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