diff --git a/CleanSpec.mk b/CleanSpec.mk
index 59b7d68..998be2a 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -152,6 +152,12 @@
 
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# GCC 4.7
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/EXECUTABLES)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/lib/*.o)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 8be89c4..bc78174 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -34,8 +34,10 @@
 TARGET_ARCH_VARIANT := armv5te
 endif
 
-ifeq ($(strip $(TARGET_GCC_VERSION)),)
-TARGET_GCC_VERSION := 4.6
+ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
+TARGET_GCC_VERSION := 4.7
+else
+TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index dc28018..c549af9 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -34,8 +34,10 @@
 TARGET_ARCH_VARIANT := mips32r2-fp
 endif
 
-ifeq ($(strip $(TARGET_GCC_VERSION)),)
+ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
 TARGET_GCC_VERSION := 4.6
+else
+TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 187e2c2..01b5d02 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -22,8 +22,10 @@
 TARGET_ARCH_VARIANT := x86
 endif
 
-ifeq ($(strip $(TARGET_GCC_VERSION)),)
+ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
 TARGET_GCC_VERSION := 4.6
+else
+TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
 # Include the arch-variant-specific configuration file.