usage            1091 contrib/libtests/pngunknown.c             usage(d.program, "--touch: missing file name");
usage            1102 contrib/libtests/pngunknown.c       usage(d.program, "missing test file");
usage            1108 contrib/libtests/pngunknown.c       usage(d.program, "extra arguments");
usage              54 contrib/pngminus/png2pnm.c void usage ();
usage              96 contrib/pngminus/png2pnm.c           usage();
usage             102 contrib/pngminus/png2pnm.c           usage();
usage             129 contrib/pngminus/png2pnm.c       usage();
usage              52 contrib/pngminus/pnm2png.c void usage ();
usage              94 contrib/pngminus/pnm2png.c           usage();
usage             100 contrib/pngminus/pnm2png.c           usage();
usage             127 contrib/pngminus/pnm2png.c       usage();
usage              42 contrib/tools/cvtcolor.c       usage(prog);
usage              81 contrib/tools/cvtcolor.c          usage(prog);
usage              87 contrib/tools/cvtcolor.c          usage(prog);
usage             140 contrib/tools/cvtcolor.c          usage(prog);
usage             153 contrib/tools/cvtcolor.c          usage(prog);
usage            3956 contrib/tools/pngfix.c          usage(prog);
usage            4015 contrib/tools/pngfix.c       usage(prog);