convert_png.c:5:10: fatal error: png.h: No such file or directory
 #include <png.h>
          ^~~~~~~
compilation terminated.
make[1]: *** [Makefile:15: gbagfx] Error 1
make: *** [Makefile:121: tools] Error 2
gcc -Wall -Wextra -Werror -std=c11 -O2 -s -DPNG_SKIP_SETJMP_CHECK main.c convert_png.c gfx.c jasc_pal.c lz.c rl.c util.c font.c -o gbagfx  -lpng -lz
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
/bin/bash: tools/scaninc/scaninc: No such file or directory
...