required_argument   55 examples/heif_enc.cc   {"quality",    required_argument, 0, 'q' },
required_argument   56 examples/heif_enc.cc   {"output",     required_argument, 0, 'o' },
required_argument   58 examples/heif_enc.cc   {"thumb",      required_argument, 0, 't' },
required_argument   44 examples/heif_test.cc   {"decode-img", required_argument,      0, 'd' },
required_argument   45 examples/heif_test.cc   {"metadata",   required_argument,      0, 'm' },
required_argument  190 extra/getopt_long.c 			if (long_options[match].has_arg == required_argument ||
required_argument  197 extra/getopt_long.c 			if ((long_options[match].has_arg == required_argument)