[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);
}

// 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),
  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('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', "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_static_(false)
{
}

// The default values for the position dependent options.

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

// Construct a Command_line.

Command_line::Command_line()
{
}

// 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->inputs_.push_back(Input_argument(argv[i], false,
						 this->position_options_));
	  ++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;
	}
    }

  // 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();
    }
}

// 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->inputs_.push_back(Input_argument(libname, true,
					 this->position_options_));

  return ret;
}

// 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
bae7f79e ILT	92	// Report usage information for ld --help, and exit.
	93
	94	int
	95	help(int, char*, char, gold::Command_line*)
	96	{
	97	printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
	98
	99	const int options_size = gold::options::Command_line_options::options_size;
	100	const gold::options::One_option* options =
	101	gold::options::Command_line_options::options;
	102	for (int i = 0; i < options_size; ++i)
	103	{
	104	if (options[i].doc == NULL)
	105	continue;
	106
	107	printf(" ");
	108	int len = 2;
	109	bool comma = false;
	110
	111	int j = i;
	112	do
	113	{
	114	if (options[j].help_output != NULL)
	115	{
	116	if (comma)
	117	{
	118	printf(", ");
	119	len += 2;
	120	}
	121	printf(options[j].help_output);
	122	len += std::strlen(options[i].help_output);
	123	}
	124	else
	125	{
	126	if (options[j].short_option != '\0')
	127	{
	128	if (comma)
	129	{
	130	printf(", ");
	131	len += 2;
	132	}
	133	printf("-%c", options[j].short_option);
	134	len += 2;
	135	}
	136
	137	if (options[j].long_option != NULL)
	138	{
	139	if (comma)
	140	{
	141	printf(", ");
	142	len += 2;
	143	}
	144	if (options[j].dash == gold::options::One_option::ONE_DASH)
	145	{
	146	printf("-");
	147	++len;
	148	}
	149	else
	150	{
	151	printf("--");
	152	len += 2;
	153	}
	154	printf("%s", options[j].long_option);
	155	len += std::strlen(options[j].long_option);
156	}
157	}
158	++j;
159	}
160	while (j < options_size && options[j].doc == NULL);
161
162	if (len > 30)
163	{
164	printf("\n");
165	len = 0;
166	}
167	for (; len < 30; ++len)
168	std::putchar(' ');
169
170	std::puts(options[i].doc);
171	}
172
173	gold::gold_exit(true);
174
175	return 0;
176	}
177
61ba1cf9 ILT	178	} // End anonymous namespace.
	179
	180	namespace gold
	181	{
bae7f79e ILT	182
	183	// Helper macros used to specify the options. We could also do this
	184	// using constructors, but then g++ would generate code to initialize
	185	// the array. We want the array to be initialized statically so that
	186	// we get better startup time.
	187
	188	#define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	189	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	190	NULL, func, NULL, NULL, NULL }
bae7f79e ILT	191	#define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	192	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	193	NULL, NULL, func, NULL, NULL }
bae7f79e ILT	194	#define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	195	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	196	NULL, NULL, NULL, func, NULL }
bae7f79e ILT	197	#define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
61ba1cf9	198	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	199	NULL, NULL, NULL, NULL, func }
bae7f79e ILT	200	#define SPECIAL(short_option, long_option, doc, help, dash, func) \
61ba1cf9	201	{ short_option, long_option, doc, help, options::One_option::dash, \
bae7f79e ILT	202	func, NULL, NULL, NULL, NULL }
	203
	204	// Here is the actual list of options which we accept.
	205
61ba1cf9 ILT	206	const options::One_option
61ba1cf9 ILT	207	options::Command_line_options::options[] =
bae7f79e	208	{
61ba1cf9 ILT	209	SPECIAL('l', "library", N_("Search for library LIBNAME"),
	210	N_("-lLIBNAME --library LIBNAME"), TWO_DASHES,
	211	&library),
bae7f79e ILT	212	GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
bae7f79e ILT	213	N_("-L DIR, --library-path DIR"), TWO_DASHES,
61ba1cf9 ILT	214	&General_options::add_to_search_path),
	215	GENERAL_ARG('o', "output", N_("Set output file name"),
	216	N_("-o FILE, --output FILE"), TWO_DASHES,
	217	&General_options::set_output_file_name),
bae7f79e	218	GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
61ba1cf9	219	ONE_DASH, &General_options::set_relocatable),
bae7f79e	220	GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
61ba1cf9	221	NULL, ONE_DASH, &General_options::set_static),
bae7f79e ILT	222	SPECIAL('\0', "help", N_("Report usage information"), NULL,
	223	TWO_DASHES, &help)
	224	};
	225
61ba1cf9	226	const int options::Command_line_options::options_size =
bae7f79e ILT	227	sizeof (options) / sizeof (options[0]);
	228
	229	// The default values for the general options.
	230
61ba1cf9 ILT	231	General_options::General_options()
	232	: search_path_(),
	233	output_file_name_("a.out"),
	234	is_relocatable_(false),
	235	is_static_(false)
bae7f79e ILT	236	{
	237	}
	238
	239	// The default values for the position dependent options.
	240
61ba1cf9	241	Position_dependent_options::Position_dependent_options()
bae7f79e ILT	242	: do_static_search_(false)
	243	{
	244	}
	245
	246	// Construct a Command_line.
	247
61ba1cf9	248	Command_line::Command_line()
bae7f79e ILT	249	{
	250	}
	251
	252	// Process the command line options.
	253
	254	void
61ba1cf9	255	Command_line::process(int argc, char** argv)
bae7f79e	256	{
61ba1cf9 ILT	257	const int options_size = options::Command_line_options::options_size;
	258	const options::One_option* options =
	259	options::Command_line_options::options;
bae7f79e ILT	260	bool no_more_options = false;
	261	int i = 0;
	262	while (i < argc)
	263	{
	264	if (argv[i][0] != '-' \|\| no_more_options)
	265	{
61ba1cf9	266	this->inputs_.push_back(Input_argument(argv[i], false,
bae7f79e ILT	267	this->position_options_));
	268	++i;
	269	continue;
	270	}
	271
	272	// Option starting with '-'.
	273	int dashes = 1;
	274	if (argv[i][1] == '-')
	275	{
	276	dashes = 2;
	277	if (argv[i][2] == '\0')
	278	{
	279	no_more_options = true;
	280	continue;
	281	}
	282	}
	283
	284	// Look for a long option match.
	285	char* opt = argv[i] + dashes;
	286	char first = opt[0];
	287	int skiparg = 0;
	288	char* arg = strchr(opt, '=');
	289	if (arg != NULL)
	290	*arg = '\0';
	291	else if (i + 1 < argc)
	292	{
	293	arg = argv[i + 1];
	294	skiparg = 1;
	295	}
	296
	297	int j;
	298	for (j = 0; j < options_size; ++j)
	299	{
	300	if (options[j].long_option != NULL
	301	&& (dashes == 2
	302	\|\| (options[j].dash
61ba1cf9	303	!= options::One_option::EXACTLY_TWO_DASHES))
bae7f79e ILT	304	&& first == options[j].long_option[0]
	305	&& strcmp(opt, options[j].long_option) == 0)
	306	{
	307	if (options[j].special)
	308	i += options[j].special(argc - 1, argv + i, opt, this);
	309	else
	310	{
	311	if (!options[j].takes_argument())
	312	{
	313	arg = NULL;
	314	skiparg = 0;
	315	}
	316	else
	317	{
	318	if (arg == NULL)
	319	this->usage(_("missing argument"), argv[i]);
	320	}
	321	this->apply_option(options[j], arg);
	322	i += skiparg + 1;
	323	}
	324	break;
	325	}
	326	}
	327	if (j < options_size)
	328	continue;
	329
	330	// If we saw two dashes, we need to see a long option.
	331	if (dashes == 2)
	332	this->usage(_("unknown option"), argv[i]);
	333
	334	// Look for a short option match. There may be more than one
	335	// short option in a given argument.
	336	bool done = false;
	337	char* s = argv[i] + 1;
	338	++i;
	339	while (*s != '\0' && !done)
	340	{
	341	char opt = *s;
	342	int j;
	343	for (j = 0; j < options_size; ++j)
	344	{
	345	if (options[j].short_option == opt)
	346	{
	347	if (options[j].special)
	348	{
	349	// Undo the argument skip done above.
	350	--i;
	351	i += options[j].special(argc - i, argv + i, s, this);
	352	done = true;
	353	}
	354	else
	355	{
	356	arg = NULL;
	357	if (options[j].takes_argument())
	358	{
	359	if (s[1] != '\0')
	360	{
	361	arg = s + 1;
	362	done = true;
	363	}
	364	else if (i < argc)
	365	{
	366	arg = argv[i];
	367	++i;
368	}
369	else
370	this->usage(_("missing argument"), opt);
371	}
372	this->apply_option(options[j], arg);
373	}
374	break;
375	}
376	}
377
378	if (j >= options_size)
379	this->usage(_("unknown option"), *s);
380
381	++s;
382	}
383	}
61ba1cf9 ILT	384
	385	// FIXME: We should only do this when configured in native mode.
	386	this->options_.add_to_search_path("/lib");
	387	this->options_.add_to_search_path("/usr/lib");
bae7f79e ILT	388	}
	389
	390	// Apply a command line option.
	391
	392	void
61ba1cf9 ILT	393	Command_line::apply_option(const options::One_option& opt,
61ba1cf9 ILT	394	const char* arg)
bae7f79e ILT	395	{
	396	if (arg == NULL)
	397	{
	398	if (opt.general_noarg)
	399	(this->options_.*(opt.general_noarg))();
	400	else if (opt.dependent_noarg)
	401	(this->position_options_.*(opt.dependent_noarg))();
	402	else
61ba1cf9	403	gold_unreachable();
bae7f79e ILT	404	}
	405	else
	406	{
	407	if (opt.general_arg)
	408	(this->options_.*(opt.general_arg))(arg);
	409	else if (opt.dependent_arg)
	410	(this->position_options_.*(opt.dependent_arg))(arg);
	411	else
61ba1cf9	412	gold_unreachable();
bae7f79e ILT	413	}
	414	}
	415
61ba1cf9 ILT	416	// Handle the -l option, which requires special treatment.
	417
	418	int
	419	Command_line::process_l_option(int argc, char** argv, char* arg)
	420	{
	421	int ret;
	422	const char* libname;
	423	if (arg[1] != '\0')
	424	{
	425	ret = 1;
	426	libname = arg + 1;
	427	}
	428	else if (argc > 1)
	429	{
	430	ret = 2;
	431	libname = argv[argc + 1];
	432	}
	433	else
	434	this->usage(_("missing argument"), arg);
	435
	436	this->inputs_.push_back(Input_argument(libname, true,
	437	this->position_options_));
	438
	439	return ret;
	440	}
	441
bae7f79e ILT	442	// Report a usage error. */
	443
	444	void
61ba1cf9	445	Command_line::usage()
bae7f79e ILT	446	{
	447	fprintf(stderr,
	448	_("%s: use the --help option for usage information\n"),
61ba1cf9 ILT	449	program_name);
61ba1cf9 ILT	450	gold_exit(false);
bae7f79e ILT	451	}
	452
	453	void
61ba1cf9	454	Command_line::usage(const char* msg, const char *opt)
bae7f79e ILT	455	{
	456	fprintf(stderr,
	457	_("%s: %s: %s\n"),
61ba1cf9	458	program_name, opt, msg);
bae7f79e ILT	459	this->usage();
	460	}
	461
	462	void
61ba1cf9	463	Command_line::usage(const char* msg, char opt)
bae7f79e ILT	464	{
	465	fprintf(stderr,
	466	_("%s: -%c: %s\n"),
61ba1cf9	467	program_name, opt, msg);
bae7f79e ILT	468	this->usage();
bae7f79e ILT	469	}
61ba1cf9 ILT	470
61ba1cf9 ILT	471	} // End namespace gold.