ERROR : '__android_log_print' android studio

i've been working with NDK, OpenCV and android studio. But when i start debug my project, it shows error undefined '__android_log_print'

C:/Users/Jeems/Documents/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: build/intermediates/ndk/obj/local/armeabi/objs/pulse/pt_fraunhofer_pulse_Pulse_Face.o: in function i::Java_pt_fraunhofer_pulse_Pulse_00024Face(double):src/main/jni/pt_fraunhofer_pulse_Pulse_Face.cpp:24: error: undefined reference to '__android_log_print'
C:/Users/Jeems/Documents/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: build/intermediates/ndk/obj/local/armeabi/objs/pulse/pt_fraunhofer_pulse_Pulse_Face.o: in function i::Java_pt_fraunhofer_pulse_Pulse_00024Face(double):src/main/jni/pt_fraunhofer_pulse_Pulse_Face.cpp:42: error: undefined reference to '__android_log_print'
C:/Users/Jeems/Documents/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: build/intermediates/ndk/obj/local/armeabi/objs/pulse/pt_fraunhofer_pulse_Pulse_Face.o: in function Java_pt_fraunhofer_pulse_Pulse_00024Face__1box:src/main/jni/pt_fraunhofer_pulse_Pulse_Face.cpp:54: error: undefined reference to '__android_log_print'
C:/Users/Jeems/Documents/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: build/intermediates/ndk/obj/local/armeabi/objs/pulse/pt_fraunhofer_pulse_Pulse_Face.o: in function Java_pt_fraunhofer_pulse_Pulse_00024Face__1box:src/main/jni/pt_fraunhofer_pulse_Pulse_Face.cpp:74: error: undefined reference to '__android_log_print'
collect2: ld returned 1 exit status
make: *** [build/intermediates/ndk/obj/local/armeabi/libpulse.so] Error 1
:pulseandroid:ndkBuild FAILED
Error:Execution failed for task ':pulseandroid:ndkBuild'.
> Process 'command 'C:\Users\Jeems\Documents\android-ndk-r8d\ndk-build.cmd'' finished with non-zero exit value 2

Here is my android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

include C:\Users\Jeems\Documents\OpenCV-2.4.11-android-sdk\sdk\native\jni\OpenCV.mk

LOCAL_MODULE     := pulse
LOCAL_SRC_FILES  := pt_fraunhofer_pulse_Pulse_Face.cpp
LOCAL_SRC_FILES  += pt_fraunhofer_pulse_Pulse.cpp
LOCAL_SRC_FILES  += Pulse.cpp
LOCAL_SRC_FILES  += EvmGdownIIR.cpp
LOCAL_SRC_FILES  += ext/opencv.cpp
LOCAL_SRC_FILES  += profiler/profiler.cpp
LOCAL_C_INCLUDES += $(LOCAL_PATH)
LOCAL_C_INCLUDES += C:\Users\Jeems\Documents\OpenCV-2.4.11-android-sdk\sdk\native\jni\include\
LOCAL_LDLIBS     := -ldl -landroid -llog

include $(BUILD_SHARED_LIBRARY)