Feat/ketopt

[jaromil]

change option arguments to accept more commandline switches also multiple times

  ketopt_t opt = KETOPT_INIT;
  int i, c;
  while ((c = ketopt(&opt, argc, argv, 1, "vD:L:l:C:I:", NULL)) >= 0) {
    if (c == 'v') {
      _err("Running version: %s\n",VERSION);
      tcc_delete(TCC);
      exit(0); // print version and exit
    } else if (c == 'D') { // define
      _err("define: %s",opt.arg);
      tcc_define_symbol(TCC, opt.arg, NULL); // TODO: sym=var
    } else if (c == 'L') { // library path
      _err("lib path: %s",opt.arg);
      tcc_add_library_path(TCC,tmpdir);
    } else if (c == 'l') { // library link
      _err("lib: %s",opt.arg);
      tcc_add_library(TCC, opt.arg);
    } else if (c == 'C') { // library link
      _err("cflags: %s",opt.arg);
      tcc_set_options(TCC, opt.arg);
    } else if (c == 'I') { // library link
      tcc_add_include_path(TCC,opt.arg);
    }
    else if (c == '?') _err("unknown opt: -%c\n", opt.opt? opt.opt : ':');
    else if (c == ':') _err("missing arg: -%c\n", opt.opt? opt.opt : ':');
  }

ketopt allows to have calls at every parsed option so they can append