[deliverable/binutils-gdb.git] / gold / options.cc

// options.c -- handle command line options for gold

#include <iostream>

#include "gold.h"
#include "options.h"

namespace gold
{

// The information we keep for a single command line option.

struct options::One_option
{
  // The single character option name, or '\0' if this is only a long
  // option.
  char short_option;

  // The long option name, or NULL if this is only a short option.
  const char* long_option;

  // Description of the option for --help output, or NULL if there is none.
  const char* doc;

  // How to print the option name in --help output, or NULL to use the
  // default.
  const char* help_output;

  // Long option dash control.  This is ignored if long_option is
  // NULL.
  enum
    {
      // Long option normally takes one dash; two dashes are also
      // accepted.
      ONE_DASH,
      // Long option normally takes two dashes; one dash is also
      // accepted.
      TWO_DASHES,
      // Long option always takes two dashes.
      EXACTLY_TWO_DASHES
    } dash;

  // Function for special handling, or NULL.  Returns the number of
  // arguments to skip.  This will normally be at least 1, but it may
  // be 0 if this function changes *argv.  ARG points to the location
  // in *ARGV where the option starts, which may be helpful for a
  // short option.
  int (*special)(int argc, char** argv, char *arg, Command_line*);

  // If this is a position independent option which does not take an
  // argument, this is the member function to call to record it.
  void (General_options::*general_noarg)();

  // If this is a position independent function which takes an
  // argument, this is the member function to call to record it.
  void (General_options::*general_arg)(const char*);

  // If this is a position dependent option which does not take an
  // argument, this is the member function to call to record it.
  void (Position_dependent_options::*dependent_noarg)();

  // If this is a position dependent option which takes an argument,
  // this is the member function to record it.
  void (Position_dependent_options::*dependent_arg)(const char*);

  // Return whether this option takes an argument.
  bool
  takes_argument() const
  { return this->general_arg != NULL || this->dependent_arg != NULL; }
};

class options::Command_line_options
{
 public:
  static const One_option options[];
  static const int options_size;
};

} // End namespace gold.

namespace
{

// Handle the special -l option, which adds an input file.

int
library(int argc, char** argv, char* arg, gold::Command_line* cmdline)
{
  return cmdline->process_l_option(argc, argv, arg);
}

// Handle the special --start-group option.

int
start_group(int, char**, char* arg, gold::Command_line* cmdline)
{
  cmdline->start_group(arg);
  return 1;
}

// Handle the special --end-group option.

int
end_group(int, char**, char* arg, gold::Command_line* cmdline)
{
  cmdline->end_group(arg);
  return 1;
}

// Report usage information for ld --help, and exit.

int
help(int, char**, char*, gold::Command_line*)
{
  printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);

  const int options_size = gold::options::Command_line_options::options_size;
  const gold::options::One_option* options =
    gold::options::Command_line_options::options;
  for (int i = 0; i < options_size; ++i)
    {
      if (options[i].doc == NULL)
	continue;

      printf("  ");
      int len = 2;
      bool comma = false;

      int j = i;
      do
	{
	  if (options[j].help_output != NULL)
	    {
	      if (comma)
		{
		  printf(", ");
		  len += 2;
		}
	      printf(options[j].help_output);
	      len += std::strlen(options[i].help_output);
	    }
	  else
	    {
	      if (options[j].short_option != '\0')
		{
		  if (comma)
		    {
		      printf(", ");
		      len += 2;
		    }
		  printf("-%c", options[j].short_option);
		  len += 2;
		}

	      if (options[j].long_option != NULL)
		{
		  if (comma)
		    {
		      printf(", ");
		      len += 2;
		    }
		  if (options[j].dash == gold::options::One_option::ONE_DASH)
		    {
		      printf("-");
		      ++len;
		    }
		  else
		    {
		      printf("--");
		      len += 2;
		    }
		  printf("%s", options[j].long_option);
		  len += std::strlen(options[j].long_option);
		}
	    }
	  ++j;
	}
      while (j < options_size && options[j].doc == NULL);

      if (len > 30)
	{
	  printf("\n");
	  len = 0;
	}
      for (; len < 30; ++len)
	std::putchar(' ');

      std::puts(options[i].doc);
    }

  gold::gold_exit(true);

  return 0;
}

} // End anonymous namespace.

namespace gold
{

// Helper macros used to specify the options.  We could also do this
// using constructors, but then g++ would generate code to initialize
// the array.  We want the array to be initialized statically so that
// we get better startup time.

#define GENERAL_NOARG(short_option, long_option, doc, help, dash, func)	\
  { short_option, long_option, doc, help, options::One_option::dash, \
      NULL, func, NULL, NULL, NULL }
#define GENERAL_ARG(short_option, long_option, doc, help, dash, func)	\
  { short_option, long_option, doc, help, options::One_option::dash, \
      NULL, NULL, func, NULL, NULL }
#define POSDEP_NOARG(short_option, long_option, doc, help, dash, func)	\
  { short_option, long_option, doc, help, options::One_option::dash, \
      NULL,  NULL, NULL, func, NULL }
#define POSDEP_ARG(short_option, long_option, doc, help, dash, func)	\
  { short_option, long_option, doc, help, options::One_option::dash, \
      NULL, NULL, NULL, NULL, func }
#define SPECIAL(short_option, long_option, doc, help, dash, func)	\
  { short_option, long_option, doc, help, options::One_option::dash, \
      func, NULL, NULL, NULL, NULL }

// Here is the actual list of options which we accept.

const options::One_option
options::Command_line_options::options[] =
{
  SPECIAL('l', "library", N_("Search for library LIBNAME"),
	  N_("-lLIBNAME --library LIBNAME"), TWO_DASHES,
	  &library),
  SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
	  TWO_DASHES, &start_group),
  SPECIAL(')', "end-group", N_("End a library search group"), NULL,
	  TWO_DASHES, &end_group),
  GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
	      N_("-L DIR, --library-path DIR"), TWO_DASHES,
	      &General_options::add_to_search_path),
  GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
	      &General_options::ignore),
  GENERAL_ARG('o', "output", N_("Set output file name"),
	      N_("-o FILE, --output FILE"), TWO_DASHES,
	      &General_options::set_output_file_name),
  GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
		ONE_DASH, &General_options::set_relocatable),
  GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
		NULL, ONE_DASH, &General_options::set_shared),
  GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
		NULL, ONE_DASH, &General_options::set_static),
  SPECIAL('\0', "help", N_("Report usage information"), NULL,
	  TWO_DASHES, &help)
};

const int options::Command_line_options::options_size =
  sizeof (options) / sizeof (options[0]);

// The default values for the general options.

General_options::General_options()
  : search_path_(),
    output_file_name_("a.out"),
    is_relocatable_(false),
    is_shared_(false),
    is_static_(false)
{
}

// The default values for the position dependent options.

Position_dependent_options::Position_dependent_options()
  : do_static_search_(false)
{
}

// Command_line options.

Command_line::Command_line()
  : options_(), position_options_(), inputs_(), in_group_(false)
{
}

// Process the command line options.

void
Command_line::process(int argc, char** argv)
{
  const int options_size = options::Command_line_options::options_size;
  const options::One_option* options =
    options::Command_line_options::options;
  bool no_more_options = false;
  int i = 0;
  while (i < argc)
    {
      if (argv[i][0] != '-' || no_more_options)
	{
	  this->add_file(argv[i], false);
	  ++i;
	  continue;
	}

      // Option starting with '-'.
      int dashes = 1;
      if (argv[i][1] == '-')
	{
	  dashes = 2;
	  if (argv[i][2] == '\0')
	    {
	      no_more_options = true;
	      continue;
	    }
	}

      // Look for a long option match.
      char* opt = argv[i] + dashes;
      char first = opt[0];
      int skiparg = 0;
      char* arg = strchr(opt, '=');
      if (arg != NULL)
	*arg = '\0';
      else if (i + 1 < argc)
	{
	  arg = argv[i + 1];
	  skiparg = 1;
	}

      int j;
      for (j = 0; j < options_size; ++j)
	{
	  if (options[j].long_option != NULL
	      && (dashes == 2
		  || (options[j].dash
		      != options::One_option::EXACTLY_TWO_DASHES))
	      && first == options[j].long_option[0]
	      && strcmp(opt, options[j].long_option) == 0)
	    {
	      if (options[j].special)
		i += options[j].special(argc - 1, argv + i, opt, this);
	      else
		{
		  if (!options[j].takes_argument())
		    {
		      arg = NULL;
		      skiparg = 0;
		    }
		  else
		    {
		      if (arg == NULL)
			this->usage(_("missing argument"), argv[i]);
		    }
		  this->apply_option(options[j], arg);
		  i += skiparg + 1;
		}
	      break;
	    }
	}
      if (j < options_size)
	continue;

      // If we saw two dashes, we need to see a long option.
      if (dashes == 2)
	this->usage(_("unknown option"), argv[i]);

      // Look for a short option match.  There may be more than one
      // short option in a given argument.
      bool done = false;
      char* s = argv[i] + 1;
      ++i;
      while (*s != '\0' && !done)
	{
	  char opt = *s;
	  int j;
	  for (j = 0; j < options_size; ++j)
	    {
	      if (options[j].short_option == opt)
		{
		  if (options[j].special)
		    {
		      // Undo the argument skip done above.
		      --i;
		      i += options[j].special(argc - i, argv + i, s, this);
		      done = true;
		    }
		  else
		    {
		      arg = NULL;
		      if (options[j].takes_argument())
			{
			  if (s[1] != '\0')
			    {
			      arg = s + 1;
			      done = true;
			    }
			  else if (i < argc)
			    {
			      arg = argv[i];
			      ++i;
			    }
			  else
			    this->usage(_("missing argument"), opt);
			}
		      this->apply_option(options[j], arg);
		    }
		  break;
		}
	    }

	  if (j >= options_size)
	    this->usage(_("unknown option"), *s);

	  ++s;
	}
    }

  if (this->in_group_)
    {
      fprintf(stderr, _("%s: missing group end"), program_name);
      this->usage();
    }

  // FIXME: We should only do this when configured in native mode.
  this->options_.add_to_search_path("/lib");
  this->options_.add_to_search_path("/usr/lib");
}

// Apply a command line option.

void
Command_line::apply_option(const options::One_option& opt,
			   const char* arg)
{
  if (arg == NULL)
    {
      if (opt.general_noarg)
	(this->options_.*(opt.general_noarg))();
      else if (opt.dependent_noarg)
	(this->position_options_.*(opt.dependent_noarg))();
      else
	gold_unreachable();
    }
  else
    {
      if (opt.general_arg)
	(this->options_.*(opt.general_arg))(arg);
      else if (opt.dependent_arg)
	(this->position_options_.*(opt.dependent_arg))(arg);
      else
	gold_unreachable();
    }
}

// Add an input file or library.

void
Command_line::add_file(const char* name, bool is_lib)
{
  Input_file_argument file(name, is_lib, this->position_options_);
  if (!this->in_group_)
    this->inputs_.push_back(Input_argument(file));
  else
    {
      assert(!this->inputs_.empty());
      assert(this->inputs_.back().is_group());
      this->inputs_.back().group()->add_file(file);
    }
}

// Handle the -l option, which requires special treatment.

int
Command_line::process_l_option(int argc, char** argv, char* arg)
{
  int ret;
  const char* libname;
  if (arg[1] != '\0')
    {
      ret = 1;
      libname = arg + 1;
    }
  else if (argc > 1)
    {
      ret = 2;
      libname = argv[argc + 1];
    }
  else
    this->usage(_("missing argument"), arg);

  this->add_file(libname, true);

  return ret;
}

// Handle the --start-group option.

void
Command_line::start_group(const char* arg)
{
  if (this->in_group_)
    this->usage(_("may not nest groups"), arg);

  // This object is leaked.
  Input_file_group* group = new Input_file_group();
  this->inputs_.push_back(Input_argument(group));

  this->in_group_ = true;
}

// Handle the --end-group option.

void
Command_line::end_group(const char* arg)
{
  if (!this->in_group_)
    this->usage(_("group end without group start"), arg);
  this->in_group_ = false;
}

// Report a usage error.  */

void
Command_line::usage()
{
  fprintf(stderr,
	  _("%s: use the --help option for usage information\n"),
	  program_name);
  gold_exit(false);
}

void
Command_line::usage(const char* msg, const char *opt)
{
  fprintf(stderr,
	  _("%s: %s: %s\n"),
	  program_name, opt, msg);
  this->usage();
}

void
Command_line::usage(const char* msg, char opt)
{
  fprintf(stderr,
	  _("%s: -%c: %s\n"),
	  program_name, opt, msg);
  this->usage();
}

} // End namespace gold.
Commit	Line	Data
bae7f79e ILT	1	// options.c -- handle command line options for gold
	2
	3	#include <iostream>
	4
	5	#include "gold.h"
	6	#include "options.h"
	7
61ba1cf9 ILT	8	namespace gold
	9	{
	10
bae7f79e ILT	11	// The information we keep for a single command line option.
bae7f79e ILT	12
61ba1cf9	13	struct options::One_option
bae7f79e ILT	14	{
	15	// The single character option name, or '\0' if this is only a long
	16	// option.
	17	char short_option;
	18
	19	// The long option name, or NULL if this is only a short option.
	20	const char* long_option;
	21
	22	// Description of the option for --help output, or NULL if there is none.
	23	const char* doc;
	24
	25	// How to print the option name in --help output, or NULL to use the
	26	// default.
	27	const char* help_output;
	28
	29	// Long option dash control. This is ignored if long_option is
	30	// NULL.
	31	enum
	32	{
	33	// Long option normally takes one dash; two dashes are also
	34	// accepted.
	35	ONE_DASH,
	36	// Long option normally takes two dashes; one dash is also
	37	// accepted.
	38	TWO_DASHES,
	39	// Long option always takes two dashes.
	40	EXACTLY_TWO_DASHES
	41	} dash;
	42
	43	// Function for special handling, or NULL. Returns the number of
	44	// arguments to skip. This will normally be at least 1, but it may
	45	// be 0 if this function changes *argv. ARG points to the location
	46	// in *ARGV where the option starts, which may be helpful for a
	47	// short option.
61ba1cf9	48	int (special)(int argc, char* argv, char arg, Command_line);
bae7f79e ILT	49
	50	// If this is a position independent option which does not take an
	51	// argument, this is the member function to call to record it.
61ba1cf9	52	void (General_options::*general_noarg)();
bae7f79e ILT	53
	54	// If this is a position independent function which takes an
	55	// argument, this is the member function to call to record it.
61ba1cf9	56	void (General_options::general_arg)(const char);
bae7f79e ILT	57
	58	// If this is a position dependent option which does not take an
	59	// argument, this is the member function to call to record it.
61ba1cf9	60	void (Position_dependent_options::*dependent_noarg)();
bae7f79e ILT	61
	62	// If this is a position dependent option which takes an argument,
	63	// this is the member function to record it.
61ba1cf9	64	void (Position_dependent_options::dependent_arg)(const char);
bae7f79e ILT	65
	66	// Return whether this option takes an argument.
	67	bool
	68	takes_argument() const
	69	{ return this->general_arg != NULL \|\| this->dependent_arg != NULL; }
	70	};
	71
61ba1cf9	72	class options::Command_line_options
bae7f79e ILT	73	{
	74	public:
	75	static const One_option options[];
	76	static const int options_size;
	77	};
	78
61ba1cf9 ILT	79	} // End namespace gold.
61ba1cf9 ILT	80
bae7f79e ILT	81	namespace
	82	{
	83
61ba1cf9 ILT	84	// Handle the special -l option, which adds an input file.
	85
	86	int
	87	library(int argc, char** argv, char* arg, gold::Command_line* cmdline)
	88	{
	89	return cmdline->process_l_option(argc, argv, arg);
	90	}
	91
ead1e424 ILT	92	// Handle the special --start-group option.
	93
	94	int
	95	start_group(int, char*, char arg, gold::Command_line* cmdline)
	96	{
	97	cmdline->start_group(arg);
	98	return 1;
	99	}
	100
	101	// Handle the special --end-group option.
	102
	103	int
	104	end_group(int, char*, char arg, gold::Command_line* cmdline)
	105	{
	106	cmdline->end_group(arg);
	107	return 1;
	108	}
	109
bae7f79e ILT	110	// Report usage information for ld --help, and exit.
	111
	112	int
	113	help(int, char*, char, gold::Command_line*)
	114	{
	115	printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
	116
	117	const int options_size = gold::options::Command_line_options::options_size;
	118	const gold::options::One_option* options =
	119	gold::options::Command_line_options::options;
	120	for (int i = 0; i < options_size; ++i)
	121	{
	122	if (options[i].doc == NULL)
	123	continue;
	124
	125	printf(" ");
	126	int len = 2;
	127	bool comma = false;
	128
	129	int j = i;
	130	do
	131	{
	132	if (options[j].help_output != NULL)
	133	{
	134	if (comma)
	135	{
	136	printf(", ");
	137	len += 2;
	138	}
	139	printf(options[j].help_output);
	140	len += std::strlen(options[i].help_output);
	141	}
	142	else
	143	{
	144	if (options[j].short_option != '\0')
	145	{
	146	if (comma)
	147	{
	148	printf(", ");
	149	len += 2;
	150	}
	151	printf("-%c", options[j].short_option);
	152	len += 2;
	153	}
	154
	155	if (options[j].long_option != NULL)
	156	{
	157	if (comma)
	158	{
	159	printf(", ");
	160	len += 2;
	161	}
	162	if (options[j].dash == gold::options::One_option::ONE_DASH)
	163	{
	164	printf("-");
	165	++len;
	166	}
	167	else
	168	{
	169	printf("--");
	170	len += 2;
	171	}
	172	printf("%s", options[j].long_option);
	173	len += std::strlen(options[j].long_option);
174	}
175	}
176	++j;
177	}
178	while (j < options_size && options[j].doc == NULL);
179
180	if (len > 30)
181	{
182	printf("\n");
183	len = 0;
184	}
185	for (; len < 30; ++len)
186	std::putchar(' ');
187
188	std::puts(options[i].doc);
189	}
190
191	gold::gold_exit(true);
192
193	return 0;
194	}
195
61ba1cf9 ILT	196	} // End anonymous namespace.
	197
	198	namespace gold
	199	{
bae7f79e ILT	200
	201	// Helper macros used to specify the options. We could also do this
	202	// using constructors, but then g++ would generate code to initialize
	203	// the array. We want the array to be initialized statically so that
	204	// we get better startup time.
	205
	206	#define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	207	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	208	NULL, func, NULL, NULL, NULL }
bae7f79e ILT	209	#define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	210	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	211	NULL, NULL, func, NULL, NULL }
bae7f79e ILT	212	#define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	213	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	214	NULL, NULL, NULL, func, NULL }
bae7f79e ILT	215	#define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	216	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	217	NULL, NULL, NULL, NULL, func }
bae7f79e ILT	218	#define SPECIAL(short_option, long_option, doc, help, dash, func) \
61ba1cf9	219	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	220	func, NULL, NULL, NULL, NULL }
	221
	222	// Here is the actual list of options which we accept.
	223
61ba1cf9 ILT	224	const options::One_option
61ba1cf9 ILT	225	options::Command_line_options::options[] =
bae7f79e	226	{
61ba1cf9 ILT	227	SPECIAL('l', "library", N_("Search for library LIBNAME"),
	228	N_("-lLIBNAME --library LIBNAME"), TWO_DASHES,
	229	&library),
ead1e424 ILT	230	SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
	231	TWO_DASHES, &start_group),
	232	SPECIAL(')', "end-group", N_("End a library search group"), NULL,
	233	TWO_DASHES, &end_group),
bae7f79e ILT	234	GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
bae7f79e ILT	235	N_("-L DIR, --library-path DIR"), TWO_DASHES,
61ba1cf9	236	&General_options::add_to_search_path),
652ec9bd ILT	237	GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
652ec9bd ILT	238	&General_options::ignore),
61ba1cf9 ILT	239	GENERAL_ARG('o', "output", N_("Set output file name"),
	240	N_("-o FILE, --output FILE"), TWO_DASHES,
	241	&General_options::set_output_file_name),
bae7f79e	242	GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
61ba1cf9	243	ONE_DASH, &General_options::set_relocatable),
92e059d8 ILT	244	GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
92e059d8 ILT	245	NULL, ONE_DASH, &General_options::set_shared),
bae7f79e	246	GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
61ba1cf9	247	NULL, ONE_DASH, &General_options::set_static),
bae7f79e ILT	248	SPECIAL('\0', "help", N_("Report usage information"), NULL,
	249	TWO_DASHES, &help)
	250	};
	251
61ba1cf9	252	const int options::Command_line_options::options_size =
bae7f79e ILT	253	sizeof (options) / sizeof (options[0]);
	254
	255	// The default values for the general options.
	256
61ba1cf9 ILT	257	General_options::General_options()
	258	: search_path_(),
	259	output_file_name_("a.out"),
	260	is_relocatable_(false),
92e059d8	261	is_shared_(false),
61ba1cf9	262	is_static_(false)
bae7f79e ILT	263	{
	264	}
	265
	266	// The default values for the position dependent options.
	267
61ba1cf9	268	Position_dependent_options::Position_dependent_options()
bae7f79e ILT	269	: do_static_search_(false)
	270	{
	271	}
	272
ead1e424	273	// Command_line options.
bae7f79e	274
61ba1cf9	275	Command_line::Command_line()
ead1e424	276	: options_(), position_options_(), inputs_(), in_group_(false)
bae7f79e ILT	277	{
	278	}
	279
	280	// Process the command line options.
	281
	282	void
61ba1cf9	283	Command_line::process(int argc, char** argv)
bae7f79e	284	{
61ba1cf9 ILT	285	const int options_size = options::Command_line_options::options_size;
	286	const options::One_option* options =
	287	options::Command_line_options::options;
bae7f79e ILT	288	bool no_more_options = false;
	289	int i = 0;
	290	while (i < argc)
	291	{
	292	if (argv[i][0] != '-' \|\| no_more_options)
	293	{
ead1e424	294	this->add_file(argv[i], false);
bae7f79e ILT	295	++i;
	296	continue;
	297	}
	298
	299	// Option starting with '-'.
	300	int dashes = 1;
	301	if (argv[i][1] == '-')
	302	{
	303	dashes = 2;
	304	if (argv[i][2] == '\0')
	305	{
	306	no_more_options = true;
	307	continue;
	308	}
	309	}
	310
	311	// Look for a long option match.
	312	char* opt = argv[i] + dashes;
	313	char first = opt[0];
	314	int skiparg = 0;
	315	char* arg = strchr(opt, '=');
	316	if (arg != NULL)
	317	*arg = '\0';
	318	else if (i + 1 < argc)
	319	{
	320	arg = argv[i + 1];
	321	skiparg = 1;
	322	}
	323
	324	int j;
	325	for (j = 0; j < options_size; ++j)
	326	{
	327	if (options[j].long_option != NULL
	328	&& (dashes == 2
	329	\|\| (options[j].dash
61ba1cf9	330	!= options::One_option::EXACTLY_TWO_DASHES))
bae7f79e ILT	331	&& first == options[j].long_option[0]
	332	&& strcmp(opt, options[j].long_option) == 0)
	333	{
	334	if (options[j].special)
	335	i += options[j].special(argc - 1, argv + i, opt, this);
	336	else
	337	{
	338	if (!options[j].takes_argument())
	339	{
	340	arg = NULL;
	341	skiparg = 0;
	342	}
	343	else
	344	{
	345	if (arg == NULL)
	346	this->usage(_("missing argument"), argv[i]);
	347	}
	348	this->apply_option(options[j], arg);
	349	i += skiparg + 1;
	350	}
	351	break;
	352	}
	353	}
	354	if (j < options_size)
	355	continue;
	356
	357	// If we saw two dashes, we need to see a long option.
	358	if (dashes == 2)
	359	this->usage(_("unknown option"), argv[i]);
	360
	361	// Look for a short option match. There may be more than one
	362	// short option in a given argument.
	363	bool done = false;
	364	char* s = argv[i] + 1;
	365	++i;
	366	while (*s != '\0' && !done)
	367	{
	368	char opt = *s;
	369	int j;
	370	for (j = 0; j < options_size; ++j)
	371	{
	372	if (options[j].short_option == opt)
	373	{
	374	if (options[j].special)
	375	{
	376	// Undo the argument skip done above.
	377	--i;
	378	i += options[j].special(argc - i, argv + i, s, this);
	379	done = true;
	380	}
	381	else
	382	{
	383	arg = NULL;
	384	if (options[j].takes_argument())
	385	{
	386	if (s[1] != '\0')
	387	{
	388	arg = s + 1;
	389	done = true;
	390	}
	391	else if (i < argc)
	392	{
	393	arg = argv[i];
	394	++i;
395	}
396	else
397	this->usage(_("missing argument"), opt);
398	}
399	this->apply_option(options[j], arg);
400	}
401	break;
402	}
403	}
404
405	if (j >= options_size)
406	this->usage(_("unknown option"), *s);
407
408	++s;
409	}
410	}
61ba1cf9	411
ead1e424 ILT	412	if (this->in_group_)
	413	{
	414	fprintf(stderr, _("%s: missing group end"), program_name);
	415	this->usage();
	416	}
	417
61ba1cf9 ILT	418	// FIXME: We should only do this when configured in native mode.
	419	this->options_.add_to_search_path("/lib");
	420	this->options_.add_to_search_path("/usr/lib");
bae7f79e ILT	421	}
	422
	423	// Apply a command line option.
	424
	425	void
61ba1cf9 ILT	426	Command_line::apply_option(const options::One_option& opt,
61ba1cf9 ILT	427	const char* arg)
bae7f79e ILT	428	{
	429	if (arg == NULL)
	430	{
	431	if (opt.general_noarg)
	432	(this->options_.*(opt.general_noarg))();
	433	else if (opt.dependent_noarg)
	434	(this->position_options_.*(opt.dependent_noarg))();
	435	else
61ba1cf9	436	gold_unreachable();
bae7f79e ILT	437	}
	438	else
	439	{
	440	if (opt.general_arg)
	441	(this->options_.*(opt.general_arg))(arg);
	442	else if (opt.dependent_arg)
	443	(this->position_options_.*(opt.dependent_arg))(arg);
	444	else
61ba1cf9	445	gold_unreachable();
bae7f79e ILT	446	}
	447	}
	448
ead1e424 ILT	449	// Add an input file or library.
	450
	451	void
	452	Command_line::add_file(const char* name, bool is_lib)
	453	{
	454	Input_file_argument file(name, is_lib, this->position_options_);
	455	if (!this->in_group_)
	456	this->inputs_.push_back(Input_argument(file));
	457	else
	458	{
	459	assert(!this->inputs_.empty());
	460	assert(this->inputs_.back().is_group());
	461	this->inputs_.back().group()->add_file(file);
	462	}
	463	}
	464
61ba1cf9 ILT	465	// Handle the -l option, which requires special treatment.
	466
	467	int
	468	Command_line::process_l_option(int argc, char** argv, char* arg)
	469	{
	470	int ret;
	471	const char* libname;
	472	if (arg[1] != '\0')
	473	{
	474	ret = 1;
	475	libname = arg + 1;
	476	}
	477	else if (argc > 1)
	478	{
	479	ret = 2;
	480	libname = argv[argc + 1];
	481	}
	482	else
	483	this->usage(_("missing argument"), arg);
	484
ead1e424	485	this->add_file(libname, true);
61ba1cf9 ILT	486
	487	return ret;
	488	}
	489
ead1e424 ILT	490	// Handle the --start-group option.
	491
	492	void
	493	Command_line::start_group(const char* arg)
	494	{
	495	if (this->in_group_)
	496	this->usage(_("may not nest groups"), arg);
	497
	498	// This object is leaked.
	499	Input_file_group* group = new Input_file_group();
	500	this->inputs_.push_back(Input_argument(group));
	501
	502	this->in_group_ = true;
	503	}
	504
	505	// Handle the --end-group option.
	506
	507	void
	508	Command_line::end_group(const char* arg)
	509	{
	510	if (!this->in_group_)
	511	this->usage(_("group end without group start"), arg);
	512	this->in_group_ = false;
	513	}
	514
bae7f79e ILT	515	// Report a usage error. */
	516
	517	void
61ba1cf9	518	Command_line::usage()
bae7f79e ILT	519	{
	520	fprintf(stderr,
	521	_("%s: use the --help option for usage information\n"),
61ba1cf9 ILT	522	program_name);
61ba1cf9 ILT	523	gold_exit(false);
bae7f79e ILT	524	}
	525
	526	void
61ba1cf9	527	Command_line::usage(const char* msg, const char *opt)
bae7f79e ILT	528	{
	529	fprintf(stderr,
	530	_("%s: %s: %s\n"),
61ba1cf9	531	program_name, opt, msg);
bae7f79e ILT	532	this->usage();
	533	}
	534
	535	void
61ba1cf9	536	Command_line::usage(const char* msg, char opt)
bae7f79e ILT	537	{
	538	fprintf(stderr,
	539	_("%s: -%c: %s\n"),
61ba1cf9	540	program_name, opt, msg);
bae7f79e ILT	541	this->usage();
bae7f79e ILT	542	}
61ba1cf9 ILT	543
61ba1cf9 ILT	544	} // End namespace gold.