I have seen threads about this issue here, and I have tried the suggested fixes but I still get the same error. Basically I am using above version of ndk to compile a sample project composed of C and assembly files. I get the following error: /tmp/ccEEI8oF.s: Assembler messages: /tmp/ccEEI8oF.s:16: Error: selected processor does not support ARM mode `smc #0' make: *** [obj/local/armeabi/objs/hello_tz/main_normal.o] Error 1 I have tried changing the -march=armv7-a. But I still get the error. Here is a copy of my Android.mk file: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # give module name APP_PLATFORM := android-18 LOCAL_MODULE := hello_tz $(warning This is in NDK_ROOT $(NDK_ROOT)) LOCAL_C_INCLUDES += $(NDK_ROOT)/platforms/$(APP_PLATFORM)/arch-arm/usr/include APP_ABI := armeabi-v7a #LOCAL_CFLAGS := -mcpu=cortex-m3 -mthumb -march=armv7-a -mtune=cortex-a15 #LOCAL_CFLAGS := -mcpu=cortex-a15 -march=armv7-a LOCAL_CFLAGS := -march=armv7-a -D__ASSEMBLY__ -mabi=aapcs-linux -gdwarf-2 -Wall -Wundef -Wstrict-prototypes -Wno-trigrap hs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer- checks -Os -Wno-maybe-uninitialized -marm -fno-dwarf2-cfi-asm -fstack-protector -mabi=aapcs-linux -mno-thumb-interwork - funwind-tables -D__LINUX_ARM_ARCH__=7 -mcpu=cortex-a15 -msoft-float -Uarm -Wframe-larger-than=1024 -Wno-unused-but-set-v ariable -fomit-frame-pointer -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -D CC_HAVE_ASM_GOTO # list your C files to compile FILE_LIST := $(patsubst %.c,%.c.arm,$(wildcard $(LOCAL_PATH)/*.c)) #$(warning here is what is in FILE_LIST after an attempt to collect all the C files$(FILE_LIST)) FILE_LIST += $(wildcard $(LOCAL_PATH)/*.s) #$(warning here is what is in FILE_LIST after an attempt to collect all the S files$(FILE_LIST)) LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%) # this option will build executables instead of building library for android application. include $(BUILD_EXECUTABLE)