Initial Contribution
diff --git a/core/combo/linux-arm.mk b/core/combo/linux-arm.mk
new file mode 100644
index 0000000..adb82d3
--- /dev/null
+++ b/core/combo/linux-arm.mk
@@ -0,0 +1,153 @@
+# Configuration for Linux on ARM.
+# Included by combo/select.make
+
+# You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
+ifeq ($(strip $($(combo_target)TOOLS_PREFIX)),)
+$(combo_target)TOOLS_PREFIX := \
+ prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-eabi-4.2.1/bin/arm-eabi-
+endif
+
+$(combo_target)CC := $($(combo_target)TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
+$(combo_target)CXX := $($(combo_target)TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
+$(combo_target)AR := $($(combo_target)TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
+$(combo_target)OBJCOPY := $($(combo_target)TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
+$(combo_target)LD := $($(combo_target)TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
+
+$(combo_target)NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
+
+TARGET_arm_release_CFLAGS := -fomit-frame-pointer \
+ -fstrict-aliasing \
+ -funswitch-loops \
+ -finline-limit=300
+
+TARGET_thumb_release_CFLAGS := -mthumb \
+ -Os \
+ -fomit-frame-pointer \
+ -fno-strict-aliasing \
+ -finline-limit=64
+
+# When building for debug, compile everything as arm.
+TARGET_arm_debug_CFLAGS := $(TARGET_arm_release_CFLAGS) -fno-omit-frame-pointer -fno-strict-aliasing
+TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) -marm -fno-omit-frame-pointer
+
+# NOTE: if you try to build a debug build with thumb, several
+# of the libraries (libpv, libwebcore, libkjs) need to be built
+# with -mlong-calls. When built at -O0, those libraries are
+# too big for a thumb "BL <label>" to go from one end to the other.
+
+## As hopefully a temporary hack,
+## use this to force a full ARM build (for easier debugging in gdb)
+## (don't forget to do a clean build)
+##TARGET_arm_release_CFLAGS := $(TARGET_arm_release_CFLAGS) -fno-omit-frame-pointer
+##TARGET_thumb_release_CFLAGS := $(TARGET_thumb_release_CFLAGS) -marm -fno-omit-frame-pointer
+
+## on some hosts, the target cross-compiler is not available so do not run this command
+ifneq ($(wildcard $($(combo_target)CC)),)
+$(combo_target)LIBGCC := $(shell $($(combo_target)CC) -mthumb-interwork -print-libgcc-file-name)
+endif
+
+$(combo_target)GLOBAL_CFLAGS += \
+ -march=armv5te -mtune=xscale \
+ -msoft-float -fpic \
+ -mthumb-interwork \
+ -ffunction-sections \
+ -funwind-tables \
+ -fstack-protector \
+ -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ \
+ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ \
+ -include $(call select-android-config-h,linux-arm)
+
+$(combo_target)GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
+
+$(combo_target)RELEASE_CFLAGS := \
+ -DSK_RELEASE -DNDEBUG \
+ -O2 -g \
+ -Wstrict-aliasing=2 \
+ -finline-functions \
+ -fno-inline-functions-called-once \
+ -fgcse-after-reload \
+ -frerun-cse-after-loop \
+ -frename-registers
+
+libc_root := bionic/libc
+libm_root := bionic/libm
+libstdc++_root := bionic/libstdc++
+libthread_db_root := bionic/libthread_db
+
+# unless CUSTOM_KERNEL_HEADERS is defined, we're going to use
+# symlinks located in out/ to point to the appropriate kernel
+# headers. see 'config/kernel_headers.make' for more details
+#
+ifneq ($(CUSTOM_KERNEL_HEADERS),)
+ KERNEL_HEADERS_COMMON := $(CUSTOM_KERNEL_HEADERS)
+ KERNEL_HEADERS_ARCH := $(CUSTOM_KERNEL_HEADERS)
+else
+ KERNEL_HEADERS_COMMON := $(libc_root)/kernel/common
+ KERNEL_HEADERS_ARCH := $(libc_root)/kernel/arch-$(TARGET_ARCH)
+endif
+KERNEL_HEADERS := $(KERNEL_HEADERS_COMMON) $(KERNEL_HEADERS_ARCH)
+
+$(combo_target)C_INCLUDES := \
+ $(libc_root)/arch-arm/include \
+ $(libc_root)/include \
+ $(libstdc++_root)/include \
+ $(KERNEL_HEADERS) \
+ $(libm_root)/include \
+ $(libm_root)/include/arch/arm \
+ $(libthread_db_root)/include
+
+TARGET_CRTBEGIN_STATIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_static.o
+TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtbegin_dynamic.o
+TARGET_CRTEND_O := $(TARGET_OUT_STATIC_LIBRARIES)/crtend_android.o
+
+TARGET_STRIP_MODULE:=true
+
+$(combo_target)DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
+
+$(combo_target)CUSTOM_LD_COMMAND := true
+define transform-o-to-shared-lib-inner
+$(TARGET_CXX) \
+ -nostdlib -Wl,-soname,$(notdir $@) -Wl,-T,$(BUILD_SYSTEM)/armelf.xsc \
+ -Wl,--gc-sections \
+ -Wl,-shared,-Bsymbolic \
+ $(TARGET_GLOBAL_LD_DIRS) \
+ $(PRIVATE_ALL_OBJECTS) \
+ -Wl,--whole-archive \
+ $(call normalize-host-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
+ -Wl,--no-whole-archive \
+ $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
+ $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
+ -o $@ \
+ $(PRIVATE_LDFLAGS) \
+ $(TARGET_LIBGCC)
+endef
+
+define transform-o-to-executable-inner
+$(TARGET_CXX) -nostdlib -Bdynamic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
+ -Wl,-dynamic-linker,/system/bin/linker \
+ -Wl,--gc-sections \
+ -Wl,-z,nocopyreloc \
+ -o $@ \
+ $(TARGET_GLOBAL_LD_DIRS) \
+ -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \
+ $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
+ $(TARGET_CRTBEGIN_DYNAMIC_O) \
+ $(PRIVATE_ALL_OBJECTS) \
+ $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
+ $(PRIVATE_LDFLAGS) \
+ $(TARGET_LIBGCC) \
+ $(TARGET_CRTEND_O)
+endef
+
+define transform-o-to-static-executable-inner
+$(TARGET_CXX) -nostdlib -Bstatic -Wl,-T,$(BUILD_SYSTEM)/armelf.x \
+ -Wl,--gc-sections \
+ -o $@ \
+ $(TARGET_GLOBAL_LD_DIRS) \
+ $(TARGET_CRTBEGIN_STATIC_O) \
+ $(PRIVATE_LDFLAGS) \
+ $(PRIVATE_ALL_OBJECTS) \
+ $(call normalize-target-libraries,$(PRIVATE_ALL_STATIC_LIBRARIES)) \
+ $(TARGET_LIBGCC) \
+ $(TARGET_CRTEND_O)
+endef