x86_64-pc-linux-gnu-gcc -march=corei7-avx -O2 -pipe -I/usr/include/mjpegtools -I/usr/include/freetype2 -D__STDC_CONSTANT_MACROS -c -o yuvsubtitle.o yuvsubtitle.c
x86_64-pc-linux-gnu-gcc -march=corei7-avx -O2 -pipe -I/usr/include/mjpegtools -I/usr/include/freetype2 -D__STDC_CONSTANT_MACROS -c -o utilyuv.o utilyuv.c
yuvsubtitle.c: In function ‘ftdims’:
yuvsubtitle.c:158:4: error: ‘pen_y’ undeclared (first use in this function)
yuvsubtitle.c:158:4: note: each undeclared identifier is reported only once for each function it appears in
make: *** [yuvsubtitle.o] Error 1