diff --git a/android/androidmk.go b/android/androidmk.go
index 2732c82..46e7fcf 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -43,9 +43,11 @@
 	OutputFile OptionalPath
 	Disabled   bool
 
-	Custom func(w io.Writer, name, prefix, moduleDir string)
+	Custom func(w io.Writer, name, prefix, moduleDir string, data AndroidMkData)
 
 	Extra []AndroidMkExtraFunc
+
+	preamble bytes.Buffer
 }
 
 type AndroidMkExtraFunc func(w io.Writer, outputFile Path)
@@ -166,50 +168,32 @@
 		return nil
 	}
 
-	if data.SubName != "" {
-		name += data.SubName
-	}
+	prefix := ""
+	if amod.ArchSpecific() {
+		switch amod.Os().Class {
+		case Host:
+			prefix = "HOST_"
+		case HostCross:
+			prefix = "HOST_CROSS_"
+		case Device:
+			prefix = "TARGET_"
 
-	if data.Custom != nil {
-		prefix := ""
-		if amod.ArchSpecific() {
-			switch amod.Os().Class {
-			case Host:
-				prefix = "HOST_"
-			case HostCross:
-				prefix = "HOST_CROSS_"
-			case Device:
-				prefix = "TARGET_"
-
-			}
-
-			config := ctx.Config().(Config)
-			if amod.Arch().ArchType != config.Targets[amod.Os().Class][0].Arch.ArchType {
-				prefix = "2ND_" + prefix
-			}
 		}
 
-		data.Custom(w, name, prefix, filepath.Dir(ctx.BlueprintFile(mod)))
-
-		return nil
+		config := ctx.Config().(Config)
+		if amod.Arch().ArchType != config.Targets[amod.Os().Class][0].Arch.ArchType {
+			prefix = "2ND_" + prefix
+		}
 	}
 
-	if data.Disabled {
-		return nil
-	}
-
-	if !data.OutputFile.Valid() {
-		return nil
-	}
-
-	fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
-	fmt.Fprintln(w, "LOCAL_PATH :=", filepath.Dir(ctx.BlueprintFile(mod)))
-	fmt.Fprintln(w, "LOCAL_MODULE :=", name)
-	fmt.Fprintln(w, "LOCAL_MODULE_CLASS :=", data.Class)
-	fmt.Fprintln(w, "LOCAL_PREBUILT_MODULE_FILE :=", data.OutputFile.String())
+	fmt.Fprintln(&data.preamble, "\ninclude $(CLEAR_VARS)")
+	fmt.Fprintln(&data.preamble, "LOCAL_PATH :=", filepath.Dir(ctx.BlueprintFile(mod)))
+	fmt.Fprintln(&data.preamble, "LOCAL_MODULE :=", name+data.SubName)
+	fmt.Fprintln(&data.preamble, "LOCAL_MODULE_CLASS :=", data.Class)
+	fmt.Fprintln(&data.preamble, "LOCAL_PREBUILT_MODULE_FILE :=", data.OutputFile.String())
 
 	if len(amod.commonProperties.Required) > 0 {
-		fmt.Fprintln(w, "LOCAL_REQUIRED_MODULES := "+strings.Join(amod.commonProperties.Required, " "))
+		fmt.Fprintln(&data.preamble, "LOCAL_REQUIRED_MODULES := "+strings.Join(amod.commonProperties.Required, " "))
 	}
 
 	archStr := amod.Arch().ArchType.String()
@@ -218,48 +202,68 @@
 	case Host:
 		// Make cannot identify LOCAL_MODULE_HOST_ARCH:= common.
 		if archStr != "common" {
-			fmt.Fprintln(w, "LOCAL_MODULE_HOST_ARCH :=", archStr)
+			fmt.Fprintln(&data.preamble, "LOCAL_MODULE_HOST_ARCH :=", archStr)
 		}
 		host = true
 	case HostCross:
 		// Make cannot identify LOCAL_MODULE_HOST_CROSS_ARCH:= common.
 		if archStr != "common" {
-			fmt.Fprintln(w, "LOCAL_MODULE_HOST_CROSS_ARCH :=", archStr)
+			fmt.Fprintln(&data.preamble, "LOCAL_MODULE_HOST_CROSS_ARCH :=", archStr)
 		}
 		host = true
 	case Device:
 		// Make cannot identify LOCAL_MODULE_TARGET_ARCH:= common.
 		if archStr != "common" {
-			fmt.Fprintln(w, "LOCAL_MODULE_TARGET_ARCH :=", archStr)
+			fmt.Fprintln(&data.preamble, "LOCAL_MODULE_TARGET_ARCH :=", archStr)
 		}
 
 		if len(amod.commonProperties.Logtags) > 0 {
-			fmt.Fprintln(w, "LOCAL_LOGTAGS_FILES := ", strings.Join(amod.commonProperties.Logtags, " "))
+			fmt.Fprintln(&data.preamble, "LOCAL_LOGTAGS_FILES := ", strings.Join(amod.commonProperties.Logtags, " "))
 		}
 		if len(amod.commonProperties.Init_rc) > 0 {
-			fmt.Fprintln(w, "LOCAL_INIT_RC := ", strings.Join(amod.commonProperties.Init_rc, " "))
+			fmt.Fprintln(&data.preamble, "LOCAL_INIT_RC := ", strings.Join(amod.commonProperties.Init_rc, " "))
 		}
 		if amod.commonProperties.Proprietary {
-			fmt.Fprintln(w, "LOCAL_PROPRIETARY_MODULE := true")
+			fmt.Fprintln(&data.preamble, "LOCAL_PROPRIETARY_MODULE := true")
 		}
 		if amod.commonProperties.Vendor {
-			fmt.Fprintln(w, "LOCAL_VENDOR_MODULE := true")
+			fmt.Fprintln(&data.preamble, "LOCAL_VENDOR_MODULE := true")
 		}
 		if amod.commonProperties.Owner != nil {
-			fmt.Fprintln(w, "LOCAL_MODULE_OWNER :=", *amod.commonProperties.Owner)
+			fmt.Fprintln(&data.preamble, "LOCAL_MODULE_OWNER :=", *amod.commonProperties.Owner)
 		}
 	}
 
 	if host {
-		fmt.Fprintln(w, "LOCAL_MODULE_HOST_OS :=", amod.Os().String())
-		fmt.Fprintln(w, "LOCAL_IS_HOST_MODULE := true")
+		fmt.Fprintln(&data.preamble, "LOCAL_MODULE_HOST_OS :=", amod.Os().String())
+		fmt.Fprintln(&data.preamble, "LOCAL_IS_HOST_MODULE := true")
 	}
 
+	blueprintDir := filepath.Dir(ctx.BlueprintFile(mod))
+
+	if data.Custom != nil {
+		data.Custom(w, name, prefix, blueprintDir, data)
+	} else {
+		WriteAndroidMkData(w, data)
+	}
+
+	return nil
+}
+
+func WriteAndroidMkData(w io.Writer, data AndroidMkData) {
+	if data.Disabled {
+		return
+	}
+
+	if !data.OutputFile.Valid() {
+		return
+	}
+
+	w.Write(data.preamble.Bytes())
+
 	for _, extra := range data.Extra {
 		extra(w, data.OutputFile.Path())
 	}
 
 	fmt.Fprintln(w, "include $(BUILD_PREBUILT)")
-
-	return nil
 }
diff --git a/cc/androidmk.go b/cc/androidmk.go
index 4421b1c..fc45b7a 100644
--- a/cc/androidmk.go
+++ b/cc/androidmk.go
@@ -136,10 +136,10 @@
 
 		ret.Class = "SHARED_LIBRARIES"
 	} else if library.header() {
-		ret.Custom = func(w io.Writer, name, prefix, moduleDir string) {
+		ret.Custom = func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
 			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
 			fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
-			fmt.Fprintln(w, "LOCAL_MODULE :=", name)
+			fmt.Fprintln(w, "LOCAL_MODULE :=", name+data.SubName)
 
 			archStr := ctx.Target().Arch.ArchType.String()
 			var host bool
@@ -194,10 +194,10 @@
 }
 
 func (object *objectLinker) AndroidMk(ctx AndroidMkContext, ret *android.AndroidMkData) {
-	ret.Custom = func(w io.Writer, name, prefix, moduleDir string) {
+	ret.Custom = func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
 		out := ret.OutputFile.Path()
 
-		fmt.Fprintln(w, "\n$("+prefix+"OUT_INTERMEDIATE_LIBRARIES)/"+name+objectExtension+":", out.String())
+		fmt.Fprintln(w, "\n$("+prefix+"OUT_INTERMEDIATE_LIBRARIES)/"+name+data.SubName+objectExtension+":", out.String())
 		fmt.Fprintln(w, "\t$(copy-file-to-target)")
 	}
 }
diff --git a/phony/phony.go b/phony/phony.go
index 5f0187f..a39b5d5 100644
--- a/phony/phony.go
+++ b/phony/phony.go
@@ -50,7 +50,7 @@
 
 func (p *phony) AndroidMk() android.AndroidMkData {
 	return android.AndroidMkData{
-		Custom: func(w io.Writer, name, prefix, moduleDir string) {
+		Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
 			fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
 			fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
 			fmt.Fprintln(w, "LOCAL_MODULE :=", name)