/****************************************************************/
/* This command-line parser is used by both Racket and GRacket. */
/****************************************************************/

#ifdef NEED_CONSOLE_PRINTF
static void (*console_printf)(char *str, ...);
# define PRINTF console_printf
#endif

#include "../start/config.inc"

#ifdef DOS_FILE_SYSTEM
static void record_dll_path(void)
{
  GC_CAN_IGNORE wchar_t *dlldir;
  dlldir = extract_dlldir();
  if (dlldir)
    scheme_set_dll_path(dlldir);
}
#endif

#ifndef DONT_PARSE_COMMAND_LINE
static int is_number_arg(const char *s)
{
  while (*s) {
    if (*s < '0' || *s > '9') {
      if (*s == '.') {
	s++;
	while (*s) {
	  if (*s < '0' || *s > '9')
	    return 0;
	  else
	    s++;
	}
	return 1;
      } else
	return 0;
    } else
      s++;
  }

  return 1;
}

char *add_to_str(const char *addr, long amt)
{
  long addr_v;
  char buf[32];
  addr_v = atoi(addr) + amt;
  sprintf(buf, "%ld", addr_v);
  return strdup(buf);
}

static char *make_embedded_load(const self_exe_t self_exe, const char *file, const char *start, const char *end)
{
  char *s;
  int slen, elen, flen;

  if (file == NULL) {
    long fileoff;
    fileoff = get_segment_offset(self_exe);
    start = add_to_str(start, fileoff);
    end = add_to_str(end, fileoff);
    file = SELF_PATH_TO_BYTES(self_exe);
  }

  slen = strlen(start);
  elen = strlen(end);
  flen = strlen(file);

  s = (char *)malloc(slen + elen + flen + 3);
  memcpy(s, start, slen + 1);
  memcpy(s + slen + 1, end, elen + 1);
  memcpy(s + slen + elen + 2, file, flen + 1);

  return s;
}

static Scheme_Object *check_make_path(const char *prog, const char *real_switch, char *arg)
{
  if (!*arg) {
    PRINTF("%s: empty path after %s switch\n",
           prog, real_switch);
    exit(1);
  }
  return scheme_make_path(arg);
}
#endif

enum {
  mzcmd_EVAL            = 0,
  mzcmd_LOAD            = 1,
  mzcmd_MAIN            = 2,
  mzcmd_REQUIRE_FILE    = 3,
  mzcmd_REQUIRE_LIB     = 4,
  mzcmd_REQUIRE_PLANET  = 5,
  mzcmd_EMBEDDED        = 6,
  mzcmd_EMBEDDED_REG    = 7,
};

/* To avoid having to create a specific mark procedure for
   prcise GC, split argument information into purely atomic
   and purely non-atomic records. */

typedef struct {
  int init_ns;
#ifndef DONT_PARSE_COMMAND_LINE
  int num_enl;
#endif  
#ifndef DONT_LOAD_INIT_FILE
  int no_init_file;
#endif
#ifndef DONT_RUN_REP
  int use_repl;
  int script_mode;
#endif
#ifndef NO_YIELD_BEFORE_EXIT
  int add_yield;
#endif
#ifdef CMDLINE_STDIO_FLAG
  int alternate_rep;
  int no_front;
#endif
} FinishArgsAtoms;

typedef struct {
  FinishArgsAtoms *a;
#ifndef DONT_PARSE_COMMAND_LINE
  char **evals_and_loads;
  int *eval_kind;
  Scheme_Object *main_args;
#endif  
  Scheme_Env *global_env;
  char *init_lib;
} FinishArgs;

typedef void (*Repl_Proc)(Scheme_Env *, FinishArgs *f);

static void configure_environment(Scheme_Object *mod)
{
  Scheme_Object *mli, *dyreq, *a[3], *gi, *v, *vs;
  Scheme_Object *submod, *cr, *mdp, *mpij;

  /* Modern style: look for `runtime-configure' submodule to initialize
     the configuration: */

  submod = scheme_intern_symbol("submod");
  cr = scheme_intern_symbol("configure-runtime");

  if (scheme_is_module_path_index(mod)) {
    mpij = scheme_builtin_value("module-path-index-join");
    a[0] = scheme_make_pair(submod, 
                            scheme_make_pair(scheme_make_utf8_string("."),
                                             scheme_make_pair(cr, scheme_make_null())));
    a[1] = mod;
    submod = scheme_apply(mpij, 2, a);
  } else if (SCHEME_PAIRP(mod) && SAME_OBJ(SCHEME_CAR(mod), submod))
    submod = scheme_append(mod, scheme_make_pair(cr, scheme_make_null()));
  else
    submod = scheme_make_pair(submod, 
                              scheme_make_pair(mod,
                                               scheme_make_pair(cr, scheme_make_null())));
  mdp = scheme_builtin_value("module-declared?");

  a[0] = submod;
  a[1] = scheme_make_true();
  v = scheme_apply(mdp, 2, a);
  if (!SAME_OBJ(scheme_make_false(), v)) {
    dyreq = scheme_builtin_value("dynamic-require");

    a[0] = submod;
    a[1] = scheme_make_false();
    (void)scheme_apply(dyreq, 2, a);
  }

  /* Old style: use `module->language-info' (after new style, for 
     compatibility): */

  mli = scheme_builtin_value("module->language-info");

  a[0] = mod;
  a[1] = scheme_make_true();
  v = scheme_apply(mli, 2, a);
  if (SCHEME_VECTORP(v) && SCHEME_VEC_SIZE(v) == 3) {
    dyreq = scheme_builtin_value("dynamic-require");

    a[0] = SCHEME_VEC_ELS(v)[0];
    a[1] = SCHEME_VEC_ELS(v)[1];
    gi = scheme_apply(dyreq, 2, a);

    a[0] = SCHEME_VEC_ELS(v)[2];
    gi = scheme_apply(gi, 1, a);

    a[0] = cr;
    a[1] = scheme_make_null();
    vs = scheme_apply(gi, 2, a);
    a[0] = vs;
    while (SCHEME_PAIRP(vs)) {
      v = SCHEME_CAR(vs);
      vs = SCHEME_CDR(vs);
      if (SCHEME_VECTORP(v) && SCHEME_VEC_SIZE(v) == 3) {
        /* ok */
      } else {
        break;
      }
    }
    if (!SAME_OBJ(vs, scheme_make_null())) {
      scheme_wrong_type("runtime-configure", "list of vectors of three values",
                        -1, 0, a);
    }

    vs = a[0];
    while (SCHEME_PAIRP(vs)) {
      v = SCHEME_CAR(vs);
      vs = SCHEME_CDR(vs);

      a[0] = SCHEME_VEC_ELS(v)[0];
      a[1] = SCHEME_VEC_ELS(v)[1];
      a[2] = SCHEME_VEC_ELS(v)[2];
      v = scheme_apply(dyreq, 2, a);
      
      a[0] = a[2];
      scheme_apply_multi(v, 1, a);
    }
  }
}

static int finish_cmd_line_run(FinishArgs *fa, Repl_Proc repl)
{
  volatile int exit_val = 0;
  volatile int did_config = 0;

  if (fa->a->init_ns) {
    Scheme_Object *a[1], *nsreq;
    Scheme_Thread * volatile p;
    mz_jmp_buf * volatile save, newbuf;

    nsreq = scheme_builtin_value("namespace-require");

    a[0] = scheme_make_pair(scheme_intern_symbol("lib"),
                            scheme_make_pair(scheme_make_utf8_string(fa->init_lib),
                                             scheme_make_null()));

    p = scheme_get_current_thread();
    save = p->error_buf;
    p->error_buf = &newbuf;
    if (!scheme_setjmp(newbuf)) {
      if (!did_config) {
        configure_environment(a[0]);
        did_config = 1;
      }
      scheme_apply(nsreq, 1, a);
    } else {
      exit_val = 1;
    }        
    p->error_buf = save;
  }

#ifndef DONT_PARSE_COMMAND_LINE
  {
    volatile int i;
    mz_jmp_buf * volatile save, newbuf;

    for (i = 0; i < fa->a->num_enl; i++) {
      if ((fa->eval_kind[i] == mzcmd_LOAD)
          && strcmp(fa->evals_and_loads[i], "-")) {
        if (!scheme_load(fa->evals_and_loads[i])) {
	  exit_val = 1;
	  break;
	}
      } else if ((fa->eval_kind[i] == mzcmd_EVAL)
                 || (fa->eval_kind[i] == mzcmd_LOAD) /* stdin */
                 || (fa->eval_kind[i] == mzcmd_REQUIRE_FILE)
                 || (fa->eval_kind[i] == mzcmd_REQUIRE_LIB)
                 || (fa->eval_kind[i] == mzcmd_REQUIRE_PLANET)
                 || (fa->eval_kind[i] == mzcmd_EMBEDDED)
                 || (fa->eval_kind[i] == mzcmd_EMBEDDED_REG)) {
	Scheme_Thread * volatile p;
	p = scheme_get_current_thread();
	save = p->error_buf;
	p->error_buf = &newbuf;
        
        if (!scheme_setjmp(newbuf)) {
          if (fa->eval_kind[i] == mzcmd_EVAL) {
            scheme_eval_string_all_with_prompt(fa->evals_and_loads[i], fa->global_env, 2);
          } else if (fa->eval_kind[i] == mzcmd_LOAD) {
            /* eval from stdin */
            scheme_eval_all_with_prompt(NULL, fa->global_env, 2);
          } else if (fa->eval_kind[i] == mzcmd_EMBEDDED_REG) {
            scheme_register_embedded_load(-1, fa->evals_and_loads[i]);
            scheme_embedded_load(-1, fa->evals_and_loads[i], 1);
          } else if (fa->eval_kind[i] == mzcmd_EMBEDDED) {
            scheme_embedded_load(-1, fa->evals_and_loads[i], 0);
          } else {
            Scheme_Object *a[2], *nsreq, *mpi;
            char *name;
            nsreq = scheme_builtin_value("namespace-require");
            if (fa->eval_kind[i] == mzcmd_REQUIRE_LIB) {
              name = "lib";
            } else if (fa->eval_kind[i] == mzcmd_REQUIRE_PLANET) {
              name = "planet";
            } else {
              name = "file";
            }
            a[0] = scheme_make_pair(scheme_intern_symbol(name),
                                    scheme_make_pair(scheme_make_utf8_string(fa->evals_and_loads[i]),
                                                     scheme_make_null()));
            if (!scheme_is_module_path(a[0])) {
              scheme_signal_error("require: bad module path: %V derived from command-line argument: %s",
                                  a[0],
                                  fa->evals_and_loads[i]);
            }
            /* Use a module path index so that multiple resolutions are not unduly
               sensitive to changes in the current directory or other configurations: */
            mpi = scheme_make_modidx(a[0], scheme_make_false(), scheme_make_false());
            if (!did_config)
              configure_environment(mpi);
            /* Run the module: */
            a[0] = mpi;
            scheme_apply(nsreq, 1, a);
            /* If there's a `main' submodule, run it: */
            a[0] = scheme_make_modidx(scheme_make_pair(scheme_intern_symbol("submod"),
                                                       scheme_make_pair(scheme_make_utf8_string("."),
                                                                        scheme_make_pair(scheme_intern_symbol("main"),
                                                                                         scheme_make_null()))),
                                      mpi,
                                      scheme_make_false());
            if (scheme_module_is_declared(a[0], 1)) {
              a[1] = scheme_make_false();
              scheme_apply(scheme_builtin_value("dynamic-require"), 2, a);
            }
          }
        } else {
          scheme_clear_escape();
	  exit_val = 1;
	  p->error_buf = save;
	  break;
	}
	p->error_buf = save;
      } else if (fa->eval_kind[i] == mzcmd_MAIN) {
	Scheme_Thread * volatile p;
	p = scheme_get_current_thread();
	save = p->error_buf;
	p->error_buf = &newbuf;
	if (!scheme_setjmp(newbuf)) {
	  Scheme_Object *e, *a[2], *ndi, *idb, *b, *cp;

          ndi = scheme_builtin_value("namespace-datum-introduce");
          e = scheme_intern_symbol("main");
          a[0] = e;
          e = scheme_apply(ndi, 1, a);

          /* Check that `main' is imported and/or defined: */
          idb = scheme_builtin_value("identifier-binding");
          a[0] = e;
          b = scheme_apply(idb, 1, a);
          if (b == scheme_make_false()) {
            if (!scheme_lookup_global(scheme_intern_symbol("main"), fa->global_env)) {
              scheme_signal_error("main: not defined or required into the top-level environment");
            }
          }

          e = scheme_make_pair(e, scheme_vector_to_list(fa->main_args));
          e = scheme_datum_to_kernel_stx(e);
          
	  e = scheme_eval_multi_with_prompt(e, fa->global_env);

          if (SAME_OBJ(e, SCHEME_MULTIPLE_VALUES)) {
            Scheme_Object **mv;
            int cnt;
            mv = p->ku.multiple.array;
            cnt = p->ku.multiple.count;
            scheme_detach_multple_array(mv);
            e = scheme_make_null();
            while (cnt--) {
              e = scheme_make_pair(mv[cnt], e);
            }
          } else {
            e = scheme_make_pair(e, scheme_make_null());
          }

          cp = scheme_get_param(scheme_current_config(), MZCONFIG_PRINT_HANDLER);
          
          while (SCHEME_PAIRP(e)) {
            a[0] = SCHEME_CAR(e);
            scheme_apply_multi(cp, 1, a);
            e = SCHEME_CDR(e);
          }
	} else {
          scheme_clear_escape();
	  exit_val = 1;
	  p->error_buf = save;
	  break;
	}
	p->error_buf = save;
      }
      did_config = 1;
    }
  }
#endif /* DONT_PARSE_COMMAND_LINE */

#ifdef STANDALONE_WITH_EMBEDDED_EXTENSION
  {
    Scheme_Object *f, *a[1];
    mz_jmp_buf * volatile save, newbuf;
    Scheme_Thread * volatile p;
    p = scheme_get_current_thread();
    save = p->error_buf;
    p->error_buf = &newbuf;
    if (!scheme_setjmp(newbuf)) {
      f = scheme_initialize(fa->global_env);
      a[0] = scheme_make_true();
      f = _scheme_apply_multi(f, 1, a);
      if (SAME_OBJ(f, SCHEME_MULTIPLE_VALUES)
	  && (scheme_multiple_count == 2)) {
	f = scheme_multiple_array[0];
	scheme_apply_multi_with_prompt(f, 0, NULL);
      }
    } else {
      scheme_clear_escape();
      exit_val = 1;
    }
    p->error_buf = save;
  }
#endif

#ifndef DONT_LOAD_INIT_FILE
  if (fa->a->use_repl && !fa->a->no_init_file) {
    Scheme_Object *a[2];
    a[0] = get_init_filename(fa->global_env,
                             INIT_FILENAME_CONF_SYM,
                             DEFAULT_INIT_MODULE,
                             USER_INIT_MODULE);
    if (a[0]) {
        mz_jmp_buf * volatile save, newbuf;
        Scheme_Thread * volatile p;
        p = scheme_get_current_thread();
        save = p->error_buf;
        p->error_buf = &newbuf;
        if (!scheme_setjmp(newbuf)) {
          a[1] = scheme_make_integer(0);
          scheme_dynamic_require(2, a);
        } else {
          scheme_clear_escape();
          exit_val = 1;
        }
        p->error_buf = save;
    }
  }
#endif /* DONT_LOAD_INIT_FILE */

#ifndef DONT_RUN_REP
  if (fa->a->use_repl) {
    /* enter read-eval-print loop */
    mz_jmp_buf * volatile save, newbuf;
    Scheme_Thread * volatile p;
    p = scheme_get_current_thread();
    save = p->error_buf;
    p->error_buf = &newbuf;
    if (!scheme_setjmp(newbuf)) {
      repl(fa->global_env, fa);
      exit_val = 0;
    } else {
      scheme_clear_escape();
      exit_val = 1;
#ifndef NO_YIELD_BEFORE_EXIT
      fa->a->add_yield = 0;
#endif
    }
    p->error_buf = save;
  }
#endif /* DONT_RUN_REP */

#ifndef NO_YIELD_BEFORE_EXIT
  if (fa->a->add_yield) {
    mz_jmp_buf * volatile save, newbuf;
    Scheme_Thread * volatile p;
    Scheme_Object *yh, *yha[1];
    p = scheme_get_current_thread();
    save = p->error_buf;
    p->error_buf = &newbuf;
    if (!scheme_setjmp(newbuf)) {
      yh = scheme_get_param(scheme_current_config(), MZCONFIG_EXE_YIELD_HANDLER);
      yha[0] = scheme_make_integer(exit_val);
      scheme_apply(yh, 1, yha);
    } else {
      scheme_clear_escape();
    }
    p->error_buf = save;
  }
#endif

  if (scheme_flush_managed(NULL, 1))
    exit_val = 1;

  return exit_val;
}

static Scheme_Object *reverse_path_list(Scheme_Object *l, int rel_to_cwd)
{
  Scheme_Object *r, *path;

  r = scheme_make_null();
  while (SCHEME_PAIRP(l)) {
    path = SCHEME_CAR(l);
    if (rel_to_cwd)
      path = scheme_path_to_complete_path(path, NULL);
    r = scheme_make_pair(path, r);
    l = SCHEME_CDR(l);
  }
  
  return r;
}   

#include <ctype.h>

static Scheme_Object *get_log_level(char *prog, char *real_switch, const char *envvar, const char *what, GC_CAN_IGNORE char *str)
{
  int k, len, default_lvl = -1;
  Scheme_Object *l, *last = NULL;
  GC_CAN_IGNORE char *s, *orig_str = str;

  l =  scheme_make_null();

  while (1) {
    while (*str && isspace(*((unsigned char *)str))) {
      str++;
    }

    if (!*str) {
      if (default_lvl == -1) default_lvl = 0;
      if (last)
        SCHEME_CDR(last) = scheme_make_integer(default_lvl);
      else
        l = scheme_make_integer(default_lvl);
      return l;
    }

    if (!strncmp(str, "none", 4)) {
      k = 0;
      len = 4;
    } else if (!strncmp(str, "fatal", 5)) {
      k = SCHEME_LOG_FATAL;
      len = 5;
    } else if (!strncmp(str, "error", 5)) {
      k = SCHEME_LOG_ERROR;
      len = 5;
    } else if (!strncmp(str, "warning", 7)) {
      k = SCHEME_LOG_WARNING;
      len = 7;
    } else if (!strncmp(str, "info", 4)) {
      k = SCHEME_LOG_INFO;
      len = 4;
    } else if (!strncmp(str, "debug", 5)) {
      k  = SCHEME_LOG_DEBUG;
      len = 5;
    } else {
      k = -1;
      len = 0;
    }

    str += len;

    if (k != -1) {
      if (*str == '@') {
        str++;
        for (s = str; *s && !isspace(*((unsigned char *)s)); s++) {
        }
        l = scheme_make_pair(scheme_make_sized_byte_string(str, s - str, 1), l);
        if (!last) last = l;
        l = scheme_make_pair(scheme_make_integer(k), l);
        str = s;
      } else if (isspace(*((unsigned char *)str)) || !*str) {
        if (default_lvl == -1)
          default_lvl = k;
        else
          k = -1;
      } else
        k = -1;
      if (*str) str++;
    }

    if (k == -1) {
      PRINTF("%s: %s <levels> %s%s%s must be one of the following\n"
             " <level>s:\n"
             "   none fatal error warning info debug\n"
             " or up to one such <level> in whitespace-separated sequence of\n"
             "   <level>@<name>\n"
             " given: %s\n",
             prog, what, 
             real_switch ? "after " : "in ",
             real_switch ? real_switch : envvar,
             real_switch ? " switch" : " environment variable",
             orig_str);
      return NULL;
    }
  }
}

static Scheme_Object *get_arg_log_level(char *prog, char *real_switch, const char *what, int argc, char **argv)
{
  if (argc < 2) {
    PRINTF("%s: missing %s level after %s switch\n", 
           prog, what, real_switch);
    return NULL;
  }

  return get_log_level(prog, real_switch, NULL, what, argv[1]);
}

static Scheme_Object *adjust_collects_path(Scheme_Object *collects_path, int *_skip_coll_dirs)
{
  /* Setup path for "collects" collection directory: */
  if (!collects_path) {
    GC_CAN_IGNORE char *coldir;
    coldir = extract_coldir();
    if (!coldir[0])
      collects_path = scheme_make_false();
    else
      collects_path = scheme_make_path(coldir);
  } else if (!SAME_OBJ(collects_path, scheme_make_false()))
    collects_path = scheme_path_to_complete_path(collects_path, NULL);

  if (SAME_OBJ(collects_path, scheme_make_false())) {
    /* empty list of directories => don't set collection dirs
       and don't use collection links files */
    if (_skip_coll_dirs) {
      *_skip_coll_dirs = 1;
      scheme_set_ignore_link_paths(1);
    }
    collects_path = scheme_make_path(".");
  }

  return collects_path;
}

static Scheme_Object *adjust_config_path(Scheme_Object *config_path)
{
  if (!config_path) {
    char *s;
    s = getenv("PLTCONFIGDIR");
    if (s) {
      s = scheme_expand_filename(s, -1, NULL, NULL, 0);
      if (s) config_path = scheme_make_path(s);
    }
  }

  if (!config_path)
    config_path = scheme_make_path(extract_configdir());
  else
    config_path = scheme_path_to_complete_path(config_path, NULL);

  return config_path;
}

#ifdef USE_OSKIT_CONSOLE
/* Hack to disable normal input mode: */
int osk_not_console = 0;
#endif

#ifndef MZ_XFORM
# ifndef GC_CAN_IGNORE
#  define GC_CAN_IGNORE /**/
# endif
#endif

static Scheme_Object *create_cmdline_args_vector(int argc, char *args[])
{
  int i;
  Scheme_Object *v;
  v = scheme_make_vector(argc, NULL);
  for (i = 0; i < argc; i++) {
    Scheme_Object *so;
    so = scheme_make_locale_string(args[i]);
    SCHEME_SET_CHAR_STRING_IMMUTABLE(so);
    SCHEME_VEC_ELS(v)[i] = so;
  }
  if (argc)
    SCHEME_SET_VECTOR_IMMUTABLE(v);
  return v;
}


static int run_from_cmd_line(int argc, char *_argv[], 
			     Scheme_Env *(*mk_basic_env)(void),
			     int (*cont_run)(FinishArgs *f))
{
  GC_CAN_IGNORE char **argv = _argv;
  Scheme_Env *global_env;
  char *prog, *sprog = NULL;
  Scheme_Object *sch_argv;
  int skip_coll_dirs = 0;
  Scheme_Object *collects_path = NULL, *collects_extra = NULL, *addon_dir = NULL;
  Scheme_Object *config_path = NULL;
  Scheme_Object *host_collects_path = NULL, *host_config_path = NULL;
  char *compiled_paths = NULL;
  Scheme_Object *collects_paths_l, *collects_paths_r;
#ifndef DONT_PARSE_COMMAND_LINE
  char **evals_and_loads, *real_switch = NULL, specific_switch[2];
  int *eval_kind, num_enl;
  int no_more_switches = 0;
  int show_vers = 0;
  char *embedding_file;
#endif
#if !defined(DONT_RUN_REP) || !defined(DONT_PARSE_COMMAND_LINE)
  int use_repl = 0;
  int script_mode = 0;
#endif
#if !defined(DONT_LOAD_INIT_FILE) || !defined(DONT_PARSE_COMMAND_LINE)
  int no_init_file = 0;
#endif
#ifndef NO_YIELD_BEFORE_EXIT
  int add_yield = 1;
#endif
#ifdef CMDLINE_STDIO_FLAG
  int alternate_rep = 0;
  int no_front = 0;
  char *wm_class = NULL;
#endif
  char *init_lib = INITIAL_NAMESPACE_MODULE;
  int was_config_flag = 0, saw_nc_flag = 0;
  int no_compiled = 0;
  int init_ns = 0, no_init_ns = 0;
  int cross_compile = 0;
  Scheme_Object *syslog_level = NULL, *stderr_level = NULL, *stdout_level = NULL;
  FinishArgs *fa;
  FinishArgsAtoms *fa_a;
  self_exe_t self_exe;

  scheme_set_default_locale();

  prog = argv[0];
  argv++;
  --argc;

#ifdef NEED_CONSOLE_PRINTF
  console_printf = scheme_get_console_printf();
#endif

  self_exe = get_self_path(prog);

  extract_built_in_arguments(self_exe, &prog, &sprog, &argc, &argv);

#ifndef DONT_PARSE_COMMAND_LINE
  evals_and_loads = (char **)malloc(sizeof(char *) * argc);
  eval_kind = (int *)malloc(sizeof(int) * argc);
  num_enl = 0;

  while (!no_more_switches 
         && argc 
         && argv[0][0] == '-' 
         && argv[0][1]
         && !is_number_arg(argv[0] + 1)) {
    real_switch = argv[0];

    if (!strcmp("--help", argv[0]))
      argv[0] = "-h";
    else if (!strcmp("--eval", argv[0]))
      argv[0] = "-e";
    else if (!strcmp("--load", argv[0]))
      argv[0] = "-f";
    else if (!strcmp("--require", argv[0]))
      argv[0] = "-t";
    else if (!strcmp("--lib", argv[0]))
      argv[0] = "-l";
    else if (!strcmp("--script", argv[0]))
      argv[0] = "-r";
    else if (!strcmp("--require-script", argv[0]))
      argv[0] = "-u";
    else if (!strcmp("--main", argv[0]))
      argv[0] = "-m";
    else if (!strcmp("--name", argv[0]))
      argv[0] = "-N";
    else if (!strcmp("--exec", argv[0]))
      argv[0] = "-E";
    else if (!strcmp("--no-compiled", argv[0]))
      argv[0] = "-c";
    else if (!strcmp("--no-lib", argv[0]))
      argv[0] = "-n";
    else if (!strcmp("--no-user-path", argv[0]))
      argv[0] = "-U";
    else if (!strcmp("--version", argv[0]))
      argv[0] = "-v";
    else if (!strcmp("--no-init-file", argv[0]))
      argv[0] = "-q";
    else if (!strcmp("--no-jit", argv[0]))
      argv[0] = "-j";
    else if (!strcmp("--compile-any", argv[0]))
      argv[0] = "-M";
    else if (!strcmp("--no-delay", argv[0]))
      argv[0] = "-d";
    else if (!strcmp("--repl", argv[0]))
      argv[0] = "-i";
    else if (!strcmp("--binary", argv[0]))
      argv[0] = "-b";
    else if (!strcmp("--warn", argv[0]))
      argv[0] = "-W";
    else if (!strcmp("--syslog", argv[0]))
      argv[0] = "-L";
    else if (!strcmp("--collects", argv[0]))
      argv[0] = "-X";
    else if (!strcmp("--search", argv[0]))
      argv[0] = "-S";
    else if (!strcmp("--compiled", argv[0]))
      argv[0] = "-R";
    else if (!strcmp("--addon", argv[0]))
      argv[0] = "-A";
    else if (!strcmp("--config", argv[0]))
      argv[0] = "-G";
    else if (!strcmp("--cross", argv[0]))
      argv[0] = "-C";
# ifdef CMDLINE_STDIO_FLAG
    else if (!strcmp("--stdio", argv[0]))
      argv[0] = "-z";
    else if (!strcmp("--back", argv[0]))
      argv[0] = "-K";
    else if (!strcmp("--wm-class", argv[0]))
      argv[0] = "-J";
# endif
# ifndef NO_YIELD_BEFORE_EXIT
    else if (!strcmp("--no-yield", argv[0]))
      argv[0] = "-V";
# endif
    
    if (!argv[0][1] || (argv[0][1] == '-' && argv[0][2])) {
      specific_switch[0] = 0;
      goto bad_switch;
    } else {
      GC_CAN_IGNORE char *str;
      char *se;
      for (str = argv[0] + 1; *str; str++) {
	switch (*str) {
	case 'h':
	  goto show_help;
	  break;
	case 'e':
	  if (argc < 2) {
	    PRINTF("%s: missing expression after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  evals_and_loads[num_enl] = argv[0];
	  eval_kind[num_enl++] = mzcmd_EVAL;
          init_ns = 1;
	  break;
	case 'X':
	  if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
          if (!*(argv[0])) {
            /* #f => no collects path */
            collects_path = scheme_make_false();
          } else
            collects_path = check_make_path(prog, real_switch, argv[0]);
          was_config_flag = 1;
	  break;
	case 'G':
	  if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
          config_path = check_make_path(prog, real_switch, argv[0]);
          was_config_flag = 1;
	  break;
        case 'R':
          if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  compiled_paths = argv[0];
          was_config_flag = 1;
	  break;
	case 'A':
	  if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  addon_dir = check_make_path(prog, real_switch, argv[0]);
          was_config_flag = 1;
            break;
        case 'C':
          if (!cross_compile) {
            cross_compile = 1;
            scheme_set_cross_compile_mode(1);
            was_config_flag = 1;
            host_config_path = config_path;
            host_collects_path = collects_path;
          }
	  break;
	case 'U':
	  scheme_set_ignore_user_paths(1);
          was_config_flag = 1;
	  break;
        case 'I':
          if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  init_lib = argv[0];
          was_config_flag = 1;
          break;
	case 'S':
	  if (argc < 2) {
	    PRINTF("%s: missing path after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  if (!collects_extra)
	    collects_extra = scheme_make_null();
          collects_extra = scheme_make_pair(check_make_path(prog, real_switch, argv[0]), collects_extra);
          was_config_flag = 1;
	  break;
        case 'c':
          no_compiled = 1;
          was_config_flag = 1;
          break;
	case 'm':
          evals_and_loads[num_enl] = "";
          eval_kind[num_enl++] = mzcmd_MAIN;
          init_ns = 1;
	  break;
	case 'r':
	  script_mode = 1;
	  no_more_switches = 1;
          if (argc > 1)
            sprog = argv[1];
	case 'f':
	  if (argc < 2) {
	    PRINTF("%s: missing file name after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  evals_and_loads[num_enl] = argv[0];
	  eval_kind[num_enl++] = mzcmd_LOAD;
          init_ns = 1;
	  break;
	case 'u':
	  script_mode = 1;
	  no_more_switches = 1;
          if (argc > 1)
            sprog = argv[1];
	case 't':
	  if (argc < 2) {
	    PRINTF("%s: missing file name after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  evals_and_loads[num_enl] = argv[0];
	  eval_kind[num_enl++] = mzcmd_REQUIRE_FILE;
          if (!init_ns)
            no_init_ns = 1;
	  break;
	case 'l':
	  if (argc < 2) {
	    PRINTF("%s: missing library name after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  evals_and_loads[num_enl] = argv[0];
	  eval_kind[num_enl++] = mzcmd_REQUIRE_LIB;
          if (!init_ns)
            no_init_ns = 1;
	  break;
	case 'p':
	  if (argc < 2) {
	    PRINTF("%s: missing package name after %s switch\n", 
		   prog, real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  evals_and_loads[num_enl] = argv[0];
	  eval_kind[num_enl++] = mzcmd_REQUIRE_PLANET;
          if (!init_ns)
            no_init_ns = 1;
	  break;
        case 'k':
        case 'Y':
          if (*str == 'Y') {
            if (argc < 2) {
              PRINTF("%s: missing file name after %s switch\n", 
                     prog, real_switch);
              goto show_need_help;
            }
            argv++;
            --argc;
            embedding_file = argv[0];
          } else
            embedding_file = NULL;
	  if (argc < 4) {
	    PRINTF("%s: missing %s after %s switch\n", 
		   prog, 
		   (argc < 2) ? "starting and ending offsets" : "second ending offset",
		   real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
	  se = make_embedded_load(self_exe, embedding_file, argv[0], argv[1]);
	  evals_and_loads[num_enl] = se;
	  argv++;
	  --argc;
	  eval_kind[num_enl++] = mzcmd_EMBEDDED_REG;
	  se = make_embedded_load(self_exe, embedding_file, argv[0], argv[1]);
	  evals_and_loads[num_enl] = se;
	  argv++;
	  --argc;
	  eval_kind[num_enl++] = mzcmd_EMBEDDED;
	  break;
	case 'N':
	case 'E':
	  if (argc < 2) {
	    PRINTF("%s: missing name after %s switch\n", 
		   prog, 
		   real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
          if (!*(argv[0])) {
            PRINTF("%s: empty path after %s switch\n", 
		   prog, 
		   real_switch);
	    goto show_need_help;
          }
          if (*str == 'N')
            sprog = argv[0];
          else
            prog = argv[0];
          was_config_flag = 1;
	  break;
	case 'q':
	  no_init_file = 1;
          was_config_flag = 1;
	  break;
        case 'n':
          no_init_ns = 1;
          break;
	case 'v':
	  show_vers = 1;
	  break;
#ifndef NO_YIELD_BEFORE_EXIT
	case 'V':
	  show_vers = 1;
	  add_yield = 0;
	  break;
#endif
	case 'i':
	  use_repl = 1;
          init_ns = 1;
	  break;
	case '-':
	  no_more_switches = 1;
          was_config_flag = 1;
	  break;
	case 'j':
	  scheme_set_startup_use_jit(0);
          was_config_flag = 1;
	  break;
	case 'M':
	  scheme_set_startup_compile_machine_independent(1);
          was_config_flag = 1;
	  break;
	case 'd':
	  scheme_set_startup_load_on_demand(0);
          was_config_flag = 1;
	  break;
	case 'b':
	  scheme_set_binary_mode_stdio(1);
          was_config_flag = 1;
	  break;
#ifdef CMDLINE_STDIO_FLAG
       	case 'z':
	  alternate_rep = 1;
	  no_front = 1;
          was_config_flag = 1;
	  break;
	case 'K':
	  no_front = 1;
          was_config_flag = 1;
	  break;
        case 'J':
          if (argc < 2) {
	    PRINTF("%s: missing name after %s switch\n", 
		   prog, 
		   real_switch);
	    goto show_need_help;
	  }
	  argv++;
	  --argc;
          wm_class = argv[0];
          was_config_flag = 1;
          break;
#endif
#ifdef USE_OSKIT_CONSOLE
	case 'S':
	  osk_not_console = 1;
	  break;
#endif
        case 'W':
          stderr_level = get_arg_log_level(prog, real_switch, "stderr", argc, argv);
          if (!stderr_level)
            goto show_need_help;
          --argc;
          argv++;
          was_config_flag = 1;
          break;
        case 'O':
          stdout_level = get_arg_log_level(prog, real_switch, "stdout", argc, argv);
          if (!stdout_level)
            goto show_need_help;
          --argc;
          argv++;
          was_config_flag = 1;
          break;
	case 'L':
          syslog_level = get_arg_log_level(prog, real_switch, "syslog", argc, argv);
          if (!syslog_level)
            goto show_need_help;
          --argc;
          argv++;
          was_config_flag = 1;
          break;
        case 'Z':
          if (argc < 2) {
	    PRINTF("%s: missing argument to ignore after %s switch\n", 
		   prog, 
		   real_switch);
	    goto show_need_help;
	  }
          --argc;
          argv++;
          was_config_flag = 1;
          break;
	default:
          specific_switch[0] = *str;
          specific_switch[1] = 0;
	  goto bad_switch;
	}

        if (was_config_flag)
          was_config_flag = 0;
        else
          saw_nc_flag = 1;
      }
      argv++;
      --argc;
    }
  }

  if (!saw_nc_flag) {
    if (!argc) {
      /* No args => repl */
      use_repl = 1;
      init_ns = 1;
    } else {
      /* No switches => -u mode */
      script_mode = 1;
      sprog = argv[0];
      evals_and_loads[num_enl] = argv[0];
      eval_kind[num_enl++] = mzcmd_REQUIRE_FILE;
      argv++;
      --argc;
    }
  }

  if (use_repl) {
    show_vers = 1;
  }

  if (no_init_ns)
    init_ns = 0;

  if (show_vers) {
#ifndef RACKET_CMD_LINE  
    if (!use_repl
#ifdef CMDLINE_STDIO_FLAG
	|| alternate_rep
#endif
	)
#endif
      PRINTF("%s", BANNER);

   CMDLINE_FFLUSH(stdout);
  }
#endif /* DONT_PARSE_COMMAND_LINE */

  if (!syslog_level) {
    char *s;
    s = getenv("PLTSYSLOG");
    if (s) {
      syslog_level = get_log_level(prog, NULL, "PLTSYSLOG", "syslog", s);
    }
  }
  if (!stderr_level) {
    char *s;
    s = getenv("PLTSTDERR");
    if (s) {
      stderr_level = get_log_level(prog, NULL, "PLTSTDERR", "stderr", s);
    }
  }
  if (!stdout_level) {
    char *s;
    s = getenv("PLTSTDOUT");
    if (s) {
      stdout_level = get_log_level(prog, NULL, "PLTSTDOUT", "stdout", s);
    }
  }
  if (getenv("PLTDISABLEGC")) {
    scheme_enable_garbage_collection(0);
  }
  {
    char *s;
    s = getenv("PLT_INCREMENTAL_GC");
    if (s) {
      if ((s[0] == '0') || (s[0] == 'n') || (s[0] == 'N'))
        scheme_incremental_garbage_collection(0);
      else if ((s[0] == '1') || (s[0] == 'y') || (s[0] == 'Y'))
        scheme_incremental_garbage_collection(1);
      else {
        PRINTF("%s: unrecognized value for PLT_INCREMENTAL_GC;\n"
                " a value that starts \"1\", \"y\", or \"Y\" permanently enables incremental mode,\n"
                " and a value that starts \"0\", \"n\", or \"N\" disables incremental mode,\n"
                " and the default enables incremental mode as requested via `collect-garbage'\n"
                "  unrecognized value: %s\n",
                prog, s);
      }
    }
  }
  {
    char *s;
    s = getenv("PLT_COMPILED_FILE_CHECK");
    if (s) {
      if (!strcmp(s, "modify-seconds"))
        scheme_set_compiled_file_check(SCHEME_COMPILED_FILE_CHECK_MODIFY_SECONDS);
      else if (!strcmp(s, "exists"))
        scheme_set_compiled_file_check(SCHEME_COMPILED_FILE_CHECK_EXISTS);
      else {
        PRINTF("%s: unrecognized value for PLT_COMPILED_FILE_CHECK;\n"
                " recognized values are \"modify-seconds\" and \"exists\"\n"
                "  unrecognized value: %s\n",
                prog, s);
      }
    }
  }

  if (getenv("PLT_COMPILE_ANY")) {
    scheme_set_startup_compile_machine_independent(1);
  }

  scheme_set_logging2_spec(syslog_level, stderr_level, stdout_level);

  collects_path = adjust_collects_path(collects_path, &skip_coll_dirs);
  scheme_set_collects_path(collects_path);

  if (cross_compile) {
    host_collects_path = adjust_collects_path(host_collects_path, NULL);
    scheme_set_host_collects_path(host_collects_path);
  }

  config_path = adjust_config_path(config_path);
  scheme_set_config_path(config_path);

  if (cross_compile) {
    host_config_path = adjust_config_path(host_config_path);
    scheme_set_host_config_path(host_config_path);
  }

  /* Make list of additional collection paths: */
  if (collects_extra)
    collects_paths_r = reverse_path_list(collects_extra, 1);
  else
    collects_paths_r = scheme_make_null();
  
  {
    int len, offset;
    GC_CAN_IGNORE char *coldir;
    collects_paths_l = scheme_make_null();
    coldir = extract_coldir();
    offset = 0;
    while (1) {
      len = strlen(coldir XFORM_OK_PLUS offset);
      offset += len + 1;
      if (!coldir[offset])
        break;
      collects_paths_l = scheme_make_pair(scheme_make_path(coldir XFORM_OK_PLUS offset), 
                                          collects_paths_l);
    }
    collects_paths_l = reverse_path_list(collects_paths_l, 0);
  }

  sch_argv = create_cmdline_args_vector(argc, argv);
  scheme_set_command_line_arguments(sch_argv);
  
  scheme_set_exec_cmd(prog);
  if (!sprog)
    sprog = prog;
  
  (void)scheme_set_run_cmd(sprog);
#ifdef CAN_SET_OS_PROCESS_NAME
  set_os_process_name(sprog);
#endif
  
  if (no_compiled)
    scheme_set_compiled_file_paths(scheme_make_null());
  else {
    const char *s;
    s = getenv("PLT_ZO_PATH");
    if (s)
      scheme_set_compiled_file_paths(scheme_make_pair(scheme_make_path(s),
                                                      scheme_make_null()));
#ifdef COMPILED_PATH_AS_BC
    else {
# ifdef DOS_FILE_SYSTEM
      s = "compiled\\bc";
# else
      s = "compiled/bc";
# endif
      scheme_set_compiled_file_paths(scheme_make_pair(scheme_make_path(s),
                                                      scheme_make_null()));
    }
#endif
  }

  /* Setup compiled-file search path: */
  if (!compiled_paths) {
    compiled_paths = getenv("PLTCOMPILEDROOTS");
  }

  /* Setup path for "addon" directory: */
  if (!addon_dir) {
    char *s;
    s = getenv("PLTADDONDIR");
    if (s) {
      s = scheme_expand_filename(s, -1, NULL, NULL, 0);
      if (s) addon_dir = scheme_make_path(s);
    }
  }
  if (addon_dir) {
    addon_dir = scheme_path_to_complete_path(addon_dir, NULL);
    scheme_set_addon_dir(addon_dir);
  }

  /* Creates the main kernel environment */
  global_env = mk_basic_env();

  if (!skip_coll_dirs)
    scheme_init_collection_paths_post(global_env, collects_paths_l, collects_paths_r);
  scheme_init_compiled_roots(global_env, compiled_paths);

  scheme_seal_parameters();

  fa_a = (FinishArgsAtoms *)scheme_malloc_atomic(sizeof(FinishArgsAtoms));
  fa = (FinishArgs *)scheme_malloc(sizeof(FinishArgs));
  fa->a = fa_a;
  fa->a->init_ns = init_ns;
#ifndef DONT_PARSE_COMMAND_LINE
  fa->evals_and_loads = evals_and_loads;
  fa->eval_kind = eval_kind;
  fa->a->num_enl = num_enl;
  fa->main_args = sch_argv;
#endif  
#ifndef DONT_LOAD_INIT_FILE
  fa->a->no_init_file = no_init_file;
#endif
#ifndef DONT_RUN_REP
  fa->a->use_repl = use_repl;
  fa->a->script_mode = script_mode;
#endif
#ifndef NO_YIELD_BEFORE_EXIT
  fa->a->add_yield = add_yield;
#endif
#ifdef CMDLINE_STDIO_FLAG
  fa->a->alternate_rep = alternate_rep;
  fa->a->no_front = no_front;
  if (no_front)
    scheme_register_process_global("Racket-GUI-no-front", (void *)0x1);
  if (wm_class)
    scheme_register_process_global("Racket-GUI-wm-class", (void *)wm_class);
#endif
  fa->init_lib = init_lib;
  fa->global_env = global_env;

  scheme_set_can_break(1);

  return cont_run(fa);

#ifndef DONT_PARSE_COMMAND_LINE
 show_help:
  prog = (char *) ("%s"
         PROGRAM_LC " [<option> ...] <argument> ...\n"
# ifndef RACKET_CMD_LINE
#  ifdef wx_x
  "\n"
  "X configuration options (must precede all other options):\n\n"
  "  -display <display>, -geometry <geometry>, -fn <font>,\n"
  "  -font <font>, -bg <color>, -background <color>, -fg <color>,\n"
  "  -foreground <color>, -iconic, -name <name>, -rv, -reverse,\n"
  "  +rv, -selectionTimeout <timeout>, -synchronous, -title <title>,\n"
  "  -xnllanguage <language>, -xrm <file>\n"
#  endif
# endif
  "\n"
  "File and expression options:\n\n"
  "  -e <exprs>, --eval <exprs>\n"
  "     Evaluate <exprs>, print results\n"
  "  -f <file>, --load <file>\n"
  "     Like -e '(load \"<file>\")' without printing\n"
  "  -t <file>, --require <file>\n"
  "     Like -e '(require (file \"<file>\"))' [*]\n"
  "  -l <path>, --lib <path>\n"
  "     Like -e '(require (lib \"<path>\"))' [*]\n"
  "  -p <package>\n"
  "     Like -e '(require (planet \"<package>\")' [*]\n"
  "  -r <file>, --script <file>\n"
  "     Same as -f <file> -N <file> --\n"
  "  -u <file>, --require-script <file>\n"
  "     Same as -t <file> -N <file> --\n"
  "  -k <n> <m> <p>\n"
  "     Load executable-embedded code from offset <n> to <p>\n"
  "  -Y <file> <n> <m> <p>\n"
  "     Like -k <n> <m> <p>, but from <file>\n"
  "  -m, --main\n"
  "     Call `main` with command-line arguments, print results\n"
  "\n"
  " [*] Also `require`s a `main` submodule, if any\n"
  "\n"
  "Interaction options:\n\n"
  "  -i, --repl\n"
  "     Run interactive read-eval-print loop; implies -v\n"
  "  -n, --no-lib\n"
  "     Skip `(require (lib \"<init-lib>\"))` for -i/-e/-f/-r\n"
  "  -v, --version\n"
  "     Show version\n"
# ifdef CMDLINE_STDIO_FLAG
  "  -K, --back\n"
  "     Don't bring application to the foreground (Mac OS X)\n"
# endif
# ifndef NO_YIELD_BEFORE_EXIT
  "  -V, --no-yield\n"
  "     Skip `((executable-yield-handler) <status>)` on exit\n"
# endif
  "\n"
  "Configuration options:\n\n"
  "  -c, --no-compiled\n"
  "     Disable loading of compiled files\n"
  "  -q, --no-init-file\n"
  "     Skip load of " INIT_FILENAME " for -i\n"
# ifdef CMDLINE_STDIO_FLAG
  "  -z, --text-repl\n"
  "     Use text `read-eval-print-loop` for -i\n"
# endif
  "  -I <path>\n"
  "     Set <init-lib> to <path> (sets language)\n"
  "  -X <dir>, --collects <dir>\n"
  "     Main collects at <dir> (or \"\" disables all)\n"
  "  -S <dir>, --search <dir>\n"
  "     More collects at <dir> (after main collects)\n"
  "  -G <dir>, --config <dir>\n"
  "     Main configuration directory at <dir>\n"
  "  -A <dir>, --addon <dir>\n"
  "     Addon directory at <dir>\n"
  "  -U, --no-user-path\n"
  "     Ignore user-specific collects, etc.\n"
  "  -R <paths>, --compiled <paths>\n"
  "     Set compiled-file search roots to <paths>\n"
  "  -C, --cross\n"
  "     Cross-build mode; save current collects and config\n"
  "     as host\n"
  "  -N <file>, --name <file>\n"
  "     Sets `(find-system-path 'run-file)` to <file>\n"
  "  -E <file>, --exec <file>\n"
  "     Sets `(find-system-path 'exec-file)` to <file>\n"
# ifdef CMDLINE_STDIO_FLAG
  "  -J <name>, ---wm-class <name>\n"
  "     Set WM_CLASS class to <name> (Unix)\n"
# endif
# ifdef MZ_USE_JIT
  "  -j, --no-jit\n"
  "     Disable the just-in-time compiler\n"
# else
  "  -j, --no-jit\n"
  "     No effect, since the just-in-time compiler is unavailable\n"
# endif
  "  -M, --compile-any\n"
  "     Compile to machine-independent form\n"
  "  -d, --no-delay\n"
  "     Disable on-demand loading of syntax and code\n"
  "  -b, --binary\n"
  "     No effect, since stdin and stdout/stderr are\n"
  "     always binary\n"
  "  -W <levels>, --warn <levels>\n"
  "     Set stderr logging to <levels>\n"
  "  -O <levels>, --stdout <levels>\n"
  "     Set stdout logging to <levels>\n"
  "  -L <levels>, --syslog <levels>\n"
  "     Set syslog logging to <levels>\n"
  "\n"
  "Meta options:\n\n"
  "  --\n"
  "     No argument following this switch is used as a switch\n"
  "  -Z\n"
  "     Ignore the argument following this switch\n"
  "  -h, --help\n"
  "     Show this information and exits, ignoring other options\n"
  "\n"
  "Default options:\n\n"
  "  * If only configuration options are provided, -i is added\n"
  "  * If only configuration options are before the first\n"
  "    argument, -u is added\n"
  "  * If -t/-l/-p/-u appears before the first -i/-e/-f/-r,\n"
  "    -n is added\n"
  "  * <init-lib> defaults to " INITIAL_NAMESPACE_MODULE "\n"
  "\n"
  "Switch syntax:\n\n"
  "  Multiple single-letter switches can be collapsed, with\n"
  "  arguments placed after the collapsed switches; the first\n"
  "  collapsed switch cannot be --\n\n"
  "  For example,\n"
  "\n"
  "      -ifve file expr\n"
  "\n"
  "  is the same as\n"
  "\n"
  "      -i -f file -v -e expr\n"
  "\n"
  "Start-up sequence:\n\n"
  "  1. Set `current-library-collection-paths`\n"
  "  2. Require `(lib \"<init-lib>\")` [when -i/-e/-f/-r, unless -n]\n"
  "  3. Evaluate/load expressions/files in order, until first error\n"
  "  4. Load \"" INIT_FILENAME "\" [when -i]\n"
  "  5. Run read-eval-print loop [when -i]\n"
# ifndef NO_YIELD_BEFORE_EXIT
  "  6. Run `((executable-yield-handler) <status>)` [unless -V]\n"
# endif
  );
  PRINTF(prog, BANNER);
#if defined(WINDOWS_FILE_HANDLES)
  CMDLINE_FFLUSH(stdout);
#endif
  return 0;
 bad_switch:
  if (specific_switch[0] && real_switch[2]) {
    PRINTF("%s: bad switch: -%s within: %s\n", prog, specific_switch, real_switch);
  } else {
    PRINTF("%s: bad switch: %s\n", prog, real_switch);
  }
 show_need_help:
  PRINTF("Use the --help or -h flag for help.\n");
#if defined(DETECT_WIN32_CONSOLE_STDIN)
  CMDLINE_FFLUSH(stdout);
#endif
  return 1;
#endif
}

#if defined(OS_X) && defined(MZ_PRECISE_GC) && defined(EXTRA_EXCEPTION_STUBS)

/* These declarations avoid linker problems when using
   -mmacosx-version-min. See gc2/vm_osx.c for details. */

START_XFORM_SKIP;

#include <mach/mach.h>
#include <mach/mach_error.h>

# ifdef __cplusplus
extern "C" {
# endif

extern kern_return_t GC_catch_exception_raise_state(mach_port_t port,
                                                    exception_type_t exception_type,
                                                    exception_data_t exception_data,
                                                    mach_msg_type_number_t data_cnt,
                                                    thread_state_flavor_t *flavor,
                                                    thread_state_t in_state,
                                                    mach_msg_type_number_t is_cnt,
                                                    thread_state_t out_state,
                                                    mach_msg_type_number_t os_cnt);
extern kern_return_t GC_catch_exception_raise_state_identitity
  (mach_port_t port,  mach_port_t thread_port, mach_port_t task_port,
   exception_type_t exception_type, exception_data_t exception_data,
   mach_msg_type_number_t data_count, thread_state_flavor_t *state_flavor,
   thread_state_t in_state, mach_msg_type_number_t in_state_count,
   thread_state_t out_state, mach_msg_type_number_t out_state_count);
extern kern_return_t GC_catch_exception_raise(mach_port_t port,
                                              mach_port_t thread_port,
                                              mach_port_t task_port,
                                              exception_type_t exception_type,
                                              exception_data_t exception_data,
                                              mach_msg_type_number_t data_count);

kern_return_t catch_exception_raise_state(mach_port_t port,
					  exception_type_t exception_type,
					  exception_data_t exception_data,
					  mach_msg_type_number_t data_cnt,
					  thread_state_flavor_t *flavor,
					  thread_state_t in_state,
					  mach_msg_type_number_t is_cnt,
					  thread_state_t out_state,
					  mach_msg_type_number_t os_cnt)
{
  return GC_catch_exception_raise_state(port, exception_type, exception_data,
                                        data_cnt, flavor,
                                        in_state, is_cnt,
                                        out_state, os_cnt);
}

kern_return_t catch_exception_raise_state_identitity
  (mach_port_t port,  mach_port_t thread_port, mach_port_t task_port,
   exception_type_t exception_type, exception_data_t exception_data,
   mach_msg_type_number_t data_count, thread_state_flavor_t *state_flavor,
   thread_state_t in_state, mach_msg_type_number_t in_state_count,
   thread_state_t out_state, mach_msg_type_number_t out_state_count)
{
  return GC_catch_exception_raise_state_identitity(port, thread_port, task_port,
                                                   exception_type, exception_data,
                                                   data_count, state_flavor,
                                                   in_state, in_state_count,
                                                   out_state, out_state_count);
}

kern_return_t catch_exception_raise(mach_port_t port,
				    mach_port_t thread_port,
				    mach_port_t task_port,
				    exception_type_t exception_type,
				    exception_data_t exception_data,
				    mach_msg_type_number_t data_count)
{
  return GC_catch_exception_raise(port, thread_port, task_port,
                                  exception_type, exception_data, data_count);
}

# ifdef __cplusplus
};
# endif
END_XFORM_SKIP;
#endif