Include toolchain makefile based on the current config.

So we can have the same set of module names in different host arch
/ toolchain version combinations.

Change-Id: Iec66584bf3de92aedd71a59f9dbe74b6ed025b2e

core/combo/TARGET_linux-arm.mk

@@ -43,8 +43,8 @@ include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin/arm-linux-androideabi-
+TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
 endif
 
 # Only define these if there's actually a gcc in there.

core/combo/TARGET_linux-sh.mk

@@ -19,8 +19,8 @@
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/sh-4.3.3/bin/sh-linux-gnu-
+TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/sh-4.3.3
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/sh-linux-gnu-
 endif
 
 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)

core/combo/TARGET_linux-x86.mk

@@ -36,8 +36,8 @@ include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/i686-android-linux-4.4.3/bin/i686-android-linux-
+TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/i686-android-linux-4.4.3
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-android-linux-
 endif
 
 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)

libs/host/Android.mk

@@ -23,3 +23,5 @@ LOCAL_ACP_UNAVAILABLE:= true
 
 include $(BUILD_HOST_STATIC_LIBRARY)
 
+# Include toolchain prebuilt modules if they exist.
+-include $(TARGET_TOOLCHAIN_ROOT)/toolchain.mk