LAme encoder not building

Question

I am trying to implement LAME in my project to encode mp3 using this tutorial :- http://developer.samsung.com/android/technical-docs/Porting-and-using-LAME-MP3-on-Android-with-JNI

When I am trying to build it :it is giving me error : make.exe: * No rule to make target C:/Users/ci5/workspace/audirecorder//jni/. /libmp3lame/bitstream.c', needed byC:/Users/ci5/workspace/audirecorder//obj/lo cal/armeabi/objs/mp3lame/./libmp3lame/bitstream.o'. Stop.

I am not able to resolve the issue. I have made the make file just by creating a file called Android.mk.Is this wrong approach? If yes, how do we actually make a makefile.

content of makefile as given in tutorial is :-

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE        := libmp3lame
LOCAL_SRC_FILES     := \
./libmp3lame/encoder.c \
./libmp3lame/fft.c \
./libmp3lame/gain_analysis.c \
./libmp3lame/id3tag.c \
./libmp3lame/lame.c \
./libmp3lame/bitstream.c \
./libmp3lame/mpglib_interface.c \
./libmp3lame/newmdct.c \
./libmp3lame/presets.c \
./libmp3lame/psymodel.c \
./libmp3lame/quantize.c \
./libmp3lame/quantize_pvt.c \
./libmp3lame/reservoir.c \
./libmp3lame/set_get.c \
./libmp3lame/tables.c \
./libmp3lame/takehiro.c \
./libmp3lame/util.c \
./libmp3lame/vbrquantize.c \
./libmp3lame/VbrTag.c \
./libmp3lame/version.c

LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)