diff --git a/aconfig/codegen/aconfig_declarations_group.go b/aconfig/codegen/aconfig_declarations_group.go
index 33c20cd..13daf47 100644
--- a/aconfig/codegen/aconfig_declarations_group.go
+++ b/aconfig/codegen/aconfig_declarations_group.go
@@ -39,11 +39,6 @@
 	android.DefaultableModuleBase
 
 	properties AconfigDeclarationsGroupProperties
-
-	aconfigDeclarationNames      []string
-	intermediateCacheOutputPaths android.Paths
-	javaSrcjars                  android.Paths
-	modeInfos                    map[string]android.ModeInfo
 }
 
 type AconfigDeclarationsGroupProperties struct {
@@ -76,53 +71,45 @@
 	ctx.AddDependency(ctx.Module(), rustAconfigLibraryTag, adg.properties.Rust_aconfig_libraries...)
 }
 
-func (adg *AconfigDeclarationsGroup) VisitDeps(ctx android.ModuleContext) {
-	adg.modeInfos = make(map[string]android.ModeInfo)
+func (adg *AconfigDeclarationsGroup) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	modeInfos := make(map[string]android.ModeInfo)
+	var aconfigDeclarationNames []string
+	var intermediateCacheOutputPaths android.Paths
+	var javaSrcjars android.Paths
 	ctx.VisitDirectDeps(func(dep android.Module) {
 		tag := ctx.OtherModuleDependencyTag(dep)
 		if provider, ok := android.OtherModuleProvider(ctx, dep, android.CodegenInfoProvider); ok {
 
 			// aconfig declaration names and cache files are collected for all aconfig library dependencies
-			adg.aconfigDeclarationNames = append(adg.aconfigDeclarationNames, provider.AconfigDeclarations...)
-			adg.intermediateCacheOutputPaths = append(adg.intermediateCacheOutputPaths, provider.IntermediateCacheOutputPaths...)
+			aconfigDeclarationNames = append(aconfigDeclarationNames, provider.AconfigDeclarations...)
+			intermediateCacheOutputPaths = append(intermediateCacheOutputPaths, provider.IntermediateCacheOutputPaths...)
 
 			switch tag {
 			case aconfigDeclarationsGroupTag:
 				// Will retrieve outputs from another language codegen modules when support is added
-				adg.javaSrcjars = append(adg.javaSrcjars, provider.Srcjars...)
-				maps.Copy(adg.modeInfos, provider.ModeInfos)
+				javaSrcjars = append(javaSrcjars, provider.Srcjars...)
+				maps.Copy(modeInfos, provider.ModeInfos)
 			case javaAconfigLibraryTag:
-				adg.javaSrcjars = append(adg.javaSrcjars, provider.Srcjars...)
-				maps.Copy(adg.modeInfos, provider.ModeInfos)
+				javaSrcjars = append(javaSrcjars, provider.Srcjars...)
+				maps.Copy(modeInfos, provider.ModeInfos)
 			case ccAconfigLibraryTag:
-				maps.Copy(adg.modeInfos, provider.ModeInfos)
+				maps.Copy(modeInfos, provider.ModeInfos)
 			case rustAconfigLibraryTag:
-				maps.Copy(adg.modeInfos, provider.ModeInfos)
+				maps.Copy(modeInfos, provider.ModeInfos)
 			}
 		}
 	})
-}
 
-func (adg *AconfigDeclarationsGroup) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	adg.VisitDeps(ctx)
-	adg.aconfigDeclarationNames = android.FirstUniqueStrings(adg.aconfigDeclarationNames)
-	adg.intermediateCacheOutputPaths = android.FirstUniquePaths(adg.intermediateCacheOutputPaths)
+	aconfigDeclarationNames = android.FirstUniqueStrings(aconfigDeclarationNames)
+	intermediateCacheOutputPaths = android.FirstUniquePaths(intermediateCacheOutputPaths)
 
 	android.SetProvider(ctx, android.CodegenInfoProvider, android.CodegenInfo{
-		AconfigDeclarations:          adg.aconfigDeclarationNames,
-		IntermediateCacheOutputPaths: adg.intermediateCacheOutputPaths,
-		Srcjars:                      adg.javaSrcjars,
-		ModeInfos:                    adg.modeInfos,
+		AconfigDeclarations:          aconfigDeclarationNames,
+		IntermediateCacheOutputPaths: intermediateCacheOutputPaths,
+		Srcjars:                      javaSrcjars,
+		ModeInfos:                    modeInfos,
 	})
 
-	ctx.SetOutputFiles(adg.intermediateCacheOutputPaths, "")
-	ctx.SetOutputFiles(adg.javaSrcjars, ".srcjars")
-}
-
-func (adg *AconfigDeclarationsGroup) Srcjars() android.Paths {
-	return adg.javaSrcjars
-}
-
-func (adg *AconfigDeclarationsGroup) AconfigDeclarations() []string {
-	return adg.aconfigDeclarationNames
+	ctx.SetOutputFiles(intermediateCacheOutputPaths, "")
+	ctx.SetOutputFiles(javaSrcjars, ".srcjars")
 }
diff --git a/aconfig/codegen/java_aconfig_library.go b/aconfig/codegen/java_aconfig_library.go
index 9f42e21..673ac2a 100644
--- a/aconfig/codegen/java_aconfig_library.go
+++ b/aconfig/codegen/java_aconfig_library.go
@@ -15,8 +15,6 @@
 package codegen
 
 import (
-	"fmt"
-
 	"android/soong/android"
 	"android/soong/java"
 
@@ -80,7 +78,7 @@
 	// Get the values that came from the global RELEASE_ACONFIG_VALUE_SETS flag
 	declarationsModules := ctx.GetDirectDepsWithTag(declarationsTag)
 	if len(declarationsModules) != 1 {
-		panic(fmt.Errorf("Exactly one aconfig_declarations property required"))
+		panic("Exactly one aconfig_declarations property required")
 	}
 	declarations, _ := android.OtherModuleProvider(ctx, declarationsModules[0], android.AconfigDeclarationsProviderKey)
 
@@ -133,10 +131,6 @@
 	return srcJarPath, declarations.IntermediateCacheOutputPath
 }
 
-func (callbacks *JavaAconfigDeclarationsLibraryCallbacks) AconfigDeclarations() *string {
-	return proptools.StringPtr(callbacks.properties.Aconfig_declarations)
-}
-
 func isModeSupported(mode string) bool {
 	return android.InList(mode, aconfigSupportedModes)
 }
diff --git a/android/config.go b/android/config.go
index 58176e5..1124488 100644
--- a/android/config.go
+++ b/android/config.go
@@ -22,7 +22,6 @@
 	"fmt"
 	"os"
 	"path/filepath"
-	"reflect"
 	"runtime"
 	"strconv"
 	"strings"
@@ -37,9 +36,7 @@
 	"github.com/google/blueprint/proptools"
 
 	"android/soong/android/soongconfig"
-	"android/soong/bazel"
 	"android/soong/remoteexec"
-	"android/soong/starlark_fmt"
 )
 
 // Bool re-exports proptools.Bool for the android package.
@@ -413,7 +410,7 @@
 			proptools.StringPtr(String(configurable.Platform_sdk_codename))
 	}
 
-	return saveToBazelConfigFile(configurable, filepath.Dir(filename))
+	return nil
 }
 
 // atomically writes the config file in case two copies of soong_build are running simultaneously
@@ -447,81 +444,6 @@
 	return nil
 }
 
-type productVariableStarlarkRepresentation struct {
-	soongType   string
-	selectable  bool
-	archVariant bool
-}
-
-func saveToBazelConfigFile(config *ProductVariables, outDir string) error {
-	dir := filepath.Join(outDir, bazel.SoongInjectionDirName, "product_config")
-	err := createDirIfNonexistent(dir, os.ModePerm)
-	if err != nil {
-		return fmt.Errorf("Could not create dir %s: %s", dir, err)
-	}
-
-	allProductVariablesType := reflect.TypeOf((*ProductVariables)(nil)).Elem()
-	productVariablesInfo := make(map[string]productVariableStarlarkRepresentation)
-	p := variableProperties{}
-	t := reflect.TypeOf(p.Product_variables)
-	for i := 0; i < t.NumField(); i++ {
-		f := t.Field(i)
-		archVariant := proptools.HasTag(f, "android", "arch_variant")
-		if mainProductVariablesStructField, ok := allProductVariablesType.FieldByName(f.Name); ok {
-			productVariablesInfo[f.Name] = productVariableStarlarkRepresentation{
-				soongType:   stringRepresentationOfSimpleType(mainProductVariablesStructField.Type),
-				selectable:  true,
-				archVariant: archVariant,
-			}
-		} else {
-			panic("Unknown variable " + f.Name)
-		}
-	}
-
-	err = pathtools.WriteFileIfChanged(filepath.Join(dir, "product_variable_constants.bzl"), []byte(fmt.Sprintf(`
-# product_var_constant_info is a map of product variables to information about them. The fields are:
-# - soongType: The type of the product variable as it appears in soong's ProductVariables struct.
-#              examples are string, bool, int, *bool, *string, []string, etc. This may be an overly
-#              conservative estimation of the type, for example a *bool could oftentimes just be a
-#              bool that defaults to false.
-# - selectable: if this product variable can be selected on in Android.bp/build files. This means
-#               it's listed in the "variableProperties" soong struct. Currently all variables in
-#               this list are selectable because we only need the selectable ones at the moment,
-#               but the list may be expanded later.
-# - archVariant: If the variable is tagged as arch variant in the "variableProperties" struct.
-product_var_constant_info = %s
-product_var_constraints = [k for k, v in product_var_constant_info.items() if v.selectable]
-arch_variant_product_var_constraints = [k for k, v in product_var_constant_info.items() if v.selectable and v.archVariant]
-`, starlark_fmt.PrintAny(productVariablesInfo, 0))), 0644)
-	if err != nil {
-		return fmt.Errorf("Could not write .bzl config file %s", err)
-	}
-	err = pathtools.WriteFileIfChanged(filepath.Join(dir, "BUILD"),
-		[]byte(bazel.GeneratedBazelFileWarning), 0644)
-	if err != nil {
-		return fmt.Errorf("Could not write BUILD config file %s", err)
-	}
-
-	return nil
-}
-
-func stringRepresentationOfSimpleType(ty reflect.Type) string {
-	switch ty.Kind() {
-	case reflect.String:
-		return "string"
-	case reflect.Bool:
-		return "bool"
-	case reflect.Int:
-		return "int"
-	case reflect.Slice:
-		return "[]" + stringRepresentationOfSimpleType(ty.Elem())
-	case reflect.Pointer:
-		return "*" + stringRepresentationOfSimpleType(ty.Elem())
-	default:
-		panic("unimplemented type: " + ty.Kind().String())
-	}
-}
-
 // NullConfig returns a mostly empty Config for use by standalone tools like dexpreopt_gen that
 // use the android package.
 func NullConfig(outDir, soongOutDir string) Config {
diff --git a/android/selects_test.go b/android/selects_test.go
index 6f980ce..3093deb 100644
--- a/android/selects_test.go
+++ b/android/selects_test.go
@@ -778,6 +778,27 @@
 				my_string_list: &[]string{"a.cpp", "b.cpp", "c.cpp"},
 			},
 		},
+		{
+			name: "Test AppendSimpleValue",
+			bp: `
+			my_module_type {
+				name: "foo",
+				my_string_list: ["a.cpp"] + select(soong_config_variable("my_namespace", "my_variable"), {
+					"a": ["a.cpp"],
+					"b": ["b.cpp"],
+					default: ["c.cpp"],
+				}),
+			}
+			`,
+			vendorVars: map[string]map[string]string{
+				"selects_test": {
+					"append_to_string_list": "foo.cpp",
+				},
+			},
+			provider: selectsTestProvider{
+				my_string_list: &[]string{"a.cpp", "c.cpp", "foo.cpp"},
+			},
+		},
 	}
 
 	for _, tc := range testCases {
@@ -892,6 +913,10 @@
 }
 
 func (p *selectsMockModule) GenerateAndroidBuildActions(ctx ModuleContext) {
+	toAppend := ctx.Config().VendorConfig("selects_test").String("append_to_string_list")
+	if toAppend != "" {
+		p.properties.My_string_list.AppendSimpleValue([]string{toAppend})
+	}
 	SetProvider(ctx, selectsTestProviderKey, selectsTestProvider{
 		my_bool:                        optionalToPtr(p.properties.My_bool.Get(ctx)),
 		my_string:                      optionalToPtr(p.properties.My_string.Get(ctx)),
diff --git a/android/testing.go b/android/testing.go
index 6518f4a..6fb2997 100644
--- a/android/testing.go
+++ b/android/testing.go
@@ -1014,10 +1014,18 @@
 	return normalizeStringMapRelativeToTop(m.config, m.module.VariablesForTests())
 }
 
-// OutputFiles calls OutputFileProducer.OutputFiles on the encapsulated module, exits the test
-// immediately if there is an error and otherwise returns the result of calling Paths.RelativeToTop
+// OutputFiles first checks if module base outputFiles property has any output
+// files can be used to return.
+// If not, it calls OutputFileProducer.OutputFiles on the
+// encapsulated module, exits the test immediately if there is an error and
+// otherwise returns the result of calling Paths.RelativeToTop
 // on the returned Paths.
 func (m TestingModule) OutputFiles(t *testing.T, tag string) Paths {
+	// TODO: add non-empty-string tag case and remove OutputFileProducer part
+	if tag == "" && m.module.base().outputFiles.DefaultOutputFiles != nil {
+		return m.module.base().outputFiles.DefaultOutputFiles.RelativeToTop()
+	}
+
 	producer, ok := m.module.(OutputFileProducer)
 	if !ok {
 		t.Fatalf("%q must implement OutputFileProducer\n", m.module.Name())
diff --git a/cc/compiler.go b/cc/compiler.go
index 33f762b..d8446fb 100644
--- a/cc/compiler.go
+++ b/cc/compiler.go
@@ -98,7 +98,7 @@
 
 	// list of generated headers to add to the include path. These are the names
 	// of genrule modules.
-	Generated_headers []string `android:"arch_variant,variant_prepend"`
+	Generated_headers proptools.Configurable[[]string] `android:"arch_variant,variant_prepend"`
 
 	// pass -frtti instead of -fno-rtti
 	Rtti *bool `android:"arch_variant"`
@@ -172,12 +172,6 @@
 		Target_api *string
 	}
 
-	Debug, Release struct {
-		// list of module-specific flags that will be used for C and C++ compiles in debug or
-		// release builds
-		Cflags []string `android:"arch_variant"`
-	} `android:"arch_variant"`
-
 	Target struct {
 		Vendor, Product struct {
 			// list of source files that should only be used in vendor or
@@ -302,7 +296,7 @@
 func (compiler *baseCompiler) compilerDeps(ctx DepsContext, deps Deps) Deps {
 	deps.GeneratedSources = append(deps.GeneratedSources, compiler.Properties.Generated_sources...)
 	deps.GeneratedSources = removeListFromList(deps.GeneratedSources, compiler.Properties.Exclude_generated_sources)
-	deps.GeneratedHeaders = append(deps.GeneratedHeaders, compiler.Properties.Generated_headers...)
+	deps.GeneratedHeaders = append(deps.GeneratedHeaders, compiler.Properties.Generated_headers.GetOrDefault(ctx, nil)...)
 	deps.AidlLibs = append(deps.AidlLibs, compiler.Properties.Aidl.Libs...)
 
 	android.ProtoDeps(ctx, &compiler.Proto)
@@ -479,11 +473,6 @@
 		ctx.ModuleErrorf("%s", err)
 	}
 
-	CheckBadCompilerFlags(ctx, "release.cflags", compiler.Properties.Release.Cflags)
-
-	// TODO: debug
-	flags.Local.CFlags = append(flags.Local.CFlags, esc(compiler.Properties.Release.Cflags)...)
-
 	if !ctx.DeviceConfig().BuildBrokenClangCFlags() && len(compiler.Properties.Clang_cflags) != 0 {
 		ctx.PropertyErrorf("clang_cflags", "property is deprecated, see Changes.md file")
 	} else {
diff --git a/cc/lto.go b/cc/lto.go
index 60eb4d6..4444152 100644
--- a/cc/lto.go
+++ b/cc/lto.go
@@ -54,6 +54,9 @@
 
 	// Use -fwhole-program-vtables cflag.
 	Whole_program_vtables *bool
+
+	// Use --lto-O0 flag.
+	Lto_O0 *bool
 }
 
 type lto struct {
@@ -106,12 +109,8 @@
 		ltoCFlags := []string{"-flto=thin", "-fsplit-lto-unit"}
 		var ltoLdFlags []string
 
-		// The module did not explicitly turn on LTO. Only leverage LTO's
-		// better dead code elimination and CFG simplification, but do
-		// not perform costly optimizations for a balance between compile
-		// time, binary size and performance.
-		// Apply the same for Eng builds as well.
-		if !lto.ThinLTO() || ctx.Config().Eng() {
+		// Do not perform costly LTO optimizations for Eng builds.
+		if Bool(lto.Properties.Lto_O0) || ctx.Config().Eng() {
 			ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")
 		}
 
diff --git a/cmd/release_config/release_config_lib/Android.bp b/cmd/release_config/release_config_lib/Android.bp
index 0c67e11..17251bd 100644
--- a/cmd/release_config/release_config_lib/Android.bp
+++ b/cmd/release_config/release_config_lib/Android.bp
@@ -24,6 +24,7 @@
         "golang-protobuf-reflect-protoreflect",
         "golang-protobuf-runtime-protoimpl",
         "soong-cmd-release_config-proto",
+        "blueprint-pathtools",
     ],
     srcs: [
         "flag_artifact.go",
diff --git a/cmd/release_config/release_config_lib/flag_artifact.go b/cmd/release_config/release_config_lib/flag_artifact.go
index 6cdde7c..cfac7d7 100644
--- a/cmd/release_config/release_config_lib/flag_artifact.go
+++ b/cmd/release_config/release_config_lib/flag_artifact.go
@@ -67,7 +67,7 @@
 	if artifactsPath != "" {
 		fas := &rc_proto.FlagArtifacts{}
 		LoadMessage(artifactsPath, fas)
-		for _, fa_pb := range fas.FlagArtifacts {
+		for _, fa_pb := range fas.Flags {
 			fa := &FlagArtifact{}
 			fa.FlagDeclaration = fa_pb.GetFlagDeclaration()
 			if val := fa_pb.GetValue(); val != nil {
diff --git a/cmd/release_config/release_config_lib/release_config.go b/cmd/release_config/release_config_lib/release_config.go
index f0ce1bb..6911e54 100644
--- a/cmd/release_config/release_config_lib/release_config.go
+++ b/cmd/release_config/release_config_lib/release_config.go
@@ -282,13 +282,13 @@
 			if _, ok := config.PartitionBuildFlags[container]; !ok {
 				config.PartitionBuildFlags[container] = &rc_proto.FlagArtifacts{}
 			}
-			config.PartitionBuildFlags[container].FlagArtifacts = append(config.PartitionBuildFlags[container].FlagArtifacts, artifact)
+			config.PartitionBuildFlags[container].Flags = append(config.PartitionBuildFlags[container].Flags, artifact)
 		}
 	}
 	config.ReleaseConfigArtifact = &rc_proto.ReleaseConfigArtifact{
 		Name:       proto.String(config.Name),
 		OtherNames: config.OtherNames,
-		FlagArtifacts: func() []*rc_proto.FlagArtifact {
+		Flags: func() []*rc_proto.FlagArtifact {
 			ret := []*rc_proto.FlagArtifact{}
 			flagNames := []string{}
 			for k := range config.FlagArtifacts {
@@ -386,7 +386,7 @@
 func (config *ReleaseConfig) WritePartitionBuildFlags(outDir string) error {
 	var err error
 	for partition, flags := range config.PartitionBuildFlags {
-		slices.SortFunc(flags.FlagArtifacts, func(a, b *rc_proto.FlagArtifact) int {
+		slices.SortFunc(flags.Flags, func(a, b *rc_proto.FlagArtifact) int {
 			return cmp.Compare(*a.FlagDeclaration.Name, *b.FlagDeclaration.Name)
 		})
 		// The json file name must not be modified as this is read from
diff --git a/cmd/release_config/release_config_lib/util.go b/cmd/release_config/release_config_lib/util.go
index 0a19efe..9919c70 100644
--- a/cmd/release_config/release_config_lib/util.go
+++ b/cmd/release_config/release_config_lib/util.go
@@ -25,6 +25,7 @@
 	"slices"
 	"strings"
 
+	"github.com/google/blueprint/pathtools"
 	"google.golang.org/protobuf/encoding/prototext"
 	"google.golang.org/protobuf/proto"
 )
@@ -101,7 +102,7 @@
 	if err != nil {
 		return err
 	}
-	return os.WriteFile(path, data, 0644)
+	return pathtools.WriteFileIfChanged(path, data, 0644)
 }
 
 // Read a message from a file.
diff --git a/cmd/release_config/release_config_proto/build_flags_common.pb.go b/cmd/release_config/release_config_proto/build_flags_common.pb.go
index 1e927db..82fbcfa 100644
--- a/cmd/release_config/release_config_proto/build_flags_common.pb.go
+++ b/cmd/release_config/release_config_proto/build_flags_common.pb.go
@@ -15,7 +15,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.30.0
+// 	protoc-gen-go v1.33.0
 // 	protoc        v3.21.12
 // source: build_flags_common.proto
 
diff --git a/cmd/release_config/release_config_proto/build_flags_declarations.pb.go b/cmd/release_config/release_config_proto/build_flags_declarations.pb.go
index c0573ed..73a7e87 100644
--- a/cmd/release_config/release_config_proto/build_flags_declarations.pb.go
+++ b/cmd/release_config/release_config_proto/build_flags_declarations.pb.go
@@ -15,7 +15,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.30.0
+// 	protoc-gen-go v1.33.0
 // 	protoc        v3.21.12
 // source: build_flags_declarations.proto
 
diff --git a/cmd/release_config/release_config_proto/build_flags_out.pb.go b/cmd/release_config/release_config_proto/build_flags_out.pb.go
index 309ec34..b246eb6 100644
--- a/cmd/release_config/release_config_proto/build_flags_out.pb.go
+++ b/cmd/release_config/release_config_proto/build_flags_out.pb.go
@@ -15,7 +15,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.30.0
+// 	protoc-gen-go v1.33.0
 // 	protoc        v3.21.12
 // source: build_flags_out.proto
 
@@ -163,7 +163,7 @@
 	unknownFields protoimpl.UnknownFields
 
 	// The artifacts
-	FlagArtifacts []*FlagArtifact `protobuf:"bytes,1,rep,name=flag_artifacts,json=flagArtifacts" json:"flag_artifacts,omitempty"`
+	Flags []*FlagArtifact `protobuf:"bytes,1,rep,name=flags" json:"flags,omitempty"`
 }
 
 func (x *FlagArtifacts) Reset() {
@@ -198,9 +198,9 @@
 	return file_build_flags_out_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *FlagArtifacts) GetFlagArtifacts() []*FlagArtifact {
+func (x *FlagArtifacts) GetFlags() []*FlagArtifact {
 	if x != nil {
-		return x.FlagArtifacts
+		return x.Flags
 	}
 	return nil
 }
@@ -217,7 +217,7 @@
 	OtherNames []string `protobuf:"bytes,2,rep,name=other_names,json=otherNames" json:"other_names,omitempty"`
 	// The complete set of build flags in this release config, after all
 	// inheritance and other processing is complete.
-	FlagArtifacts []*FlagArtifact `protobuf:"bytes,3,rep,name=flag_artifacts,json=flagArtifacts" json:"flag_artifacts,omitempty"`
+	Flags []*FlagArtifact `protobuf:"bytes,3,rep,name=flags" json:"flags,omitempty"`
 	// The (complete) list of aconfig_value_sets Soong modules to use.
 	AconfigValueSets []string `protobuf:"bytes,4,rep,name=aconfig_value_sets,json=aconfigValueSets" json:"aconfig_value_sets,omitempty"`
 	// The names of the release_config_artifacts from which we inherited.
@@ -277,9 +277,9 @@
 	return nil
 }
 
-func (x *ReleaseConfigArtifact) GetFlagArtifacts() []*FlagArtifact {
+func (x *ReleaseConfigArtifact) GetFlags() []*FlagArtifact {
 	if x != nil {
-		return x.FlagArtifacts
+		return x.Flags
 	}
 	return nil
 }
@@ -406,67 +406,67 @@
 	0x73, 0x18, 0x08, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x28, 0x2e, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69,
 	0x64, 0x2e, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
 	0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x74, 0x72, 0x61, 0x63, 0x65, 0x70, 0x6f, 0x69, 0x6e,
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+	0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x6d, 0x61,
+	0x70, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x42, 0x33, 0x5a, 0x31,
+	0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x2f, 0x72, 0x65,
+	0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2f, 0x72, 0x65, 0x6c,
+	0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x70, 0x72, 0x6f, 0x74,
+	0x6f,
 }
 
 var (
@@ -498,8 +498,8 @@
 	7,  // 1: android.release_config_proto.flag_artifact.flag_declaration:type_name -> android.release_config_proto.flag_declaration
 	6,  // 2: android.release_config_proto.flag_artifact.value:type_name -> android.release_config_proto.value
 	0,  // 3: android.release_config_proto.flag_artifact.traces:type_name -> android.release_config_proto.tracepoint
-	1,  // 4: android.release_config_proto.flag_artifacts.flag_artifacts:type_name -> android.release_config_proto.flag_artifact
-	1,  // 5: android.release_config_proto.release_config_artifact.flag_artifacts:type_name -> android.release_config_proto.flag_artifact
+	1,  // 4: android.release_config_proto.flag_artifacts.flags:type_name -> android.release_config_proto.flag_artifact
+	1,  // 5: android.release_config_proto.release_config_artifact.flags:type_name -> android.release_config_proto.flag_artifact
 	3,  // 6: android.release_config_proto.release_configs_artifact.release_config:type_name -> android.release_config_proto.release_config_artifact
 	3,  // 7: android.release_config_proto.release_configs_artifact.other_release_configs:type_name -> android.release_config_proto.release_config_artifact
 	5,  // 8: android.release_config_proto.release_configs_artifact.release_config_maps_map:type_name -> android.release_config_proto.release_configs_artifact.ReleaseConfigMapsMapEntry
diff --git a/cmd/release_config/release_config_proto/build_flags_out.proto b/cmd/release_config/release_config_proto/build_flags_out.proto
index 0cbc157..2f1715b 100644
--- a/cmd/release_config/release_config_proto/build_flags_out.proto
+++ b/cmd/release_config/release_config_proto/build_flags_out.proto
@@ -58,7 +58,8 @@
 
 message flag_artifacts {
   // The artifacts
-  repeated flag_artifact flag_artifacts = 1;
+  repeated flag_artifact flags = 1;
+  reserved "flag_artifacts";
 }
 
 message release_config_artifact {
@@ -71,7 +72,8 @@
 
   // The complete set of build flags in this release config, after all
   // inheritance and other processing is complete.
-  repeated flag_artifact flag_artifacts = 3;
+  repeated flag_artifact flags = 3;
+  reserved "flag_artifacts";
 
   // The (complete) list of aconfig_value_sets Soong modules to use.
   repeated string aconfig_value_sets = 4;
diff --git a/cmd/release_config/release_config_proto/build_flags_src.pb.go b/cmd/release_config/release_config_proto/build_flags_src.pb.go
index 8de340e..bc5f5c0 100644
--- a/cmd/release_config/release_config_proto/build_flags_src.pb.go
+++ b/cmd/release_config/release_config_proto/build_flags_src.pb.go
@@ -15,7 +15,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.30.0
+// 	protoc-gen-go v1.33.0
 // 	protoc        v3.21.12
 // source: build_flags_src.proto
 
diff --git a/java/aar.go b/java/aar.go
index 07392f6..3168d9b 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -831,12 +831,13 @@
 	if a.usesLibrary.shouldDisableDexpreopt {
 		a.dexpreopter.disableDexpreopt()
 	}
+	aconfigTextFilePaths := getAconfigFilePaths(ctx)
 	a.aapt.buildActions(ctx,
 		aaptBuildActionOptions{
 			sdkContext:                     android.SdkContext(a),
 			classLoaderContexts:            a.classLoaderContexts,
 			enforceDefaultTargetSdkVersion: false,
-			aconfigTextFiles:               getAconfigFilePaths(ctx),
+			aconfigTextFiles:               aconfigTextFilePaths,
 			usesLibrary:                    &a.usesLibrary,
 		},
 	)
@@ -906,6 +907,10 @@
 			JniPackages: prebuiltJniPackages,
 		})
 	}
+
+	android.SetProvider(ctx, FlagsPackagesProvider, FlagsPackages{
+		AconfigTextFiles: aconfigTextFilePaths,
+	})
 }
 
 func (a *AndroidLibrary) IDEInfo(dpInfo *android.IdeInfo) {
diff --git a/java/app.go b/java/app.go
index a24099c..739ef1a 100644
--- a/java/app.go
+++ b/java/app.go
@@ -47,6 +47,13 @@
 		}, "packageName")
 )
 
+type FlagsPackages struct {
+	// Paths to the aconfig dump output text files that are consumed by aapt2
+	AconfigTextFiles android.Paths
+}
+
+var FlagsPackagesProvider = blueprint.NewProvider[FlagsPackages]()
+
 func RegisterAppBuildComponents(ctx android.RegistrationContext) {
 	ctx.RegisterModuleType("android_app", AndroidAppFactory)
 	ctx.RegisterModuleType("android_test", AndroidTestFactory)
@@ -478,18 +485,27 @@
 }
 
 func getAconfigFilePaths(ctx android.ModuleContext) (aconfigTextFilePaths android.Paths) {
-	ctx.VisitDirectDepsWithTag(aconfigDeclarationTag, func(dep android.Module) {
-		if provider, ok := android.OtherModuleProvider(ctx, dep, android.AconfigDeclarationsProviderKey); ok {
-			aconfigTextFilePaths = append(aconfigTextFilePaths, provider.IntermediateDumpOutputPath)
-		} else {
-			ctx.ModuleErrorf("Only aconfig_declarations module type is allowed for "+
-				"flags_packages property, but %s is not aconfig_declarations module type",
-				dep.Name(),
-			)
+	ctx.VisitDirectDeps(func(dep android.Module) {
+		tag := ctx.OtherModuleDependencyTag(dep)
+		switch tag {
+		case staticLibTag:
+			if flagPackages, ok := android.OtherModuleProvider(ctx, dep, FlagsPackagesProvider); ok {
+				aconfigTextFilePaths = append(aconfigTextFilePaths, flagPackages.AconfigTextFiles...)
+			}
+
+		case aconfigDeclarationTag:
+			if provider, ok := android.OtherModuleProvider(ctx, dep, android.AconfigDeclarationsProviderKey); ok {
+				aconfigTextFilePaths = append(aconfigTextFilePaths, provider.IntermediateDumpOutputPath)
+			} else {
+				ctx.ModuleErrorf("Only aconfig_declarations module type is allowed for "+
+					"flags_packages property, but %s is not aconfig_declarations module type",
+					dep.Name(),
+				)
+			}
 		}
 	})
 
-	return aconfigTextFilePaths
+	return android.FirstUniquePaths(aconfigTextFilePaths)
 }
 
 func (a *AndroidApp) aaptBuildActions(ctx android.ModuleContext) {
@@ -544,6 +560,9 @@
 
 	// Use non final ids if we are doing optimized shrinking and are using R8.
 	nonFinalIds := a.dexProperties.optimizedResourceShrinkingEnabled(ctx) && a.dexer.effectiveOptimizeEnabled()
+
+	aconfigTextFilePaths := getAconfigFilePaths(ctx)
+
 	a.aapt.buildActions(ctx,
 		aaptBuildActionOptions{
 			sdkContext:                     android.SdkContext(a),
@@ -552,13 +571,17 @@
 			enforceDefaultTargetSdkVersion: a.enforceDefaultTargetSdkVersion(),
 			forceNonFinalResourceIDs:       nonFinalIds,
 			extraLinkFlags:                 aaptLinkFlags,
-			aconfigTextFiles:               getAconfigFilePaths(ctx),
+			aconfigTextFiles:               aconfigTextFilePaths,
 			usesLibrary:                    &a.usesLibrary,
 		},
 	)
 
 	// apps manifests are handled by aapt, don't let Module see them
 	a.properties.Manifest = nil
+
+	android.SetProvider(ctx, FlagsPackagesProvider, FlagsPackages{
+		AconfigTextFiles: aconfigTextFilePaths,
+	})
 }
 
 func (a *AndroidApp) proguardBuildActions(ctx android.ModuleContext) {
diff --git a/java/app_test.go b/java/app_test.go
index 8049494..1a862fa 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -4369,6 +4369,82 @@
 	)
 }
 
+func TestAppFlagsPackagesPropagation(t *testing.T) {
+	ctx := testApp(t, `
+		aconfig_declarations {
+			name: "foo",
+			package: "com.example.package.foo",
+			container: "com.android.foo",
+			srcs: [
+				"foo.aconfig",
+			],
+		}
+		aconfig_declarations {
+			name: "bar",
+			package: "com.example.package.bar",
+			container: "com.android.bar",
+			srcs: [
+				"bar.aconfig",
+			],
+		}
+		aconfig_declarations {
+			name: "baz",
+			package: "com.example.package.baz",
+			container: "com.android.baz",
+			srcs: [
+				"baz.aconfig",
+			],
+		}
+		android_library {
+			name: "foo_lib",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			flags_packages: [
+				"foo",
+			],
+		}
+		android_library {
+			name: "bar_lib",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			flags_packages: [
+				"bar",
+			],
+		}
+		android_app {
+			name: "baz_app",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			flags_packages: [
+				"baz",
+			],
+			static_libs: [
+				"bar_lib",
+			],
+			libs: [
+				"foo_lib",
+			],
+		}
+	`)
+
+	bazApp := ctx.ModuleForTests("baz_app", "android_common")
+
+	// android_app module depends on aconfig_declarations listed in flags_packages
+	// and that of static libs, but not libs
+	aapt2LinkRule := bazApp.Rule("android/soong/java.aapt2Link")
+	linkInFlags := aapt2LinkRule.Args["inFlags"]
+	android.AssertStringDoesContain(t,
+		"aapt2 link command expected to pass feature flags arguments of flags_packages and that of its static libs",
+		linkInFlags,
+		"--feature-flags @out/soong/.intermediates/bar/intermediate.txt --feature-flags @out/soong/.intermediates/baz/intermediate.txt",
+	)
+	android.AssertStringDoesNotContain(t,
+		"aapt2 link command expected to not pass feature flags arguments of flags_packages of its libs",
+		linkInFlags,
+		"--feature-flags @out/soong/.intermediates/foo/intermediate.txt",
+	)
+}
+
 // Test that dexpreopt is disabled if an optional_uses_libs exists, but does not provide an implementation.
 func TestNoDexpreoptOptionalUsesLibDoesNotHaveImpl(t *testing.T) {
 	bp := `
diff --git a/java/platform_compat_config.go b/java/platform_compat_config.go
index 99fa092..49756dd 100644
--- a/java/platform_compat_config.go
+++ b/java/platform_compat_config.go
@@ -266,7 +266,7 @@
 
 func (p *platformCompatConfigSingleton) MakeVars(ctx android.MakeVarsContext) {
 	if p.metadata != nil {
-		ctx.Strict("INTERNAL_PLATFORM_MERGED_COMPAT_CONFIG", p.metadata.String())
+		ctx.DistForGoal("droidcore", p.metadata)
 	}
 }
 
diff --git a/java/rro.go b/java/rro.go
index 72170fc..0fc6e1c 100644
--- a/java/rro.go
+++ b/java/rro.go
@@ -150,12 +150,13 @@
 		aaptLinkFlags = append(aaptLinkFlags,
 			"--rename-overlay-category "+*r.overridableProperties.Category)
 	}
+	aconfigTextFilePaths := getAconfigFilePaths(ctx)
 	r.aapt.buildActions(ctx,
 		aaptBuildActionOptions{
 			sdkContext:                     r,
 			enforceDefaultTargetSdkVersion: false,
 			extraLinkFlags:                 aaptLinkFlags,
-			aconfigTextFiles:               getAconfigFilePaths(ctx),
+			aconfigTextFiles:               aconfigTextFilePaths,
 		},
 	)
 
@@ -176,6 +177,10 @@
 	partition := rroPartition(ctx)
 	r.installDir = android.PathForModuleInPartitionInstall(ctx, partition, "overlay", String(r.properties.Theme))
 	ctx.InstallFile(r.installDir, r.outputFile.Base(), r.outputFile)
+
+	android.SetProvider(ctx, FlagsPackagesProvider, FlagsPackages{
+		AconfigTextFiles: aconfigTextFilePaths,
+	})
 }
 
 func (r *RuntimeResourceOverlay) SdkVersion(ctx android.EarlyModuleContext) android.SdkSpec {