Trouble building using Android.mk

Hi, this is my first attempt at running CUDA on Android Flashed TK1.

I installed CodeWorksforAndroid.
I have both my .c and .cu files in /src directory of my Android project. Following is the Android.mk I am using:

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)


GCC=$(NDK_ROOT)/toolchains/arm-linux-androideabi-4.6/gen_standalone/linux-x86_64/bin/arm-linux-androideabi-g++
NVCC=$(CUDA_TOOLKIT_ROOT)/bin/nvcc -ccbin $(GCC) -target-cpu-arch=ARM -m32 -arch=sm_30 -O3 -Xptxas '-dlcm=ca' -target-os-variant=Android --use_fast_math

FILE_LIST := $(wildcard $(LOCAL_PATH)/src/*.cu) $(wildcard $(LOCAL_PATH)/src/*.c) 
LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%)

LOCAL_CFLAGS := -O2 -g -W -Wall -Wall -Wfatal-errors -DGPU

LOCAL_LDFLAGS := -lm -pthread -lstdc++ 

LOCAL_C_EXTENSION := cu c

ARCH= --gpu-architecture=compute_20 --gpu-code=compute_20

LOCAL_C_INCLUDES := $(CUDA_TOOLKIT_ROOT)/targets/armv7-linux-androideabi/include -lcudart

LOCAL_MODULE := darknet

include $(BUILD_EXECUTABLE)

I am getting the following errors:
error: undefined reference to ‘cudaMalloc’
error: undefined reference to ‘cudaMalloc’
error: undefined reference to ‘cudaFree’

And the build system cant find reference to all the .cu files.

Can you please point to what flags I am missing?

Also if you could point to a resource/tutorials to build CUDA applications in Android tree, that would be very helpful.

Thank you