diff --git a/cc/cc.go b/cc/cc.go
index e1d184a..93df9c2 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -2202,6 +2202,8 @@
 		&BaseLinkerProperties{},
 		&ObjectLinkerProperties{},
 		&LibraryProperties{},
+		&StaticProperties{},
+		&SharedProperties{},
 		&FlagExporterProperties{},
 		&BinaryLinkerProperties{},
 		&TestProperties{},
diff --git a/cc/cc_test.go b/cc/cc_test.go
index 6275822..689aacd 100644
--- a/cc/cc_test.go
+++ b/cc/cc_test.go
@@ -15,8 +15,6 @@
 package cc
 
 import (
-	"android/soong/android"
-
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -25,6 +23,8 @@
 	"sort"
 	"strings"
 	"testing"
+
+	"android/soong/android"
 )
 
 var buildDir string
@@ -53,6 +53,7 @@
 }
 
 func testCcWithConfig(t *testing.T, bp string, config android.Config) *android.TestContext {
+	t.Helper()
 	return testCcWithConfigForOs(t, bp, config, android.Android)
 }
 
@@ -2321,3 +2322,67 @@
 		}
 	}
 }
+
+func TestDefaults(t *testing.T) {
+	ctx := testCc(t, `
+		cc_defaults {
+			name: "defaults",
+			srcs: ["foo.c"],
+			static: {
+				srcs: ["bar.c"],
+			},
+			shared: {
+				srcs: ["baz.c"],
+			},
+		}
+
+		cc_library_static {
+			name: "libstatic",
+			defaults: ["defaults"],
+		}
+
+		cc_library_shared {
+			name: "libshared",
+			defaults: ["defaults"],
+		}
+
+		cc_library {
+			name: "libboth",
+			defaults: ["defaults"],
+		}
+
+		cc_binary {
+			name: "binary",
+			defaults: ["defaults"],
+		}`)
+
+	pathsToBase := func(paths android.Paths) []string {
+		var ret []string
+		for _, p := range paths {
+			ret = append(ret, p.Base())
+		}
+		return ret
+	}
+
+	shared := ctx.ModuleForTests("libshared", "android_arm64_armv8-a_core_shared").Rule("ld")
+	if g, w := pathsToBase(shared.Inputs), []string{"foo.o", "baz.o"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("libshared ld rule wanted %q, got %q", w, g)
+	}
+	bothShared := ctx.ModuleForTests("libboth", "android_arm64_armv8-a_core_shared").Rule("ld")
+	if g, w := pathsToBase(bothShared.Inputs), []string{"foo.o", "baz.o"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("libboth ld rule wanted %q, got %q", w, g)
+	}
+	binary := ctx.ModuleForTests("binary", "android_arm64_armv8-a_core").Rule("ld")
+	if g, w := pathsToBase(binary.Inputs), []string{"foo.o"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("binary ld rule wanted %q, got %q", w, g)
+	}
+
+	static := ctx.ModuleForTests("libstatic", "android_arm64_armv8-a_core_static").Rule("ar")
+	if g, w := pathsToBase(static.Inputs), []string{"foo.o", "bar.o"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("libstatic ar rule wanted %q, got %q", w, g)
+	}
+	bothStatic := ctx.ModuleForTests("libboth", "android_arm64_armv8-a_core_static").Rule("ar")
+	if g, w := pathsToBase(bothStatic.Inputs), []string{"foo.o", "bar.o"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("libboth ar rule wanted %q, got %q", w, g)
+	}
+}
diff --git a/cc/library.go b/cc/library.go
index c402ea0..f9c89d0 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -31,24 +31,7 @@
 	"android/soong/genrule"
 )
 
-type StaticSharedLibraryProperties struct {
-	Srcs   []string `android:"path,arch_variant"`
-	Cflags []string `android:"arch_variant"`
-
-	Enabled            *bool    `android:"arch_variant"`
-	Whole_static_libs  []string `android:"arch_variant"`
-	Static_libs        []string `android:"arch_variant"`
-	Shared_libs        []string `android:"arch_variant"`
-	System_shared_libs []string `android:"arch_variant"`
-
-	Export_shared_lib_headers []string `android:"arch_variant"`
-	Export_static_lib_headers []string `android:"arch_variant"`
-}
-
 type LibraryProperties struct {
-	Static StaticSharedLibraryProperties `android:"arch_variant"`
-	Shared StaticSharedLibraryProperties `android:"arch_variant"`
-
 	// local file name to pass to the linker as -unexported_symbols_list
 	Unexported_symbols_list *string `android:"path,arch_variant"`
 	// local file name to pass to the linker as -force_symbols_not_weak_list
@@ -128,6 +111,28 @@
 	Inject_bssl_hash *bool `android:"arch_variant"`
 }
 
+type StaticProperties struct {
+	Static StaticOrSharedProperties `android:"arch_variant"`
+}
+
+type SharedProperties struct {
+	Shared StaticOrSharedProperties `android:"arch_variant"`
+}
+
+type StaticOrSharedProperties struct {
+	Srcs   []string `android:"path,arch_variant"`
+	Cflags []string `android:"arch_variant"`
+
+	Enabled            *bool    `android:"arch_variant"`
+	Whole_static_libs  []string `android:"arch_variant"`
+	Static_libs        []string `android:"arch_variant"`
+	Shared_libs        []string `android:"arch_variant"`
+	System_shared_libs []string `android:"arch_variant"`
+
+	Export_shared_lib_headers []string `android:"arch_variant"`
+	Export_static_lib_headers []string `android:"arch_variant"`
+}
+
 type LibraryMutatedProperties struct {
 	// Build a static variant
 	BuildStatic bool `blueprint:"mutated"`
@@ -295,6 +300,8 @@
 // functionality: static vs. shared linkage, reusing object files for shared libraries
 type libraryDecorator struct {
 	Properties        LibraryProperties
+	StaticProperties  StaticProperties
+	SharedProperties  SharedProperties
 	MutatedProperties LibraryMutatedProperties
 
 	// For reusing static library objects for shared library
@@ -355,11 +362,20 @@
 func (library *libraryDecorator) linkerProps() []interface{} {
 	var props []interface{}
 	props = append(props, library.baseLinker.linkerProps()...)
-	return append(props,
+	props = append(props,
 		&library.Properties,
 		&library.MutatedProperties,
 		&library.flagExporter.Properties,
 		&library.stripper.StripProperties)
+
+	if library.MutatedProperties.BuildShared {
+		props = append(props, &library.SharedProperties)
+	}
+	if library.MutatedProperties.BuildStatic {
+		props = append(props, &library.StaticProperties)
+	}
+
+	return props
 }
 
 func (library *libraryDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags {
@@ -373,9 +389,9 @@
 	}
 
 	if library.static() {
-		flags.CFlags = append(flags.CFlags, library.Properties.Static.Cflags...)
+		flags.CFlags = append(flags.CFlags, library.StaticProperties.Static.Cflags...)
 	} else if library.shared() {
-		flags.CFlags = append(flags.CFlags, library.Properties.Shared.Cflags...)
+		flags.CFlags = append(flags.CFlags, library.SharedProperties.Shared.Cflags...)
 	}
 
 	if library.shared() {
@@ -498,10 +514,10 @@
 		if len(library.baseCompiler.Properties.Srcs) > 0 {
 			ctx.PropertyErrorf("srcs", "cc_library_headers must not have any srcs")
 		}
-		if len(library.Properties.Static.Srcs) > 0 {
+		if len(library.StaticProperties.Static.Srcs) > 0 {
 			ctx.PropertyErrorf("static.srcs", "cc_library_headers must not have any srcs")
 		}
-		if len(library.Properties.Shared.Srcs) > 0 {
+		if len(library.SharedProperties.Shared.Srcs) > 0 {
 			ctx.PropertyErrorf("shared.srcs", "cc_library_headers must not have any srcs")
 		}
 		return Objects{}
@@ -516,8 +532,8 @@
 			SourceAbiFlags = append(SourceAbiFlags, "-I"+reexportedInclude)
 		}
 		flags.SAbiFlags = SourceAbiFlags
-		total_length := len(library.baseCompiler.Properties.Srcs) + len(deps.GeneratedSources) + len(library.Properties.Shared.Srcs) +
-			len(library.Properties.Static.Srcs)
+		total_length := len(library.baseCompiler.Properties.Srcs) + len(deps.GeneratedSources) +
+			len(library.SharedProperties.Shared.Srcs) + len(library.StaticProperties.Static.Srcs)
 		if total_length > 0 {
 			flags.SAbiDump = true
 		}
@@ -527,11 +543,11 @@
 	buildFlags := flagsToBuilderFlags(flags)
 
 	if library.static() {
-		srcs := android.PathsForModuleSrc(ctx, library.Properties.Static.Srcs)
+		srcs := android.PathsForModuleSrc(ctx, library.StaticProperties.Static.Srcs)
 		objs = objs.Append(compileObjs(ctx, buildFlags, android.DeviceStaticLibrary,
 			srcs, library.baseCompiler.pathDeps, library.baseCompiler.cFlagsDeps))
 	} else if library.shared() {
-		srcs := android.PathsForModuleSrc(ctx, library.Properties.Shared.Srcs)
+		srcs := android.PathsForModuleSrc(ctx, library.SharedProperties.Shared.Srcs)
 		objs = objs.Append(compileObjs(ctx, buildFlags, android.DeviceSharedLibrary,
 			srcs, library.baseCompiler.pathDeps, library.baseCompiler.cFlagsDeps))
 	}
@@ -625,12 +641,12 @@
 
 func (library *libraryDecorator) linkerDeps(ctx DepsContext, deps Deps) Deps {
 	if library.static() {
-		if library.Properties.Static.System_shared_libs != nil {
-			library.baseLinker.Properties.System_shared_libs = library.Properties.Static.System_shared_libs
+		if library.StaticProperties.Static.System_shared_libs != nil {
+			library.baseLinker.Properties.System_shared_libs = library.StaticProperties.Static.System_shared_libs
 		}
 	} else if library.shared() {
-		if library.Properties.Shared.System_shared_libs != nil {
-			library.baseLinker.Properties.System_shared_libs = library.Properties.Shared.System_shared_libs
+		if library.SharedProperties.Shared.System_shared_libs != nil {
+			library.baseLinker.Properties.System_shared_libs = library.SharedProperties.Shared.System_shared_libs
 		}
 	}
 
@@ -638,12 +654,12 @@
 
 	if library.static() {
 		deps.WholeStaticLibs = append(deps.WholeStaticLibs,
-			library.Properties.Static.Whole_static_libs...)
-		deps.StaticLibs = append(deps.StaticLibs, library.Properties.Static.Static_libs...)
-		deps.SharedLibs = append(deps.SharedLibs, library.Properties.Static.Shared_libs...)
+			library.StaticProperties.Static.Whole_static_libs...)
+		deps.StaticLibs = append(deps.StaticLibs, library.StaticProperties.Static.Static_libs...)
+		deps.SharedLibs = append(deps.SharedLibs, library.StaticProperties.Static.Shared_libs...)
 
-		deps.ReexportSharedLibHeaders = append(deps.ReexportSharedLibHeaders, library.Properties.Static.Export_shared_lib_headers...)
-		deps.ReexportStaticLibHeaders = append(deps.ReexportStaticLibHeaders, library.Properties.Static.Export_static_lib_headers...)
+		deps.ReexportSharedLibHeaders = append(deps.ReexportSharedLibHeaders, library.StaticProperties.Static.Export_shared_lib_headers...)
+		deps.ReexportStaticLibHeaders = append(deps.ReexportStaticLibHeaders, library.StaticProperties.Static.Export_static_lib_headers...)
 	} else if library.shared() {
 		if ctx.toolchain().Bionic() && !Bool(library.baseLinker.Properties.Nocrt) {
 			if !ctx.useSdk() {
@@ -662,12 +678,12 @@
 				deps.CrtEnd = "ndk_crtend_so." + version
 			}
 		}
-		deps.WholeStaticLibs = append(deps.WholeStaticLibs, library.Properties.Shared.Whole_static_libs...)
-		deps.StaticLibs = append(deps.StaticLibs, library.Properties.Shared.Static_libs...)
-		deps.SharedLibs = append(deps.SharedLibs, library.Properties.Shared.Shared_libs...)
+		deps.WholeStaticLibs = append(deps.WholeStaticLibs, library.SharedProperties.Shared.Whole_static_libs...)
+		deps.StaticLibs = append(deps.StaticLibs, library.SharedProperties.Shared.Static_libs...)
+		deps.SharedLibs = append(deps.SharedLibs, library.SharedProperties.Shared.Shared_libs...)
 
-		deps.ReexportSharedLibHeaders = append(deps.ReexportSharedLibHeaders, library.Properties.Shared.Export_shared_lib_headers...)
-		deps.ReexportStaticLibHeaders = append(deps.ReexportStaticLibHeaders, library.Properties.Shared.Export_static_lib_headers...)
+		deps.ReexportSharedLibHeaders = append(deps.ReexportSharedLibHeaders, library.SharedProperties.Shared.Export_shared_lib_headers...)
+		deps.ReexportStaticLibHeaders = append(deps.ReexportStaticLibHeaders, library.SharedProperties.Shared.Export_static_lib_headers...)
 	}
 	if ctx.useVndk() {
 		deps.WholeStaticLibs = removeListFromList(deps.WholeStaticLibs, library.baseLinker.Properties.Target.Vendor.Exclude_static_libs)
@@ -978,11 +994,13 @@
 }
 
 func (library *libraryDecorator) buildStatic() bool {
-	return library.MutatedProperties.BuildStatic && BoolDefault(library.Properties.Static.Enabled, true)
+	return library.MutatedProperties.BuildStatic &&
+		BoolDefault(library.StaticProperties.Static.Enabled, true)
 }
 
 func (library *libraryDecorator) buildShared() bool {
-	return library.MutatedProperties.BuildShared && BoolDefault(library.Properties.Shared.Enabled, true)
+	return library.MutatedProperties.BuildShared &&
+		BoolDefault(library.SharedProperties.Shared.Enabled, true)
 }
 
 func (library *libraryDecorator) getWholeStaticMissingDeps() []string {
@@ -1166,16 +1184,16 @@
 
 		// Check libraries in addition to cflags, since libraries may be exporting different
 		// include directories.
-		if len(staticCompiler.Properties.Static.Cflags) == 0 &&
-			len(sharedCompiler.Properties.Shared.Cflags) == 0 &&
-			len(staticCompiler.Properties.Static.Whole_static_libs) == 0 &&
-			len(sharedCompiler.Properties.Shared.Whole_static_libs) == 0 &&
-			len(staticCompiler.Properties.Static.Static_libs) == 0 &&
-			len(sharedCompiler.Properties.Shared.Static_libs) == 0 &&
-			len(staticCompiler.Properties.Static.Shared_libs) == 0 &&
-			len(sharedCompiler.Properties.Shared.Shared_libs) == 0 &&
-			staticCompiler.Properties.Static.System_shared_libs == nil &&
-			sharedCompiler.Properties.Shared.System_shared_libs == nil {
+		if len(staticCompiler.StaticProperties.Static.Cflags) == 0 &&
+			len(sharedCompiler.SharedProperties.Shared.Cflags) == 0 &&
+			len(staticCompiler.StaticProperties.Static.Whole_static_libs) == 0 &&
+			len(sharedCompiler.SharedProperties.Shared.Whole_static_libs) == 0 &&
+			len(staticCompiler.StaticProperties.Static.Static_libs) == 0 &&
+			len(sharedCompiler.SharedProperties.Shared.Static_libs) == 0 &&
+			len(staticCompiler.StaticProperties.Static.Shared_libs) == 0 &&
+			len(sharedCompiler.SharedProperties.Shared.Shared_libs) == 0 &&
+			staticCompiler.StaticProperties.Static.System_shared_libs == nil &&
+			sharedCompiler.SharedProperties.Shared.System_shared_libs == nil {
 
 			mctx.AddInterVariantDependency(reuseObjTag, shared, static)
 			sharedCompiler.baseCompiler.Properties.OriginalSrcs =
diff --git a/cc/testing.go b/cc/testing.go
index a0b1634..11a5e3b 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -239,6 +239,7 @@
 	os android.OsType) *android.TestContext {
 
 	ctx := android.NewTestArchContext()
+	ctx.RegisterModuleType("cc_defaults", android.ModuleFactoryAdaptor(defaultsFactory))
 	ctx.RegisterModuleType("cc_binary", android.ModuleFactoryAdaptor(BinaryFactory))
 	ctx.RegisterModuleType("cc_binary_host", android.ModuleFactoryAdaptor(binaryHostFactory))
 	ctx.RegisterModuleType("cc_fuzz", android.ModuleFactoryAdaptor(FuzzFactory))
@@ -264,6 +265,7 @@
 	ctx.PostDepsMutators(func(ctx android.RegisterMutatorsContext) {
 		ctx.TopDown("double_loadable", checkDoubleLoadableLibraries).Parallel()
 	})
+	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
 	ctx.RegisterSingletonType("vndk-snapshot", android.SingletonFactoryAdaptor(VndkSnapshotSingleton))
 
 	// add some modules that are required by the compiler and/or linker
@@ -274,6 +276,7 @@
 		"foo.c":       nil,
 		"foo.lds":     nil,
 		"bar.c":       nil,
+		"baz.c":       nil,
 		"baz.o":       nil,
 		"a.proto":     nil,
 		"b.aidl":      nil,