &ARM.HasJAVA},
		{Name: "iwmmxt", Feature: &ARM.HasIWMMXT},
		{Name: "crunch", Feature: &ARM.HasCRUNCH},

)

var maxExtendedFunctionInformation uint32

func doinit() {
	options = []option{
		{Name: "adx", Feature: &X86.HasADX},
		{Name: "aes", Feature: &X86.HasAES},
		{Name: "erms", Feature: &X86.HasERMS},
		{Name: "pclmulqdq", Feature: &X86.HasPCLMULQDQ},
		{Name: "rdtscp", Feature: &X86.HasRDTSCP},
		{Name: "sha", Feature: &X86.HasSHA},
	}
	level := getGOAMD64level()
	if level < 2 {

func doinit() {
	options = []option{
		{Name: "aes", Feature: &ARM64.HasAES},
		{Name: "pmull", Feature: &ARM64.HasPMULL},
		{Name: "sha1", Feature: &ARM64.HasSHA1},
		{Name: "sha2", Feature: &ARM64.HasSHA2},
		{Name: "sha512", Feature: &ARM64.HasSHA512},
		{Name: "crc32", Feature: &ARM64.HasCRC32},
		{Name: "atomics", Feature: &ARM64.HasATOMICS},
		{Name: "cpuid", Feature: &ARM64.HasCPUID},