aboutsummaryrefslogtreecommitdiff
path: root/ld/lexsup.c
blob: 47fd2c5fb98b066d0679b42076dd5d1aeaeb3b39 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
/* Parse options for the GNU linker.
   Copyright (C) 1991, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.

This file is part of GLD, the Gnu Linker.

GLD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GLD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GLD; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "getopt.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldgram.h"
#include "ldlex.h"
#include "ldfile.h"
#include "ldver.h"
#include "ldemul.h"

/* Somewhere above, sys/stat.h got included . . . . */
#if !defined(S_ISDIR) && defined(S_IFDIR)
#define	S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif

/* Omit args to avoid the possibility of clashing with a system header
   that might disagree about consts.  */
unsigned long strtoul ();

static void set_default_dirlist PARAMS ((char *dirlist_ptr));
static void set_section_start PARAMS ((char *sect, char *valstr));

/* Non-zero if we are processing a --defsym from the command line.  */
int parsing_defsym = 0;

void
parse_args (argc, argv)
     int argc;
     char **argv;
{
  int i;
  int ingroup = 0;
  char *default_dirlist = NULL;

  /* Starting the short option string with '-' is for programs that
     expect options and other ARGV-elements in any order and that care about
     the ordering of the two.  We describe each non-option ARGV-element
     as if it were the argument of an option with character code 1.  */

  const char *shortopts =
    "-a:A:b:c:de:F::G:gh:iL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:z:()";

  /* 150 isn't special; it's just an arbitrary non-ASCII char value.  */

#define OPTION_ASSERT			150
#define OPTION_CALL_SHARED		(OPTION_ASSERT + 1)
#define OPTION_DEFSYM			(OPTION_CALL_SHARED + 1)
#define OPTION_DYNAMIC_LINKER		(OPTION_DEFSYM + 1)
#define OPTION_EB			(OPTION_DYNAMIC_LINKER + 1)
#define OPTION_EL			(OPTION_EB + 1)
#define OPTION_EMBEDDED_RELOCS		(OPTION_EL + 1)
#define OPTION_EXPORT_DYNAMIC		(OPTION_EMBEDDED_RELOCS + 1)
#define OPTION_HELP			(OPTION_EXPORT_DYNAMIC + 1)
#define OPTION_IGNORE			(OPTION_HELP + 1)
#define OPTION_MAP			(OPTION_IGNORE + 1)
#define OPTION_NO_KEEP_MEMORY		(OPTION_MAP + 1)
#define OPTION_NOINHIBIT_EXEC		(OPTION_NO_KEEP_MEMORY + 1)
#define OPTION_NON_SHARED		(OPTION_NOINHIBIT_EXEC + 1)
#define OPTION_NO_WHOLE_ARCHIVE		(OPTION_NON_SHARED + 1)
#define OPTION_OFORMAT			(OPTION_NO_WHOLE_ARCHIVE + 1)
#define OPTION_RELAX			(OPTION_OFORMAT + 1)
#define OPTION_RETAIN_SYMBOLS_FILE	(OPTION_RELAX + 1)
#define OPTION_RPATH			(OPTION_RETAIN_SYMBOLS_FILE + 1)
#define OPTION_RPATH_LINK		(OPTION_RPATH + 1)
#define OPTION_SHARED			(OPTION_RPATH_LINK + 1)
#define OPTION_SONAME			(OPTION_SHARED + 1)
#define OPTION_SORT_COMMON		(OPTION_SONAME + 1)
#define OPTION_STATS			(OPTION_SORT_COMMON + 1)
#define OPTION_SYMBOLIC			(OPTION_STATS + 1)
#define OPTION_TBSS			(OPTION_SYMBOLIC + 1)
#define OPTION_TDATA			(OPTION_TBSS + 1)
#define OPTION_TTEXT			(OPTION_TDATA + 1)
#define OPTION_TRADITIONAL_FORMAT	(OPTION_TTEXT + 1)
#define OPTION_UR			(OPTION_TRADITIONAL_FORMAT + 1)
#define OPTION_VERBOSE			(OPTION_UR + 1)
#define OPTION_VERSION			(OPTION_VERBOSE + 1)
#define OPTION_WARN_COMMON		(OPTION_VERSION + 1)
#define OPTION_WARN_CONSTRUCTORS	(OPTION_WARN_COMMON + 1)
#define OPTION_WARN_MULTIPLE_GP		(OPTION_WARN_CONSTRUCTORS + 1)
#define OPTION_WARN_ONCE		(OPTION_WARN_MULTIPLE_GP + 1)
#define OPTION_SPLIT_BY_RELOC		(OPTION_WARN_ONCE + 1)
#define OPTION_SPLIT_BY_FILE 	    	(OPTION_SPLIT_BY_RELOC + 1)
#define OPTION_WHOLE_ARCHIVE		(OPTION_SPLIT_BY_FILE + 1)
#define OPTION_WRAP			(OPTION_WHOLE_ARCHIVE + 1)

  static struct option longopts[] = {
  /* Sorted alphabeticaly, except for the PE options grouped at the end. */
    {"assert", required_argument, NULL, OPTION_ASSERT},
    {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
    {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
    {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
    {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
    {"dc", no_argument, NULL, 'd'},
    {"defsym", required_argument, NULL, OPTION_DEFSYM},
    {"dll-verbose", no_argument, NULL, OPTION_VERSION}, /* Linux.  */
    {"dn", no_argument, NULL, OPTION_NON_SHARED},
    {"dp", no_argument, NULL, 'd'},
    {"dy", no_argument, NULL, OPTION_CALL_SHARED},
    {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
    {"EB", no_argument, NULL, OPTION_EB},
    {"EL", no_argument, NULL, OPTION_EL},
    {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
    {"end-group", no_argument, NULL, ')'},
    {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
    {"format", required_argument, NULL, 'b'},
    {"help", no_argument, NULL, OPTION_HELP},
    {"Map", required_argument, NULL, OPTION_MAP},
    {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
    {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
    {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
    {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
    {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
    {"oformat", required_argument, NULL, OPTION_OFORMAT},
    {"Qy", no_argument, NULL, OPTION_IGNORE},
    {"qmagic", no_argument, NULL, OPTION_IGNORE}, /* Linux compatibility.  */
    {"relax", no_argument, NULL, OPTION_RELAX},
    {"retain-symbols-file", required_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
    {"rpath", required_argument, NULL, OPTION_RPATH},
    {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
    {"shared", no_argument, NULL, OPTION_SHARED},
    {"soname", required_argument, NULL, OPTION_SONAME},
    {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
    {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
    {"start-group", no_argument, NULL, '('},
    {"stats", no_argument, NULL, OPTION_STATS},
    {"static", no_argument, NULL, OPTION_NON_SHARED},
    {"Tbss", required_argument, NULL, OPTION_TBSS},
    {"Tdata", required_argument, NULL, OPTION_TDATA},
    {"Ttext", required_argument, NULL, OPTION_TTEXT},
    {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
    {"Ur", no_argument, NULL, OPTION_UR},
    {"verbose", no_argument, NULL, OPTION_VERBOSE},
    {"version", no_argument, NULL, OPTION_VERSION},
    {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
    {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
    {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
    {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
    {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
    {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
    {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
    {"wrap", required_argument, NULL, OPTION_WRAP},

    {NULL, no_argument, NULL, 0}
  };

  /* The -G option is ambiguous on different platforms.  Sometimes it
     specifies the largest data size to put into the small data
     section.  Sometimes it is equivalent to --shared.  Unfortunately,
     the first form takes an argument, while the second does not.

     We need to permit the --shared form because on some platforms,
     such as Solaris, gcc -shared will pass -G to the linker.

     To permit either usage, we look through the argument list.  If we
     find -G not followed by a number, we change it into --shared.
     This will work for most normal cases.  */
  for (i = 1; i < argc; i++)
    if (strcmp (argv[i], "-G") == 0
	&& (i + 1 >= argc
	    || ! isdigit (argv[i + 1][0])))
      argv[i] = (char *) "--shared";

  while (1)
    {
      /* getopt_long_only is like getopt_long, but '-' as well as '--' can
	 indicate a long option.  */
      int longind;
      int optc;

      if (ldemul_parse_args (argc, argv))
	continue;

      optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);

      if (optc == -1)
	break;
      switch (optc)
	{
	default:
	  xexit (1);
	case 1:			/* File name.  */
	  lang_add_input_file (optarg, lang_input_file_is_file_enum,
			       (char *) NULL);
	  break;

	case OPTION_IGNORE:
	  break;
	case 'a':
	  /* For HP/UX compatibility.  Actually -a shared should mean
             ``use only shared libraries'' but, then, we don't
             currently support shared libraries on HP/UX anyhow.  */
	  if (strcmp (optarg, "archive") == 0)
	    config.dynamic_link = false;
	  else if (strcmp (optarg, "shared") == 0
		   || strcmp (optarg, "default") == 0)
	    config.dynamic_link = true;
	  else
	    einfo ("%P%F: unrecognized -a option `%s'\n", optarg);
	  break;
	case OPTION_ASSERT:
	  /* FIXME: We just ignore these, but we should handle them.  */
	  if (strcmp (optarg, "definitions") == 0)
	    ;
	  else if (strcmp (optarg, "nodefinitions") == 0)
	    ;
	  else if (strcmp (optarg, "nosymbolic") == 0)
	    ;
	  else if (strcmp (optarg, "pure-text") == 0)
	    ;
	  else
	    einfo ("%P%F: unrecognized -assert option `%s'\n", optarg);
	  break;
	case 'A':
	  ldfile_add_arch (optarg);
	  break;
	case 'b':
	  lang_add_target (optarg);
	  break;
	case 'c':
	  ldfile_open_command_file (optarg);
	  parser_input = input_mri_script;
	  yyparse ();
	  break;
	case OPTION_CALL_SHARED:
	  config.dynamic_link = true;
	  break;
	case OPTION_NON_SHARED:
	  config.dynamic_link = false;
	  break;
	case 'd':
	  command_line.force_common_definition = true;
	  break;
	case OPTION_DEFSYM:
	  lex_string = optarg;
	  lex_redirect (optarg);
	  parser_input = input_defsym;
	  parsing_defsym = 1;
	  yyparse ();
	  parsing_defsym = 0;
	  lex_string = NULL;
	  break;
	case OPTION_DYNAMIC_LINKER:
	  command_line.interpreter = optarg;
	  break;
	case OPTION_EB:
	  command_line.endian = ENDIAN_BIG;
	  break;
	case OPTION_EL:
	  command_line.endian = ENDIAN_LITTLE;
	  break;
	case OPTION_EMBEDDED_RELOCS:
	  command_line.embedded_relocs = true;
	  break;
	case OPTION_EXPORT_DYNAMIC:
	  command_line.export_dynamic = true;
	  break;
	case 'e':
	  lang_add_entry (optarg, true);
	  break;
	case 'F':
	  /* Ignore.  */
	  break;
	case 'G':
	  {
	    char *end;
	    g_switch_value = strtoul (optarg, &end, 0);
	    if (*end)
	      einfo ("%P%F: invalid number `%s'\n", optarg);
	  }
	  break;
	case 'g':
	  /* Ignore.  */
	  break;
	case OPTION_HELP:
	  help ();
	  xexit (0);
	  break;
	case 'L':
	  ldfile_add_library_path (optarg, true);
	  break;
	case 'l':
	  lang_add_input_file (optarg, lang_input_file_is_l_enum,
			       (char *) NULL);
	  break;
	case 'M':
	  config.map_filename = "-";
	  break;
	case 'm':
	  /* Ignore.  Was handled in a pre-parse.   */
	  break;
	case OPTION_MAP:
	  config.map_filename = optarg;
	  break;
	case 'N':
	  config.text_read_only = false;
	  config.magic_demand_paged = false;
	  config.dynamic_link = false;
	  break;
	case 'n':
	  config.magic_demand_paged = false;
	  config.dynamic_link = false;
	  break;
	case OPTION_NO_KEEP_MEMORY:
	  link_info.keep_memory = false;
	  break;
	case OPTION_NOINHIBIT_EXEC:
	  force_make_executable = true;
	  break;
	case OPTION_NO_WHOLE_ARCHIVE:
	  whole_archive = false;
	  break;
	case 'O':
	  /* FIXME "-O<non-digits> <value>" used to set the address of
	     section <non-digits>.  Was this for compatibility with
	     something, or can we create a new option to do that
	     (with a syntax similar to -defsym)?
	     getopt can't handle two args to an option without kludges.  */
	  break;
	case 'o':
	  lang_add_output (optarg, 0); 
	  break;
	case OPTION_OFORMAT:
	  lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
	  break;
	case 'i':
	case 'r':
	  link_info.relocateable = true;
	  config.build_constructors = false;
	  config.magic_demand_paged = false;
	  config.text_read_only = false;
	  config.dynamic_link = false;
	  break;
	case 'R':
	  /* The GNU linker traditionally uses -R to mean to include
	     only the symbols from a file.  The Solaris linker uses -R
	     to set the path used by the runtime linker to find
	     libraries.  This is the GNU linker -rpath argument.  We
	     try to support both simultaneously by checking the file
	     named.  If it is a directory, rather than a regular file,
	     we assume -rpath was meant.  */
	  {
	    struct stat s;

	    if (stat (optarg, &s) >= 0
		&& ! S_ISDIR (s.st_mode))
	      {
		lang_add_input_file (optarg,
				     lang_input_file_is_symbols_only_enum,
				     (char *) NULL);
		break;
	      }
	  }
	  /* Fall through.  */
	case OPTION_RPATH:
	  if (command_line.rpath == NULL)
	    command_line.rpath = buystring (optarg);
	  else
	    {
	      char *buf;

	      buf = xmalloc (strlen (command_line.rpath)
			     + strlen (optarg)
			     + 2);
	      sprintf (buf, "%s:%s", command_line.rpath, optarg);
	      free (command_line.rpath);
	      command_line.rpath = buf;
	    }
	  break;
	case OPTION_RPATH_LINK:
	  if (command_line.rpath_link == NULL)
	    command_line.rpath_link = buystring (optarg);
	  else
	    {
	      char *buf;

	      buf = xmalloc (strlen (command_line.rpath_link)
			     + strlen (optarg)
			     + 2);
	      sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
	      free (command_line.rpath_link);
	      command_line.rpath_link = buf;
	    }
	  break;
	case OPTION_RELAX:
	  command_line.relax = true;
	  break;
	case OPTION_RETAIN_SYMBOLS_FILE:
	  add_keepsyms_file (optarg);
	  break;
	case 'S':
	  link_info.strip = strip_debugger;
	  break;
	case 's':
	  link_info.strip = strip_all;
	  break;
	case OPTION_SHARED:
	  link_info.shared = true;
	  break;
	case 'h':		/* Used on Solaris.  */
	case OPTION_SONAME:
	  command_line.soname = optarg;
	  break;
	case OPTION_SORT_COMMON:
	  config.sort_common = true;
	  break;
	case OPTION_STATS:
	  config.stats = true;
	  break;
	case OPTION_SYMBOLIC:
	  link_info.symbolic = true;
	  break;
	case 't':
	  trace_files = true;
	  break;
	case 'T':
	  ldfile_open_command_file (optarg);
	  parser_input = input_script;
	  yyparse ();
	  break;
	case OPTION_TBSS:
	  set_section_start (".bss", optarg);
	  break;
	case OPTION_TDATA:
	  set_section_start (".data", optarg);
	  break;
	case OPTION_TTEXT:
	  set_section_start (".text", optarg);
	  break;
	case OPTION_TRADITIONAL_FORMAT:
	  config.traditional_format = true;
	  break;
	case OPTION_UR:
	  link_info.relocateable = true;
	  config.build_constructors = true;
	  config.magic_demand_paged = false;
	  config.text_read_only = false;
	  config.dynamic_link = false;
	  break;
	case 'u':
	  ldlang_add_undef (optarg);
	  break;
	case OPTION_VERBOSE:
	  ldversion (1);
	  version_printed = true;
	  trace_file_tries = true;
	  break;
	case 'v':
	  ldversion (0);
	  version_printed = true;
	  break;
	case 'V':
	  ldversion (1);
	  version_printed = true;
	  break;
	case OPTION_VERSION:
	  ldversion (0);
	  version_printed = true;
	  break;
	case OPTION_WARN_COMMON:
	  config.warn_common = true;
	  break;
	case OPTION_WARN_CONSTRUCTORS:
	  config.warn_constructors = true;
	  break;
	case OPTION_WARN_MULTIPLE_GP:
	  config.warn_multiple_gp = true;
	  break;
	case OPTION_WARN_ONCE:
	  config.warn_once = true;
	  break;
	case OPTION_WHOLE_ARCHIVE:
	  whole_archive = true;
	  break;
	case OPTION_WRAP:
	  if (link_info.wrap_hash == NULL)
	    {
	      link_info.wrap_hash = ((struct bfd_hash_table *)
				     xmalloc (sizeof (struct bfd_hash_table)));
	      if (! bfd_hash_table_init_n (link_info.wrap_hash,
					   bfd_hash_newfunc,
					   61))
		einfo ("%P%F: bfd_hash_table_init failed: %E\n");
	    }
	  if (bfd_hash_lookup (link_info.wrap_hash, optarg, true, true)
	      == NULL)
	    einfo ("%P%F: bfd_hash_lookup failed: %E\n");
	  break;
	case 'X':
	  link_info.discard = discard_l;
	  break;
	case 'x':
	  link_info.discard = discard_all;
	  break;
	case 'Y':
	  if (strncmp (optarg, "P,", 2) == 0)
	    optarg += 2;
	  default_dirlist = optarg;
	  break;
	case 'y':
	  add_ysym (optarg);
	  break;
	case 'z':
	  /* We accept and ignore this option for Solaris
             compatibility.  Actually, on Solaris, optarg is not
             ignored.  Someday we should handle it correctly.  FIXME.  */
	  break;
	case OPTION_SPLIT_BY_RELOC:
	  config.split_by_reloc = atoi (optarg);
	  break; 
	case OPTION_SPLIT_BY_FILE:
	  config.split_by_file = true;
	  break; 
	case '(':
	  if (ingroup)
	    {
	      fprintf (stderr,
		       "%s: may not nest groups (--help for usage)\n",
		       program_name);
	      xexit (1);
	    }
	  lang_enter_group ();
	  ingroup = 1;
	  break;
	case ')':
	  if (! ingroup)
	    {
	      fprintf (stderr,
		       "%s: group ended before it began (--help for usage)\n",
		       program_name);
	      xexit (1);
	    }
	  lang_leave_group ();
	  ingroup = 0;
	  break;

	}
    }

  if (ingroup)
    lang_leave_group ();

  if (default_dirlist != NULL)
    set_default_dirlist (default_dirlist);

}

/* Add the (colon-separated) elements of DIRLIST_PTR to the
   library search path.  */

static void
set_default_dirlist (dirlist_ptr)
     char *dirlist_ptr;
{
  char *p;

  while (1)
    {
      p = strchr (dirlist_ptr, ':');
      if (p != NULL)
	*p = 0;
      if (*dirlist_ptr)
	ldfile_add_library_path (dirlist_ptr, true);
      if (p == NULL)
	break;
      *p = ':';
      dirlist_ptr = p + 1;
    }
}

static void
set_section_start (sect, valstr)
     char *sect, *valstr;
{
  char *end;
  unsigned long val = strtoul (valstr, &end, 16);
  if (*end)
    einfo ("%P%F: invalid hex number `%s'\n", valstr);
  lang_section_start (sect, exp_intop (val));
}