[ 11%] Built target allegro
[ 13%] Built target allegro_primitives
make[2]: *** No rule to make target `/usr/lib/libpng.so', needed by `lib/liballegro_image.so.5.1.0'.  Stop.
make[1]: *** [addons/image/CMakeFiles/allegro_image.dir/all] Error 2
make: *** [all] Error 2