linker - undefined references with debgging symbols on android -

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i trying compile app debug options set. have included android/bitmap.h file. compiles methods in android/bitmap.h file, linker has problems says 

/home/user5432/workspace/bitmapproj/obj/local/armeabi/objs-debug/mybitmap.o : in function java_com_example_plasma_plasmaview_renderplasma "undefined reference androidbitmap_getinfo" "undefined reference androidbitmap_lockpixels" "undefined reference androidbitmap_unlockpixels"

can tell me what's problem?

needed add local_ldflags +=-ljnigraphics in android.mk file


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