Merge "Add support for AUTO_*_INITIALIZE to build/soong."

	pctx.StaticVariable("HostGlobalLdflags", strings.Join(hostGlobalLdflags, " "))

	pctx.StaticVariable("HostGlobalLldflags", strings.Join(hostGlobalLldflags, " "))

	pctx.StaticVariable("CommonClangGlobalCflags",

		strings.Join(append(ClangFilterUnknownCflags(commonGlobalCflags), "${ClangExtraCflags}"), " "))

	pctx.VariableFunc("CommonClangGlobalCflags", func(ctx android.PackageVarContext) string {

		flags := ClangFilterUnknownCflags(commonGlobalCflags)

		flags = append(flags, "${ClangExtraCflags}")

		// http://b/131390872

		// Automatically initialize any uninitialized stack variables.

		// Prefer zero-init if both options are set.

		if ctx.Config().IsEnvTrue("AUTO_ZERO_INITIALIZE") {

			flags = append(flags, "-ftrivial-auto-var-init=zero -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang")

		} else if ctx.Config().IsEnvTrue("AUTO_PATTERN_INITIALIZE") {

			flags = append(flags, "-ftrivial-auto-var-init=pattern")

		}

		return strings.Join(flags, " ")

	})

	pctx.VariableFunc("DeviceClangGlobalCflags", func(ctx android.PackageVarContext) string {

		if ctx.Config().Fuchsia() {

			return strings.Join(ClangFilterUnknownCflags(deviceGlobalCflags), " ")