Error: Junk character at end of line, first unrecognized character valued 0x7F

I am a newbie to Android NDK, I am using android-ndk-r5 to build the Gearoid source code. After several warning of the following type

warning: null characters ignored

the assembler terminates with the following error message:

Error: junk at end of line, first unrecognized character valued 0x7Fmake: **** [/cygdrive/c/emus/Gearoid/obj/local/armabi/libgg.so] Error 1

Any pointers would be greatly appreciated. Thanks in advance.