diff --git a/CleanSpec.mk b/CleanSpec.mk
index a4a44ca..687712a 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -284,6 +284,9 @@
 
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system)
 
+# Switch host builds to Clang by default
+$(call add-clean-step, rm -rf $(OUT_DIR)/host)
+
 # Adding dalvik.vm.dex2oat-filter
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
diff --git a/core/Makefile b/core/Makefile
index 6c49580..25d9c19 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -740,7 +740,7 @@
 recovery_kernel := $(INSTALLED_KERNEL_TARGET) # same as a non-recovery system
 recovery_ramdisk := $(PRODUCT_OUT)/ramdisk-recovery.img
 recovery_build_prop := $(INSTALLED_BUILD_PROP_TARGET)
-recovery_binary := $(call intermediates-dir-for,EXECUTABLES,recovery)/recovery
+recovery_binary := $(call intermediates-dir-for,EXECUTABLES,recovery,,,$(TARGET_PREFER_32_BIT))/recovery
 recovery_resources_common := $(call include-path-for, recovery)/res
 
 # Set recovery_density to the density bucket of the device.
@@ -1292,11 +1292,11 @@
 endef
 
 built_ota_tools := \
-	$(call intermediates-dir-for,EXECUTABLES,applypatch)/applypatch \
-	$(call intermediates-dir-for,EXECUTABLES,applypatch_static)/applypatch_static \
-	$(call intermediates-dir-for,EXECUTABLES,check_prereq)/check_prereq \
-	$(call intermediates-dir-for,EXECUTABLES,sqlite3)/sqlite3 \
-	$(call intermediates-dir-for,EXECUTABLES,updater)/updater
+	$(call intermediates-dir-for,EXECUTABLES,applypatch,,,$(TARGET_PREFER_32_BIT))/applypatch \
+	$(call intermediates-dir-for,EXECUTABLES,applypatch_static,,,$(TARGET_PREFER_32_BIT))/applypatch_static \
+	$(call intermediates-dir-for,EXECUTABLES,check_prereq,,,$(TARGET_PREFER_32_BIT))/check_prereq \
+	$(call intermediates-dir-for,EXECUTABLES,sqlite3,,,$(TARGET_PREFER_32_BIT))/sqlite3 \
+	$(call intermediates-dir-for,EXECUTABLES,updater,,,$(TARGET_PREFER_32_BIT))/updater
 $(BUILT_TARGET_FILES_PACKAGE): PRIVATE_OTA_TOOLS := $(built_ota_tools)
 
 $(BUILT_TARGET_FILES_PACKAGE): PRIVATE_RECOVERY_API_VERSION := $(RECOVERY_API_VERSION)
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 8c25897..a709365 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -562,27 +562,27 @@
 ###########################################################
 ## CHECK_BUILD goals
 ###########################################################
-
-ifdef java_alternative_checked_module
-  LOCAL_CHECKED_MODULE := $(java_alternative_checked_module)
-endif
-
+my_checked_module :=
 # If nobody has defined a more specific module for the
 # checked modules, use LOCAL_BUILT_MODULE.
-ifndef LOCAL_CHECKED_MODULE
-  LOCAL_CHECKED_MODULE := $(LOCAL_BUILT_MODULE)
+ifdef LOCAL_CHECKED_MODULE
+  my_checked_module := $(LOCAL_CHECKED_MODULE)
+else ifdef java_alternative_checked_module
+  my_checked_module := $(java_alternative_checked_module)
+else
+  my_checked_module := $(LOCAL_BUILT_MODULE)
 endif
 
 # If they request that this module not be checked, then don't.
 # PLEASE DON'T SET THIS.  ANY PLACES THAT SET THIS WITHOUT
 # GOOD REASON WILL HAVE IT REMOVED.
 ifdef LOCAL_DONT_CHECK_MODULE
-  LOCAL_CHECKED_MODULE :=
+  my_checked_module :=
 endif
 # Don't check build target module defined for the 2nd arch
 ifndef LOCAL_IS_HOST_MODULE
 ifdef LOCAL_2ND_ARCH_VAR_PREFIX
-  LOCAL_CHECKED_MODULE :=
+  my_checked_module :=
 endif
 endif
 
@@ -601,7 +601,7 @@
 ALL_MODULES.$(my_register_name).TAGS := \
     $(ALL_MODULES.$(my_register_name).TAGS) $(my_module_tags)
 ALL_MODULES.$(my_register_name).CHECKED := \
-    $(ALL_MODULES.$(my_register_name).CHECKED) $(LOCAL_CHECKED_MODULE)
+    $(ALL_MODULES.$(my_register_name).CHECKED) $(my_checked_module)
 ALL_MODULES.$(my_register_name).BUILT := \
     $(ALL_MODULES.$(my_register_name).BUILT) $(LOCAL_BUILT_MODULE)
 ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
@@ -675,9 +675,9 @@
 endif
 
 ifdef j_or_n
-$(j_or_n) $(h_or_t) $(j_or_n)-$(h_or_t) : $(LOCAL_CHECKED_MODULE)
+$(j_or_n) $(h_or_t) $(j_or_n)-$(h_or_t) : $(my_checked_module)
 ifneq (,$(filter $(my_module_tags),tests))
-$(j_or_n)-$(h_or_t)-tests $(j_or_n)-tests $(h_or_t)-tests : $(LOCAL_CHECKED_MODULE)
+$(j_or_n)-$(h_or_t)-tests $(j_or_n)-tests $(h_or_t)-tests : $(my_checked_module)
 endif
 endif
 
diff --git a/core/binary.mk b/core/binary.mk
index 1e313ff..7b51bc2 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -107,16 +107,18 @@
 my_cflags := $(LOCAL_CFLAGS)
 my_cppflags := $(LOCAL_CPPFLAGS)
 my_ldflags := $(LOCAL_LDFLAGS)
+my_ldlibs := $(LOCAL_LDLIBS)
 my_asflags := $(LOCAL_ASFLAGS)
 my_cc := $(LOCAL_CC)
 my_cxx := $(LOCAL_CXX)
 my_c_includes := $(LOCAL_C_INCLUDES)
 my_generated_sources := $(LOCAL_GENERATED_SOURCES)
+my_native_coverage := $(LOCAL_NATIVE_COVERAGE)
 
 # MinGW spits out warnings about -fPIC even for -fpie?!) being ignored because
 # all code is position independent, and then those warnings get promoted to
 # errors.
-ifeq ($(strip $(USE_MINGW)),)
+ifndef USE_MINGW
 ifeq ($(LOCAL_MODULE_CLASS),EXECUTABLES)
 my_cflags += -fpie
 else
@@ -133,12 +135,29 @@
 my_c_includes += $(LOCAL_C_INCLUDES_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_C_INCLUDES_$(my_32_64_bit_suffix))
 my_generated_sources += $(LOCAL_GENERATED_SOURCES_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_GENERATED_SOURCES_$(my_32_64_bit_suffix))
 
-my_clang := $(LOCAL_CLANG)
+my_clang := $(strip $(LOCAL_CLANG))
 ifdef LOCAL_CLANG_$(my_32_64_bit_suffix)
-my_clang := $(LOCAL_CLANG_$(my_32_64_bit_suffix))
+my_clang := $(strip $(LOCAL_CLANG_$(my_32_64_bit_suffix)))
 endif
 ifdef LOCAL_CLANG_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)
-my_clang := $(LOCAL_CLANG_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
+my_clang := $(strip $(LOCAL_CLANG_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)))
+endif
+
+# clang is enabled by default for host builds
+# enable it unless we've specifically disabled clang above
+ifdef LOCAL_IS_HOST_MODULE
+    ifneq ($(HOST_OS),windows)
+    ifeq ($(my_clang),)
+        my_clang := true
+    endif
+    endif
+endif
+
+# Add option to make clang the default for device build
+ifeq ($(USE_CLANG_PLATFORM_BUILD),true)
+    ifeq ($(my_clang),)
+        my_clang := true
+    endif
 endif
 
 # arch-specific static libraries go first so that generic ones can depend on them
@@ -147,12 +166,7 @@
 
 my_cflags := $(filter-out $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)GLOBAL_UNSUPPORTED_CFLAGS),$(my_cflags))
 
-
-# Replace libstdc++ with libc++ if it's seen
-my_libcxx := $(filter libc++, $(my_shared_libraries))
-ifdef my_libcxx
-my_system_shared_libraries := $(filter-out libstdc++, $(my_system_shared_libraries))
-endif
+include $(BUILD_SYSTEM)/cxx_stl_setup.mk
 
 # Add static HAL libraries
 ifdef LOCAL_HAL_STATIC_LIBRARIES
@@ -169,8 +183,21 @@
   LOCAL_ARM_MODE := arm
   my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
   my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
-  my_shared_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
-  my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
+  ifdef LOCAL_IS_HOST_MODULE
+      my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS_HOST)
+      my_ldlibs += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDLIBS_HOST)
+      my_shared_libraries += \
+          $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES_HOST)
+      my_static_libraries += \
+          $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES_HOST)
+  else
+      my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS_TARGET)
+      my_ldlibs += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDLIBS_TARGET)
+      my_shared_libraries += \
+          $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES_TARGET)
+      my_static_libraries += \
+          $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES_TARGET)
+  endif
 endif
 
 ifeq ($(strip $($(LOCAL_2ND_ARCH_VAR_PREFIX)WITHOUT_$(my_prefix)CLANG)),true)
@@ -182,9 +209,7 @@
   my_static_libraries += $(COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES)
 endif
 
-my_compiler_dependencies :=
-
-##################################################################
+####################################################
 ## Add FDO flags if FDO is turned on and supported
 ## Please note that we will do option filtering during FDO build.
 ## i.e. Os->O2, remove -fno-early-inline and -finline-limit.
@@ -245,13 +270,39 @@
 my_target_global_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_TARGET_GLOBAL_CFLAGS)
 my_target_global_cppflags += $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_TARGET_GLOBAL_CPPFLAGS)
 my_target_global_ldflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_TARGET_GLOBAL_LDFLAGS)
-my_target_c_includes += $(CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES)
 else
 my_target_global_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CFLAGS)
 my_target_global_cppflags += $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CPPFLAGS)
 my_target_global_ldflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LDFLAGS)
 endif # my_clang
 
+# To enable coverage for a given module, set LOCAL_NATIVE_COVERAGE=true and
+# build with NATIVE_COVERAGE=true in your enviornment. Note that the build
+# system is not sensitive to changes to NATIVE_COVERAGE, so you should do a
+# clean build of your module after toggling it.
+ifeq ($(NATIVE_COVERAGE),true)
+    ifeq ($(my_native_coverage),true)
+        # We can't currently generate coverage for clang binaries for two
+        # reasons:
+        #
+        # 1) b/17574078 We currently don't have a prebuilt
+        #    libclang_rt.profile-<ARCH>.a, which clang is hardcoded to link if
+        #    --coverage is passed in the link stage. For now we manually link
+        #    libprofile_rt (which is the name it is built as from
+        #    external/compiler-rt).
+        #
+        # 2) b/17583330 Clang doesn't generate .gcno files when using
+        #    -no-integrated-as. Since most of the assembly in our tree is
+        #    incompatible with clang's assembler, we can't turn off this flag.
+        ifneq ($(my_clang),true)
+            my_cflags += --coverage -O0
+            my_ldflags += --coverage
+        endif
+    endif
+else
+    my_native_coverage := false
+endif
+
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_PROJECT_INCLUDES := $(my_target_project_includes)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_C_INCLUDES := $(my_target_c_includes)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_CFLAGS := $(my_target_global_cflags)
@@ -264,7 +315,7 @@
 my_host_global_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_HOST_GLOBAL_CFLAGS)
 my_host_global_cppflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_HOST_GLOBAL_CPPFLAGS)
 my_host_global_ldflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)CLANG_HOST_GLOBAL_LDFLAGS)
-my_host_c_includes := $($(LOCAL_2ND_ARCH_VAR_PREFIX)HOST_C_INCLUDES) $(CLANG_CONFIG_EXTRA_HOST_C_INCLUDES)
+my_host_c_includes := $($(LOCAL_2ND_ARCH_VAR_PREFIX)HOST_C_INCLUDES)
 else
 my_host_global_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_CFLAGS)
 my_host_global_cppflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_CPPFLAGS)
@@ -299,7 +350,7 @@
 endif
 
 ifeq ($(strip $(my_cc)),)
-  ifeq ($(strip $(my_clang)),true)
+  ifeq ($(my_clang),true)
     my_cc := $(CLANG)
   else
     my_cc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)CC)
@@ -315,7 +366,7 @@
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CC := $(my_cc)
 
 ifeq ($(strip $(my_cxx)),)
-  ifeq ($(strip $(my_clang)),true)
+  ifeq ($(my_clang),true)
     my_cxx := $(CLANG_CXX)
   else
     my_cxx := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)CXX)
@@ -365,7 +416,7 @@
 # actually used (although they are usually empty).
 arm_objects_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)$(arm_objects_mode)_CFLAGS)
 normal_objects_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)$(normal_objects_mode)_CFLAGS)
-ifeq ($(strip $(my_clang)),true)
+ifeq ($(my_clang),true)
 arm_objects_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(arm_objects_cflags))
 normal_objects_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(normal_objects_cflags))
 endif
@@ -615,8 +666,7 @@
 $(cpp_objects): $(intermediates)/%.o: \
     $(TOPDIR)$(LOCAL_PATH)/%$(LOCAL_CPP_EXTENSION) \
     $(yacc_cpps) $(proto_generated_headers) \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)cpp-to-o)
 -include $(cpp_objects:%.o=%.P)
 endif
@@ -636,8 +686,7 @@
 $(gen_cpp_objects): $(intermediates)/%.o: \
     $(intermediates)/%$(LOCAL_CPP_EXTENSION) $(yacc_cpps) \
     $(proto_generated_headers) \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)cpp-to-o)
 -include $(gen_cpp_objects:%.o=%.P)
 endif
@@ -651,8 +700,7 @@
 
 ifneq ($(strip $(gen_S_sources)),)
 $(gen_S_objects): $(intermediates)/%.o: $(intermediates)/%.S \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)s-to-o)
 -include $(gen_S_objects:%.o=%.P)
 endif
@@ -662,8 +710,7 @@
 
 ifneq ($(strip $(gen_s_objects)),)
 $(gen_s_objects): $(intermediates)/%.o: $(intermediates)/%.s \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)s-to-o-no-deps)
 -include $(gen_s_objects:%.o=%.P)
 endif
@@ -695,8 +742,7 @@
 
 ifneq ($(strip $(c_objects)),)
 $(c_objects): $(intermediates)/%.o: $(TOPDIR)$(LOCAL_PATH)/%.c $(yacc_cpps) $(proto_generated_headers) \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)c-to-o)
 -include $(c_objects:%.o=%.P)
 endif
@@ -714,8 +760,7 @@
 $(gen_c_objects): PRIVATE_ARM_MODE := $(normal_objects_mode)
 $(gen_c_objects): PRIVATE_ARM_CFLAGS := $(normal_objects_cflags)
 $(gen_c_objects): $(intermediates)/%.o: $(intermediates)/%.c $(yacc_cpps) $(proto_generated_headers) \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)c-to-o)
 -include $(gen_c_objects:%.o=%.P)
 endif
@@ -729,8 +774,7 @@
 
 ifneq ($(strip $(objc_objects)),)
 $(objc_objects): $(intermediates)/%.o: $(TOPDIR)$(LOCAL_PATH)/%.m $(yacc_cpps) $(proto_generated_headers) \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)m-to-o)
 -include $(objc_objects:%.o=%.P)
 endif
@@ -744,8 +788,7 @@
 
 ifneq ($(strip $(asm_objects_S)),)
 $(asm_objects_S): $(intermediates)/%.o: $(TOPDIR)$(LOCAL_PATH)/%.S \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)s-to-o)
 -include $(asm_objects_S:%.o=%.P)
 endif
@@ -755,8 +798,7 @@
 
 ifneq ($(strip $(asm_objects_s)),)
 $(asm_objects_s): $(intermediates)/%.o: $(TOPDIR)$(LOCAL_PATH)/%.s \
-    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
-    | $(my_compiler_dependencies)
+    $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	$(transform-$(PRIVATE_HOST)s-to-o-no-deps)
 -include $(asm_objects_s:%.o=%.P)
 endif
@@ -919,6 +961,14 @@
 ###########################################################
 
 ifeq ($(my_clang),true)
+my_cflags += $(LOCAL_CLANG_CFLAGS)
+my_cpplags += $(LOCAL_CLANG_CPPFLAGS)
+my_asflags += $(LOCAL_CLANG_ASFLAGS)
+my_ldflags += $(LOCAL_CLANG_LDFLAGS)
+my_cflags += $(LOCAL_CLANG_CFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_CFLAGS_$(my_32_64_bit_suffix))
+my_cppflags += $(LOCAL_CLANG_CPPFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_CPPFLAGS_$(my_32_64_bit_suffix))
+my_ldflags += $(LOCAL_CLANG_LDFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_LDFLAGS_$(my_32_64_bit_suffix))
+my_asflags += $(LOCAL_CLANG_ASFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_ASFLAGS_$(my_32_64_bit_suffix))
 my_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_cflags))
 my_cppflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_cppflags))
 my_asflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_asflags))
@@ -950,7 +1000,7 @@
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_C_INCLUDES := $(my_c_includes)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_IMPORT_INCLUDES := $(import_includes)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LDFLAGS := $(my_ldflags)
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LDLIBS := $(LOCAL_LDLIBS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LDLIBS := $(my_ldlibs)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_NO_CRT := $(strip $(LOCAL_NO_CRT) $(LOCAL_NO_CRT_$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)))
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LIBCXX := $(my_libcxx)
 
diff --git a/core/clang/HOST_x86.mk b/core/clang/HOST_x86.mk
index 510a74d..fb5cbf4 100644
--- a/core/clang/HOST_x86.mk
+++ b/core/clang/HOST_x86.mk
@@ -11,6 +11,10 @@
 endif
 ifeq ($(HOST_OS),darwin)
 CLANG_CONFIG_x86_HOST_TRIPLE := i686-apple-darwin
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_ASFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_ASFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_CFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CPPFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_CPPFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_LDFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_LDFLAGS)
 endif
 ifeq ($(HOST_OS),windows)
 CLANG_CONFIG_x86_HOST_TRIPLE := i686-pc-mingw32
diff --git a/core/clang/HOST_x86_64.mk b/core/clang/HOST_x86_64.mk
index 6b94525..5f70678 100644
--- a/core/clang/HOST_x86_64.mk
+++ b/core/clang/HOST_x86_64.mk
@@ -11,6 +11,10 @@
 endif
 ifeq ($(HOST_OS),darwin)
 CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-apple-darwin
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_ASFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_ASFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_CFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CPPFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_CPPFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_LDFLAGS := $(CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_LDFLAGS)
 endif
 ifeq ($(HOST_OS),windows)
 CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-pc-mingw64
diff --git a/core/clang/HOST_x86_common.mk b/core/clang/HOST_x86_common.mk
index 0241cb6..92058e1 100644
--- a/core/clang/HOST_x86_common.mk
+++ b/core/clang/HOST_x86_common.mk
@@ -1,7 +1,11 @@
 # Shared by HOST_x86.mk and HOST_x86_64.mk.
 
 ifeq ($(HOST_OS),darwin)
-# nothing required here yet
+CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_ASFLAGS := \
+  -integrated-as
+
+CLANG_CONFIG_x86_DARWIN_HOST_EXTRA_CFLAGS := \
+  -integrated-as
 endif
 
 ifeq ($(HOST_OS),linux)
@@ -18,34 +22,34 @@
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CPPFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
   --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6 \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6/x86_64-linux \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6/backward \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8 \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8/x86_64-linux \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8/backward \
   -no-integrated-as
 
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
   --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
   -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin \
-  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.6 \
-  -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.6 \
+  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.8 \
+  -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.8 \
   -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/lib64/ \
   -no-integrated-as
 else
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CPPFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
   --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6 \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6/x86_64-linux/32 \
-  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.6/backward \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8 \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8/x86_64-linux/32 \
+  -isystem $($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/include/c++/4.8/backward \
   -no-integrated-as
 
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
   --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
   -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin \
-  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.6/32 \
-  -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.6/32 \
+  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.8/32 \
+  -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/x86_64-linux/4.8/32 \
   -L$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/lib32/ \
   -no-integrated-as
 endif
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 91067f5..b7e40e3 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -9,6 +9,7 @@
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_TARGET_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_mips_EXTRA_ASFLAGS) \
+  -fPIC \
   -target $(CLANG_CONFIG_mips_TARGET_TRIPLE) \
   -B$(CLANG_CONFIG_mips_TARGET_TOOLCHAIN_PREFIX)
 
diff --git a/core/clang/arm.mk b/core/clang/arm.mk
index 22c7397..f979409 100644
--- a/core/clang/arm.mk
+++ b/core/clang/arm.mk
@@ -19,9 +19,15 @@
   -fgcse-after-reload \
   -frerun-cse-after-loop \
   -frename-registers \
-  -fno-builtin-sin \
-  -fno-strict-volatile-bitfields \
   -fno-align-jumps \
+  -fno-builtin-sin \
+  -fno-caller-saves \
+  -fno-early-inlining \
+  -fno-move-loop-invariants \
+  -fno-partial-inlining \
+  -fno-strict-volatile-bitfields \
+  -fno-tree-copy-prop \
+  -fno-tree-loop-optimize \
   -Wa,--noexecstack
 
 define subst-clang-incompatible-arm-flags
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 5b2aea5..5a76049 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -6,8 +6,8 @@
 WITHOUT_HOST_CLANG := true
 endif
 
-LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.5/bin
-LLVM_PREBUILTS_HEADER_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.5/lib/clang/3.5/include/
+LLVM_PREBUILTS_VERSION := 3.5
+LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/$(LLVM_PREBUILTS_VERSION)/bin
 
 CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
 CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)
@@ -42,17 +42,25 @@
 CLANG_CONFIG_EXTRA_CFLAGS += \
   -Werror=int-conversion
 
+# Workaround for ccache with clang.
+# See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
+CLANG_CONFIG_EXTRA_CFLAGS += \
+  -Wno-unused-command-line-argument
+
 CLANG_CONFIG_UNKNOWN_CFLAGS := \
-  -funswitch-loops \
-  -fno-tree-sra \
   -finline-limit=64 \
+  -fno-canonical-system-headers \
+  -fno-tree-sra \
+  -funswitch-loops \
+  -Wmaybe-uninitialized \
+  -Wno-error=maybe-uninitialized \
+  -Wno-literal-suffix \
+  -Wno-maybe-uninitialized \
+  -Wno-old-style-declaration \
   -Wno-psabi \
   -Wno-unused-but-set-variable \
   -Wno-unused-but-set-parameter \
-  -Wmaybe-uninitialized \
-  -Wno-maybe-uninitialized \
-  -Wno-error=maybe-uninitialized \
-  -fno-canonical-system-headers
+  -Wno-unused-local-typedefs
 
 # Clang flags for all host rules
 CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
@@ -86,17 +94,20 @@
 include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
 endif
 
-
-# Clang compiler-specific libc headers
-CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH)
-CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH) $(TARGET_OUT_HEADERS)/clang
-
 # Address sanitizer clang config
 ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan_$(TARGET_ARCH)_android
 ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address -fno-omit-frame-pointer
 ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
-ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl $(ADDRESS_SANITIZER_RUNTIME_LIBRARY)
-ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
+
+ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS_HOST := -rdynamic
+ADDRESS_SANITIZER_CONFIG_EXTRA_LDLIBS_HOST := -lpthread -ldl
+ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES_HOST :=
+ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES_HOST := libasan
+
+ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS_TARGET :=
+ADDRESS_SANITIZER_CONFIG_EXTRA_LDLIBS_TARGET :=
+ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES_TARGET := libdl $(ADDRESS_SANITIZER_RUNTIME_LIBRARY)
+ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES_TARGET := libasan
 
 # This allows us to use the superset of functionality that compiler-rt
 # provides to Clang (for supporting features like -ftrapv).
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index f23c4a6..8ee7734 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -46,11 +46,15 @@
 LOCAL_ASFLAGS:=
 LOCAL_CFLAGS:=
 LOCAL_CPPFLAGS:=
+LOCAL_CLANG_ASFLAGS:=
+LOCAL_CLANG_CFLAGS:=
+LOCAL_CLANG_CPPFLAGS:=
 LOCAL_CONLYFLAGS:=
 LOCAL_RTTI_FLAG:=
 LOCAL_C_INCLUDES:=
 LOCAL_EXPORT_C_INCLUDE_DIRS:=
 LOCAL_LDFLAGS:=
+LOCAL_CLANG_LDFLAGS:=
 LOCAL_LDLIBS:=
 LOCAL_AAPT_FLAGS:=
 LOCAL_AAPT_INCLUDE_ALL_RESOURCES:=
@@ -123,6 +127,7 @@
 LOCAL_RENDERSCRIPT_TARGET_API:=
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
 LOCAL_DEX_PREOPT_IMAGE_LOCATION:=
+LOCAL_DEX_PREOPT_FLAGS:=
 LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
 LOCAL_PROTOC_FLAGS:=
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS:=
@@ -144,6 +149,7 @@
 LOCAL_DONT_DELETE_JAR_META_INF:=
 LOCAL_ADDITIONAL_CERTIFICATES:=
 LOCAL_PREBUILT_MODULE_FILE:=
+LOCAL_POST_LINK_CMD:=
 LOCAL_POST_INSTALL_CMD:=
 LOCAL_DIST_BUNDLED_BINARIES:=
 LOCAL_HAL_STATIC_LIBRARIES:=
@@ -157,15 +163,22 @@
 LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH:=
 LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH_WARN:=
 LOCAL_MODULE_HOST_ARCH:=
+LOCAL_NO_FPIE :=
+LOCAL_CXX_STL := default
+LOCAL_NATIVE_COVERAGE :=
 
 # arch specific variables
 LOCAL_SRC_FILES_$(TARGET_ARCH):=
 LOCAL_CFLAGS_$(TARGET_ARCH):=
+LOCAL_CLANG_CFLAGS_$(TARGET_ARCH):=
 LOCAL_CPPFLAGS_$(TARGET_ARCH):=
+LOCAL_CLANG_CPPFLAGS_$(TARGET_ARCH):=
 LOCAL_C_INCLUDES_$(TARGET_ARCH):=
 LOCAL_ASFLAGS_$(TARGET_ARCH):=
+LOCAL_CLANG_ASFLAGS_$(TARGET_ARCH):=
 LOCAL_NO_CRT_$(TARGET_ARCH):=
 LOCAL_LDFLAGS_$(TARGET_ARCH):=
+LOCAL_CLANG_LDFLAGS_$(TARGET_ARCH):=
 LOCAL_SHARED_LIBRARIES_$(TARGET_ARCH):=
 LOCAL_STATIC_LIBRARIES_$(TARGET_ARCH):=
 LOCAL_WHOLE_STATIC_LIBRARIES_$(TARGET_ARCH):=
@@ -176,11 +189,15 @@
 ifdef TARGET_2ND_ARCH
 LOCAL_SRC_FILES_$(TARGET_2ND_ARCH):=
 LOCAL_CFLAGS_$(TARGET_2ND_ARCH):=
+LOCAL_CLANG_CFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_CPPFLAGS_$(TARGET_2ND_ARCH):=
+LOCAL_CLANG_CPPFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_C_INCLUDES_$(TARGET_2ND_ARCH):=
 LOCAL_ASFLAGS_$(TARGET_2ND_ARCH):=
+LOCAL_CLANG_ASFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_NO_CRT_$(TARGET_2ND_ARCH):=
 LOCAL_LDFLAGS_$(TARGET_2ND_ARCH):=
+LOCAL_CLANG_LDFLAGS_$(TARGET_2ND_ARCH):=
 LOCAL_SHARED_LIBRARIES_$(TARGET_2ND_ARCH):=
 LOCAL_STATIC_LIBRARIES_$(TARGET_2ND_ARCH):=
 LOCAL_WHOLE_STATIC_LIBRARIES_$(TARGET_2ND_ARCH):=
@@ -191,11 +208,15 @@
 endif
 LOCAL_SRC_FILES_$(HOST_ARCH):=
 LOCAL_CFLAGS_$(HOST_ARCH):=
+LOCAL_CLANG_CFLAGS_$(HOST_ARCH):=
 LOCAL_CPPFLAGS_$(HOST_ARCH):=
+LOCAL_CLANG_CPPFLAGS_$(HOST_ARCH):=
 LOCAL_C_INCLUDES_$(HOST_ARCH):=
 LOCAL_ASFLAGS_$(HOST_ARCH):=
+LOCAL_CLANG_ASFLAGS_$(HOST_ARCH):=
 LOCAL_NO_CRT_$(HOST_ARCH):=
 LOCAL_LDFLAGS_$(HOST_ARCH):=
+LOCAL_CLANG_LDFLAGS_$(HOST_ARCH):=
 LOCAL_SHARED_LIBRARIES_$(HOST_ARCH):=
 LOCAL_STATIC_LIBRARIES_$(HOST_ARCH):=
 LOCAL_WHOLE_STATIC_LIBRARIES_$(HOST_ARCH):=
@@ -205,11 +226,15 @@
 ifdef HOST_2ND_ARCH
 LOCAL_SRC_FILES_$(HOST_2ND_ARCH):=
 LOCAL_CFLAGS_$(HOST_2ND_ARCH):=
+LOCAL_CLANG_CFLAGS_$(HOST_2ND_ARCH):=
 LOCAL_CPPFLAGS_$(HOST_2ND_ARCH):=
+LOCAL_CLANG_CPPFLAGS_$(HOST_2ND_ARCH):=
 LOCAL_C_INCLUDES_$(HOST_2ND_ARCH):=
 LOCAL_ASFLAGS_$(HOST_2ND_ARCH):=
+LOCAL_CLANG_ASFLAGS_$(HOST_2ND_ARCH):=
 LOCAL_NO_CRT_$(HOST_2ND_ARCH):=
 LOCAL_LDFLAGS_$(HOST_2ND_ARCH):=
+LOCAL_CLANG_LDFLAGS_$(HOST_2ND_ARCH):=
 LOCAL_SHARED_LIBRARIES_$(HOST_2ND_ARCH):=
 LOCAL_STATIC_LIBRARIES_$(HOST_2ND_ARCH):=
 LOCAL_WHOLE_STATIC_LIBRARIES_$(HOST_2ND_ARCH):=
@@ -236,6 +261,14 @@
 LOCAL_LDFLAGS_64:=
 LOCAL_ASFLAGS_32:=
 LOCAL_ASFLAGS_64:=
+LOCAL_CLANG_CFLAGS_32:=
+LOCAL_CLANG_CFLAGS_64:=
+LOCAL_CLANG_CPPFLAGS_32:=
+LOCAL_CLANG_CPPFLAGS_64:=
+LOCAL_CLANG_LDFLAGS_32:=
+LOCAL_CLANG_LDFLAGS_64:=
+LOCAL_CLANG_ASFLAGS_32:=
+LOCAL_CLANG_ASFLAGS_64:=
 LOCAL_C_INCLUDES_32:=
 LOCAL_C_INCLUDES_64:=
 LOCAL_MODULE_PATH_32:=
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index ec37993..7ea0099 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -33,19 +33,8 @@
 
 $(combo_2nd_arch_prefix)HOST_TOOLCHAIN_ROOT := prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1
 $(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_ROOT)/bin/i686-apple-darwin$(gcc_darwin_version)
-# Don't do anything if the toolchain is not there
-ifneq (,$(strip $(wildcard $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)-gcc)))
 $(combo_2nd_arch_prefix)HOST_CC  := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)-gcc
 $(combo_2nd_arch_prefix)HOST_CXX := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)-g++
-ifneq ($(filter 10.8 10.9, $(mac_sdk_version)),)
-# Mac SDK 10.8+ no longer has stdarg.h, etc
-host_toolchain_header := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_ROOT)/lib/gcc/i686-apple-darwin$(gcc_darwin_version)/4.2.1/include
-$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -isystem $(host_toolchain_header)
-endif
-else
-$(combo_2nd_arch_prefix)HOST_CC := gcc
-$(combo_2nd_arch_prefix)HOST_CXX := g++
-endif # $(HOST_TOOLCHAIN_PREFIX)-gcc exists
 
 # gcc location for clang; to be updated when clang is updated
 # HOST_TOOLCHAIN_ROOT is a Darwin-specific define
diff --git a/core/combo/HOST_darwin-x86_64.mk b/core/combo/HOST_darwin-x86_64.mk
index a776a69..ae06d59 100644
--- a/core/combo/HOST_darwin-x86_64.mk
+++ b/core/combo/HOST_darwin-x86_64.mk
@@ -33,19 +33,8 @@
 
 HOST_TOOLCHAIN_ROOT := prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1
 HOST_TOOLCHAIN_PREFIX := $(HOST_TOOLCHAIN_ROOT)/bin/i686-apple-darwin$(gcc_darwin_version)
-# Don't do anything if the toolchain is not there
-ifneq (,$(strip $(wildcard $(HOST_TOOLCHAIN_PREFIX)-gcc)))
 HOST_CC  := $(HOST_TOOLCHAIN_PREFIX)-gcc
 HOST_CXX := $(HOST_TOOLCHAIN_PREFIX)-g++
-ifneq ($(filter 10.8 10.9, $(mac_sdk_version)),)
-# Mac SDK 10.8+ no longer has stdarg.h, etc
-host_toolchain_header := $(HOST_TOOLCHAIN_ROOT)/lib/gcc/i686-apple-darwin$(gcc_darwin_version)/4.2.1/include
-HOST_GLOBAL_CFLAGS += -isystem $(host_toolchain_header)
-endif
-else
-HOST_CC := gcc
-HOST_CXX := g++
-endif # $(HOST_TOOLCHAIN_PREFIX)-gcc exists
 
 # gcc location for clang; to be updated when clang is updated
 # HOST_TOOLCHAIN_ROOT is a Darwin-specific define
diff --git a/core/combo/HOST_linux-x86.mk b/core/combo/HOST_linux-x86.mk
index 3ca7443..09cf271 100644
--- a/core/combo/HOST_linux-x86.mk
+++ b/core/combo/HOST_linux-x86.mk
@@ -18,20 +18,17 @@
 # Included by combo/select.mk
 
 ifeq ($(strip $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)),)
-$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/bin/x86_64-linux-
+$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/bin/x86_64-linux-
 endif
-# Don't do anything if the toolchain is not there
-ifneq (,$(strip $(wildcard $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)gcc)))
 $(combo_2nd_arch_prefix)HOST_CC  := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)gcc
 $(combo_2nd_arch_prefix)HOST_CXX := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)g++
 $(combo_2nd_arch_prefix)HOST_AR  := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)ar
-endif # $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)gcc exists
 
 # gcc location for clang; to be updated when clang is updated
-$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/
+$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/
 
 # We expect SSE3 floating point math.
-$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 -Wa,--noexecstack -march=prescott
+$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -msse3 -mfpmath=sse -m32 -Wa,--noexecstack -march=prescott
 $(combo_2nd_arch_prefix)HOST_GLOBAL_LDFLAGS += -m32 -Wl,-z,noexecstack
 
 ifneq ($(strip $(BUILD_HOST_static)),)
diff --git a/core/combo/HOST_linux-x86_64.mk b/core/combo/HOST_linux-x86_64.mk
index 53a3ae8..86877b3 100644
--- a/core/combo/HOST_linux-x86_64.mk
+++ b/core/combo/HOST_linux-x86_64.mk
@@ -18,17 +18,14 @@
 # Included by combo/select.mk
 
 ifeq ($(strip $(HOST_TOOLCHAIN_PREFIX)),)
-HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/bin/x86_64-linux-
+HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/bin/x86_64-linux-
 endif
-# Don't do anything if the toolchain is not there
-ifneq (,$(strip $(wildcard $(HOST_TOOLCHAIN_PREFIX)gcc)))
 HOST_CC  := $(HOST_TOOLCHAIN_PREFIX)gcc
 HOST_CXX := $(HOST_TOOLCHAIN_PREFIX)g++
 HOST_AR  := $(HOST_TOOLCHAIN_PREFIX)ar
-endif # $(HOST_TOOLCHAIN_PREFIX)gcc exists
 
 # gcc location for clang; to be updated when clang is updated
-HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/
+HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/
 
 HOST_GLOBAL_CFLAGS += -m64 -Wa,--noexecstack
 HOST_GLOBAL_LDFLAGS += -m64 -Wl,-z,noexecstack
diff --git a/core/combo/HOST_windows-x86.mk b/core/combo/HOST_windows-x86.mk
index fdb72a7..d4acfe9 100644
--- a/core/combo/HOST_windows-x86.mk
+++ b/core/combo/HOST_windows-x86.mk
@@ -24,7 +24,7 @@
 
 # Settings to use MinGW has a cross-compiler under Linux
 ifneq ($(findstring Linux,$(UNAME)),)
-ifneq ($(strip $(USE_MINGW)),)
+ifdef USE_MINGW
 HOST_ACP_UNAVAILABLE := true
 TOOLS_EXE_SUFFIX :=
 $(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -DUSE_MINGW
diff --git a/core/combo/HOST_windows-x86_64.mk b/core/combo/HOST_windows-x86_64.mk
index c77d82c..bd392ea 100644
--- a/core/combo/HOST_windows-x86_64.mk
+++ b/core/combo/HOST_windows-x86_64.mk
@@ -24,7 +24,7 @@
 
 # Settings to use MinGW has a cross-compiler under Linux
 ifneq ($(findstring Linux,$(UNAME)),)
-ifneq ($(strip $(USE_MINGW)),)
+ifdef USE_MINGW
 HOST_ACP_UNAVAILABLE := true
 TOOLS_EXE_SUFFIX :=
 HOST_GLOBAL_CFLAGS += -DUSE_MINGW
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index df81cd5..9472306 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -153,7 +153,6 @@
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 
 
 ## on some hosts, the target cross-compiler is not available so do not run this command
@@ -165,6 +164,8 @@
         $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
 $(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \
         $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a)
+$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \
+        $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libgcov.a)
 endif
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
@@ -174,7 +175,6 @@
 $(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-arm/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/arm \
@@ -188,7 +188,7 @@
 
 $(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
 
 $(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
 
@@ -212,6 +212,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
 	$(PRIVATE_LDLIBS)
@@ -238,6 +239,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -255,11 +257,13 @@
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
-	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 07d3984..7c44366 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -126,12 +126,13 @@
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 
 TARGET_LIBGCC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
 	-print-libgcc-file-name)
 TARGET_LIBATOMIC := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
 	-print-file-name=libatomic.a)
+TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
+	-print-file-name=libgcov.a)
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
 KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-$(TARGET_ARCH)
@@ -140,7 +141,6 @@
 TARGET_C_INCLUDES := \
 	$(libc_root)/arch-arm64/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/arm64 \
@@ -154,7 +154,7 @@
 
 TARGET_STRIP_MODULE:=true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
 
 TARGET_CUSTOM_LD_COMMAND := true
 
@@ -178,6 +178,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
 	$(PRIVATE_LDLIBS)
@@ -204,6 +205,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -221,11 +223,13 @@
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
-	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index 995e63c..5963727 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -121,7 +121,6 @@
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 
 
 ## on some hosts, the target cross-compiler is not available so do not run this command
@@ -137,6 +136,8 @@
 ifneq ($(LIBGCC_EH),libgcc_eh.a)
   $(combo_2nd_arch_prefix)TARGET_LIBGCC += $(LIBGCC_EH)
 endif
+$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
+        --print-file-name=libgcov.a)
 endif
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
@@ -146,7 +147,6 @@
 $(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-mips/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/mips \
@@ -160,7 +160,7 @@
 
 $(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
 
 $(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
 
@@ -184,6 +184,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
 	$(PRIVATE_LDLIBS)
@@ -210,6 +211,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -227,11 +229,13 @@
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
-	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
diff --git a/core/combo/TARGET_linux-mips64.mk b/core/combo/TARGET_linux-mips64.mk
index 4511b47..aef6759 100644
--- a/core/combo/TARGET_linux-mips64.mk
+++ b/core/combo/TARGET_linux-mips64.mk
@@ -121,7 +121,6 @@
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 libthread_db_root := bionic/libthread_db
 
 
@@ -138,6 +137,8 @@
 ifneq ($(LIBGCC_EH),libgcc_eh.a)
   TARGET_LIBGCC += $(LIBGCC_EH)
 endif
+TARGET_LIBGCOV := $(shell $(TARGET_CC) $(TARGET_GLOBAL_CFLAGS) \
+        --print-file-name=libgcov.a)
 endif
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
@@ -148,7 +149,6 @@
 TARGET_C_INCLUDES := \
 	$(libc_root)/arch-mips64/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/mips \
@@ -188,6 +188,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
 	$(PRIVATE_LDLIBS)
@@ -214,6 +215,7 @@
 	$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -231,11 +233,13 @@
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
-	$(call normalize-target-libraries,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES)))) \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	-Wl,--start-group \
 	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 0af3948..2c29815 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -62,13 +62,14 @@
 	$(shell $($(combo_2nd_arch_prefix)TARGET_CC) -m32 -print-file-name=libgcc.a)
 $(combo_2nd_arch_prefix)TARGET_LIBATOMIC := \
 	$(shell $($(combo_2nd_arch_prefix)TARGET_CC) -m32 -print-file-name=libatomic.a)
+$(combo_2nd_arch_prefix)TARGET_LIBGCOV := \
+	$(shell $($(combo_2nd_arch_prefix)TARGET_CC) -m32 -print-file-name=libgcov.a)
 endif
 
 $(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
 KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-x86 # x86 covers both x86 and x86_64.
@@ -128,7 +129,6 @@
 $(combo_2nd_arch_prefix)TARGET_C_INCLUDES := \
 	$(libc_root)/arch-x86/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/i387 \
@@ -142,7 +142,7 @@
 
 $(combo_2nd_arch_prefix)TARGET_STRIP_MODULE:=true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
 
 $(combo_2nd_arch_prefix)TARGET_CUSTOM_LD_COMMAND := true
 define $(combo_2nd_arch_prefix)transform-o-to-shared-lib-inner
@@ -164,6 +164,7 @@
 	-o $@ \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
 	$(PRIVATE_LDLIBS)
@@ -190,6 +191,7 @@
 	-o $@ \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -208,8 +210,12 @@
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
 	-Wl,--start-group \
-	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
+	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 33d6a56..27e802f 100644
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -62,13 +62,14 @@
 	$(shell $(TARGET_CC) -m64 -print-file-name=libgcc.a)
 TARGET_LIBATOMIC := \
 	$(shell $(TARGET_CC) -m64 -print-file-name=libatomic.a)
+TARGET_LIBGCOV := \
+	$(shell $(TARGET_CC) -m64 -print-file-name=libgcov.a)
 endif
 
 TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
 
 libc_root := bionic/libc
 libm_root := bionic/libm
-libstdc++_root := bionic/libstdc++
 
 KERNEL_HEADERS_COMMON := $(libc_root)/kernel/uapi
 KERNEL_HEADERS_ARCH   := $(libc_root)/kernel/uapi/asm-x86 # x86 covers both x86 and x86_64.
@@ -133,7 +134,6 @@
 TARGET_C_INCLUDES := \
 	$(libc_root)/arch-x86_64/include \
 	$(libc_root)/include \
-	$(libstdc++_root)/include \
 	$(KERNEL_HEADERS) \
 	$(libm_root)/include \
 	$(libm_root)/include/amd64 \
@@ -147,7 +147,7 @@
 
 TARGET_STRIP_MODULE:=true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
 
 TARGET_CUSTOM_LD_COMMAND := true
 define transform-o-to-shared-lib-inner
@@ -169,6 +169,7 @@
 	-o $@ \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O))
 endef
@@ -194,6 +195,7 @@
 	-o $@ \
 	$(PRIVATE_LDFLAGS) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
 	$(PRIVATE_LDLIBS)
@@ -211,9 +213,13 @@
 	-Wl,--whole-archive \
 	$(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
 	-Wl,--no-whole-archive \
+	$(call normalize-target-libraries,$(filter-out %libcompiler_rt.a,$(filter-out %libc_nomalloc.a,$(filter-out %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))))) \
 	-Wl,--start-group \
-	$(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
+	$(call normalize-target-libraries,$(filter %libc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
+	$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(PRIVATE_TARGET_LIBATOMIC) \
+	$(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
+	$(call normalize-target-libraries,$(filter %libcompiler_rt.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
 	$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
 	-Wl,--end-group \
 	$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
diff --git a/core/combo/arch/arm/armv7-a-neon.mk b/core/combo/arch/arm/armv7-a-neon.mk
index c6603db..3f4c391 100644
--- a/core/combo/arch/arm/armv7-a-neon.mk
+++ b/core/combo/arch/arm/armv7-a-neon.mk
@@ -7,7 +7,14 @@
 ARCH_ARM_HAVE_NEON              := true
 
 ifneq (,$(filter cortex-a15 krait denver,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))
+	# TODO: krait is not a cortex-a15, we set the variant to cortex-a15 so that
+	#       hardware divide operations are generated. This should be removed and a
+	#       krait CPU variant added to GCC/clang.
 	arch_variant_cflags := -mcpu=cortex-a15
+
+	# Fake an ARM compiler flag as these processors support LPAE which GCC/clang
+	# don't advertise.
+	arch_variant_cflags += -D__ARM_FEATURE_LPAE=1
 else
 ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)),cortex-a8)
 	arch_variant_cflags := -mcpu=cortex-a8
diff --git a/core/combo/arch/x86/haswell.mk b/core/combo/arch/x86/haswell.mk
index a00e0a6..b3922c0 100644
--- a/core/combo/arch/x86/haswell.mk
+++ b/core/combo/arch/x86/haswell.mk
@@ -7,10 +7,11 @@
 ARCH_X86_HAVE_SSE4_2 := true
 ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := true
 
 # CFLAGS for this arch
 arch_variant_cflags := \
 	-march=core-avx2 \
-	-mstackrealign \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86/ivybridge.mk b/core/combo/arch/x86/ivybridge.mk
index 02dc1e0..c9fc33b 100644
--- a/core/combo/arch/x86/ivybridge.mk
+++ b/core/combo/arch/x86/ivybridge.mk
@@ -7,10 +7,11 @@
 ARCH_X86_HAVE_SSE4_2 := true
 ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
 	-march=core-avx-i \
-	-mstackrealign \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86/sandybridge.mk b/core/combo/arch/x86/sandybridge.mk
index dfa540c..bca5953 100644
--- a/core/combo/arch/x86/sandybridge.mk
+++ b/core/combo/arch/x86/sandybridge.mk
@@ -2,13 +2,16 @@
 # Generating binaries for SandyBridge processors.
 #
 ARCH_X86_HAVE_SSSE3  := true
+ARCH_X86_HAVE_SSE4   := true
 ARCH_X86_HAVE_SSE4_1 := true
 ARCH_X86_HAVE_SSE4_2 := true
+ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
 	-march=corei7-avx \
-	-mstackrealign \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86/silvermont.mk b/core/combo/arch/x86/silvermont.mk
index 3a8718d..d064b1d 100644
--- a/core/combo/arch/x86/silvermont.mk
+++ b/core/combo/arch/x86/silvermont.mk
@@ -15,6 +15,5 @@
 # CFLAGS for this arch
 arch_variant_cflags := \
 	-march=slm \
-	-mstackrealign \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86/x86-atom.mk b/core/combo/arch/x86/x86-atom.mk
index 508a0af..3800350 100644
--- a/core/combo/arch/x86/x86-atom.mk
+++ b/core/combo/arch/x86/x86-atom.mk
@@ -11,6 +11,5 @@
 # CFLAGS for this arch
 arch_variant_cflags := \
 	-march=atom \
-	-mstackrealign \
 	-mfpmath=sse \
 
diff --git a/core/combo/arch/x86_64/haswell.mk b/core/combo/arch/x86_64/haswell.mk
index 9cf95b3..6067eee 100644
--- a/core/combo/arch/x86_64/haswell.mk
+++ b/core/combo/arch/x86_64/haswell.mk
@@ -7,6 +7,8 @@
 ARCH_X86_HAVE_SSE4_2 := true
 ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := true
 
 # CFLAGS for this arch
 arch_variant_cflags := \
diff --git a/core/combo/arch/x86_64/ivybridge.mk b/core/combo/arch/x86_64/ivybridge.mk
index 7b95190..90e23a9 100644
--- a/core/combo/arch/x86_64/ivybridge.mk
+++ b/core/combo/arch/x86_64/ivybridge.mk
@@ -7,6 +7,8 @@
 ARCH_X86_HAVE_SSE4_2 := true
 ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
diff --git a/core/combo/arch/x86_64/sandybridge.mk b/core/combo/arch/x86_64/sandybridge.mk
index a443b6b..865548c 100644
--- a/core/combo/arch/x86_64/sandybridge.mk
+++ b/core/combo/arch/x86_64/sandybridge.mk
@@ -2,9 +2,13 @@
 # Generating binaries for SandyBridge processors.
 #
 ARCH_X86_HAVE_SSSE3  := true
+ARCH_X86_HAVE_SSE4   := true
 ARCH_X86_HAVE_SSE4_1 := true
 ARCH_X86_HAVE_SSE4_2 := true
+ARCH_X86_HAVE_AES_NI := true
 ARCH_X86_HAVE_AVX    := true
+ARCH_X86_HAVE_POPCNT := true
+ARCH_X86_HAVE_MOVBE  := false
 
 # CFLAGS for this arch
 arch_variant_cflags := \
diff --git a/core/combo/arch/x86_64/x86_64-atom.mk b/core/combo/arch/x86_64/x86_64-atom.mk
deleted file mode 100755
index 64b07a0..0000000
--- a/core/combo/arch/x86_64/x86_64-atom.mk
+++ /dev/null
@@ -1,13 +0,0 @@
-# This file contains feature macro definitions specific to the
-# 'x86_64-atom' arch variant. This is an extension of the 'x86_64' base variant
-# that adds Atom-specific features.
-#
-# See build/core/combo/arch/x86_64/x86_64.mk for differences.
-#
-ARCH_X86_HAVE_SSSE3 := true
-ARCH_X86_HAVE_MOVBE := true
-ARCH_X86_HAVE_POPCNT := false   # popcnt is not supported by current Atom CPUs
-
-# CFLAGS for this arch
-arch_variant_cflags := \
-	-march=atom
diff --git a/core/combo/include/arch/darwin-x86/AndroidConfig.h b/core/combo/include/arch/darwin-x86/AndroidConfig.h
index 54f3750..eb5609c 100644
--- a/core/combo/include/arch/darwin-x86/AndroidConfig.h
+++ b/core/combo/include/arch/darwin-x86/AndroidConfig.h
@@ -42,12 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have the futex syscall?
- */
-
-/* #define HAVE_FUTEX */
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -56,16 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_MACOSX_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -79,11 +63,6 @@
 #define  HAVE_TERMIO_H
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-/* #define  HAVE_SYS_SENDFILE_H 1 */
-
-/*
  * Define this if you build against MSVCRT.DLL
  */
 /* #define HAVE_MS_C_RUNTIME */
@@ -105,26 +84,6 @@
 #define HAVE_LOCALTIME_R 1
 
 /*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-/* #define HAVE_IOCTL */
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
- * Define this if have clock_gettime() and friends
- */
-/* #define HAVE_POSIX_CLOCKS */
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -146,11 +105,6 @@
 #define _LARGEFILE_SOURCE 1
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-/* #define HAVE_OFF64_T */
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -158,18 +112,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-/* #define HAVE_GETTID */
-
-
-/*
  * Add any extra platform-specific defines here.
  */
 #define _THREAD_SAFE
@@ -214,11 +156,6 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.dylib"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -241,11 +178,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
@@ -285,14 +217,4 @@
  */
 #define HAVE_PRINTF_ZD 1
 
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 1
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
 #endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/linux-arm/AndroidConfig.h b/core/combo/include/arch/linux-arm/AndroidConfig.h
index c06c8bc..4a9ec62 100644
--- a/core/combo/include/arch/linux-arm/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm/AndroidConfig.h
@@ -42,19 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have pthread_setname_np()?
- *
- * (HAVE_PTHREAD_SETNAME_NP is used by WebKit to enable a function with
- * the same name but different parameters, so we can't use that here.)
- */
-#define HAVE_ANDROID_PTHREAD_SETNAME_NP
-
-/*
- * Do we have the futex syscall?
- */
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -63,16 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_ANDROID_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -86,11 +63,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
  * Define this if you build against MSVCRT.DLL
  */
 /* #define HAVE_MS_C_RUNTIME */
@@ -107,36 +79,11 @@
 #define HAVE_SYMLINKS
 
 /*
- * Define this if we have localtime_r().
- */
-/* #define HAVE_LOCALTIME_R 1 */
-
-/*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
  * Define this if have clock_gettime() and friends
  */
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -147,36 +94,12 @@
 #define HAVE_LITTLE_ENDIAN
 
 /*
- * We need to choose between 32-bit and 64-bit off_t.  All of our code should
- * agree on the same size.  For desktop systems, use 64-bit values,
- * because some of our libraries (e.g. wxWidgets) expect to be built that way.
- */
-/* #define _FILE_OFFSET_BITS 64 */
-/* #define _LARGEFILE_SOURCE 1 */
-
-/*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
  */
 #define HAVE_BACKTRACE 0
 
-/*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-#define HAVE_GETTID
-
 /* 
  * Defined if we have the sched_setscheduler() call
  */
@@ -230,32 +153,16 @@
 #define HAVE_LIBC_SYSTEM_PROPERTIES 1
 
 /*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-/* #define HAVE_SYSTEM_PROPERTY_SERVER */
-
-/*
  * What CPU architecture does this platform use?
  */
 #define ARCH_ARM
 
 /*
- * Define if the size of enums is as short as possible,
- */
-/* #define HAVE_SHORT_ENUMS */
-
-/*
  * sprintf() format string for shared library naming.
  */
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -276,11 +183,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
@@ -325,14 +227,4 @@
  */
 #define HAVE_PRINTF_ZD 1
 
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-arm64/AndroidConfig.h b/core/combo/include/arch/linux-arm64/AndroidConfig.h
index bcbda8f..c3ad5da 100644
--- a/core/combo/include/arch/linux-arm64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm64/AndroidConfig.h
@@ -42,19 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have pthread_setname_np()?
- *
- * (HAVE_PTHREAD_SETNAME_NP is used by WebKit to enable a function with
- * the same name but different parameters, so we can't use that here.)
- */
-#define HAVE_ANDROID_PTHREAD_SETNAME_NP
-
-/*
- * Do we have the futex syscall?
- */
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -63,23 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * Process out-of-memory adjustment.  Set if running on Linux,
- * where we can write to /proc/<pid>/oom_adj to modify the out-of-memory
- * badness adjustment.
- */
-#define HAVE_OOM_ADJ
-
-/*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_ANDROID_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -93,16 +63,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
- * Define this if you build against MSVCRT.DLL
- */
-/* #define HAVE_MS_C_RUNTIME */
-
-/*
  * Define this if you have sys/uio.h
  */
 #define  HAVE_SYS_UIO_H 1
@@ -114,36 +74,11 @@
 #define HAVE_SYMLINKS
 
 /*
- * Define this if we have localtime_r().
- */
-/* #define HAVE_LOCALTIME_R 1 */
-
-/*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
  * Define this if have clock_gettime() and friends
  */
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -157,11 +92,6 @@
 /* #define _LARGEFILE_SOURCE 1 */
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -169,17 +99,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-#define HAVE_GETTID
-
-/*
  * Defined if we have the sched_setscheduler() call
  */
 #define HAVE_SCHED_SETSCHEDULER
@@ -232,32 +151,16 @@
 #define HAVE_LIBC_SYSTEM_PROPERTIES 1
 
 /*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-/* #define HAVE_SYSTEM_PROPERTY_SERVER */
-
-/*
  * What CPU architecture does this platform use?
  */
 #define ARCH_AARCH64
 
 /*
- * Define if the size of enums is as short as possible,
- */
-/* #define HAVE_SHORT_ENUMS */
-
-/*
  * sprintf() format string for shared library naming.
  */
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -278,11 +181,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
@@ -327,14 +225,4 @@
  */
 #define HAVE_PRINTF_ZD 1
 
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-mips/AndroidConfig.h b/core/combo/include/arch/linux-mips/AndroidConfig.h
index bb3dc95..45bff09 100644
--- a/core/combo/include/arch/linux-mips/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips/AndroidConfig.h
@@ -42,19 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have pthread_setname_np()?
- *
- * (HAVE_PTHREAD_SETNAME_NP is used by WebKit to enable a function with
- * the same name but different parameters, so we can't use that here.)
- */
-#define HAVE_ANDROID_PTHREAD_SETNAME_NP
-
-/*
- * Do we have the futex syscall?
- */
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -63,16 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_ANDROID_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -86,11 +63,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
  * Define this if you build against MSVCRT.DLL
  */
 /* #define HAVE_MS_C_RUNTIME */
@@ -117,11 +89,6 @@
 /* #define HAVE_GETHOSTBYNAME_R */
 
 /*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
  * Define this if we want to use WinSock.
  */
 /* #define HAVE_WINSOCK */
@@ -132,11 +99,6 @@
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -160,11 +122,6 @@
 /* #define _LARGEFILE_SOURCE 1 */
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -172,17 +129,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-#define HAVE_GETTID
-
-/*
  * Defined if we have the sched_setscheduler() call
  */
 #define HAVE_SCHED_SETSCHEDULER
@@ -268,11 +214,6 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -293,11 +234,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
diff --git a/core/combo/include/arch/linux-mips64/AndroidConfig.h b/core/combo/include/arch/linux-mips64/AndroidConfig.h
index 7ded3ce..f66830a 100644
--- a/core/combo/include/arch/linux-mips64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips64/AndroidConfig.h
@@ -42,19 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have pthread_setname_np()?
- *
- * (HAVE_PTHREAD_SETNAME_NP is used by WebKit to enable a function with
- * the same name but different parameters, so we can't use that here.)
- */
-#define HAVE_ANDROID_PTHREAD_SETNAME_NP
-
-/*
- * Do we have the futex syscall?
- */
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -63,23 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * Process out-of-memory adjustment.  Set if running on Linux,
- * where we can write to /proc/<pid>/oom_adj to modify the out-of-memory
- * badness adjustment.
- */
-#define HAVE_OOM_ADJ
-
-/*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_ANDROID_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -93,11 +63,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
  * Define this if you build against MSVCRT.DLL
  */
 /* #define HAVE_MS_C_RUNTIME */
@@ -124,11 +89,6 @@
 /* #define HAVE_GETHOSTBYNAME_R */
 
 /*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
  * Define this if we want to use WinSock.
  */
 /* #define HAVE_WINSOCK */
@@ -139,11 +99,6 @@
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -157,11 +112,6 @@
 /* #define _LARGEFILE_SOURCE 1 */
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -169,17 +119,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-#define HAVE_GETTID
-
-/*
  * Defined if we have the sched_setscheduler() call
  */
 #define HAVE_SCHED_SETSCHEDULER
@@ -265,11 +204,6 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -290,11 +224,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
diff --git a/core/combo/include/arch/linux-x86/AndroidConfig.h b/core/combo/include/arch/linux-x86/AndroidConfig.h
index 5523e49..e3bffec 100644
--- a/core/combo/include/arch/linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/linux-x86/AndroidConfig.h
@@ -42,12 +42,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have the futex syscall?
- */
-
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -56,16 +50,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_SYSV_IPC
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -79,16 +63,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
- * Define this if you build against MSVCRT.DLL
- */
-/* #define HAVE_MS_C_RUNTIME */
-
-/*
  * Define this if you have sys/uio.h
  */
 #define  HAVE_SYS_UIO_H 1
@@ -110,26 +84,11 @@
 #define HAVE_GETHOSTBYNAME_R
 
 /*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
  * Define this if have clock_gettime() and friends
  */
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -148,57 +107,27 @@
 #define _LARGEFILE_SOURCE 1
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
  */
 #define HAVE_BACKTRACE 1
 
-/*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-/* #define HAVE_GETTID */
-
 /* 
  * Defined if we have the sched_setscheduler() call
  */
 #define HAVE_SCHED_SETSCHEDULER
 
 /*
- * Add any extra platform-specific defines here.
- */
-
-/*
  * Define if we have <malloc.h> header
  */
 #define HAVE_MALLOC_H
 
 /*
- * Define if we have Linux-style non-filesystem Unix Domain Sockets
- */
-
-/*
  * What CPU architecture does this platform use?
  */
 #define ARCH_X86
 
-
-/*
- * Define if we have Linux's inotify in <sys/inotify.h>.
- */
-/*#define HAVE_INOTIFY 1*/
-
 /*
  * Define if we have madvise() in <sys/mman.h>
  */
@@ -215,11 +144,6 @@
 #define HAVE_DIRENT_D_TYPE 1
 
 /*
- * Define if libc includes Android system properties implementation.
- */
-/* #define HAVE_LIBC_SYSTEM_PROPERTIES */
-
-/*
  * Define if system provides a system property server (should be
  * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
  */
@@ -231,11 +155,6 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -251,21 +170,6 @@
 #define HAVE_SYS_SOCKET_H 1
 
 /*
- * Define if the strlcpy() function exists on the system.
- */
-/* #define HAVE_STRLCPY 1 */
-
-/*
- * Define if the open_memstream() function exists on the system.
- */
-#define HAVE_OPEN_MEMSTREAM 1
-
-/*
- * Define if the BSD funopen() function exists on the system.
- */
-/* #define HAVE_FUNOPEN 1 */
-
-/*
  * Define if prctl() exists
  */
 #define HAVE_PRCTL 1
@@ -305,18 +209,4 @@
  */
 #define HAVE_PRINTF_ZD 1
 
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8)
-#define HAVE_GNU_QSORT_R 1
-#else
-#define HAVE_GNU_QSORT_R 0
-#endif
-
 #endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/target_linux-x86/AndroidConfig.h b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
index c267b2b..216bb9ed 100644
--- a/core/combo/include/arch/target_linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
@@ -28,19 +28,6 @@
 #define HAVE_PTHREADS
 
 /*
- * Do we have pthread_setname_np()?
- *
- * (HAVE_PTHREAD_SETNAME_NP is used by WebKit to enable a function with
- * the same name but different parameters, so we can't use that here.)
- */
-#define HAVE_ANDROID_PTHREAD_SETNAME_NP
-
-/*
- * Do we have the futex syscall?
- */
-#define HAVE_FUTEX
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -49,16 +36,6 @@
 #define HAVE_FORKEXEC
 
 /*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
-#define HAVE_ANDROID_IPC 1
-
-/*
  * Memory-mapping model. Choose one:
  *
  * HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
@@ -72,16 +49,6 @@
 #define  HAVE_TERMIO_H 1
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#define  HAVE_SYS_SENDFILE_H 1
-
-/*
- * Define this if you build against have Microsoft C runtime (MSVCRT.DLL)
- */
-/* #define HAVE_MS_C_RUNTIME */
-
-/*
  * Define this if you have sys/uio.h
  */
 #define  HAVE_SYS_UIO_H 1
@@ -93,37 +60,12 @@
 #define HAVE_SYMLINKS 1
 
 /*
- * Define this if we have localtime_r().
- */
-/* #define HAVE_LOCALTIME_R 1 */
-
-/*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-#define HAVE_IOCTL
-
-/*
- * Define this if we want to use WinSock.
- */
-/* #define HAVE_WINSOCK */
-
-/*
  * Define this if have clock_gettime() and friends
  *
  */
 #define HAVE_POSIX_CLOCKS
 
 /*
- * Define this if we have linux style epoll()
- */
-#define HAVE_EPOLL
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -144,11 +86,6 @@
 /* #define _LARGEFILE_SOURCE 1 */
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -156,17 +93,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Defined if we have the gettid() system call.
- */
-#define HAVE_GETTID
-
-/* 
  * Defined if we have the sched_setscheduler() call
  */
 #define HAVE_SCHED_SETSCHEDULER
@@ -204,11 +130,6 @@
 #define HAVE_MADVISE 1
 
 /*
- * Define if we have Linux's dbus 
- */
-/* #define HAVE_DBUS 1 */
-
-/*
  * Define if tm struct has tm_gmtoff field
  */
 #define HAVE_TM_GMTOFF 1
@@ -224,12 +145,6 @@
 #define HAVE_LIBC_SYSTEM_PROPERTIES 1
 
 /*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-/* #define HAVE_SYSTEM_PROPERTY_SERVER */
-
-/*
  * What CPU architecture does this platform use?
  */
 #define ARCH_X86
@@ -240,11 +155,6 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.so"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '/'
@@ -265,11 +175,6 @@
 #define HAVE_STRLCPY 1
 
 /*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
  * Define if the BSD funopen() function exists on the system.
  */
 #define HAVE_FUNOPEN 1
@@ -314,14 +219,4 @@
  */
 #define HAVE_PRINTF_ZD 1
 
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/windows/AndroidConfig.h b/core/combo/include/arch/windows/AndroidConfig.h
index 204740d..786f95e 100644
--- a/core/combo/include/arch/windows/AndroidConfig.h
+++ b/core/combo/include/arch/windows/AndroidConfig.h
@@ -64,13 +64,6 @@
 #define HAVE_WIN32_THREADS
 
 /*
- * Do we have the futex syscall?
- */
-
-/* #define HAVE_FUTEX */
-
-
-/*
  * Process creation model.  Choose one:
  *
  * HAVE_FORKEXEC - use fork() and exec()
@@ -82,14 +75,7 @@
 #  define HAVE_WIN32_PROC
 #endif
 
-/*
- * IPC model.  Choose one:
- *
- * HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
- * HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
- * HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
- * HAVE_ANDROID_IPC - use Android versions (?, mmap).
- */
+/* TODO: replace references to this. */
 #define HAVE_WIN32_IPC
 
 /*
@@ -112,13 +98,6 @@
 #endif
 
 /*
- * Define this if you have <sys/sendfile.h>
- */
-#ifdef __CYGWIN__
-#  define  HAVE_SYS_SENDFILE_H 1
-#endif
-
-/*
  * Define this if you build against MSVCRT.DLL
  */
 #ifndef __CYGWIN__
@@ -132,22 +111,6 @@
 #define  HAVE_SYS_UIO_H
 #endif
 
-
-/*
- * Define this if we have localtime_r().
- */
-/* #define HAVE_LOCALTIME_R 1 */
-
-/*
- * Define this if we have gethostbyname_r().
- */
-/* #define HAVE_GETHOSTBYNAME_R */
-
-/*
- * Define this if we have ioctl().
- */
-/* #define HAVE_IOCTL */
-
 /*
  * Define this if we want to use WinSock.
  */
@@ -156,17 +119,6 @@
 #endif
 
 /*
- * Define this if your platforms implements symbolic links
- * in its filesystems
- */
-/* #define HAVE_SYMLINKS */
-
-/*
- * Define this if have clock_gettime() and friends
- */
-/* #define HAVE_POSIX_CLOCKS */
-
-/*
  * Endianness of the target machine.  Choose one:
  *
  * HAVE_ENDIAN_H -- have endian.h header we can include.
@@ -188,11 +140,6 @@
 #define _LARGEFILE_SOURCE 1
 
 /*
- * Define if platform has off64_t (and lseek64 and other xxx64 functions)
- */
-#define HAVE_OFF64_T
-
-/*
  * Defined if we have the backtrace() call for retrieving a stack trace.
  * Needed for CallStack to operate; if not defined, CallStack is
  * non-functional.
@@ -200,38 +147,6 @@
 #define HAVE_BACKTRACE 0
 
 /*
- * Defined if we have the cxxabi.h header for demangling C++ symbols.  If
- * not defined, stack crawls will be displayed with raw mangled symbols
- */
-#define HAVE_CXXABI 0
-
-/*
- * Define if tm struct has tm_gmtoff field
- */
-/* #define HAVE_TM_GMTOFF 1 */
-
-/*
- * Define if dirent struct has d_type field
- */
-/* #define HAVE_DIRENT_D_TYPE 1 */
-
-/*
- * Define if libc includes Android system properties implementation.
- */
-/* #define HAVE_LIBC_SYSTEM_PROPERTIES */
-
-/*
- * Define if system provides a system property server (should be
- * mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
- */
-/* #define HAVE_SYSTEM_PROPERTY_SERVER */
-
-/*
- * Define if we have madvise() in <sys/mman.h>
- */
-/*#define HAVE_MADVISE 1*/
-
-/*
  * Add any extra platform-specific defines here.
  */
 #define WIN32 1                 /* stock Cygwin doesn't define these */
@@ -251,21 +166,11 @@
 #define OS_SHARED_LIB_FORMAT_STR    "lib%s.dll"
 
 /*
- * type for the third argument to mincore().
- */
-#define MINCORE_POINTER_TYPE unsigned char *
-
-/*
  * The default path separator for the platform
  */
 #define OS_PATH_SEPARATOR '\\'
 
 /*
- * Is the filesystem case sensitive?
- */
-/* #define OS_CASE_SENSITIVE */
-
-/*
  * Define if <sys/socket.h> exists.
  * Cygwin has it, but not MinGW.
  */
@@ -276,21 +181,6 @@
 #endif
 
 /*
- * Define if the strlcpy() function exists on the system.
- */
-/* #define HAVE_STRLCPY 1 */
-
-/*
- * Define if the open_memstream() function exists on the system.
- */
-/* #define HAVE_OPEN_MEMSTREAM 1 */
-
-/*
- * Define if the BSD funopen() function exists on the system.
- */
-/* #define HAVE_FUNOPEN 1 */
-
-/*
  * Define if <winsock2.h> exists.
  * Only MinGW has it.
  */
@@ -308,48 +198,8 @@
 #endif
 
 /*
- * Define if writev() exists.
- */
-/* #define HAVE_WRITEV */
-
-/*
- * Define if <stdint.h> exists.
- */
-/* #define HAVE_STDINT_H */
-
-/*
  * Define if <stdbool.h> exists.
  */
 #define HAVE_STDBOOL_H
 
-/*
- * Define if <sched.h> exists.
- */
-/* #define HAVE_SCHED_H */
-
-/*
- * Define if pread() exists
- */
-/* #define HAVE_PREAD 1 */
-
-/*
- * Define if we have st_mtim in struct stat
- */
-/* #define HAVE_STAT_ST_MTIM 1 */
-
-/*
- * Define if printf() supports %zd for size_t arguments
- */
-/* #define HAVE_PRINTF_ZD 1 */
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a BSD style function prototype.
- */
-#define HAVE_BSD_QSORT_R 0
-
-/*
- * Define to 1 if <stdlib.h> provides qsort_r() with a GNU style function prototype.
- */
-#define HAVE_GNU_QSORT_R 0
-
 #endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/select.mk b/core/combo/select.mk
index d495c6f..00c1558 100644
--- a/core/combo/select.mk
+++ b/core/combo/select.mk
@@ -106,6 +106,11 @@
   endif
 endif
 
+# Stash the original values of CC and CXX so we can still use the non-wrapped
+# values later.
+$(combo_2nd_arch_prefix)CC_BARE := $($(combo_var_prefix)CC)
+$(combo_2nd_arch_prefix)CXX_BARE := $($(combo_var_prefix)CXX)
+
 # The C/C++ compiler can be wrapped by setting the CC/CXX_WRAPPER vars.
 ifdef CC_WRAPPER
   ifneq ($(CC_WRAPPER),$(firstword $($(combo_var_prefix)CC)))
diff --git a/core/config.mk b/core/config.mk
index bfa5610..3ceb392 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -552,7 +552,7 @@
 DEX2OAT_TARGET_CPU_VARIANT := $(TARGET_CPU_VARIANT)
 DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := default
 ifneq (,$(filter $(DEX2OAT_TARGET_CPU_VARIANT),cortex-a7 cortex-a15 krait denver))
-  DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := div
+  DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := lpae,div
 endif
 
 ifdef TARGET_2ND_ARCH
@@ -560,7 +560,7 @@
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT := $(TARGET_2ND_CPU_VARIANT)
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := default
 ifneq (,$(filter $($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT),cortex-a7 cortex-a15 krait denver))
-  $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := div
+  $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := lpae,div
 endif
 endif
 
diff --git a/core/cxx_stl_setup.mk b/core/cxx_stl_setup.mk
new file mode 100644
index 0000000..c688088
--- /dev/null
+++ b/core/cxx_stl_setup.mk
@@ -0,0 +1,70 @@
+#############################################################
+## Set up flags based on LOCAL_CXX_STL.
+## Input variables: LOCAL_CXX_STL
+## Output variables: My_cflags, my_c_includes, my_shared_libraries, etc.
+#############################################################
+
+# Only around for development purposes. Will be removed soon.
+my_libcxx_is_default := false
+
+# Select the appropriate C++ STL
+ifeq ($(strip $(LOCAL_CXX_STL)),default)
+    ifndef LOCAL_SDK_VERSION
+        ifeq ($(strip $(my_libcxx_is_default)),true)
+            # Platform code. Select the appropriate STL.
+            my_cxx_stl := libc++
+        else
+            my_cxx_stl := libstdc++
+        endif
+    else
+        my_cxx_stl := ndk
+    endif
+else
+    my_cxx_stl := $(strip $(LOCAL_CXX_STL))
+endif
+
+ifneq ($(filter $(my_cxx_stl),libc++ libc++_static),)
+    my_cflags += -D_USING_LIBCXX
+    my_c_includes += external/libcxx/include
+    ifeq ($(my_cxx_stl),libc++)
+        my_shared_libraries += libc++
+    else
+        my_static_libraries += libc++_static
+    endif
+
+    ifdef LOCAL_IS_HOST_MODULE
+        my_cppflags += -nostdinc++
+        my_ldflags += -nodefaultlibs
+        my_ldlibs += -lc -lm
+    endif
+else ifneq ($(filter $(my_cxx_stl),stlport stlport_static),)
+    ifndef LOCAL_IS_HOST_MODULE
+        my_c_includes += external/stlport/stlport bionic/libstdc++/include \
+                         bionic
+        ifeq ($(my_cxx_stl),stlport)
+            my_shared_libraries += libstdc++ libstlport
+        else
+            my_static_libraries += libstdc++ libstlport_static
+        endif
+    endif
+else ifeq ($(my_cxx_stl),ndk)
+    # Using an NDK STL. Handled farther up in this file.
+    ifndef LOCAL_IS_HOST_MODULE
+        my_system_shared_libraries += libstdc++
+    endif
+else ifeq ($(my_cxx_stl),libstdc++)
+    # Using bionic's basic libstdc++. Not actually an STL. Only around until the
+    # tree is in good enough shape to not need it.
+    ifndef LOCAL_IS_HOST_MODULE
+        my_c_includes += bionic/libstdc++/include
+        my_system_shared_libraries += libstdc++
+    endif
+    # Host builds will use GNU libstdc++.
+else ifeq ($(my_cxx_stl),none)
+    ifdef LOCAL_IS_HOST_MODULE
+        my_cppflags += -nostdinc++
+        my_ldflags += -nodefaultlibs -lc -lm
+    endif
+else
+    $(error $(my_cxx_stl) is not a supported STL.)
+endif
diff --git a/core/definitions.mk b/core/definitions.mk
index 38aa720..1007f33 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1176,7 +1176,7 @@
 
 # $(1): the full path of the source static library.
 define _extract-and-include-single-target-whole-static-lib
-@echo "preparing StaticLib: $(PRIVATE_MODULE) [including $(1)]"
+@echo "preparing StaticLib: $(PRIVATE_MODULE) [including $(strip $(1))]"
 $(hide) ldir=$(PRIVATE_INTERMEDIATES_DIR)/WHOLE/$(basename $(notdir $(1)))_objs;\
     rm -rf $$ldir; \
     mkdir -p $$ldir; \
@@ -1190,8 +1190,16 @@
 
 endef
 
+# $(1): the full path of the source static library.
+define extract-and-include-whole-static-libs-first
+$(if $(strip $(1)),
+@echo "preparing StaticLib: $(PRIVATE_MODULE) [including $(strip $(1))]"
+$(hide) cp $(1) $@)
+endef
+
 define extract-and-include-target-whole-static-libs
-$(foreach lib,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES), \
+$(call extract-and-include-whole-static-libs-first, $(firstword $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)))
+$(foreach lib,$(wordlist 2,999,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)), \
     $(call _extract-and-include-single-target-whole-static-lib, $(lib)))
 endef
 
@@ -1213,7 +1221,7 @@
 
 # $(1): the full path of the source static library.
 define _extract-and-include-single-host-whole-static-lib
-@echo "preparing StaticLib: $(PRIVATE_MODULE) [including $(1)]"
+@echo "preparing StaticLib: $(PRIVATE_MODULE) [including $(strip $(1))]"
 $(hide) ldir=$(PRIVATE_INTERMEDIATES_DIR)/WHOLE/$(basename $(notdir $(1)))_objs;\
     rm -rf $$ldir; \
     mkdir -p $$ldir; \
@@ -1228,7 +1236,8 @@
 endef
 
 define extract-and-include-host-whole-static-libs
-$(foreach lib,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES), \
+$(call extract-and-include-whole-static-libs-first, $(firstword $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)))
+$(foreach lib,$(wordlist 2,999,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)), \
     $(call _extract-and-include-single-host-whole-static-lib, $(lib)))
 endef
 
@@ -1436,7 +1445,6 @@
 	$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_LD_DIRS) \
 	$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 		$(PRIVATE_HOST_GLOBAL_LDFLAGS) \
-		$(HOST_FPIE_FLAGS) \
 	) \
 	$(PRIVATE_LDFLAGS) \
 	-o $@ \
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index 8a19b66..72cb9f0 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -69,7 +69,7 @@
 $(call dex2oat-one-file,$(1),$(2))
 endef
 
-DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS := $(DEX2OATD_DEPENDENCY)
+DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS := $(DEX2OAT_DEPENDENCY)
 DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT := $(DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME)
 ifdef TARGET_2ND_ARCH
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT := $($(TARGET_2ND_ARCH_VAR_PREFIX)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME)
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 5af2be2..b61b180 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -18,6 +18,13 @@
 
 PRELOADED_CLASSES := frameworks/base/preloaded-classes
 
+# Default to debug version to help find bugs.
+# Set USE_DEX2OAT_DEBUG to false for only building non-debug versions.
+ifneq ($(USE_DEX2OAT_DEBUG), false)
+DEX2OAT = $(DEX2OATD)
+DEX2OAT_DEPENDENCY = $(DEX2OATD_DEPENDENCY)
+endif
+
 # start of image reserved address space
 LIBART_IMG_HOST_BASE_ADDRESS   := 0x60000000
 LIBART_IMG_TARGET_BASE_ADDRESS := 0x70000000
@@ -82,7 +89,7 @@
 define dex2oat-one-file
 $(hide) rm -f $(2)
 $(hide) mkdir -p $(dir $(2))
-$(hide) $(DEX2OATD) \
+$(hide) $(DEX2OAT) \
 	--runtime-arg -Xms$(DEX2OAT_XMS) --runtime-arg -Xmx$(DEX2OAT_XMX) \
 	--boot-image=$(PRIVATE_DEX_PREOPT_IMAGE_LOCATION) \
 	--dex-file=$(1) \
@@ -91,5 +98,6 @@
 	--android-root=$(PRODUCT_OUT)/system \
 	--instruction-set=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH) \
 	--instruction-set-features=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES) \
-	--include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols
+	--include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols \
+	$(PRIVATE_DEX_PREOPT_FLAGS)
 endef
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index fe4c5a4..90a3b5a 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -39,11 +39,11 @@
 
 $($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME): PRIVATE_2ND_ARCH_VAR_PREFIX := $(my_2nd_arch_prefix)
 # Use dex2oat debug version for better error reporting
-$($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME) : $(LIBART_TARGET_BOOT_DEX_FILES) $(DEX2OATD_DEPENDENCY)
+$($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME) : $(LIBART_TARGET_BOOT_DEX_FILES) $(DEX2OAT_DEPENDENCY)
 	@echo "target dex2oat: $@ ($?)"
 	@mkdir -p $(dir $@)
 	@mkdir -p $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))
-	$(hide) $(DEX2OATD) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) --runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
+	$(hide) $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) --runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
 		--image-classes=$(PRELOADED_CLASSES) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
 		$(addprefix --dex-location=,$(LIBART_TARGET_BOOT_DEX_LOCATIONS)) \
@@ -53,4 +53,5 @@
 		--image=$@ --base=$(LIBART_IMG_TARGET_BASE_ADDRESS) \
 		--instruction-set=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH) \
 		--instruction-set-features=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES) \
-		--android-root=$(PRODUCT_OUT)/system --include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols
+		--android-root=$(PRODUCT_OUT)/system --include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols \
+		$(PRODUCT_DEX_PREOPT_BOOT_FLAGS)
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 741f9a3..90ae08f 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -11,7 +11,12 @@
     ifndef LOCAL_DEX_PREOPT # LOCAL_DEX_PREOPT undefined
       ifneq ($(filter $(TARGET_OUT)/%,$(my_module_path)),) # Installed to system.img.
         ifeq (,$(LOCAL_APK_LIBRARIES)) # LOCAL_APK_LIBRARIES empty
-          LOCAL_DEX_PREOPT := $(DEX_PREOPT_DEFAULT)
+          # If we have product-specific config for this module?
+          ifeq (disable,$(DEXPREOPT.$(TARGET_PRODUCT).$(LOCAL_MODULE).CONFIG))
+            LOCAL_DEX_PREOPT := false
+          else
+            LOCAL_DEX_PREOPT := $(DEX_PREOPT_DEFAULT)
+          endif
         else # LOCAL_APK_LIBRARIES not empty
           LOCAL_DEX_PREOPT := nostripping
         endif # LOCAL_APK_LIBRARIES not empty
@@ -94,6 +99,14 @@
 endif  # boot jar
 
 ifdef built_odex
+ifndef LOCAL_DEX_PREOPT_FLAGS
+LOCAL_DEX_PREOPT_FLAGS := $(DEXPREOPT.$(TARGET_PRODUCT).$(LOCAL_MODULE).CONFIG)
+ifndef LOCAL_DEX_PREOPT_FLAGS
+LOCAL_DEX_PREOPT_FLAGS := $(PRODUCT_DEX_PREOPT_DEFAULT_FLAGS)
+endif
+endif
+$(built_odex): PRIVATE_DEX_PREOPT_FLAGS := $(LOCAL_DEX_PREOPT_FLAGS)
+
 # Use pattern rule - we may have multiple installed odex files.
 # Ugly syntax - See the definition get-odex-file-path.
 $(installed_odex) : $(dir $(LOCAL_INSTALLED_MODULE))%$(notdir $(word 1,$(installed_odex))) \
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 124a91b..cfc9650 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -58,7 +58,7 @@
 # Under Linux, if USE_MINGW is set, we change HOST_OS to Windows to build the
 # Windows SDK. Only a subset of tools and SDK will manage to build properly.
 ifeq ($(HOST_OS),linux)
-ifneq ($(USE_MINGW),)
+ifdef USE_MINGW
   HOST_OS := windows
 endif
 endif
@@ -67,13 +67,6 @@
 $(error Unable to determine HOST_OS from uname -sm: $(UNAME)!)
 endif
 
-# TODO: Replace BUILD_HOST_64bit with a flag that forces 32-bit build,
-# after we default to 64-bit host build.
-ifeq (,$(BUILD_HOST_64bit))
-# Default to 32-bit-by-default multilib host build.
-HOST_PREFER_32_BIT := true
-endif
-
 # HOST_ARCH
 ifneq (,$(findstring x86_64,$(UNAME)))
   HOST_ARCH := x86_64
@@ -81,12 +74,6 @@
   HOST_IS_64_BIT := true
 endif
 
-ifeq ($(HOST_PREFER_32_BIT),true)
-SDK_HOST_ARCH := x86
-else
-SDK_HOST_ARCH := $(HOST_ARCH)
-endif
-
 BUILD_ARCH := $(HOST_ARCH)
 BUILD_2ND_ARCH := $(HOST_2ND_ARCH)
 
@@ -143,6 +130,17 @@
 $(error must be empty or one of: eng user userdebug)
 endif
 
+# Build host as 32-bit for SDK build.
+ifneq ($(filter $(MAKECMDGOALS),win_sdk sdk),)
+HOST_PREFER_32_BIT := true
+endif
+ifdef USE_MINGW
+# We only build sdk host tools in the MinGW windows build.
+# Build it as 32-bit as well.
+HOST_PREFER_32_BIT := true
+endif
+SDK_HOST_ARCH := x86
+
 # Boards may be defined under $(SRC_TARGET_DIR)/board/$(TARGET_DEVICE)
 # or under vendor/*/$(TARGET_DEVICE).  Search in both places, but
 # make sure only one exists.
diff --git a/core/executable_internal.mk b/core/executable_internal.mk
index 9325287..ebb6867 100644
--- a/core/executable_internal.mk
+++ b/core/executable_internal.mk
@@ -35,6 +35,7 @@
 
 # Define PRIVATE_ variables from global vars
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
+my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_dynamic_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_DYNAMIC_O)
@@ -54,6 +55,7 @@
 endif
 $(linked_module): PRIVATE_TARGET_GLOBAL_LD_DIRS := $(my_target_global_ld_dirs)
 $(linked_module): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(my_target_global_ldflags)
+$(linked_module): PRIVATE_TARGET_LIBGCOV := $(my_target_libgcov)
 $(linked_module): PRIVATE_TARGET_LIBGCC := $(my_target_libgcc)
 $(linked_module): PRIVATE_TARGET_LIBATOMIC := $(my_target_libatomic)
 $(linked_module): PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O := $(my_target_crtbegin_dynamic_o)
@@ -62,8 +64,10 @@
 $(linked_module): PRIVATE_TARGET_OUT_INTERMEDIATE_LIBRARIES := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATE_LIBRARIES)
 
 ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
+$(linked_module): PRIVATE_POST_LINK_CMD := $(LOCAL_POST_LINK_CMD)
 $(linked_module): $(my_target_crtbegin_static_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-static-executable)
+	$(PRIVATE_POST_LINK_CMD)
 else
 $(linked_module): $(my_target_crtbegin_dynamic_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
 	$(transform-o-to-executable)
diff --git a/core/find-jdk-tools-jar.sh b/core/find-jdk-tools-jar.sh
index f150a9a..0224829 100755
--- a/core/find-jdk-tools-jar.sh
+++ b/core/find-jdk-tools-jar.sh
@@ -2,7 +2,13 @@
 if [ "x$ANDROID_JAVA_HOME" != x ] && [ -e "$ANDROID_JAVA_HOME/lib/tools.jar" ] ; then
     echo $ANDROID_JAVA_HOME/lib/tools.jar
 else
-    JAVAC=$(which javac)
+    JAVAC=$(realpath $(which javac) 2>/dev/null)
+    if [ -z "$JAVAC" ]; then
+        JAVAC=$(readlink -f $(which javac) 2>/dev/null)
+    fi
+    if [ -z "$JAVAC" ]; then
+        JAVAC=$(which javac)
+    fi
     if [ -z "$JAVAC" ] ; then
         exit 1
     fi
diff --git a/core/host_executable.mk b/core/host_executable.mk
index bf3cde1..0091f3f 100644
--- a/core/host_executable.mk
+++ b/core/host_executable.mk
@@ -13,6 +13,10 @@
 endif
 endif
 
+ifeq ($(LOCAL_NO_FPIE),)
+LOCAL_LDFLAGS += $(HOST_FPIE_FLAGS)
+endif
+
 ifeq ($(my_module_multilib),both)
 ifeq ($(LOCAL_MODULE_PATH_32)$(LOCAL_MODULE_STEM_32),)
 $(error $(LOCAL_PATH): LOCAL_MODULE_STEM_32 or LOCAL_MODULE_PATH_32 is required for LOCAL_MULTILIB := both for module $(LOCAL_MODULE))
diff --git a/core/host_test_internal.mk b/core/host_test_internal.mk
index 691468d..8611c4b 100644
--- a/core/host_test_internal.mk
+++ b/core/host_test_internal.mk
@@ -12,7 +12,14 @@
 LOCAL_CFLAGS += -DGTEST_HAS_STD_STRING -O0 -g
 LOCAL_C_INCLUDES +=  external/gtest/include
 
-ifneq ($(filter libc++,$(LOCAL_SHARED_LIBRARIES)),)
+my_test_libcxx := false
+ifeq (,$(TARGET_BUILD_APPS))
+ifneq ($(filter $(strip $(LOCAL_CXX_STL)),libc++ libc++_static),)
+my_test_libcxx := true
+endif
+endif
+
+ifeq ($(my_test_libcxx),true)
 LOCAL_STATIC_LIBRARIES += libgtest_libc++_host libgtest_main_libc++_host
 else
 LOCAL_STATIC_LIBRARIES += libgtest_host libgtest_main_host
diff --git a/core/main.mk b/core/main.mk
index 9d6e233..0a00950 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -325,9 +325,6 @@
   ifeq ($(user_variant),userdebug)
     # Pick up some extra useful tools
     tags_to_install += debug
-
-    # Enable Dalvik lock contention logging for userdebug builds.
-    ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.lockprof.threshold=500
   else
     # Disable debugging in plain user builds.
     enable_target_debugging :=
@@ -361,6 +358,8 @@
 ifeq (true,$(strip $(enable_target_debugging)))
   # Target is more debuggable and adbd is on by default
   ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
+  # Enable Dalvik lock contention logging.
+  ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.lockprof.threshold=500
   # Include the debugging/testing OTA keys in this build.
   INCLUDE_TEST_OTA_KEYS := true
 else # !enable_target_debugging
@@ -771,10 +770,6 @@
   $(foreach m, $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGES), \
     $(if $(strip $(ALL_MODULES.$(m).INSTALLED) $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).INSTALLED)),,\
       $(eval dangling_modules += $(m))))
-  ifneq ($(TARGET_IS_64_BIT),true)
-    # We know those 64-bit modules don't exist in the 32-bit SDK build.
-    dangling_modules := $(filter-out %64,$(dangling_modules))
-  endif
   ifneq ($(dangling_modules),)
     $(warning: Modules '$(dangling_modules)' in PRODUCT_PACKAGES have nothing to install!)
   endif
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 284884c..7e1ea4b 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -96,16 +96,19 @@
 # of the shared libraries are determined.
 ifdef LOCAL_INSTALLED_MODULE
 ifdef LOCAL_SHARED_LIBRARIES
+my_shared_libraries := $(LOCAL_SHARED_LIBRARIES)
+# Extra shared libraries introduced by LOCAL_CXX_STL.
+include $(BUILD_SYSTEM)/cxx_stl_setup.mk
 $(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)DEPENDENCIES_ON_SHARED_LIBRARIES += \
-  $(my_register_name):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(LOCAL_SHARED_LIBRARIES))
+  $(my_register_name):$(LOCAL_INSTALLED_MODULE):$(subst $(space),$(comma),$(my_shared_libraries))
 
 # We also need the LOCAL_BUILT_MODULE dependency,
 # since we use -rpath-link which points to the built module's path.
-built_shared_libraries := \
+my_built_shared_libraries := \
     $(addprefix $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)OUT_INTERMEDIATE_LIBRARIES)/, \
     $(addsuffix $($(my_prefix)SHLIB_SUFFIX), \
-        $(LOCAL_SHARED_LIBRARIES)))
-$(LOCAL_BUILT_MODULE) : $(built_shared_libraries)
+        $(my_shared_libraries)))
+$(LOCAL_BUILT_MODULE) : $(my_built_shared_libraries)
 endif
 endif
 
diff --git a/core/product.mk b/core/product.mk
index 0075acd..ed906cb 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -100,14 +100,18 @@
     PRODUCT_FACTORY_BUNDLE_MODULES \
     PRODUCT_RUNTIMES \
     PRODUCT_BOOT_JARS \
-    PRODUCT_DEX_PREOPT_IMAGE_IN_DATA \
     PRODUCT_SUPPORTS_VERITY \
     PRODUCT_OEM_PROPERTIES \
     PRODUCT_SYSTEM_PROPERTY_BLACKLIST \
     PRODUCT_SYSTEM_SERVER_JARS \
     PRODUCT_VERITY_SIGNING_KEY \
     PRODUCT_SYSTEM_VERITY_PARTITION \
-    PRODUCT_VENDOR_VERITY_PARTITION
+    PRODUCT_VENDOR_VERITY_PARTITION \
+    PRODUCT_DEX_PREOPT_IMAGE_IN_DATA \
+    PRODUCT_DEX_PREOPT_MODULE_CONFIGS \
+    PRODUCT_DEX_PREOPT_DEFAULT_FLAGS \
+    PRODUCT_DEX_PREOPT_BOOT_FLAGS \
+
 
 define dump-product
 $(info ==== $(1) ====)\
@@ -299,3 +303,14 @@
 define add-to-product-copy-files-if-exists
 $(if $(wildcard $(word 1,$(subst :, ,$(1)))),$(1))
 endef
+
+# whitespace placeholder when we record module's dex-preopt config.
+_PDPMC_SP_PLACE_HOLDER := |@SP@|
+# Set up dex-preopt config for a module.
+# $(1) list of module names
+# $(2) the modules' dex-preopt config
+define add-product-dex-preopt-module-config
+$(eval _c := $(subst $(space),$(_PDPMC_SP_PLACE_HOLDER),$(strip $(2))))\
+$(eval PRODUCT_DEX_PREOPT_MODULE_CONFIGS += \
+  $(foreach m,$(1),$(m)=$(_c)))
+endef
diff --git a/core/product_config.mk b/core/product_config.mk
index 32e351c..d4ba364 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -416,3 +416,21 @@
 # If there is no room in /system for the image, place it in /data
 PRODUCT_DEX_PREOPT_IMAGE_IN_DATA := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_IMAGE_IN_DATA))
+
+PRODUCT_DEX_PREOPT_DEFAULT_FLAGS := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_DEFAULT_FLAGS))
+PRODUCT_DEX_PREOPT_BOOT_FLAGS := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_BOOT_FLAGS))
+# Resolve and setup per-module dex-preopot configs.
+PRODUCT_DEX_PREOPT_MODULE_CONFIGS := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_MODULE_CONFIGS))
+# If a module has multiple setups, the first takes precedence.
+_pdpmc_modules :=
+$(foreach c,$(PRODUCT_DEX_PREOPT_MODULE_CONFIGS),\
+  $(eval m := $(firstword $(subst =,$(space),$(c))))\
+  $(if $(filter $(_pdpmc_modules),$(m)),,\
+    $(eval _pdpmc_modules += $(m))\
+    $(eval cf := $(patsubst $(m)=%,%,$(c)))\
+    $(eval cf := $(subst $(_PDPMC_SP_PLACE_HOLDER),$(space),$(cf)))\
+    $(eval DEXPREOPT.$(TARGET_PRODUCT).$(m).CONFIG := $(cf))))
+_pdpmc_modules :=
diff --git a/core/shared_library_internal.mk b/core/shared_library_internal.mk
index c01be37..baedb3b 100644
--- a/core/shared_library_internal.mk
+++ b/core/shared_library_internal.mk
@@ -40,6 +40,7 @@
 
 # Define PRIVATE_ variables from global vars
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
+my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_so_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_SO_O)
@@ -57,6 +58,7 @@
 endif
 $(linked_module): PRIVATE_TARGET_GLOBAL_LD_DIRS := $(my_target_global_ld_dirs)
 $(linked_module): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(my_target_global_ldflags)
+$(linked_module): PRIVATE_TARGET_LIBGCOV := $(my_target_libgcov)
 $(linked_module): PRIVATE_TARGET_LIBGCC := $(my_target_libgcc)
 $(linked_module): PRIVATE_TARGET_LIBATOMIC := $(my_target_libatomic)
 $(linked_module): PRIVATE_TARGET_CRTBEGIN_SO_O := $(my_target_crtbegin_so_o)
diff --git a/core/target_test_internal.mk b/core/target_test_internal.mk
index 95d4159..50f4036 100644
--- a/core/target_test_internal.mk
+++ b/core/target_test_internal.mk
@@ -5,7 +5,17 @@
 LOCAL_CFLAGS += -DGTEST_OS_LINUX_ANDROID -DGTEST_HAS_STD_STRING
 
 LOCAL_C_INCLUDES += external/gtest/include
-ifneq ($(filter libc++,$(LOCAL_SHARED_LIBRARIES)),)
+
+my_test_libcxx := false
+ifndef LOCAL_SDK_VERSION
+ifeq (,$(TARGET_BUILD_APPS))
+ifneq ($(filter $(strip $(LOCAL_CXX_STL)),libc++ libc++_static),)
+my_test_libcxx := true
+endif
+endif
+endif
+
+ifeq ($(my_test_libcxx),true)
 LOCAL_STATIC_LIBRARIES += libgtest_libc++ libgtest_main_libc++
 else
 LOCAL_STATIC_LIBRARIES += libgtest libgtest_main
@@ -14,8 +24,7 @@
 LOCAL_C_INCLUDES += bionic \
                     bionic/libstdc++/include \
                     external/stlport/stlport
-LOCAL_SHARED_LIBRARIES += libstlport
-LOCAL_STATIC_LIBRARIES += libstdc++
+LOCAL_SHARED_LIBRARIES += libstlport libstdc++
 endif
 endif
 
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 3ae5860..e06c985 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -82,6 +82,11 @@
         domain.te \
         file.te \
         file_contexts \
+        goldfish_setup.te \
+        goldfish_logcat.te \
+        property.te \
+        property_contexts \
+        qemu_props.te \
         qemud.te \
         rild.te \
         shell.te \
diff --git a/target/board/generic/sepolicy/file_contexts b/target/board/generic/sepolicy/file_contexts
index f204cde..bbc34af 100644
--- a/target/board/generic/sepolicy/file_contexts
+++ b/target/board/generic/sepolicy/file_contexts
@@ -2,3 +2,5 @@
 /dev/socket/qemud	u:object_r:qemud_socket:s0
 /system/bin/qemud	u:object_r:qemud_exec:s0
 /sys/qemu_trace(/.*)?	--	u:object_r:sysfs_writable:s0
+/system/etc/init.goldfish.sh u:object_r:goldfish_setup_exec:s0
+/system/bin/qemu-props	     u:object_r:qemu_props_exec:s0
diff --git a/target/board/generic/sepolicy/goldfish_logcat.te b/target/board/generic/sepolicy/goldfish_logcat.te
new file mode 100644
index 0000000..34ef280
--- /dev/null
+++ b/target/board/generic/sepolicy/goldfish_logcat.te
@@ -0,0 +1,11 @@
+# goldfish-logcat service:  runs logcat -Q
+type goldfish_logcat, domain;
+permissive_or_unconfined(goldfish_logcat)
+
+domain_auto_trans(init, logcat_exec, goldfish_logcat)
+
+# Read from logd.
+read_logd(goldfish_logcat)
+
+# Write to /dev/ttyS2
+allow goldfish_logcat serial_device:chr_file { write open };
diff --git a/target/board/generic/sepolicy/goldfish_setup.te b/target/board/generic/sepolicy/goldfish_setup.te
new file mode 100644
index 0000000..786c1c2
--- /dev/null
+++ b/target/board/generic/sepolicy/goldfish_setup.te
@@ -0,0 +1,19 @@
+# goldfish-setup service: runs init.goldfish.sh script
+type goldfish_setup, domain;
+type goldfish_setup_exec, exec_type, file_type;
+permissive_or_unconfined(goldfish_setup)
+
+init_daemon_domain(goldfish_setup)
+
+# Inherit open file to shell (interpreter) for script.
+allow goldfish_setup shell_exec:file read;
+
+# Run ifconfig, route commands to configure interfaces and routes.
+allow goldfish_setup system_file:file execute_no_trans;
+allow goldfish_setup self:capability { net_admin net_raw };
+allow goldfish_setup self:udp_socket create_socket_perms;
+
+# Set net.eth0.dns*, debug.sf.nobootanimation
+unix_socket_connect(goldfish_setup, property, init)
+allow goldfish_setup system_prop:property_service set;
+allow goldfish_setup debug_prop:property_service set;
diff --git a/target/board/generic/sepolicy/property.te b/target/board/generic/sepolicy/property.te
new file mode 100644
index 0000000..b3d15f8
--- /dev/null
+++ b/target/board/generic/sepolicy/property.te
@@ -0,0 +1 @@
+type qemu_prop, property_type;
diff --git a/target/board/generic/sepolicy/property_contexts b/target/board/generic/sepolicy/property_contexts
new file mode 100644
index 0000000..5f741f8
--- /dev/null
+++ b/target/board/generic/sepolicy/property_contexts
@@ -0,0 +1 @@
+qemu.                   u:object_r:qemu_prop:s0
diff --git a/target/board/generic/sepolicy/qemu_props.te b/target/board/generic/sepolicy/qemu_props.te
new file mode 100644
index 0000000..ade111d
--- /dev/null
+++ b/target/board/generic/sepolicy/qemu_props.te
@@ -0,0 +1,10 @@
+# qemu-props service:  Sets system properties on boot.
+type qemu_props, domain;
+type qemu_props_exec, exec_type, file_type;
+permissive_or_unconfined(qemu_props)
+
+init_daemon_domain(qemu_props)
+
+# Set properties.
+unix_socket_connect(qemu_props, property, init)
+allow qemu_props { qemu_prop dalvik_prop config_prop }:property_service set;
diff --git a/target/board/generic_arm64/device.mk b/target/board/generic_arm64/device.mk
index 11a6a31..62dfa1b 100644
--- a/target/board/generic_arm64/device.mk
+++ b/target/board/generic_arm64/device.mk
@@ -30,6 +30,16 @@
     frameworks/av/media/libstagefright/data/media_codecs_google_video.xml:system/etc/media_codecs_google_video.xml \
     device/generic/goldfish/camera/media_codecs.xml:system/etc/media_codecs.xml
 
+# The ranchu configuration files are needed to run under qemu-android
+PRODUCT_COPY_FILES += $(call add-to-product-copy-files-if-exists,\
+    device/generic/goldfish/init.ranchu.rc:root/init.ranchu.rc \
+    device/generic/goldfish/fstab.ranchu:root/fstab.ranchu \
+    device/generic/goldfish/ueventd.ranchu.rc:root/ueventd.ranchu.rc)
+
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \
     vibrator.goldfish
+
+# Adjust the Dalvik heap to be appropriate for a tablet.
+$(call inherit-product-if-exists, frameworks/base/build/tablet-dalvik-heap.mk)
+$(call inherit-product-if-exists, frameworks/native/build/tablet-dalvik-heap.mk)
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index a319ad7..dbc715a 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -64,6 +64,11 @@
         domain.te \
         file.te \
         file_contexts \
+        goldfish_setup.te \
+        goldfish_logcat.te \
+        property.te \
+        property_contexts \
+        qemu_props.te \
         qemud.te \
         rild.te \
         shell.te \
diff --git a/target/board/generic_mips/device.mk b/target/board/generic_mips/device.mk
index 590f422..06a7d8a 100644
--- a/target/board/generic_mips/device.mk
+++ b/target/board/generic_mips/device.mk
@@ -34,5 +34,4 @@
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \
     power.goldfish \
-    vibrator.goldfish \
-    libffi
+    vibrator.goldfish
diff --git a/target/board/generic_mips64/device.mk b/target/board/generic_mips64/device.mk
index 015686e..66ec9db 100644
--- a/target/board/generic_mips64/device.mk
+++ b/target/board/generic_mips64/device.mk
@@ -33,5 +33,4 @@
 
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \
-    power.goldfish \
-    libffi
+    power.goldfish
diff --git a/target/board/generic_x86/BoardConfig.mk b/target/board/generic_x86/BoardConfig.mk
index 5d091f5..78b7590 100644
--- a/target/board/generic_x86/BoardConfig.mk
+++ b/target/board/generic_x86/BoardConfig.mk
@@ -53,6 +53,11 @@
         file_contexts \
         healthd.te \
         installd.te \
+        goldfish_setup.te \
+        goldfish_logcat.te \
+        property.te \
+        property_contexts \
+        qemu_props.te \
         qemud.te \
         rild.te \
         shell.te \
diff --git a/target/product/aosp_arm64.mk b/target/product/aosp_arm64.mk
index e119466..ea8ec06 100644
--- a/target/product/aosp_arm64.mk
+++ b/target/product/aosp_arm64.mk
@@ -23,8 +23,6 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_arm64/device.mk)
 
-PRODUCT_RUNTIMES := runtime_libart_default
-
 include $(SRC_TARGET_DIR)/product/emulator.mk
 PRODUCT_NAME := aosp_arm64
 PRODUCT_DEVICE := generic_arm64
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index b60c948..9f52336 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -23,7 +23,6 @@
     atrace \
     bootanimation \
     debuggerd \
-    debuggerd64 \
     dumpstate \
     dumpsys \
     gralloc.default \
@@ -57,7 +56,6 @@
     libui \
     libutils \
     linker \
-    linker64 \
     lmkd \
     logcat \
     logwrapper \
@@ -80,6 +78,10 @@
     selinux_version \
     service_contexts
 
+# Ensure that this property is always defined so that bionic_systrace.cpp
+# can rely on it being initially set by init.
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
+    debug.atrace.tags.enableflags=0
 
 PRODUCT_COPY_FILES += \
     system/core/rootdir/init.usb.rc:root/init.usb.rc \
diff --git a/target/product/sdk_phone_arm64.mk b/target/product/sdk_phone_arm64.mk
index c501f14..a0cf6c1 100644
--- a/target/product/sdk_phone_arm64.mk
+++ b/target/product/sdk_phone_arm64.mk
@@ -21,6 +21,7 @@
 
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/board/generic_arm64/device.mk)
 
 # Overrides
 PRODUCT_BRAND := generic_arm64
diff --git a/tools/acp/Android.mk b/tools/acp/Android.mk
index 33c5567..e819e0c 100644
--- a/tools/acp/Android.mk
+++ b/tools/acp/Android.mk
@@ -21,5 +21,6 @@
 LOCAL_C_INCLUDES := build/libs/host/include
 LOCAL_MODULE := acp
 LOCAL_ACP_UNAVAILABLE := true
+LOCAL_CXX_STL := none
 
 include $(BUILD_HOST_EXECUTABLE)
diff --git a/tools/signapk/SignApk.java b/tools/signapk/SignApk.java
index e661e50..d020736 100644
--- a/tools/signapk/SignApk.java
+++ b/tools/signapk/SignApk.java
@@ -621,8 +621,12 @@
             this.type = new ASN1ObjectIdentifier(CMSObjectIdentifiers.data.getId());
         }
 
+        /**
+         * This should actually return byte[] or something similar, but nothing
+         * actually checks it currently.
+         */
         public Object getContent() {
-            throw new UnsupportedOperationException();
+            return this;
         }
 
         public ASN1ObjectIdentifier getContentType() {
diff --git a/tools/signtos/Android.mk b/tools/signtos/Android.mk
new file mode 100644
index 0000000..94ab944
--- /dev/null
+++ b/tools/signtos/Android.mk
@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2014 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+LOCAL_PATH := $(call my-dir)
+
+# the signtos tool - signs Trusty images
+# ============================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := signtos
+LOCAL_SRC_FILES := SignTos.java
+LOCAL_JAR_MANIFEST := SignTos.mf
+LOCAL_STATIC_JAVA_LIBRARIES := bouncycastle-host bouncycastle-bcpkix-host
+include $(BUILD_HOST_JAVA_LIBRARY)
diff --git a/tools/signtos/SignTos.java b/tools/signtos/SignTos.java
new file mode 100644
index 0000000..485ad2f
--- /dev/null
+++ b/tools/signtos/SignTos.java
@@ -0,0 +1,314 @@
+/*
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.signtos;
+
+import org.bouncycastle.asn1.ASN1InputStream;
+import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.lang.reflect.Constructor;
+import java.security.GeneralSecurityException;
+import java.security.Key;
+import java.security.KeyFactory;
+import java.security.MessageDigest;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.PublicKey;
+import java.security.Security;
+import java.security.Signature;
+import java.security.interfaces.ECKey;
+import java.security.interfaces.ECPublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.util.Arrays;
+
+import javax.crypto.Cipher;
+import javax.crypto.EncryptedPrivateKeyInfo;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+
+/**
+ * Signs Trusty images for use with operating systems that support it.
+ */
+public class SignTos {
+    /** Size of the signature footer in bytes. */
+    private static final int SIGNATURE_BLOCK_SIZE = 256;
+
+    /** Current signature version code we use. */
+    private static final int VERSION_CODE = 1;
+
+    /** Size of the header on the file to skip. */
+    private static final int HEADER_SIZE = 512;
+
+    private static BouncyCastleProvider sBouncyCastleProvider;
+
+    /**
+     * Reads the password from stdin and returns it as a string.
+     *
+     * @param keyFile The file containing the private key.  Used to prompt the user.
+     */
+    private static String readPassword(File keyFile) {
+        // TODO: use Console.readPassword() when it's available.
+        System.out.print("Enter password for " + keyFile + " (password will not be hidden): ");
+        System.out.flush();
+        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
+        try {
+            return stdin.readLine();
+        } catch (IOException ex) {
+            return null;
+        }
+    }
+
+    /**
+     * Decrypt an encrypted PKCS#8 format private key.
+     *
+     * Based on ghstark's post on Aug 6, 2006 at
+     * http://forums.sun.com/thread.jspa?threadID=758133&messageID=4330949
+     *
+     * @param encryptedPrivateKey The raw data of the private key
+     * @param keyFile The file containing the private key
+     */
+    private static PKCS8EncodedKeySpec decryptPrivateKey(byte[] encryptedPrivateKey, File keyFile)
+        throws GeneralSecurityException {
+        EncryptedPrivateKeyInfo epkInfo;
+        try {
+            epkInfo = new EncryptedPrivateKeyInfo(encryptedPrivateKey);
+        } catch (IOException ex) {
+            // Probably not an encrypted key.
+            return null;
+        }
+
+        char[] password = readPassword(keyFile).toCharArray();
+
+        SecretKeyFactory skFactory = SecretKeyFactory.getInstance(epkInfo.getAlgName());
+        Key key = skFactory.generateSecret(new PBEKeySpec(password));
+
+        Cipher cipher = Cipher.getInstance(epkInfo.getAlgName());
+        cipher.init(Cipher.DECRYPT_MODE, key, epkInfo.getAlgParameters());
+
+        try {
+            return epkInfo.getKeySpec(cipher);
+        } catch (InvalidKeySpecException ex) {
+            System.err.println("signapk: Password for " + keyFile + " may be bad.");
+            throw ex;
+        }
+    }
+
+    /** Read a PKCS#8 format private key. */
+    private static PrivateKey readPrivateKey(File file) throws IOException,
+            GeneralSecurityException {
+        DataInputStream input = new DataInputStream(new FileInputStream(file));
+        try {
+            byte[] bytes = new byte[(int) file.length()];
+            input.read(bytes);
+
+            /* Check to see if this is in an EncryptedPrivateKeyInfo structure. */
+            PKCS8EncodedKeySpec spec = decryptPrivateKey(bytes, file);
+            if (spec == null) {
+                spec = new PKCS8EncodedKeySpec(bytes);
+            }
+
+            /*
+             * Now it's in a PKCS#8 PrivateKeyInfo structure. Read its Algorithm
+             * OID and use that to construct a KeyFactory.
+             */
+            ASN1InputStream bIn = new ASN1InputStream(new ByteArrayInputStream(spec.getEncoded()));
+            PrivateKeyInfo pki = PrivateKeyInfo.getInstance(bIn.readObject());
+            String algOid = pki.getPrivateKeyAlgorithm().getAlgorithm().getId();
+
+            return KeyFactory.getInstance(algOid).generatePrivate(spec);
+        } finally {
+            input.close();
+        }
+    }
+
+    /**
+     * Tries to load a JSE Provider by class name. This is for custom PrivateKey
+     * types that might be stored in PKCS#11-like storage.
+     */
+    private static void loadProviderIfNecessary(String providerClassName) {
+        if (providerClassName == null) {
+            return;
+        }
+
+        final Class<?> klass;
+        try {
+            final ClassLoader sysLoader = ClassLoader.getSystemClassLoader();
+            if (sysLoader != null) {
+                klass = sysLoader.loadClass(providerClassName);
+            } else {
+                klass = Class.forName(providerClassName);
+            }
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+            System.exit(1);
+            return;
+        }
+
+        Constructor<?> constructor = null;
+        for (Constructor<?> c : klass.getConstructors()) {
+            if (c.getParameterTypes().length == 0) {
+                constructor = c;
+                break;
+            }
+        }
+        if (constructor == null) {
+            System.err.println("No zero-arg constructor found for " + providerClassName);
+            System.exit(1);
+            return;
+        }
+
+        final Object o;
+        try {
+            o = constructor.newInstance();
+        } catch (Exception e) {
+            e.printStackTrace();
+            System.exit(1);
+            return;
+        }
+        if (!(o instanceof Provider)) {
+            System.err.println("Not a Provider class: " + providerClassName);
+            System.exit(1);
+        }
+
+        Security.insertProviderAt((Provider) o, 1);
+    }
+
+    private static String getSignatureAlgorithm(Key key) {
+        if ("EC".equals(key.getAlgorithm())) {
+            ECKey ecKey = (ECKey) key;
+            int curveSize = ecKey.getParams().getOrder().bitLength();
+            if (curveSize <= 256) {
+                return "SHA256withECDSA";
+            } else if (curveSize <= 384) {
+                return "SHA384withECDSA";
+            } else {
+                return "SHA512withECDSA";
+            }
+        } else {
+            throw new IllegalArgumentException("Unsupported key type " + key.getAlgorithm());
+        }
+    }
+
+    /**
+     * @param inputFilename
+     * @param outputFilename
+     */
+    private static void signWholeFile(InputStream input, OutputStream output, PrivateKey signingKey)
+            throws Exception {
+        Signature sig = Signature.getInstance(getSignatureAlgorithm(signingKey));
+        sig.initSign(signingKey);
+
+        byte[] buffer = new byte[8192];
+
+        /* Skip the header. */
+        int skippedBytes = 0;
+        while (skippedBytes != HEADER_SIZE) {
+            int bytesRead = input.read(buffer, 0, HEADER_SIZE - skippedBytes);
+            output.write(buffer, 0, bytesRead);
+            skippedBytes += bytesRead;
+        }
+
+        int totalBytes = 0;
+        for (;;) {
+            int bytesRead = input.read(buffer);
+            if (bytesRead == -1) {
+                break;
+            }
+            totalBytes += bytesRead;
+            sig.update(buffer, 0, bytesRead);
+            output.write(buffer, 0, bytesRead);
+        }
+
+        byte[] sigBlock = new byte[SIGNATURE_BLOCK_SIZE];
+        sigBlock[0] = VERSION_CODE;
+        sig.sign(sigBlock, 1, sigBlock.length - 1);
+
+        output.write(sigBlock);
+    }
+
+    private static void usage() {
+        System.err.println("Usage: signtos " +
+                           "[-providerClass <className>] " +
+                           " privatekey.pk8 " +
+                           "input.img output.img");
+        System.exit(2);
+    }
+
+    public static void main(String[] args) throws Exception {
+        if (args.length < 3) {
+            usage();
+        }
+
+        String providerClass = null;
+        String providerArg = null;
+
+        int argstart = 0;
+        while (argstart < args.length && args[argstart].startsWith("-")) {
+            if ("-providerClass".equals(args[argstart])) {
+                if (argstart + 1 >= args.length) {
+                    usage();
+                }
+                providerClass = args[++argstart];
+                ++argstart;
+            } else {
+                usage();
+            }
+        }
+
+        /*
+         * Should only be "<privatekey> <input> <output>" left.
+         */
+        if (argstart != args.length - 3) {
+            usage();
+        }
+
+        sBouncyCastleProvider = new BouncyCastleProvider();
+        Security.addProvider(sBouncyCastleProvider);
+
+        loadProviderIfNecessary(providerClass);
+
+        String keyFilename = args[args.length - 3];
+        String inputFilename = args[args.length - 2];
+        String outputFilename = args[args.length - 1];
+
+        PrivateKey privateKey = readPrivateKey(new File(keyFilename));
+
+        InputStream input = new BufferedInputStream(new FileInputStream(inputFilename));
+        OutputStream output = new BufferedOutputStream(new FileOutputStream(outputFilename));
+        try {
+            SignTos.signWholeFile(input, output, privateKey);
+        } finally {
+            input.close();
+            output.close();
+        }
+
+        System.out.println("Successfully signed: " + outputFilename);
+    }
+}
diff --git a/tools/signtos/SignTos.mf b/tools/signtos/SignTos.mf
new file mode 100644
index 0000000..d860296
--- /dev/null
+++ b/tools/signtos/SignTos.mf
@@ -0,0 +1 @@
+Main-Class: com.android.signtos.SignTos
diff --git a/tools/zipalign/Android.mk b/tools/zipalign/Android.mk
index 7986798..4194f81 100644
--- a/tools/zipalign/Android.mk
+++ b/tools/zipalign/Android.mk
@@ -26,7 +26,7 @@
 LOCAL_LDLIBS += -lrt
 endif
 
-ifneq ($(strip $(USE_MINGW)),)
+ifdef USE_MINGW
 LOCAL_STATIC_LIBRARIES += libz
 else
 LOCAL_LDLIBS += -lz