diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index baf4f3f..2123eb6 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -18,56 +18,56 @@
 # Included by combo/select.mk
 
 # Provide a default variant.
-ifeq ($(strip $(TARGET_ARCH_VARIANT)),)
-TARGET_ARCH_VARIANT := x86
+ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
+TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := x86
 endif
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
 else
-TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
 # Include the arch-variant-specific configuration file.
 # Its role is to define various ARCH_X86_HAVE_XXX feature macros,
 # plus initial values for TARGET_GLOBAL_CFLAGS
 #
-TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
+TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
-$(error Unknown $(TARGET_ARCH) architecture version: $(TARGET_ARCH_VARIANT))
+$(error Unknown $(TARGET_$(combo_2nd_arch_prefix)ARCH) architecture version: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
 endif
 
 include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
-ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$(TARGET_GCC_VERSION)
-TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/x86_64-linux-android-
+ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
+$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/x86_64-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
+$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/x86_64-linux-android-
 endif
 
-TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
-TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
-TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
-TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
-TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
-TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
+$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
 
 ifeq ($(TARGET_BUILD_VARIANT),user)
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@
+$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@
 else
-TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@ && \
+$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-debug $< -o $@ && \
     $(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
 endif
 
-ifneq ($(wildcard $(TARGET_CC)),)
-TARGET_LIBGCC := \
-	$(shell $(TARGET_CC) -m32 -print-file-name=libgcc.a)
-target_libgcov := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
+ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
+$(combo_2nd_arch_prefix)TARGET_LIBGCC := \
+	$(shell $($(combo_2nd_arch_prefix)TARGET_CC) -m32 -print-file-name=libgcc.a)
+target_libgcov := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
 	-print-file-name=libgcov.a)
 endif
 
-TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
+$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
 
 libc_root := bionic/libc
 libm_root := bionic/libm
@@ -75,29 +75,29 @@
 
 # Define FDO (Feedback Directed Optimization) options.
 
-TARGET_FDO_CFLAGS:=
-TARGET_FDO_LIB:=
+$(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS:=
+$(combo_2nd_arch_prefix)TARGET_FDO_LIB:=
 
 ifneq ($(strip $(BUILD_FDO_INSTRUMENT)),)
   # Set BUILD_FDO_INSTRUMENT=true to turn on FDO instrumentation.
   # The profile will be generated on /data/local/tmp/profile on the device.
-  TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
-  TARGET_FDO_LIB := $(target_libgcov)
+  $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-generate=/data/local/tmp/profile -DANDROID_FDO
+  $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
 else
   # If BUILD_FDO_INSTRUMENT is turned off, then consider doing the FDO optimizations.
   # Set TARGET_FDO_PROFILE_PATH to set a custom profile directory for your build.
-  ifeq ($(strip $(TARGET_FDO_PROFILE_PATH)),)
-    TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT)
+  ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH)),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH := fdo/profiles/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)
   else
-    ifeq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-      $(warning Custom TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
+    ifeq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+      $(warning Custom $(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH supplied, but directory does not exist. Turn off FDO.)
     endif
   endif
 
   # If the FDO profile directory can't be found, then FDO is off.
-  ifneq ($(strip $(wildcard $(TARGET_FDO_PROFILE_PATH))),)
-    TARGET_FDO_CFLAGS := -fprofile-use=$(TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
-    TARGET_FDO_LIB := $(target_libgcov)
+  ifneq ($(strip $(wildcard $($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH))),)
+    $(combo_2nd_arch_prefix)TARGET_FDO_CFLAGS := -fprofile-use=$($(combo_2nd_arch_prefix)TARGET_FDO_PROFILE_PATH) -DANDROID_FDO
+    $(combo_2nd_arch_prefix)TARGET_FDO_LIB := $(target_libgcov)
   endif
 endif
 
@@ -107,7 +107,7 @@
 
 android_config_h := $(call select-android-config-h,target_linux-x86)
 
-TARGET_GLOBAL_CFLAGS += \
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
 			-O2 \
 			-Ulinux \
 			-Wa,--noexecstack \
@@ -128,36 +128,36 @@
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))
 
-TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += $(arch_variant_cflags)
 
 ifeq ($(ARCH_X86_HAVE_SSSE3),true)   # yes, really SSSE3, not SSE3!
-    TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 -mssse3
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -DUSE_SSSE3 -mssse3
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4),true)
-    TARGET_GLOBAL_CFLAGS += -msse4
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4_1),true)
-    TARGET_GLOBAL_CFLAGS += -msse4.1
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4.1
 endif
 ifeq ($(ARCH_X86_HAVE_SSE4_2),true)
-    TARGET_GLOBAL_CFLAGS += -msse4.2
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -msse4.2
 endif
 ifeq ($(ARCH_X86_HAVE_AVX),true)
-    TARGET_GLOBAL_CFLAGS += -mavx
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -mavx
 endif
 ifeq ($(ARCH_X86_HAVE_AES_NI),true)
-    TARGET_GLOBAL_CFLAGS += -maes
+    $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -maes
 endif
 
-TARGET_GLOBAL_LDFLAGS += -m32
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -m32
 
-TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
-TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
-TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel
-TARGET_GLOBAL_LDFLAGS += -Wl,--fatal-warnings
-TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--warn-shared-textrel
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--fatal-warnings
+$(combo_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
 
-TARGET_C_INCLUDES := \
+$(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-x86/include \
 	$(libc_root)/include \
 	$(libstdc++_root)/include \
@@ -165,19 +165,19 @@
 	$(libm_root)/include \
 	$(libm_root)/include/i387 \
 
-TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
-TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
-TARGET_CRTEND_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_STATIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_DYNAMIC_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
 
-TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
-TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTBEGIN_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
+$(combo_2nd_arch_prefix)TARGET_CRTEND_SO_O := $($(combo_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
 
-TARGET_STRIP_MODULE:=true
+$(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
 
-TARGET_CUSTOM_LD_COMMAND := true
-define transform-o-to-shared-lib-inner
+$(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
+define $(combo_2nd_arch_prefix)transform-o-to-shared-lib-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	 -nostdlib -Wl,-soname,$(notdir $@) \
@@ -200,7 +200,7 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 endef
 
-define transform-o-to-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bdynamic \
@@ -225,7 +225,7 @@
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
 endef
 
-define transform-o-to-static-executable-inner
+define $(combo_2nd_arch_prefix)transform-o-to-static-executable-inner
 $(hide) $(PRIVATE_CXX) \
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	-nostdlib -Bstatic \