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bfd/
[binutils.git] / ld / lexsup.c
blobf1b5b4c0ffe11e832f9da872655f9f1538bcf9f8
1 /* Parse options for the GNU linker.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
5
6 This file is part of the GNU Binutils.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdver.h"
26 #include "libiberty.h"
27 #include <stdio.h>
28 #include <string.h>
29 #include "safe-ctype.h"
30 #include "getopt.h"
31 #include "bfdlink.h"
32 #include "ld.h"
33 #include "ldmain.h"
34 #include "ldmisc.h"
35 #include "ldexp.h"
36 #include "ldlang.h"
37 #include <ldgram.h>
38 #include "ldlex.h"
39 #include "ldfile.h"
40 #include "ldver.h"
41 #include "ldemul.h"
42 #include "demangle.h"
43
44 #ifndef PATH_SEPARATOR
45 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
46 #define PATH_SEPARATOR ';'
47 #else
48 #define PATH_SEPARATOR ':'
49 #endif
50 #endif
51
52 /* Somewhere above, sys/stat.h got included . . . . */
53 #if !defined(S_ISDIR) && defined(S_IFDIR)
54 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
55 #endif
56
57 static void set_default_dirlist (char *);
58 static void set_section_start (char *, char *);
59 static void set_segment_start (const char *, char *);
60 static void help (void);
61
62 /* Non-zero if we are processing a --defsym from the command line. */
63 int parsing_defsym = 0;
64
65 /* Codes used for the long options with no short synonyms. 150 isn't
66 special; it's just an arbitrary non-ASCII char value. */
67 enum option_values
68 {
69 OPTION_ASSERT = 150,
70 OPTION_CALL_SHARED,
71 OPTION_CREF,
72 OPTION_DEFSYM,
73 OPTION_DEMANGLE,
74 OPTION_DYNAMIC_LINKER,
75 OPTION_SYSROOT,
76 OPTION_EB,
77 OPTION_EL,
78 OPTION_EMBEDDED_RELOCS,
79 OPTION_EXPORT_DYNAMIC,
80 OPTION_HELP,
81 OPTION_IGNORE,
82 OPTION_MAP,
83 OPTION_NO_DEMANGLE,
84 OPTION_NO_KEEP_MEMORY,
85 OPTION_NO_WARN_MISMATCH,
86 OPTION_NO_WARN_SEARCH_MISMATCH,
87 OPTION_NOINHIBIT_EXEC,
88 OPTION_NON_SHARED,
89 OPTION_NO_WHOLE_ARCHIVE,
90 OPTION_OFORMAT,
91 OPTION_RELAX,
92 OPTION_RETAIN_SYMBOLS_FILE,
93 OPTION_RPATH,
94 OPTION_RPATH_LINK,
95 OPTION_SHARED,
96 OPTION_SONAME,
97 OPTION_SORT_COMMON,
98 OPTION_SORT_SECTION,
99 OPTION_STATS,
100 OPTION_SYMBOLIC,
101 OPTION_SYMBOLIC_FUNCTIONS,
102 OPTION_TASK_LINK,
103 OPTION_TBSS,
104 OPTION_TDATA,
105 OPTION_TTEXT,
106 OPTION_TTEXT_SEGMENT,
107 OPTION_TRADITIONAL_FORMAT,
108 OPTION_UR,
109 OPTION_VERBOSE,
110 OPTION_VERSION,
111 OPTION_VERSION_SCRIPT,
112 OPTION_VERSION_EXPORTS_SECTION,
113 OPTION_DYNAMIC_LIST,
114 OPTION_DYNAMIC_LIST_CPP_NEW,
115 OPTION_DYNAMIC_LIST_CPP_TYPEINFO,
116 OPTION_DYNAMIC_LIST_DATA,
117 OPTION_WARN_COMMON,
118 OPTION_WARN_CONSTRUCTORS,
119 OPTION_WARN_FATAL,
120 OPTION_NO_WARN_FATAL,
121 OPTION_WARN_MULTIPLE_GP,
122 OPTION_WARN_ONCE,
123 OPTION_WARN_SECTION_ALIGN,
124 OPTION_SPLIT_BY_RELOC,
125 OPTION_SPLIT_BY_FILE ,
126 OPTION_WHOLE_ARCHIVE,
127 OPTION_ADD_NEEDED,
128 OPTION_NO_ADD_NEEDED,
129 OPTION_AS_NEEDED,
130 OPTION_NO_AS_NEEDED,
131 OPTION_WRAP,
132 OPTION_FORCE_EXE_SUFFIX,
133 OPTION_GC_SECTIONS,
134 OPTION_NO_GC_SECTIONS,
135 OPTION_PRINT_GC_SECTIONS,
136 OPTION_NO_PRINT_GC_SECTIONS,
137 OPTION_HASH_SIZE,
138 OPTION_CHECK_SECTIONS,
139 OPTION_NO_CHECK_SECTIONS,
140 OPTION_NO_UNDEFINED,
141 OPTION_INIT,
142 OPTION_FINI,
143 OPTION_SECTION_START,
144 OPTION_UNIQUE,
145 OPTION_TARGET_HELP,
146 OPTION_ALLOW_SHLIB_UNDEFINED,
147 OPTION_NO_ALLOW_SHLIB_UNDEFINED,
148 OPTION_ALLOW_MULTIPLE_DEFINITION,
149 OPTION_NO_UNDEFINED_VERSION,
150 OPTION_DEFAULT_SYMVER,
151 OPTION_DEFAULT_IMPORTED_SYMVER,
152 OPTION_DISCARD_NONE,
153 OPTION_SPARE_DYNAMIC_TAGS,
154 OPTION_NO_DEFINE_COMMON,
155 OPTION_NOSTDLIB,
156 OPTION_NO_OMAGIC,
157 OPTION_STRIP_DISCARDED,
158 OPTION_NO_STRIP_DISCARDED,
159 OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
160 OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
161 OPTION_PIE,
162 OPTION_UNRESOLVED_SYMBOLS,
163 OPTION_WARN_UNRESOLVED_SYMBOLS,
164 OPTION_ERROR_UNRESOLVED_SYMBOLS,
165 OPTION_WARN_SHARED_TEXTREL,
166 OPTION_WARN_ALTERNATE_EM,
167 OPTION_REDUCE_MEMORY_OVERHEADS,
168 OPTION_DEFAULT_SCRIPT
169 };
170
171 /* The long options. This structure is used for both the option
172 parsing and the help text. */
173
174 struct ld_option
175 {
176 /* The long option information. */
177 struct option opt;
178 /* The short option with the same meaning ('\0' if none). */
179 char shortopt;
180 /* The name of the argument (NULL if none). */
181 const char *arg;
182 /* The documentation string. If this is NULL, this is a synonym for
183 the previous option. */
184 const char *doc;
185 enum {
186 /* Use one dash before long option name. */
187 ONE_DASH,
188 /* Use two dashes before long option name. */
189 TWO_DASHES,
190 /* Only accept two dashes before the long option name.
191 This is an overloading of the use of this enum, since originally it
192 was only intended to tell the --help display function how to display
193 the long option name. This feature was added in order to resolve
194 the confusion about the -omagic command line switch. Is it setting
195 the output file name to "magic" or is it setting the NMAGIC flag on
196 the output ? It has been decided that it is setting the output file
197 name, and that if you want to set the NMAGIC flag you should use -N
198 or --omagic. */
199 EXACTLY_TWO_DASHES,
200 /* Don't mention this option in --help output. */
201 NO_HELP
202 } control;
203 };
204
205 static const struct ld_option ld_options[] =
206 {
207 { {NULL, required_argument, NULL, '\0'},
208 'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
209 ONE_DASH },
210 { {"architecture", required_argument, NULL, 'A'},
211 'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
212 { {"format", required_argument, NULL, 'b'},
213 'b', N_("TARGET"), N_("Specify target for following input files"),
214 TWO_DASHES },
215 { {"mri-script", required_argument, NULL, 'c'},
216 'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
217 { {"dc", no_argument, NULL, 'd'},
218 'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
219 { {"dp", no_argument, NULL, 'd'},
220 '\0', NULL, NULL, ONE_DASH },
221 { {"entry", required_argument, NULL, 'e'},
222 'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
223 { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
224 'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
225 { {"EB", no_argument, NULL, OPTION_EB},
226 '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
227 { {"EL", no_argument, NULL, OPTION_EL},
228 '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
229 { {"auxiliary", required_argument, NULL, 'f'},
230 'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
231 TWO_DASHES },
232 { {"filter", required_argument, NULL, 'F'},
233 'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
234 TWO_DASHES },
235 { {NULL, no_argument, NULL, '\0'},
236 'g', NULL, N_("Ignored"), ONE_DASH },
237 { {"gpsize", required_argument, NULL, 'G'},
238 'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
239 TWO_DASHES },
240 { {"soname", required_argument, NULL, OPTION_SONAME},
241 'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
242 { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
243 'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
244 TWO_DASHES },
245 { {"library", required_argument, NULL, 'l'},
246 'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
247 { {"library-path", required_argument, NULL, 'L'},
248 'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
249 TWO_DASHES },
250 { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
251 '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
252 { {NULL, required_argument, NULL, '\0'},
253 'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
254 { {"print-map", no_argument, NULL, 'M'},
255 'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
256 { {"nmagic", no_argument, NULL, 'n'},
257 'n', NULL, N_("Do not page align data"), TWO_DASHES },
258 { {"omagic", no_argument, NULL, 'N'},
259 'N', NULL, N_("Do not page align data, do not make text readonly"),
260 EXACTLY_TWO_DASHES },
261 { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
262 '\0', NULL, N_("Page align data, make text readonly"),
263 EXACTLY_TWO_DASHES },
264 { {"output", required_argument, NULL, 'o'},
265 'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
266 { {NULL, required_argument, NULL, '\0'},
267 'O', NULL, N_("Optimize output file"), ONE_DASH },
268 { {"Qy", no_argument, NULL, OPTION_IGNORE},
269 '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
270 { {"emit-relocs", no_argument, NULL, 'q'},
271 'q', NULL, "Generate relocations in final output", TWO_DASHES },
272 { {"relocatable", no_argument, NULL, 'r'},
273 'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
274 { {NULL, no_argument, NULL, '\0'},
275 'i', NULL, NULL, ONE_DASH },
276 { {"just-symbols", required_argument, NULL, 'R'},
277 'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
278 TWO_DASHES },
279 { {"strip-all", no_argument, NULL, 's'},
280 's', NULL, N_("Strip all symbols"), TWO_DASHES },
281 { {"strip-debug", no_argument, NULL, 'S'},
282 'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
283 { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
284 '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
285 { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
286 '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
287 { {"trace", no_argument, NULL, 't'},
288 't', NULL, N_("Trace file opens"), TWO_DASHES },
289 { {"script", required_argument, NULL, 'T'},
290 'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
291 { {"default-script", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
292 '\0', N_("FILE"), N_("Read default linker script"), TWO_DASHES },
293 { {"dT", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
294 '\0', NULL, NULL, ONE_DASH },
295 { {"undefined", required_argument, NULL, 'u'},
296 'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
297 TWO_DASHES },
298 { {"unique", optional_argument, NULL, OPTION_UNIQUE},
299 '\0', N_("[=SECTION]"),
300 N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
301 { {"Ur", no_argument, NULL, OPTION_UR},
302 '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
303 { {"version", no_argument, NULL, OPTION_VERSION},
304 'v', NULL, N_("Print version information"), TWO_DASHES },
305 { {NULL, no_argument, NULL, '\0'},
306 'V', NULL, N_("Print version and emulation information"), ONE_DASH },
307 { {"discard-all", no_argument, NULL, 'x'},
308 'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
309 { {"discard-locals", no_argument, NULL, 'X'},
310 'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
311 { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
312 '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
313 { {"trace-symbol", required_argument, NULL, 'y'},
314 'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
315 { {NULL, required_argument, NULL, '\0'},
316 'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
317 ONE_DASH },
318 { {"start-group", no_argument, NULL, '('},
319 '(', NULL, N_("Start a group"), TWO_DASHES },
320 { {"end-group", no_argument, NULL, ')'},
321 ')', NULL, N_("End a group"), TWO_DASHES },
322 { {"accept-unknown-input-arch", no_argument, NULL,
323 OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
324 '\0', NULL,
325 N_("Accept input files whose architecture cannot be determined"),
326 TWO_DASHES },
327 { {"no-accept-unknown-input-arch", no_argument, NULL,
328 OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
329 '\0', NULL, N_("Reject input files whose architecture is unknown"),
330 TWO_DASHES },
331 { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
332 '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
333 " following dynamic libs"),
334 TWO_DASHES },
335 { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
336 '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
337 " in following dynamic libs"),
338 TWO_DASHES },
339 { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
340 '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
341 TWO_DASHES },
342 { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
343 '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
344 TWO_DASHES },
345 { {"assert", required_argument, NULL, OPTION_ASSERT},
346 '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
347 { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
348 '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
349 { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
350 '\0', NULL, NULL, ONE_DASH },
351 { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
352 '\0', NULL, NULL, ONE_DASH },
353 { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
354 '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
355 { {"dn", no_argument, NULL, OPTION_NON_SHARED},
356 '\0', NULL, NULL, ONE_DASH },
357 { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
358 '\0', NULL, NULL, ONE_DASH },
359 { {"static", no_argument, NULL, OPTION_NON_SHARED},
360 '\0', NULL, NULL, ONE_DASH },
361 { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
362 '\0', NULL, N_("Bind global references locally"), ONE_DASH },
363 { {"Bsymbolic-functions", no_argument, NULL, OPTION_SYMBOLIC_FUNCTIONS},
364 '\0', NULL, N_("Bind global function references locally"), ONE_DASH },
365 { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
366 '\0', NULL, N_("Check section addresses for overlaps (default)"),
367 TWO_DASHES },
368 { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
369 '\0', NULL, N_("Do not check section addresses for overlaps"),
370 TWO_DASHES },
371 { {"cref", no_argument, NULL, OPTION_CREF},
372 '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
373 { {"defsym", required_argument, NULL, OPTION_DEFSYM},
374 '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
375 { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
376 '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
377 TWO_DASHES },
378 { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
379 '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
380 { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
381 '\0', NULL, N_("Treat warnings as errors"),
382 TWO_DASHES },
383 { {"no-fatal-warnings", no_argument, NULL, OPTION_NO_WARN_FATAL},
384 '\0', NULL, N_("Do not treat warnings as errors (default)"),
385 TWO_DASHES },
386 { {"fini", required_argument, NULL, OPTION_FINI},
387 '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
388 { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
389 '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
390 { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
391 '\0', NULL, N_("Remove unused sections (on some targets)"),
392 TWO_DASHES },
393 { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
394 '\0', NULL, N_("Don't remove unused sections (default)"),
395 TWO_DASHES },
396 { {"print-gc-sections", no_argument, NULL, OPTION_PRINT_GC_SECTIONS},
397 '\0', NULL, N_("List removed unused sections on stderr"),
398 TWO_DASHES },
399 { {"no-print-gc-sections", no_argument, NULL, OPTION_NO_PRINT_GC_SECTIONS},
400 '\0', NULL, N_("Do not list removed unused sections"),
401 TWO_DASHES },
402 { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
403 '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
404 TWO_DASHES },
405 { {"help", no_argument, NULL, OPTION_HELP},
406 '\0', NULL, N_("Print option help"), TWO_DASHES },
407 { {"init", required_argument, NULL, OPTION_INIT},
408 '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
409 { {"Map", required_argument, NULL, OPTION_MAP},
410 '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
411 { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
412 '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
413 { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
414 '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
415 { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
416 '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
417 { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
418 '\0', NULL, N_("Do not allow unresolved references in object files"),
419 TWO_DASHES },
420 { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
421 '\0', NULL, N_("Allow unresolved references in shared libaries"),
422 TWO_DASHES },
423 { {"no-allow-shlib-undefined", no_argument, NULL,
424 OPTION_NO_ALLOW_SHLIB_UNDEFINED},
425 '\0', NULL, N_("Do not allow unresolved references in shared libs"),
426 TWO_DASHES },
427 { {"allow-multiple-definition", no_argument, NULL,
428 OPTION_ALLOW_MULTIPLE_DEFINITION},
429 '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
430 { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
431 '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
432 { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
433 '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
434 { {"default-imported-symver", no_argument, NULL,
435 OPTION_DEFAULT_IMPORTED_SYMVER},
436 '\0', NULL, N_("Create default symbol version for imported symbols"),
437 TWO_DASHES },
438 { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
439 '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
440 { {"no-warn-search-mismatch", no_argument, NULL,
441 OPTION_NO_WARN_SEARCH_MISMATCH},
442 '\0', NULL, N_("Don't warn on finding an incompatible library"),
443 TWO_DASHES},
444 { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
445 '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
446 { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
447 '\0', NULL, N_("Create an output file even if errors occur"),
448 TWO_DASHES },
449 { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
450 '\0', NULL, NULL, NO_HELP },
451 { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
452 '\0', NULL, N_("Only use library directories specified on\n"
453 " the command line"),
454 ONE_DASH },
455 { {"oformat", required_argument, NULL, OPTION_OFORMAT},
456 '\0', N_("TARGET"), N_("Specify target of output file"),
457 EXACTLY_TWO_DASHES },
458 { {"qmagic", no_argument, NULL, OPTION_IGNORE},
459 '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
460 { {"reduce-memory-overheads", no_argument, NULL,
461 OPTION_REDUCE_MEMORY_OVERHEADS},
462 '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
463 TWO_DASHES },
464 { {"relax", no_argument, NULL, OPTION_RELAX},
465 '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
466 { {"retain-symbols-file", required_argument, NULL,
467 OPTION_RETAIN_SYMBOLS_FILE},
468 '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
469 { {"rpath", required_argument, NULL, OPTION_RPATH},
470 '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
471 { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
472 '\0', N_("PATH"), N_("Set link time shared library search path"),
473 ONE_DASH },
474 { {"shared", no_argument, NULL, OPTION_SHARED},
475 '\0', NULL, N_("Create a shared library"), ONE_DASH },
476 { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD. */
477 '\0', NULL, NULL, ONE_DASH },
478 { {"pie", no_argument, NULL, OPTION_PIE},
479 '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
480 { {"pic-executable", no_argument, NULL, OPTION_PIE},
481 '\0', NULL, NULL, TWO_DASHES },
482 { {"sort-common", optional_argument, NULL, OPTION_SORT_COMMON},
483 '\0', N_("[=ascending|descending]"),
484 N_("Sort common symbols by alignment [in specified order]"),
485 TWO_DASHES },
486 { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
487 '\0', NULL, NULL, NO_HELP },
488 { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
489 '\0', N_("name|alignment"),
490 N_("Sort sections by name or maximum alignment"), TWO_DASHES },
491 { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
492 '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
493 TWO_DASHES },
494 { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
495 '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
496 TWO_DASHES },
497 { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
498 '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
499 TWO_DASHES },
500 { {"stats", no_argument, NULL, OPTION_STATS},
501 '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
502 { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
503 '\0', NULL, N_("Display target specific options"), TWO_DASHES },
504 { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
505 '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
506 { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
507 '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
508 { {"section-start", required_argument, NULL, OPTION_SECTION_START},
509 '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
510 TWO_DASHES },
511 { {"Tbss", required_argument, NULL, OPTION_TBSS},
512 '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
513 { {"Tdata", required_argument, NULL, OPTION_TDATA},
514 '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
515 { {"Ttext", required_argument, NULL, OPTION_TTEXT},
516 '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
517 { {"Ttext-segment", required_argument, NULL, OPTION_TTEXT_SEGMENT},
518 '\0', N_("ADDRESS"), N_("Set address of text segment"), ONE_DASH },
519 { {"unresolved-symbols=<method>", required_argument, NULL,
520 OPTION_UNRESOLVED_SYMBOLS},
521 '\0', NULL, N_("How to handle unresolved symbols. <method> is:\n"
522 " ignore-all, report-all, ignore-in-object-files,\n"
523 " ignore-in-shared-libs"),
524 TWO_DASHES },
525 { {"verbose", no_argument, NULL, OPTION_VERBOSE},
526 '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
527 { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux. */
528 '\0', NULL, NULL, NO_HELP },
529 { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
530 '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
531 { {"version-exports-section", required_argument, NULL,
532 OPTION_VERSION_EXPORTS_SECTION },
533 '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
534 " SYMBOL as the version."),
535 TWO_DASHES },
536 { {"dynamic-list-data", no_argument, NULL, OPTION_DYNAMIC_LIST_DATA},
537 '\0', NULL, N_("Add data symbols to dynamic list"), TWO_DASHES },
538 { {"dynamic-list-cpp-new", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_NEW},
539 '\0', NULL, N_("Use C++ operator new/delete dynamic list"), TWO_DASHES },
540 { {"dynamic-list-cpp-typeinfo", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_TYPEINFO},
541 '\0', NULL, N_("Use C++ typeinfo dynamic list"), TWO_DASHES },
542 { {"dynamic-list", required_argument, NULL, OPTION_DYNAMIC_LIST},
543 '\0', N_("FILE"), N_("Read dynamic list"), TWO_DASHES },
544 { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
545 '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
546 { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
547 '\0', NULL, N_("Warn if global constructors/destructors are seen"),
548 TWO_DASHES },
549 { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
550 '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
551 { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
552 '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
553 { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
554 '\0', NULL, N_("Warn if start of section changes due to alignment"),
555 TWO_DASHES },
556 { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
557 '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
558 TWO_DASHES },
559 { {"warn-alternate-em", no_argument, NULL, OPTION_WARN_ALTERNATE_EM},
560 '\0', NULL, N_("Warn if an object has alternate ELF machine code"),
561 TWO_DASHES },
562 { {"warn-unresolved-symbols", no_argument, NULL,
563 OPTION_WARN_UNRESOLVED_SYMBOLS},
564 '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
565 { {"error-unresolved-symbols", no_argument, NULL,
566 OPTION_ERROR_UNRESOLVED_SYMBOLS},
567 '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
568 { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
569 '\0', NULL, N_("Include all objects from following archives"),
570 TWO_DASHES },
571 { {"wrap", required_argument, NULL, OPTION_WRAP},
572 '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
573 };
574
575 #define OPTION_COUNT ARRAY_SIZE (ld_options)
576
577 void
578 parse_args (unsigned argc, char **argv)
579 {
580 unsigned i;
581 int is, il, irl;
582 int ingroup = 0;
583 char *default_dirlist = NULL;
584 char *shortopts;
585 struct option *longopts;
586 struct option *really_longopts;
587 int last_optind;
588 enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
589
590 shortopts = xmalloc (OPTION_COUNT * 3 + 2);
591 longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
592 really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
593
594 /* Starting the short option string with '-' is for programs that
595 expect options and other ARGV-elements in any order and that care about
596 the ordering of the two. We describe each non-option ARGV-element
597 as if it were the argument of an option with character code 1. */
598 shortopts[0] = '-';
599 is = 1;
600 il = 0;
601 irl = 0;
602 for (i = 0; i < OPTION_COUNT; i++)
603 {
604 if (ld_options[i].shortopt != '\0')
605 {
606 shortopts[is] = ld_options[i].shortopt;
607 ++is;
608 if (ld_options[i].opt.has_arg == required_argument
609 || ld_options[i].opt.has_arg == optional_argument)
610 {
611 shortopts[is] = ':';
612 ++is;
613 if (ld_options[i].opt.has_arg == optional_argument)
614 {
615 shortopts[is] = ':';
616 ++is;
617 }
618 }
619 }
620 if (ld_options[i].opt.name != NULL)
621 {
622 if (ld_options[i].control == EXACTLY_TWO_DASHES)
623 {
624 really_longopts[irl] = ld_options[i].opt;
625 ++irl;
626 }
627 else
628 {
629 longopts[il] = ld_options[i].opt;
630 ++il;
631 }
632 }
633 }
634 shortopts[is] = '\0';
635 longopts[il].name = NULL;
636 really_longopts[irl].name = NULL;
637
638 ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
639
640 /* The -G option is ambiguous on different platforms. Sometimes it
641 specifies the largest data size to put into the small data
642 section. Sometimes it is equivalent to --shared. Unfortunately,
643 the first form takes an argument, while the second does not.
644
645 We need to permit the --shared form because on some platforms,
646 such as Solaris, gcc -shared will pass -G to the linker.
647
648 To permit either usage, we look through the argument list. If we
649 find -G not followed by a number, we change it into --shared.
650 This will work for most normal cases. */
651 for (i = 1; i < argc; i++)
652 if (strcmp (argv[i], "-G") == 0
653 && (i + 1 >= argc
654 || ! ISDIGIT (argv[i + 1][0])))
655 argv[i] = (char *) "--shared";
656
657 /* Because we permit long options to start with a single dash, and
658 we have a --library option, and the -l option is conventionally
659 used with an immediately following argument, we can have bad
660 results if somebody tries to use -l with a library whose name
661 happens to start with "ibrary", as in -li. We avoid problems by
662 simply turning -l into --library. This means that users will
663 have to use two dashes in order to use --library, which is OK
664 since that's how it is documented.
665
666 FIXME: It's possible that this problem can arise for other short
667 options as well, although the user does always have the recourse
668 of adding a space between the option and the argument. */
669 for (i = 1; i < argc; i++)
670 {
671 if (argv[i][0] == '-'
672 && argv[i][1] == 'l'
673 && argv[i][2] != '\0')
674 {
675 char *n;
676
677 n = xmalloc (strlen (argv[i]) + 20);
678 sprintf (n, "--library=%s", argv[i] + 2);
679 argv[i] = n;
680 }
681 }
682
683 last_optind = -1;
684 while (1)
685 {
686 int longind;
687 int optc;
688
689 /* Using last_optind lets us avoid calling ldemul_parse_args
690 multiple times on a single option, which would lead to
691 confusion in the internal static variables maintained by
692 getopt. This could otherwise happen for an argument like
693 -nx, in which the -n is parsed as a single option, and we
694 loop around to pick up the -x. */
695 if (optind != last_optind)
696 if (ldemul_parse_args (argc, argv))
697 continue;
698
699 /* getopt_long_only is like getopt_long, but '-' as well as '--'
700 can indicate a long option. */
701 opterr = 0;
702 last_optind = optind;
703 optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
704 if (optc == '?')
705 {
706 optind = last_optind;
707 optc = getopt_long (argc, argv, "-", really_longopts, &longind);
708 }
709
710 if (ldemul_handle_option (optc))
711 continue;
712
713 if (optc == -1)
714 break;
715
716 switch (optc)
717 {
718 case '?':
719 einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
720 /* Fall through. */
721
722 default:
723 einfo (_("%P%F: use the --help option for usage information\n"));
724
725 case 1: /* File name. */
726 lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
727 break;
728
729 case OPTION_IGNORE:
730 break;
731 case 'a':
732 /* For HP/UX compatibility. Actually -a shared should mean
733 ``use only shared libraries'' but, then, we don't
734 currently support shared libraries on HP/UX anyhow. */
735 if (strcmp (optarg, "archive") == 0)
736 config.dynamic_link = FALSE;
737 else if (strcmp (optarg, "shared") == 0
738 || strcmp (optarg, "default") == 0)
739 config.dynamic_link = TRUE;
740 else
741 einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
742 break;
743 case OPTION_ASSERT:
744 /* FIXME: We just ignore these, but we should handle them. */
745 if (strcmp (optarg, "definitions") == 0)
746 ;
747 else if (strcmp (optarg, "nodefinitions") == 0)
748 ;
749 else if (strcmp (optarg, "nosymbolic") == 0)
750 ;
751 else if (strcmp (optarg, "pure-text") == 0)
752 ;
753 else
754 einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
755 break;
756 case 'A':
757 ldfile_add_arch (optarg);
758 break;
759 case 'b':
760 lang_add_target (optarg);
761 break;
762 case 'c':
763 ldfile_open_command_file (optarg);
764 parser_input = input_mri_script;
765 yyparse ();
766 break;
767 case OPTION_CALL_SHARED:
768 config.dynamic_link = TRUE;
769 break;
770 case OPTION_NON_SHARED:
771 config.dynamic_link = FALSE;
772 break;
773 case OPTION_CREF:
774 command_line.cref = TRUE;
775 link_info.notice_all = TRUE;
776 break;
777 case 'd':
778 command_line.force_common_definition = TRUE;
779 break;
780 case OPTION_DEFSYM:
781 lex_string = optarg;
782 lex_redirect (optarg);
783 parser_input = input_defsym;
784 parsing_defsym = 1;
785 yyparse ();
786 parsing_defsym = 0;
787 lex_string = NULL;
788 break;
789 case OPTION_DEMANGLE:
790 demangling = TRUE;
791 if (optarg != NULL)
792 {
793 enum demangling_styles style;
794
795 style = cplus_demangle_name_to_style (optarg);
796 if (style == unknown_demangling)
797 einfo (_("%F%P: unknown demangling style `%s'"),
798 optarg);
799
800 cplus_demangle_set_style (style);
801 }
802 break;
803 case 'I': /* Used on Solaris. */
804 case OPTION_DYNAMIC_LINKER:
805 command_line.interpreter = optarg;
806 break;
807 case OPTION_SYSROOT:
808 /* Already handled in ldmain.c. */
809 break;
810 case OPTION_EB:
811 command_line.endian = ENDIAN_BIG;
812 break;
813 case OPTION_EL:
814 command_line.endian = ENDIAN_LITTLE;
815 break;
816 case OPTION_EMBEDDED_RELOCS:
817 command_line.embedded_relocs = TRUE;
818 break;
819 case OPTION_EXPORT_DYNAMIC:
820 case 'E': /* HP/UX compatibility. */
821 link_info.export_dynamic = TRUE;
822 break;
823 case 'e':
824 lang_add_entry (optarg, TRUE);
825 ldlang_add_undef (optarg);
826 break;
827 case 'f':
828 if (command_line.auxiliary_filters == NULL)
829 {
830 command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
831 command_line.auxiliary_filters[0] = optarg;
832 command_line.auxiliary_filters[1] = NULL;
833 }
834 else
835 {
836 int c;
837 char **p;
838
839 c = 0;
840 for (p = command_line.auxiliary_filters; *p != NULL; p++)
841 ++c;
842 command_line.auxiliary_filters
843 = xrealloc (command_line.auxiliary_filters,
844 (c + 2) * sizeof (char *));
845 command_line.auxiliary_filters[c] = optarg;
846 command_line.auxiliary_filters[c + 1] = NULL;
847 }
848 break;
849 case 'F':
850 command_line.filter_shlib = optarg;
851 break;
852 case OPTION_FORCE_EXE_SUFFIX:
853 command_line.force_exe_suffix = TRUE;
854 break;
855 case 'G':
856 {
857 char *end;
858 g_switch_value = strtoul (optarg, &end, 0);
859 if (*end)
860 einfo (_("%P%F: invalid number `%s'\n"), optarg);
861 }
862 break;
863 case 'g':
864 /* Ignore. */
865 break;
866 case OPTION_GC_SECTIONS:
867 link_info.gc_sections = TRUE;
868 break;
869 case OPTION_PRINT_GC_SECTIONS:
870 link_info.print_gc_sections = TRUE;
871 break;
872 case OPTION_HELP:
873 help ();
874 xexit (0);
875 break;
876 case 'L':
877 ldfile_add_library_path (optarg, TRUE);
878 break;
879 case 'l':
880 lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
881 break;
882 case 'M':
883 config.map_filename = "-";
884 break;
885 case 'm':
886 /* Ignore. Was handled in a pre-parse. */
887 break;
888 case OPTION_MAP:
889 config.map_filename = optarg;
890 break;
891 case 'N':
892 config.text_read_only = FALSE;
893 config.magic_demand_paged = FALSE;
894 config.dynamic_link = FALSE;
895 break;
896 case OPTION_NO_OMAGIC:
897 config.text_read_only = TRUE;
898 config.magic_demand_paged = TRUE;
899 /* NB/ Does not set dynamic_link to TRUE.
900 Use --call-shared or -Bdynamic for this. */
901 break;
902 case 'n':
903 config.magic_demand_paged = FALSE;
904 config.dynamic_link = FALSE;
905 break;
906 case OPTION_NO_DEFINE_COMMON:
907 command_line.inhibit_common_definition = TRUE;
908 break;
909 case OPTION_NO_DEMANGLE:
910 demangling = FALSE;
911 break;
912 case OPTION_NO_GC_SECTIONS:
913 link_info.gc_sections = FALSE;
914 break;
915 case OPTION_NO_PRINT_GC_SECTIONS:
916 link_info.print_gc_sections = FALSE;
917 break;
918 case OPTION_NO_KEEP_MEMORY:
919 link_info.keep_memory = FALSE;
920 break;
921 case OPTION_NO_UNDEFINED:
922 link_info.unresolved_syms_in_objects
923 = how_to_report_unresolved_symbols;
924 break;
925 case OPTION_ALLOW_SHLIB_UNDEFINED:
926 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
927 break;
928 case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
929 link_info.unresolved_syms_in_shared_libs
930 = how_to_report_unresolved_symbols;
931 break;
932 case OPTION_UNRESOLVED_SYMBOLS:
933 if (strcmp (optarg, "ignore-all") == 0)
934 {
935 link_info.unresolved_syms_in_objects = RM_IGNORE;
936 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
937 }
938 else if (strcmp (optarg, "report-all") == 0)
939 {
940 link_info.unresolved_syms_in_objects
941 = how_to_report_unresolved_symbols;
942 link_info.unresolved_syms_in_shared_libs
943 = how_to_report_unresolved_symbols;
944 }
945 else if (strcmp (optarg, "ignore-in-object-files") == 0)
946 {
947 link_info.unresolved_syms_in_objects = RM_IGNORE;
948 link_info.unresolved_syms_in_shared_libs
949 = how_to_report_unresolved_symbols;
950 }
951 else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
952 {
953 link_info.unresolved_syms_in_objects
954 = how_to_report_unresolved_symbols;
955 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
956 }
957 else
958 einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
959 break;
960 case OPTION_WARN_UNRESOLVED_SYMBOLS:
961 how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
962 if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
963 link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
964 if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
965 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
966 break;
967
968 case OPTION_ERROR_UNRESOLVED_SYMBOLS:
969 how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
970 if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
971 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
972 if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
973 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
974 break;
975 case OPTION_ALLOW_MULTIPLE_DEFINITION:
976 link_info.allow_multiple_definition = TRUE;
977 break;
978 case OPTION_NO_UNDEFINED_VERSION:
979 link_info.allow_undefined_version = FALSE;
980 break;
981 case OPTION_DEFAULT_SYMVER:
982 link_info.create_default_symver = TRUE;
983 break;
984 case OPTION_DEFAULT_IMPORTED_SYMVER:
985 link_info.default_imported_symver = TRUE;
986 break;
987 case OPTION_NO_WARN_MISMATCH:
988 command_line.warn_mismatch = FALSE;
989 break;
990 case OPTION_NO_WARN_SEARCH_MISMATCH:
991 command_line.warn_search_mismatch = FALSE;
992 break;
993 case OPTION_NOINHIBIT_EXEC:
994 force_make_executable = TRUE;
995 break;
996 case OPTION_NOSTDLIB:
997 config.only_cmd_line_lib_dirs = TRUE;
998 break;
999 case OPTION_NO_WHOLE_ARCHIVE:
1000 whole_archive = FALSE;
1001 break;
1002 case 'O':
1003 /* FIXME "-O<non-digits> <value>" used to set the address of
1004 section <non-digits>. Was this for compatibility with
1005 something, or can we create a new option to do that
1006 (with a syntax similar to -defsym)?
1007 getopt can't handle two args to an option without kludges. */
1008
1009 /* Enable optimizations of output files. */
1010 link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
1011 break;
1012 case 'o':
1013 lang_add_output (optarg, 0);
1014 break;
1015 case OPTION_OFORMAT:
1016 lang_add_output_format (optarg, NULL, NULL, 0);
1017 break;
1018 case 'q':
1019 link_info.emitrelocations = TRUE;
1020 break;
1021 case 'i':
1022 case 'r':
1023 if (optind == last_optind)
1024 /* This can happen if the user put "-rpath,a" on the command
1025 line. (Or something similar. The comma is important).
1026 Getopt becomes confused and thinks that this is a -r option
1027 but it cannot parse the text after the -r so it refuses to
1028 increment the optind counter. Detect this case and issue
1029 an error message here. We cannot just make this a warning,
1030 increment optind, and continue because getopt is too confused
1031 and will seg-fault the next time around. */
1032 einfo(_("%P%F: bad -rpath option\n"));
1033
1034 link_info.relocatable = TRUE;
1035 config.build_constructors = FALSE;
1036 config.magic_demand_paged = FALSE;
1037 config.text_read_only = FALSE;
1038 config.dynamic_link = FALSE;
1039 break;
1040 case 'R':
1041 /* The GNU linker traditionally uses -R to mean to include
1042 only the symbols from a file. The Solaris linker uses -R
1043 to set the path used by the runtime linker to find
1044 libraries. This is the GNU linker -rpath argument. We
1045 try to support both simultaneously by checking the file
1046 named. If it is a directory, rather than a regular file,
1047 we assume -rpath was meant. */
1048 {
1049 struct stat s;
1050
1051 if (stat (optarg, &s) >= 0
1052 && ! S_ISDIR (s.st_mode))
1053 {
1054 lang_add_input_file (optarg,
1055 lang_input_file_is_symbols_only_enum,
1056 NULL);
1057 break;
1058 }
1059 }
1060 /* Fall through. */
1061 case OPTION_RPATH:
1062 if (command_line.rpath == NULL)
1063 command_line.rpath = xstrdup (optarg);
1064 else
1065 {
1066 size_t rpath_len = strlen (command_line.rpath);
1067 size_t optarg_len = strlen (optarg);
1068 char *buf;
1069 char *cp = command_line.rpath;
1070
1071 /* First see whether OPTARG is already in the path. */
1072 do
1073 {
1074 if (strncmp (optarg, cp, optarg_len) == 0
1075 && (cp[optarg_len] == 0
1076 || cp[optarg_len] == config.rpath_separator))
1077 /* We found it. */
1078 break;
1079
1080 /* Not yet found. */
1081 cp = strchr (cp, config.rpath_separator);
1082 if (cp != NULL)
1083 ++cp;
1084 }
1085 while (cp != NULL);
1086
1087 if (cp == NULL)
1088 {
1089 buf = xmalloc (rpath_len + optarg_len + 2);
1090 sprintf (buf, "%s%c%s", command_line.rpath,
1091 config.rpath_separator, optarg);
1092 free (command_line.rpath);
1093 command_line.rpath = buf;
1094 }
1095 }
1096 break;
1097 case OPTION_RPATH_LINK:
1098 if (command_line.rpath_link == NULL)
1099 command_line.rpath_link = xstrdup (optarg);
1100 else
1101 {
1102 char *buf;
1103
1104 buf = xmalloc (strlen (command_line.rpath_link)
1105 + strlen (optarg)
1106 + 2);
1107 sprintf (buf, "%s%c%s", command_line.rpath_link,
1108 config.rpath_separator, optarg);
1109 free (command_line.rpath_link);
1110 command_line.rpath_link = buf;
1111 }
1112 break;
1113 case OPTION_RELAX:
1114 command_line.relax = TRUE;
1115 break;
1116 case OPTION_RETAIN_SYMBOLS_FILE:
1117 add_keepsyms_file (optarg);
1118 break;
1119 case 'S':
1120 link_info.strip = strip_debugger;
1121 break;
1122 case 's':
1123 link_info.strip = strip_all;
1124 break;
1125 case OPTION_STRIP_DISCARDED:
1126 link_info.strip_discarded = TRUE;
1127 break;
1128 case OPTION_NO_STRIP_DISCARDED:
1129 link_info.strip_discarded = FALSE;
1130 break;
1131 case OPTION_SHARED:
1132 if (config.has_shared)
1133 {
1134 link_info.shared = TRUE;
1135 /* When creating a shared library, the default
1136 behaviour is to ignore any unresolved references. */
1137 if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1138 link_info.unresolved_syms_in_objects = RM_IGNORE;
1139 if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1140 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1141 }
1142 else
1143 einfo (_("%P%F: -shared not supported\n"));
1144 break;
1145 case OPTION_PIE:
1146 if (config.has_shared)
1147 {
1148 link_info.shared = TRUE;
1149 link_info.pie = TRUE;
1150 }
1151 else
1152 einfo (_("%P%F: -pie not supported\n"));
1153 break;
1154 case 'h': /* Used on Solaris. */
1155 case OPTION_SONAME:
1156 command_line.soname = optarg;
1157 break;
1158 case OPTION_SORT_COMMON:
1159 if (optarg == NULL
1160 || strcmp (optarg, N_("descending")) == 0)
1161 config.sort_common = sort_descending;
1162 else if (strcmp (optarg, N_("ascending")) == 0)
1163 config.sort_common = sort_ascending;
1164 else
1165 einfo (_("%P%F: invalid common section sorting option: %s\n"),
1166 optarg);
1167 break;
1168 case OPTION_SORT_SECTION:
1169 if (strcmp (optarg, N_("name")) == 0)
1170 sort_section = by_name;
1171 else if (strcmp (optarg, N_("alignment")) == 0)
1172 sort_section = by_alignment;
1173 else
1174 einfo (_("%P%F: invalid section sorting option: %s\n"),
1175 optarg);
1176 break;
1177 case OPTION_STATS:
1178 config.stats = TRUE;
1179 break;
1180 case OPTION_SYMBOLIC:
1181 command_line.symbolic = symbolic;
1182 break;
1183 case OPTION_SYMBOLIC_FUNCTIONS:
1184 command_line.symbolic = symbolic_functions;
1185 break;
1186 case 't':
1187 trace_files = TRUE;
1188 break;
1189 case 'T':
1190 previous_script_handle = saved_script_handle;
1191 ldfile_open_command_file (optarg);
1192 parser_input = input_script;
1193 yyparse ();
1194 previous_script_handle = NULL;
1195 break;
1196 case OPTION_DEFAULT_SCRIPT:
1197 command_line.default_script = optarg;
1198 break;
1199 case OPTION_SECTION_START:
1200 {
1201 char *optarg2;
1202 char *sec_name;
1203 int len;
1204
1205 /* Check for <something>=<somthing>... */
1206 optarg2 = strchr (optarg, '=');
1207 if (optarg2 == NULL)
1208 einfo (_("%P%F: invalid argument to option"
1209 " \"--section-start\"\n"));
1210
1211 optarg2++;
1212
1213 /* So far so good. Are all the args present? */
1214 if ((*optarg == '\0') || (*optarg2 == '\0'))
1215 einfo (_("%P%F: missing argument(s) to option"
1216 " \"--section-start\"\n"));
1217
1218 /* We must copy the section name as set_section_start
1219 doesn't do it for us. */
1220 len = optarg2 - optarg;
1221 sec_name = xmalloc (len);
1222 memcpy (sec_name, optarg, len - 1);
1223 sec_name[len - 1] = 0;
1224
1225 /* Then set it... */
1226 set_section_start (sec_name, optarg2);
1227 }
1228 break;
1229 case OPTION_TARGET_HELP:
1230 /* Mention any target specific options. */
1231 ldemul_list_emulation_options (stdout);
1232 exit (0);
1233 case OPTION_TBSS:
1234 set_segment_start (".bss", optarg);
1235 break;
1236 case OPTION_TDATA:
1237 set_segment_start (".data", optarg);
1238 break;
1239 case OPTION_TTEXT:
1240 set_segment_start (".text", optarg);
1241 break;
1242 case OPTION_TTEXT_SEGMENT:
1243 set_segment_start (".text-segment", optarg);
1244 break;
1245 case OPTION_TRADITIONAL_FORMAT:
1246 link_info.traditional_format = TRUE;
1247 break;
1248 case OPTION_TASK_LINK:
1249 link_info.task_link = TRUE;
1250 /* Fall through - do an implied -r option. */
1251 case OPTION_UR:
1252 link_info.relocatable = TRUE;
1253 config.build_constructors = TRUE;
1254 config.magic_demand_paged = FALSE;
1255 config.text_read_only = FALSE;
1256 config.dynamic_link = FALSE;
1257 break;
1258 case 'u':
1259 ldlang_add_undef (optarg);
1260 break;
1261 case OPTION_UNIQUE:
1262 if (optarg != NULL)
1263 lang_add_unique (optarg);
1264 else
1265 config.unique_orphan_sections = TRUE;
1266 break;
1267 case OPTION_VERBOSE:
1268 ldversion (1);
1269 version_printed = TRUE;
1270 trace_file_tries = TRUE;
1271 overflow_cutoff_limit = -2;
1272 break;
1273 case 'v':
1274 ldversion (0);
1275 version_printed = TRUE;
1276 break;
1277 case 'V':
1278 ldversion (1);
1279 version_printed = TRUE;
1280 break;
1281 case OPTION_VERSION:
1282 ldversion (2);
1283 xexit (0);
1284 break;
1285 case OPTION_VERSION_SCRIPT:
1286 /* This option indicates a small script that only specifies
1287 version information. Read it, but don't assume that
1288 we've seen a linker script. */
1289 {
1290 FILE *hold_script_handle;
1291
1292 hold_script_handle = saved_script_handle;
1293 ldfile_open_command_file (optarg);
1294 saved_script_handle = hold_script_handle;
1295 parser_input = input_version_script;
1296 yyparse ();
1297 }
1298 break;
1299 case OPTION_VERSION_EXPORTS_SECTION:
1300 /* This option records a version symbol to be applied to the
1301 symbols listed for export to be found in the object files
1302 .exports sections. */
1303 command_line.version_exports_section = optarg;
1304 break;
1305 case OPTION_DYNAMIC_LIST_DATA:
1306 command_line.dynamic_list = dynamic_list_data;
1307 if (command_line.symbolic == symbolic)
1308 command_line.symbolic = symbolic_unset;
1309 break;
1310 case OPTION_DYNAMIC_LIST_CPP_TYPEINFO:
1311 lang_append_dynamic_list_cpp_typeinfo ();
1312 if (command_line.dynamic_list != dynamic_list_data)
1313 command_line.dynamic_list = dynamic_list;
1314 if (command_line.symbolic == symbolic)
1315 command_line.symbolic = symbolic_unset;
1316 break;
1317 case OPTION_DYNAMIC_LIST_CPP_NEW:
1318 lang_append_dynamic_list_cpp_new ();
1319 if (command_line.dynamic_list != dynamic_list_data)
1320 command_line.dynamic_list = dynamic_list;
1321 if (command_line.symbolic == symbolic)
1322 command_line.symbolic = symbolic_unset;
1323 break;
1324 case OPTION_DYNAMIC_LIST:
1325 /* This option indicates a small script that only specifies
1326 a dynamic list. Read it, but don't assume that we've
1327 seen a linker script. */
1328 {
1329 FILE *hold_script_handle;
1330
1331 hold_script_handle = saved_script_handle;
1332 ldfile_open_command_file (optarg);
1333 saved_script_handle = hold_script_handle;
1334 parser_input = input_dynamic_list;
1335 yyparse ();
1336 }
1337 if (command_line.dynamic_list != dynamic_list_data)
1338 command_line.dynamic_list = dynamic_list;
1339 if (command_line.symbolic == symbolic)
1340 command_line.symbolic = symbolic_unset;
1341 break;
1342 case OPTION_WARN_COMMON:
1343 config.warn_common = TRUE;
1344 break;
1345 case OPTION_WARN_CONSTRUCTORS:
1346 config.warn_constructors = TRUE;
1347 break;
1348 case OPTION_WARN_FATAL:
1349 config.fatal_warnings = TRUE;
1350 break;
1351 case OPTION_NO_WARN_FATAL:
1352 config.fatal_warnings = FALSE;
1353 break;
1354 case OPTION_WARN_MULTIPLE_GP:
1355 config.warn_multiple_gp = TRUE;
1356 break;
1357 case OPTION_WARN_ONCE:
1358 config.warn_once = TRUE;
1359 break;
1360 case OPTION_WARN_SECTION_ALIGN:
1361 config.warn_section_align = TRUE;
1362 break;
1363 case OPTION_WARN_SHARED_TEXTREL:
1364 link_info.warn_shared_textrel = TRUE;
1365 break;
1366 case OPTION_WARN_ALTERNATE_EM:
1367 link_info.warn_alternate_em = TRUE;
1368 break;
1369 case OPTION_WHOLE_ARCHIVE:
1370 whole_archive = TRUE;
1371 break;
1372 case OPTION_ADD_NEEDED:
1373 add_needed = TRUE;
1374 break;
1375 case OPTION_NO_ADD_NEEDED:
1376 add_needed = FALSE;
1377 break;
1378 case OPTION_AS_NEEDED:
1379 as_needed = TRUE;
1380 break;
1381 case OPTION_NO_AS_NEEDED:
1382 as_needed = FALSE;
1383 break;
1384 case OPTION_WRAP:
1385 add_wrap (optarg);
1386 break;
1387 case OPTION_DISCARD_NONE:
1388 link_info.discard = discard_none;
1389 break;
1390 case 'X':
1391 link_info.discard = discard_l;
1392 break;
1393 case 'x':
1394 link_info.discard = discard_all;
1395 break;
1396 case 'Y':
1397 if (CONST_STRNEQ (optarg, "P,"))
1398 optarg += 2;
1399 if (default_dirlist != NULL)
1400 free (default_dirlist);
1401 default_dirlist = xstrdup (optarg);
1402 break;
1403 case 'y':
1404 add_ysym (optarg);
1405 break;
1406 case OPTION_SPARE_DYNAMIC_TAGS:
1407 link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1408 break;
1409 case OPTION_SPLIT_BY_RELOC:
1410 if (optarg != NULL)
1411 config.split_by_reloc = strtoul (optarg, NULL, 0);
1412 else
1413 config.split_by_reloc = 32768;
1414 break;
1415 case OPTION_SPLIT_BY_FILE:
1416 if (optarg != NULL)
1417 config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1418 else
1419 config.split_by_file = 1;
1420 break;
1421 case OPTION_CHECK_SECTIONS:
1422 command_line.check_section_addresses = 1;
1423 break;
1424 case OPTION_NO_CHECK_SECTIONS:
1425 command_line.check_section_addresses = 0;
1426 break;
1427 case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1428 command_line.accept_unknown_input_arch = TRUE;
1429 break;
1430 case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1431 command_line.accept_unknown_input_arch = FALSE;
1432 break;
1433 case '(':
1434 if (ingroup)
1435 einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1436
1437 lang_enter_group ();
1438 ingroup = 1;
1439 break;
1440 case ')':
1441 if (! ingroup)
1442 einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1443
1444 lang_leave_group ();
1445 ingroup = 0;
1446 break;
1447
1448 case OPTION_INIT:
1449 link_info.init_function = optarg;
1450 break;
1451
1452 case OPTION_FINI:
1453 link_info.fini_function = optarg;
1454 break;
1455
1456 case OPTION_REDUCE_MEMORY_OVERHEADS:
1457 link_info.reduce_memory_overheads = TRUE;
1458 if (config.hash_table_size == 0)
1459 config.hash_table_size = 1021;
1460 break;
1461
1462 case OPTION_HASH_SIZE:
1463 {
1464 bfd_size_type new_size;
1465
1466 new_size = strtoul (optarg, NULL, 0);
1467 if (new_size)
1468 config.hash_table_size = new_size;
1469 else
1470 einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1471 }
1472 break;
1473 }
1474 }
1475
1476 if (ingroup)
1477 lang_leave_group ();
1478
1479 if (default_dirlist != NULL)
1480 {
1481 set_default_dirlist (default_dirlist);
1482 free (default_dirlist);
1483 }
1484
1485 if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1486 /* FIXME: Should we allow emulations a chance to set this ? */
1487 link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1488
1489 if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1490 /* FIXME: Should we allow emulations a chance to set this ? */
1491 link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1492 }
1493
1494 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1495 library search path. */
1496
1497 static void
1498 set_default_dirlist (char *dirlist_ptr)
1499 {
1500 char *p;
1501
1502 while (1)
1503 {
1504 p = strchr (dirlist_ptr, PATH_SEPARATOR);
1505 if (p != NULL)
1506 *p = '\0';
1507 if (*dirlist_ptr != '\0')
1508 ldfile_add_library_path (dirlist_ptr, TRUE);
1509 if (p == NULL)
1510 break;
1511 dirlist_ptr = p + 1;
1512 }
1513 }
1514
1515 static void
1516 set_section_start (char *sect, char *valstr)
1517 {
1518 const char *end;
1519 bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1520 if (*end)
1521 einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1522 lang_section_start (sect, exp_intop (val), NULL);
1523 }
1524
1525 static void
1526 set_segment_start (const char *section, char *valstr)
1527 {
1528 const char *name;
1529 const char *end;
1530 segment_type *seg;
1531
1532 bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1533 if (*end)
1534 einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1535 /* If we already have an entry for this segment, update the existing
1536 value. */
1537 name = section + 1;
1538 for (seg = segments; seg; seg = seg->next)
1539 if (strcmp (seg->name, name) == 0)
1540 {
1541 seg->value = val;
1542 return;
1543 }
1544 /* There was no existing value so we must create a new segment
1545 entry. */
1546 seg = stat_alloc (sizeof (*seg));
1547 seg->name = name;
1548 seg->value = val;
1549 seg->used = FALSE;
1550 /* Add it to the linked list of segments. */
1551 seg->next = segments;
1552 segments = seg;
1553 /* Historically, -Ttext and friends set the base address of a
1554 particular section. For backwards compatibility, we still do
1555 that. If a SEGMENT_START directive is seen, the section address
1556 assignment will be disabled. */
1557 lang_section_start (section, exp_intop (val), seg);
1558 }
1559
1560 \f
1561 /* Print help messages for the options. */
1562
1563 static void
1564 help (void)
1565 {
1566 unsigned i;
1567 const char **targets, **pp;
1568 int len;
1569
1570 printf (_("Usage: %s [options] file...\n"), program_name);
1571
1572 printf (_("Options:\n"));
1573 for (i = 0; i < OPTION_COUNT; i++)
1574 {
1575 if (ld_options[i].doc != NULL)
1576 {
1577 bfd_boolean comma;
1578 unsigned j;
1579
1580 printf (" ");
1581
1582 comma = FALSE;
1583 len = 2;
1584
1585 j = i;
1586 do
1587 {
1588 if (ld_options[j].shortopt != '\0'
1589 && ld_options[j].control != NO_HELP)
1590 {
1591 printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1592 len += (comma ? 2 : 0) + 2;
1593 if (ld_options[j].arg != NULL)
1594 {
1595 if (ld_options[j].opt.has_arg != optional_argument)
1596 {
1597 printf (" ");
1598 ++len;
1599 }
1600 printf ("%s", _(ld_options[j].arg));
1601 len += strlen (_(ld_options[j].arg));
1602 }
1603 comma = TRUE;
1604 }
1605 ++j;
1606 }
1607 while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1608
1609 j = i;
1610 do
1611 {
1612 if (ld_options[j].opt.name != NULL
1613 && ld_options[j].control != NO_HELP)
1614 {
1615 int two_dashes =
1616 (ld_options[j].control == TWO_DASHES
1617 || ld_options[j].control == EXACTLY_TWO_DASHES);
1618
1619 printf ("%s-%s%s",
1620 comma ? ", " : "",
1621 two_dashes ? "-" : "",
1622 ld_options[j].opt.name);
1623 len += ((comma ? 2 : 0)
1624 + 1
1625 + (two_dashes ? 1 : 0)
1626 + strlen (ld_options[j].opt.name));
1627 if (ld_options[j].arg != NULL)
1628 {
1629 printf (" %s", _(ld_options[j].arg));
1630 len += 1 + strlen (_(ld_options[j].arg));
1631 }
1632 comma = TRUE;
1633 }
1634 ++j;
1635 }
1636 while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1637
1638 if (len >= 30)
1639 {
1640 printf ("\n");
1641 len = 0;
1642 }
1643
1644 for (; len < 30; len++)
1645 putchar (' ');
1646
1647 printf ("%s\n", _(ld_options[i].doc));
1648 }
1649 }
1650 printf (_(" @FILE"));
1651 for (len = strlen (" @FILE"); len < 30; len++)
1652 putchar (' ');
1653 printf (_("Read options from FILE\n"));
1654
1655 /* Note: Various tools (such as libtool) depend upon the
1656 format of the listings below - do not change them. */
1657 /* xgettext:c-format */
1658 printf (_("%s: supported targets:"), program_name);
1659 targets = bfd_target_list ();
1660 for (pp = targets; *pp != NULL; pp++)
1661 printf (" %s", *pp);
1662 free (targets);
1663 printf ("\n");
1664
1665 /* xgettext:c-format */
1666 printf (_("%s: supported emulations: "), program_name);
1667 ldemul_list_emulations (stdout);
1668 printf ("\n");
1669
1670 /* xgettext:c-format */
1671 printf (_("%s: emulation specific options:\n"), program_name);
1672 ldemul_list_emulation_options (stdout);
1673 printf ("\n");
1674
1675 if (REPORT_BUGS_TO[0])
1676 printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1677 }
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