diff --git a/core/clang/HOST_x86.mk b/core/clang/HOST_x86.mk
index f38f04e..ee61e5e 100644
--- a/core/clang/HOST_x86.mk
+++ b/core/clang/HOST_x86.mk
@@ -1,8 +1,13 @@
 
 include $(BUILD_SYSTEM)/clang/x86.mk
+include $(BUILD_SYSTEM)/clang/x86_common.mk
 
 ifeq ($(HOST_OS),linux)
 CLANG_CONFIG_x86_HOST_TRIPLE := i686-linux-gnu
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_ASFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CPPFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CPPFLAGS)
+CLANG_CONFIG_x86_HOST_COMBO_EXTRA_LDFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS)
 endif
 ifeq ($(HOST_OS),darwin)
 CLANG_CONFIG_x86_HOST_TRIPLE := i686-apple-darwin
@@ -15,25 +20,29 @@
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_x86_EXTRA_ASFLAGS) \
-  -target $(CLANG_CONFIG_x86_HOST_TRIPLE) \
+  $(CLANG_CONFIG_x86_HOST_COMBO_EXTRA_ASFLAGS) \
+  -target $(CLANG_CONFIG_x86_HOST_TRIPLE)
 
 CLANG_CONFIG_x86_HOST_EXTRA_CFLAGS := \
   $(CLANG_CONFIG_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_x86_EXTRA_CFLAGS) \
+  $(CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_x86_HOST_EXTRA_ASFLAGS)
 
 CLANG_CONFIG_x86_HOST_EXTRA_CPPFLAGS := \
   $(CLANG_CONFIG_EXTRA_CPPFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_CPPFLAGS) \
   $(CLANG_CONFIG_x86_EXTRA_CPPFLAGS) \
+  $(CLANG_CONFIG_x86_HOST_COMBO_EXTRA_CPPFLAGS) \
+  -target $(CLANG_CONFIG_x86_HOST_TRIPLE)
 
 CLANG_CONFIG_x86_HOST_EXTRA_LDFLAGS := \
   $(CLANG_CONFIG_EXTRA_LDFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_LDFLAGS) \
   $(CLANG_CONFIG_x86_EXTRA_LDFLAGS) \
-  -target $(CLANG_CONFIG_x86_HOST_TRIPLE) \
-
+  $(CLANG_CONFIG_x86_HOST_COMBO_EXTRA_LDFLAGS) \
+  -target $(CLANG_CONFIG_x86_HOST_TRIPLE)
 
 define convert-to-host-clang-flags
   $(strip \
diff --git a/core/clang/HOST_x86_64.mk b/core/clang/HOST_x86_64.mk
index ea33a46..d60e15f 100644
--- a/core/clang/HOST_x86_64.mk
+++ b/core/clang/HOST_x86_64.mk
@@ -1,8 +1,13 @@
 
 include $(BUILD_SYSTEM)/clang/x86_64.mk
+include $(BUILD_SYSTEM)/clang/x86_common.mk
 
 ifeq ($(HOST_OS),linux)
 CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-linux-gnu
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_ASFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CPPFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CPPFLAGS)
+CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_LDFLAGS := $(CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS)
 endif
 ifeq ($(HOST_OS),darwin)
 CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-apple-darwin
@@ -15,25 +20,29 @@
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_x86_64_EXTRA_ASFLAGS) \
-  -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE) \
+  $(CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_ASFLAGS) \
+  -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE)
 
 CLANG_CONFIG_x86_64_HOST_EXTRA_CFLAGS := \
   $(CLANG_CONFIG_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_x86_64_EXTRA_CFLAGS) \
+  $(CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CFLAGS) \
   $(CLANG_CONFIG_x86_64_HOST_EXTRA_ASFLAGS)
 
 CLANG_CONFIG_x86_64_HOST_EXTRA_CPPFLAGS := \
   $(CLANG_CONFIG_EXTRA_CPPFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_CPPFLAGS) \
   $(CLANG_CONFIG_x86_64_EXTRA_CPPFLAGS) \
+  $(CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_CPPFLAGS) \
+  -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE)
 
 CLANG_CONFIG_x86_64_HOST_EXTRA_LDFLAGS := \
   $(CLANG_CONFIG_EXTRA_LDFLAGS) \
   $(CLANG_CONFIG_HOST_EXTRA_LDFLAGS) \
   $(CLANG_CONFIG_x86_64_EXTRA_LDFLAGS) \
-  -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE) \
-
+  $(CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_LDFLAGS) \
+  -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE)
 
 define convert-to-host-clang-flags
   $(strip \
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 96f860d..7a513c6 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -38,10 +38,10 @@
   -Wno-unused-but-set-parameter
 
 # Clang flags for all host rules
-CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
-CLANG_CONFIG_HOST_EXTRA_CFLAGS :=
-CLANG_CONFIG_HOST_EXTRA_CPPFLAGS :=
-CLANG_CONFIG_HOST_EXTRA_LDFLAGS :=
+CLANG_CONFIG_HOST_EXTRA_ASFLAGS := --gcc-toolchain=$(HOST_TOOLCHAIN_FOR_CLANG)
+CLANG_CONFIG_HOST_EXTRA_CFLAGS := --gcc-toolchain=$(HOST_TOOLCHAIN_FOR_CLANG)
+CLANG_CONFIG_HOST_EXTRA_CPPFLAGS := --gcc-toolchain=$(HOST_TOOLCHAIN_FOR_CLANG)
+CLANG_CONFIG_HOST_EXTRA_LDFLAGS := --gcc-toolchain=$(HOST_TOOLCHAIN_FOR_CLANG)
 
 # Clang flags for all target rules
 CLANG_CONFIG_TARGET_EXTRA_ASFLAGS :=
@@ -50,7 +50,11 @@
 CLANG_CONFIG_TARGET_EXTRA_LDFLAGS :=
 
 # HOST config
+ifneq ($(strip $(BUILD_HOST_64bit)),)
+include $(BUILD_SYSTEM)/clang/HOST_x86_64.mk
+else
 include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk
+endif
 
 # TARGET config
 clang_2nd_arch_prefix :=
diff --git a/core/clang/x86_common.mk b/core/clang/x86_common.mk
new file mode 100644
index 0000000..d75d83f
--- /dev/null
+++ b/core/clang/x86_common.mk
@@ -0,0 +1,42 @@
+ifeq ($(HOST_OS),darwin)
+# nothing required here yet
+endif
+
+ifeq ($(HOST_OS),linux)
+
+ifneq ($(strip $(BUILD_HOST_64bit)),)
+# Needs to be updated along with gcc
+HOST_ARCH_DESCRIPTOR_FOR_CLANG := x86_64-linux
+else
+# Needs to be updated along with gcc
+HOST_ARCH_DESCRIPTOR_FOR_CLANG := i686-linux
+endif
+
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS := \
+  --sysroot=$(HOST_TOOLCHAIN_FOR_CLANG)/sysroot
+
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS :=
+
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CPPFLAGS :=   \
+  --sysroot=$(HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
+  -isystem $(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/include/c++/4.6.x-google \
+  -isystem $(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/include/c++/4.6.x-google/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG) \
+  -isystem $(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/include/c++/4.6.x-google/backward \
+
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS := \
+  --sysroot=$(HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
+  -B$(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/bin \
+  -B$(HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/4.6.x-google \
+  -L$(HOST_TOOLCHAIN_FOR_CLANG)/lib/gcc/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/4.6.x-google
+
+ifneq ($(strip $(BUILD_HOST_64bit)),)
+# need to add lib64 if building 64-bit, otherwise lib
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS += -L$(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/lib64/
+else
+CLANG_CONFIG_x86_LINUX_HOST_EXTRA_LDFLAGS += -L$(HOST_TOOLCHAIN_FOR_CLANG)/$(HOST_ARCH_DESCRIPTOR_FOR_CLANG)/lib/
+endif
+endif # linux
+
+ifeq ($(HOST_OS),windows)
+# nothing required here yet
+endif
\ No newline at end of file
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index 037dee6..994196a 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -156,3 +156,7 @@
 define get-file-size
 stat -f "%z" $(1)
 endef
+
+# gcc location for clang; to be updated when clang is updated
+# HOST_TOOLCHAIN_ROOT is a Darwin-specific define
+HOST_TOOLCHAIN_FOR_CLANG := $(HOST_TOOLCHAIN_ROOT)
\ No newline at end of file
diff --git a/core/combo/HOST_linux-x86.mk b/core/combo/HOST_linux-x86.mk
index 129acb0..3c87264 100644
--- a/core/combo/HOST_linux-x86.mk
+++ b/core/combo/HOST_linux-x86.mk
@@ -41,10 +41,14 @@
 # which can benefit from 64-bit host arch.
 HOST_GLOBAL_CFLAGS += -m64 -Wa,--noexecstack
 HOST_GLOBAL_LDFLAGS += -m64 -Wl,-z,noexecstack
+# gcc location for clang; to be updated when clang is updated
+HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.7-4.6/
 else
 # We expect SSE3 floating point math.
 HOST_GLOBAL_CFLAGS += -mstackrealign -msse3 -mfpmath=sse -m32 -Wa,--noexecstack
 HOST_GLOBAL_LDFLAGS += -m32 -Wl,-z,noexecstack
+# gcc location for clang; to be updated when clang is updated
+HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/i686-linux-glibc2.7-4.6/
 endif # BUILD_HOST_64bit
 
 ifneq ($(strip $(BUILD_HOST_static)),)