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, 59 Temple Place - Suite 330, Boston, MA
21 02111-1307, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libiberty.h"
26 #include <stdio.h>
27 #include <string.h>
28 #include "safe-ctype.h"
29 #include "getopt.h"
30 #include "bfdlink.h"
31 #include "ld.h"
32 #include "ldmain.h"
33 #include "ldmisc.h"
34 #include "ldexp.h"
35 #include "ldlang.h"
36 #include <ldgram.h>
37 #include "ldlex.h"
38 #include "ldfile.h"
39 #include "ldver.h"
40 #include "ldemul.h"
41 #include "demangle.h"
42
43 #ifndef PATH_SEPARATOR
44 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
45 #define PATH_SEPARATOR ';'
46 #else
47 #define PATH_SEPARATOR ':'
48 #endif
49 #endif
50
51 /* Somewhere above, sys/stat.h got included . . . . */
52 #if !defined(S_ISDIR) && defined(S_IFDIR)
53 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
54 #endif
55
56 static void set_default_dirlist (char *);
57 static void set_section_start (char *, char *);
58 static void set_segment_start (const char *, char *);
59 static void help (void);
60
61 /* Non-zero if we are processing a --defsym from the command line. */
62 int parsing_defsym = 0;
63
64 /* Codes used for the long options with no short synonyms. 150 isn't
65 special; it's just an arbitrary non-ASCII char value. */
66 enum option_values
67 {
68 OPTION_ASSERT = 150,
69 OPTION_CALL_SHARED,
70 OPTION_CREF,
71 OPTION_DEFSYM,
72 OPTION_DEMANGLE,
73 OPTION_DYNAMIC_LINKER,
74 OPTION_SYSROOT,
75 OPTION_EB,
76 OPTION_EL,
77 OPTION_EMBEDDED_RELOCS,
78 OPTION_EXPORT_DYNAMIC,
79 OPTION_HELP,
80 OPTION_IGNORE,
81 OPTION_MAP,
82 OPTION_NO_DEMANGLE,
83 OPTION_NO_KEEP_MEMORY,
84 OPTION_NO_WARN_MISMATCH,
85 OPTION_NOINHIBIT_EXEC,
86 OPTION_NON_SHARED,
87 OPTION_NO_WHOLE_ARCHIVE,
88 OPTION_OFORMAT,
89 OPTION_RELAX,
90 OPTION_RETAIN_SYMBOLS_FILE,
91 OPTION_RPATH,
92 OPTION_RPATH_LINK,
93 OPTION_SHARED,
94 OPTION_SONAME,
95 OPTION_SORT_COMMON,
96 OPTION_SORT_SECTION,
97 OPTION_STATS,
98 OPTION_SYMBOLIC,
99 OPTION_TASK_LINK,
100 OPTION_TBSS,
101 OPTION_TDATA,
102 OPTION_TTEXT,
103 OPTION_TRADITIONAL_FORMAT,
104 OPTION_UR,
105 OPTION_VERBOSE,
106 OPTION_VERSION,
107 OPTION_VERSION_SCRIPT,
108 OPTION_VERSION_EXPORTS_SECTION,
109 OPTION_WARN_COMMON,
110 OPTION_WARN_CONSTRUCTORS,
111 OPTION_WARN_FATAL,
112 OPTION_WARN_MULTIPLE_GP,
113 OPTION_WARN_ONCE,
114 OPTION_WARN_SECTION_ALIGN,
115 OPTION_SPLIT_BY_RELOC,
116 OPTION_SPLIT_BY_FILE ,
117 OPTION_WHOLE_ARCHIVE,
118 OPTION_ADD_NEEDED,
119 OPTION_NO_ADD_NEEDED,
120 OPTION_AS_NEEDED,
121 OPTION_NO_AS_NEEDED,
122 OPTION_WRAP,
123 OPTION_FORCE_EXE_SUFFIX,
124 OPTION_GC_SECTIONS,
125 OPTION_NO_GC_SECTIONS,
126 OPTION_HASH_SIZE,
127 OPTION_CHECK_SECTIONS,
128 OPTION_NO_CHECK_SECTIONS,
129 OPTION_NO_UNDEFINED,
130 OPTION_INIT,
131 OPTION_FINI,
132 OPTION_SECTION_START,
133 OPTION_UNIQUE,
134 OPTION_TARGET_HELP,
135 OPTION_ALLOW_SHLIB_UNDEFINED,
136 OPTION_NO_ALLOW_SHLIB_UNDEFINED,
137 OPTION_ALLOW_MULTIPLE_DEFINITION,
138 OPTION_NO_UNDEFINED_VERSION,
139 OPTION_DEFAULT_SYMVER,
140 OPTION_DEFAULT_IMPORTED_SYMVER,
141 OPTION_DISCARD_NONE,
142 OPTION_SPARE_DYNAMIC_TAGS,
143 OPTION_NO_DEFINE_COMMON,
144 OPTION_NOSTDLIB,
145 OPTION_NO_OMAGIC,
146 OPTION_STRIP_DISCARDED,
147 OPTION_NO_STRIP_DISCARDED,
148 OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
149 OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
150 OPTION_PIE,
151 OPTION_UNRESOLVED_SYMBOLS,
152 OPTION_WARN_UNRESOLVED_SYMBOLS,
153 OPTION_ERROR_UNRESOLVED_SYMBOLS,
154 OPTION_WARN_SHARED_TEXTREL,
155 OPTION_REDUCE_MEMORY_OVERHEADS
156 };
157
158 /* The long options. This structure is used for both the option
159 parsing and the help text. */
160
161 struct ld_option
162 {
163 /* The long option information. */
164 struct option opt;
165 /* The short option with the same meaning ('\0' if none). */
166 char shortopt;
167 /* The name of the argument (NULL if none). */
168 const char *arg;
169 /* The documentation string. If this is NULL, this is a synonym for
170 the previous option. */
171 const char *doc;
172 enum {
173 /* Use one dash before long option name. */
174 ONE_DASH,
175 /* Use two dashes before long option name. */
176 TWO_DASHES,
177 /* Only accept two dashes before the long option name.
178 This is an overloading of the use of this enum, since originally it
179 was only intended to tell the --help display function how to display
180 the long option name. This feature was added in order to resolve
181 the confusion about the -omagic command line switch. Is it setting
182 the output file name to "magic" or is it setting the NMAGIC flag on
183 the output ? It has been decided that it is setting the output file
184 name, and that if you want to set the NMAGIC flag you should use -N
185 or --omagic. */
186 EXACTLY_TWO_DASHES,
187 /* Don't mention this option in --help output. */
188 NO_HELP
189 } control;
190 };
191
192 static const struct ld_option ld_options[] =
193 {
194 { {NULL, required_argument, NULL, '\0'},
195 'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
196 ONE_DASH },
197 { {"architecture", required_argument, NULL, 'A'},
198 'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
199 { {"format", required_argument, NULL, 'b'},
200 'b', N_("TARGET"), N_("Specify target for following input files"),
201 TWO_DASHES },
202 { {"mri-script", required_argument, NULL, 'c'},
203 'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
204 { {"dc", no_argument, NULL, 'd'},
205 'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
206 { {"dp", no_argument, NULL, 'd'},
207 '\0', NULL, NULL, ONE_DASH },
208 { {"entry", required_argument, NULL, 'e'},
209 'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
210 { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
211 'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
212 { {"EB", no_argument, NULL, OPTION_EB},
213 '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
214 { {"EL", no_argument, NULL, OPTION_EL},
215 '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
216 { {"auxiliary", required_argument, NULL, 'f'},
217 'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
218 TWO_DASHES },
219 { {"filter", required_argument, NULL, 'F'},
220 'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
221 TWO_DASHES },
222 { {NULL, no_argument, NULL, '\0'},
223 'g', NULL, N_("Ignored"), ONE_DASH },
224 { {"gpsize", required_argument, NULL, 'G'},
225 'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
226 TWO_DASHES },
227 { {"soname", required_argument, NULL, OPTION_SONAME},
228 'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
229 { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
230 'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
231 TWO_DASHES },
232 { {"library", required_argument, NULL, 'l'},
233 'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
234 { {"library-path", required_argument, NULL, 'L'},
235 'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
236 TWO_DASHES },
237 { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
238 '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
239 { {NULL, required_argument, NULL, '\0'},
240 'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
241 { {"print-map", no_argument, NULL, 'M'},
242 'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
243 { {"nmagic", no_argument, NULL, 'n'},
244 'n', NULL, N_("Do not page align data"), TWO_DASHES },
245 { {"omagic", no_argument, NULL, 'N'},
246 'N', NULL, N_("Do not page align data, do not make text readonly"),
247 EXACTLY_TWO_DASHES },
248 { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
249 '\0', NULL, N_("Page align data, make text readonly"),
250 EXACTLY_TWO_DASHES },
251 { {"output", required_argument, NULL, 'o'},
252 'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
253 { {NULL, required_argument, NULL, '\0'},
254 'O', NULL, N_("Optimize output file"), ONE_DASH },
255 { {"Qy", no_argument, NULL, OPTION_IGNORE},
256 '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
257 { {"emit-relocs", no_argument, NULL, 'q'},
258 'q', NULL, "Generate relocations in final output", TWO_DASHES },
259 { {"relocatable", no_argument, NULL, 'r'},
260 'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
261 { {NULL, no_argument, NULL, '\0'},
262 'i', NULL, NULL, ONE_DASH },
263 { {"just-symbols", required_argument, NULL, 'R'},
264 'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
265 TWO_DASHES },
266 { {"strip-all", no_argument, NULL, 's'},
267 's', NULL, N_("Strip all symbols"), TWO_DASHES },
268 { {"strip-debug", no_argument, NULL, 'S'},
269 'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
270 { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
271 '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
272 { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
273 '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
274 { {"trace", no_argument, NULL, 't'},
275 't', NULL, N_("Trace file opens"), TWO_DASHES },
276 { {"script", required_argument, NULL, 'T'},
277 'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
278 { {"undefined", required_argument, NULL, 'u'},
279 'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
280 TWO_DASHES },
281 { {"unique", optional_argument, NULL, OPTION_UNIQUE},
282 '\0', N_("[=SECTION]"),
283 N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
284 { {"Ur", no_argument, NULL, OPTION_UR},
285 '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
286 { {"version", no_argument, NULL, OPTION_VERSION},
287 'v', NULL, N_("Print version information"), TWO_DASHES },
288 { {NULL, no_argument, NULL, '\0'},
289 'V', NULL, N_("Print version and emulation information"), ONE_DASH },
290 { {"discard-all", no_argument, NULL, 'x'},
291 'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
292 { {"discard-locals", no_argument, NULL, 'X'},
293 'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
294 { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
295 '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
296 { {"trace-symbol", required_argument, NULL, 'y'},
297 'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
298 { {NULL, required_argument, NULL, '\0'},
299 'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
300 ONE_DASH },
301 { {"start-group", no_argument, NULL, '('},
302 '(', NULL, N_("Start a group"), TWO_DASHES },
303 { {"end-group", no_argument, NULL, ')'},
304 ')', NULL, N_("End a group"), TWO_DASHES },
305 { {"accept-unknown-input-arch", no_argument, NULL,
306 OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
307 '\0', NULL,
308 N_("Accept input files whose architecture cannot be determined"),
309 TWO_DASHES },
310 { {"no-accept-unknown-input-arch", no_argument, NULL,
311 OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
312 '\0', NULL, N_("Reject input files whose architecture is unknown"),
313 TWO_DASHES },
314 { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
315 '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
316 "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
317 { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
318 '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
319 "\t\t\t\tin following dynamic libs"), TWO_DASHES },
320 { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
321 '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
322 TWO_DASHES },
323 { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
324 '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
325 TWO_DASHES },
326 { {"assert", required_argument, NULL, OPTION_ASSERT},
327 '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
328 { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
329 '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
330 { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
331 '\0', NULL, NULL, ONE_DASH },
332 { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
333 '\0', NULL, NULL, ONE_DASH },
334 { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
335 '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
336 { {"dn", no_argument, NULL, OPTION_NON_SHARED},
337 '\0', NULL, NULL, ONE_DASH },
338 { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
339 '\0', NULL, NULL, ONE_DASH },
340 { {"static", no_argument, NULL, OPTION_NON_SHARED},
341 '\0', NULL, NULL, ONE_DASH },
342 { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
343 '\0', NULL, N_("Bind global references locally"), ONE_DASH },
344 { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
345 '\0', NULL, N_("Check section addresses for overlaps (default)"),
346 TWO_DASHES },
347 { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
348 '\0', NULL, N_("Do not check section addresses for overlaps"),
349 TWO_DASHES },
350 { {"cref", no_argument, NULL, OPTION_CREF},
351 '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
352 { {"defsym", required_argument, NULL, OPTION_DEFSYM},
353 '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
354 { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
355 '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
356 TWO_DASHES },
357 { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
358 '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
359 { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
360 '\0', NULL, N_("Treat warnings as errors"),
361 TWO_DASHES },
362 { {"fini", required_argument, NULL, OPTION_FINI},
363 '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
364 { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
365 '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
366 { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
367 '\0', NULL, N_("Remove unused sections (on some targets)"),
368 TWO_DASHES },
369 { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
370 '\0', NULL, N_("Don't remove unused sections (default)"),
371 TWO_DASHES },
372 { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
373 '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
374 TWO_DASHES },
375 { {"help", no_argument, NULL, OPTION_HELP},
376 '\0', NULL, N_("Print option help"), TWO_DASHES },
377 { {"init", required_argument, NULL, OPTION_INIT},
378 '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
379 { {"Map", required_argument, NULL, OPTION_MAP},
380 '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
381 { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
382 '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
383 { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
384 '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
385 { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
386 '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
387 { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
388 '\0', NULL, N_("Do not allow unresolved references in object files"),
389 TWO_DASHES },
390 { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
391 '\0', NULL, N_("Allow unresolved references in shared libaries"),
392 TWO_DASHES },
393 { {"no-allow-shlib-undefined", no_argument, NULL,
394 OPTION_NO_ALLOW_SHLIB_UNDEFINED},
395 '\0', NULL, N_("Do not allow unresolved references in shared libs"),
396 TWO_DASHES },
397 { {"allow-multiple-definition", no_argument, NULL,
398 OPTION_ALLOW_MULTIPLE_DEFINITION},
399 '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
400 { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
401 '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
402 { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
403 '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
404 { {"default-imported-symver", no_argument, NULL,
405 OPTION_DEFAULT_IMPORTED_SYMVER},
406 '\0', NULL, N_("Create default symbol version for imported symbols"),
407 TWO_DASHES },
408 { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
409 '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
410 { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
411 '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
412 { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
413 '\0', NULL, N_("Create an output file even if errors occur"),
414 TWO_DASHES },
415 { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
416 '\0', NULL, NULL, NO_HELP },
417 { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
418 '\0', NULL, N_("Only use library directories specified on\n"
419 "\t\t\t\tthe command line"), ONE_DASH },
420 { {"oformat", required_argument, NULL, OPTION_OFORMAT},
421 '\0', N_("TARGET"), N_("Specify target of output file"),
422 EXACTLY_TWO_DASHES },
423 { {"qmagic", no_argument, NULL, OPTION_IGNORE},
424 '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
425 { {"reduce-memory-overheads", no_argument, NULL,
426 OPTION_REDUCE_MEMORY_OVERHEADS},
427 '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
428 TWO_DASHES },
429 { {"relax", no_argument, NULL, OPTION_RELAX},
430 '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
431 { {"retain-symbols-file", required_argument, NULL,
432 OPTION_RETAIN_SYMBOLS_FILE},
433 '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
434 { {"rpath", required_argument, NULL, OPTION_RPATH},
435 '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
436 { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
437 '\0', N_("PATH"), N_("Set link time shared library search path"),
438 ONE_DASH },
439 { {"shared", no_argument, NULL, OPTION_SHARED},
440 '\0', NULL, N_("Create a shared library"), ONE_DASH },
441 { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD. */
442 '\0', NULL, NULL, ONE_DASH },
443 { {"pie", no_argument, NULL, OPTION_PIE},
444 '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
445 { {"pic-executable", no_argument, NULL, OPTION_PIE},
446 '\0', NULL, NULL, TWO_DASHES },
447 { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
448 '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
449 { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
450 '\0', NULL, NULL, NO_HELP },
451 { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
452 '\0', N_("name|alignment"),
453 N_("Sort sections by name or maximum alignment"), TWO_DASHES },
454 { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
455 '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
456 TWO_DASHES },
457 { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
458 '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
459 TWO_DASHES },
460 { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
461 '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
462 TWO_DASHES },
463 { {"stats", no_argument, NULL, OPTION_STATS},
464 '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
465 { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
466 '\0', NULL, N_("Display target specific options"), TWO_DASHES },
467 { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
468 '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
469 { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
470 '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
471 { {"section-start", required_argument, NULL, OPTION_SECTION_START},
472 '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
473 TWO_DASHES },
474 { {"Tbss", required_argument, NULL, OPTION_TBSS},
475 '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
476 { {"Tdata", required_argument, NULL, OPTION_TDATA},
477 '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
478 { {"Ttext", required_argument, NULL, OPTION_TTEXT},
479 '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
480 { {"unresolved-symbols=<method>", required_argument, NULL,
481 OPTION_UNRESOLVED_SYMBOLS},
482 '\0', NULL, N_("How to handle unresolved symbols. <method> is:\n"
483 "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
484 "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
485 { {"verbose", no_argument, NULL, OPTION_VERBOSE},
486 '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
487 { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux. */
488 '\0', NULL, NULL, NO_HELP },
489 { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
490 '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
491 { {"version-exports-section", required_argument, NULL,
492 OPTION_VERSION_EXPORTS_SECTION },
493 '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
494 "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
495 { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
496 '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
497 { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
498 '\0', NULL, N_("Warn if global constructors/destructors are seen"),
499 TWO_DASHES },
500 { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
501 '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
502 { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
503 '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
504 { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
505 '\0', NULL, N_("Warn if start of section changes due to alignment"),
506 TWO_DASHES },
507 { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
508 '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
509 TWO_DASHES },
510 { {"warn-unresolved-symbols", no_argument, NULL,
511 OPTION_WARN_UNRESOLVED_SYMBOLS},
512 '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
513 { {"error-unresolved-symbols", no_argument, NULL,
514 OPTION_ERROR_UNRESOLVED_SYMBOLS},
515 '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
516 { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
517 '\0', NULL, N_("Include all objects from following archives"),
518 TWO_DASHES },
519 { {"wrap", required_argument, NULL, OPTION_WRAP},
520 '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
521 };
522
523 #define OPTION_COUNT ARRAY_SIZE (ld_options)
524
525 void
parse_args(unsigned argc,char ** argv)526 parse_args (unsigned argc, char **argv)
527 {
528 unsigned i;
529 int is, il, irl;
530 int ingroup = 0;
531 char *default_dirlist = NULL;
532 char *shortopts;
533 struct option *longopts;
534 struct option *really_longopts;
535 int last_optind;
536 enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
537
538 shortopts = xmalloc (OPTION_COUNT * 3 + 2);
539 longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
540 really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
541
542 /* Starting the short option string with '-' is for programs that
543 expect options and other ARGV-elements in any order and that care about
544 the ordering of the two. We describe each non-option ARGV-element
545 as if it were the argument of an option with character code 1. */
546 shortopts[0] = '-';
547 is = 1;
548 il = 0;
549 irl = 0;
550 for (i = 0; i < OPTION_COUNT; i++)
551 {
552 if (ld_options[i].shortopt != '\0')
553 {
554 shortopts[is] = ld_options[i].shortopt;
555 ++is;
556 if (ld_options[i].opt.has_arg == required_argument
557 || ld_options[i].opt.has_arg == optional_argument)
558 {
559 shortopts[is] = ':';
560 ++is;
561 if (ld_options[i].opt.has_arg == optional_argument)
562 {
563 shortopts[is] = ':';
564 ++is;
565 }
566 }
567 }
568 if (ld_options[i].opt.name != NULL)
569 {
570 if (ld_options[i].control == EXACTLY_TWO_DASHES)
571 {
572 really_longopts[irl] = ld_options[i].opt;
573 ++irl;
574 }
575 else
576 {
577 longopts[il] = ld_options[i].opt;
578 ++il;
579 }
580 }
581 }
582 shortopts[is] = '\0';
583 longopts[il].name = NULL;
584 really_longopts[irl].name = NULL;
585
586 ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
587
588 /* The -G option is ambiguous on different platforms. Sometimes it
589 specifies the largest data size to put into the small data
590 section. Sometimes it is equivalent to --shared. Unfortunately,
591 the first form takes an argument, while the second does not.
592
593 We need to permit the --shared form because on some platforms,
594 such as Solaris, gcc -shared will pass -G to the linker.
595
596 To permit either usage, we look through the argument list. If we
597 find -G not followed by a number, we change it into --shared.
598 This will work for most normal cases. */
599 for (i = 1; i < argc; i++)
600 if (strcmp (argv[i], "-G") == 0
601 && (i + 1 >= argc
602 || ! ISDIGIT (argv[i + 1][0])))
603 argv[i] = (char *) "--shared";
604
605 /* Because we permit long options to start with a single dash, and
606 we have a --library option, and the -l option is conventionally
607 used with an immediately following argument, we can have bad
608 results if somebody tries to use -l with a library whose name
609 happens to start with "ibrary", as in -li. We avoid problems by
610 simply turning -l into --library. This means that users will
611 have to use two dashes in order to use --library, which is OK
612 since that's how it is documented.
613
614 FIXME: It's possible that this problem can arise for other short
615 options as well, although the user does always have the recourse
616 of adding a space between the option and the argument. */
617 for (i = 1; i < argc; i++)
618 {
619 if (argv[i][0] == '-'
620 && argv[i][1] == 'l'
621 && argv[i][2] != '\0')
622 {
623 char *n;
624
625 n = xmalloc (strlen (argv[i]) + 20);
626 sprintf (n, "--library=%s", argv[i] + 2);
627 argv[i] = n;
628 }
629 }
630
631 last_optind = -1;
632 while (1)
633 {
634 int longind;
635 int optc;
636
637 /* Using last_optind lets us avoid calling ldemul_parse_args
638 multiple times on a single option, which would lead to
639 confusion in the internal static variables maintained by
640 getopt. This could otherwise happen for an argument like
641 -nx, in which the -n is parsed as a single option, and we
642 loop around to pick up the -x. */
643 if (optind != last_optind)
644 if (ldemul_parse_args (argc, argv))
645 continue;
646
647 /* getopt_long_only is like getopt_long, but '-' as well as '--'
648 can indicate a long option. */
649 opterr = 0;
650 last_optind = optind;
651 optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
652 if (optc == '?')
653 {
654 optind = last_optind;
655 optc = getopt_long (argc, argv, "-", really_longopts, &longind);
656 }
657
658 if (ldemul_handle_option (optc))
659 continue;
660
661 if (optc == -1)
662 break;
663
664 switch (optc)
665 {
666 case '?':
667 einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
668 default:
669 einfo (_("%P%F: use the --help option for usage information\n"));
670
671 case 1: /* File name. */
672 lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
673 break;
674
675 case OPTION_IGNORE:
676 break;
677 case 'a':
678 /* For HP/UX compatibility. Actually -a shared should mean
679 ``use only shared libraries'' but, then, we don't
680 currently support shared libraries on HP/UX anyhow. */
681 if (strcmp (optarg, "archive") == 0)
682 config.dynamic_link = FALSE;
683 else if (strcmp (optarg, "shared") == 0
684 || strcmp (optarg, "default") == 0)
685 config.dynamic_link = TRUE;
686 else
687 einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
688 break;
689 case OPTION_ASSERT:
690 /* FIXME: We just ignore these, but we should handle them. */
691 if (strcmp (optarg, "definitions") == 0)
692 ;
693 else if (strcmp (optarg, "nodefinitions") == 0)
694 ;
695 else if (strcmp (optarg, "nosymbolic") == 0)
696 ;
697 else if (strcmp (optarg, "pure-text") == 0)
698 ;
699 else
700 einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
701 break;
702 case 'A':
703 ldfile_add_arch (optarg);
704 break;
705 case 'b':
706 lang_add_target (optarg);
707 break;
708 case 'c':
709 ldfile_open_command_file (optarg);
710 parser_input = input_mri_script;
711 yyparse ();
712 break;
713 case OPTION_CALL_SHARED:
714 config.dynamic_link = TRUE;
715 break;
716 case OPTION_NON_SHARED:
717 config.dynamic_link = FALSE;
718 break;
719 case OPTION_CREF:
720 command_line.cref = TRUE;
721 link_info.notice_all = TRUE;
722 break;
723 case 'd':
724 command_line.force_common_definition = TRUE;
725 break;
726 case OPTION_DEFSYM:
727 lex_string = optarg;
728 lex_redirect (optarg);
729 parser_input = input_defsym;
730 parsing_defsym = 1;
731 yyparse ();
732 parsing_defsym = 0;
733 lex_string = NULL;
734 break;
735 case OPTION_DEMANGLE:
736 demangling = TRUE;
737 if (optarg != NULL)
738 {
739 enum demangling_styles style;
740
741 style = cplus_demangle_name_to_style (optarg);
742 if (style == unknown_demangling)
743 einfo (_("%F%P: unknown demangling style `%s'"),
744 optarg);
745
746 cplus_demangle_set_style (style);
747 }
748 break;
749 case 'I': /* Used on Solaris. */
750 case OPTION_DYNAMIC_LINKER:
751 command_line.interpreter = optarg;
752 break;
753 case OPTION_SYSROOT:
754 /* Already handled in ldmain.c. */
755 break;
756 case OPTION_EB:
757 command_line.endian = ENDIAN_BIG;
758 break;
759 case OPTION_EL:
760 command_line.endian = ENDIAN_LITTLE;
761 break;
762 case OPTION_EMBEDDED_RELOCS:
763 command_line.embedded_relocs = TRUE;
764 break;
765 case OPTION_EXPORT_DYNAMIC:
766 case 'E': /* HP/UX compatibility. */
767 link_info.export_dynamic = TRUE;
768 break;
769 case 'e':
770 lang_add_entry (optarg, TRUE);
771 break;
772 case 'f':
773 if (command_line.auxiliary_filters == NULL)
774 {
775 command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
776 command_line.auxiliary_filters[0] = optarg;
777 command_line.auxiliary_filters[1] = NULL;
778 }
779 else
780 {
781 int c;
782 char **p;
783
784 c = 0;
785 for (p = command_line.auxiliary_filters; *p != NULL; p++)
786 ++c;
787 command_line.auxiliary_filters
788 = xrealloc (command_line.auxiliary_filters,
789 (c + 2) * sizeof (char *));
790 command_line.auxiliary_filters[c] = optarg;
791 command_line.auxiliary_filters[c + 1] = NULL;
792 }
793 break;
794 case 'F':
795 command_line.filter_shlib = optarg;
796 break;
797 case OPTION_FORCE_EXE_SUFFIX:
798 command_line.force_exe_suffix = TRUE;
799 break;
800 case 'G':
801 {
802 char *end;
803 g_switch_value = strtoul (optarg, &end, 0);
804 if (*end)
805 einfo (_("%P%F: invalid number `%s'\n"), optarg);
806 }
807 break;
808 case 'g':
809 /* Ignore. */
810 break;
811 case OPTION_GC_SECTIONS:
812 command_line.gc_sections = TRUE;
813 break;
814 case OPTION_HELP:
815 help ();
816 xexit (0);
817 break;
818 case 'L':
819 ldfile_add_library_path (optarg, TRUE);
820 break;
821 case 'l':
822 lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
823 break;
824 case 'M':
825 config.map_filename = "-";
826 break;
827 case 'm':
828 /* Ignore. Was handled in a pre-parse. */
829 break;
830 case OPTION_MAP:
831 config.map_filename = optarg;
832 break;
833 case 'N':
834 config.text_read_only = FALSE;
835 config.magic_demand_paged = FALSE;
836 config.dynamic_link = FALSE;
837 break;
838 case OPTION_NO_OMAGIC:
839 config.text_read_only = TRUE;
840 config.magic_demand_paged = TRUE;
841 /* NB/ Does not set dynamic_link to TRUE.
842 Use --call-shared or -Bdynamic for this. */
843 break;
844 case 'n':
845 config.magic_demand_paged = FALSE;
846 config.dynamic_link = FALSE;
847 break;
848 case OPTION_NO_DEFINE_COMMON:
849 command_line.inhibit_common_definition = TRUE;
850 break;
851 case OPTION_NO_DEMANGLE:
852 demangling = FALSE;
853 break;
854 case OPTION_NO_GC_SECTIONS:
855 command_line.gc_sections = FALSE;
856 break;
857 case OPTION_NO_KEEP_MEMORY:
858 link_info.keep_memory = FALSE;
859 break;
860 case OPTION_NO_UNDEFINED:
861 link_info.unresolved_syms_in_objects
862 = how_to_report_unresolved_symbols;
863 break;
864 case OPTION_ALLOW_SHLIB_UNDEFINED:
865 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
866 break;
867 case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
868 link_info.unresolved_syms_in_shared_libs
869 = how_to_report_unresolved_symbols;
870 break;
871 case OPTION_UNRESOLVED_SYMBOLS:
872 if (strcmp (optarg, "ignore-all") == 0)
873 {
874 link_info.unresolved_syms_in_objects = RM_IGNORE;
875 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
876 }
877 else if (strcmp (optarg, "report-all") == 0)
878 {
879 link_info.unresolved_syms_in_objects
880 = how_to_report_unresolved_symbols;
881 link_info.unresolved_syms_in_shared_libs
882 = how_to_report_unresolved_symbols;
883 }
884 else if (strcmp (optarg, "ignore-in-object-files") == 0)
885 {
886 link_info.unresolved_syms_in_objects = RM_IGNORE;
887 link_info.unresolved_syms_in_shared_libs
888 = how_to_report_unresolved_symbols;
889 }
890 else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
891 {
892 link_info.unresolved_syms_in_objects
893 = how_to_report_unresolved_symbols;
894 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
895 }
896 else
897 einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
898 break;
899 case OPTION_WARN_UNRESOLVED_SYMBOLS:
900 how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
901 if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
902 link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
903 if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
904 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
905 break;
906
907 case OPTION_ERROR_UNRESOLVED_SYMBOLS:
908 how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
909 if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
910 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
911 if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
912 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
913 break;
914 case OPTION_ALLOW_MULTIPLE_DEFINITION:
915 link_info.allow_multiple_definition = TRUE;
916 break;
917 case OPTION_NO_UNDEFINED_VERSION:
918 link_info.allow_undefined_version = FALSE;
919 break;
920 case OPTION_DEFAULT_SYMVER:
921 link_info.create_default_symver = TRUE;
922 break;
923 case OPTION_DEFAULT_IMPORTED_SYMVER:
924 link_info.default_imported_symver = TRUE;
925 break;
926 case OPTION_NO_WARN_MISMATCH:
927 command_line.warn_mismatch = FALSE;
928 break;
929 case OPTION_NOINHIBIT_EXEC:
930 force_make_executable = TRUE;
931 break;
932 case OPTION_NOSTDLIB:
933 config.only_cmd_line_lib_dirs = TRUE;
934 break;
935 case OPTION_NO_WHOLE_ARCHIVE:
936 whole_archive = FALSE;
937 break;
938 case 'O':
939 /* FIXME "-O<non-digits> <value>" used to set the address of
940 section <non-digits>. Was this for compatibility with
941 something, or can we create a new option to do that
942 (with a syntax similar to -defsym)?
943 getopt can't handle two args to an option without kludges. */
944
945 /* Enable optimizations of output files. */
946 link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
947 break;
948 case 'o':
949 lang_add_output (optarg, 0);
950 break;
951 case OPTION_OFORMAT:
952 lang_add_output_format (optarg, NULL, NULL, 0);
953 break;
954 case 'q':
955 link_info.emitrelocations = TRUE;
956 break;
957 case 'i':
958 case 'r':
959 if (optind == last_optind)
960 /* This can happen if the user put "-rpath,a" on the command
961 line. (Or something similar. The comma is important).
962 Getopt becomes confused and thinks that this is a -r option
963 but it cannot parse the text after the -r so it refuses to
964 increment the optind counter. Detect this case and issue
965 an error message here. We cannot just make this a warning,
966 increment optind, and continue because getopt is too confused
967 and will seg-fault the next time around. */
968 einfo(_("%P%F: bad -rpath option\n"));
969
970 link_info.relocatable = TRUE;
971 config.build_constructors = FALSE;
972 config.magic_demand_paged = FALSE;
973 config.text_read_only = FALSE;
974 config.dynamic_link = FALSE;
975 break;
976 case 'R':
977 /* The GNU linker traditionally uses -R to mean to include
978 only the symbols from a file. The Solaris linker uses -R
979 to set the path used by the runtime linker to find
980 libraries. This is the GNU linker -rpath argument. We
981 try to support both simultaneously by checking the file
982 named. If it is a directory, rather than a regular file,
983 we assume -rpath was meant. */
984 {
985 struct stat s;
986
987 if (stat (optarg, &s) >= 0
988 && ! S_ISDIR (s.st_mode))
989 {
990 lang_add_input_file (optarg,
991 lang_input_file_is_symbols_only_enum,
992 NULL);
993 break;
994 }
995 }
996 /* Fall through. */
997 case OPTION_RPATH:
998 if (command_line.rpath == NULL)
999 command_line.rpath = xstrdup (optarg);
1000 else
1001 {
1002 size_t rpath_len = strlen (command_line.rpath);
1003 size_t optarg_len = strlen (optarg);
1004 char *buf;
1005 char *cp = command_line.rpath;
1006
1007 /* First see whether OPTARG is already in the path. */
1008 do
1009 {
1010 size_t idx = 0;
1011
1012 while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
1013 ++idx;
1014 if (optarg[idx] == '\0'
1015 && (cp[idx] == '\0' || cp[idx] == ':'))
1016 /* We found it. */
1017 break;
1018
1019 /* Not yet found. */
1020 cp = strchr (cp, ':');
1021 if (cp != NULL)
1022 ++cp;
1023 }
1024 while (cp != NULL);
1025
1026 if (cp == NULL)
1027 {
1028 buf = xmalloc (rpath_len + optarg_len + 2);
1029 sprintf (buf, "%s:%s", command_line.rpath, optarg);
1030 free (command_line.rpath);
1031 command_line.rpath = buf;
1032 }
1033 }
1034 break;
1035 case OPTION_RPATH_LINK:
1036 if (command_line.rpath_link == NULL)
1037 command_line.rpath_link = xstrdup (optarg);
1038 else
1039 {
1040 char *buf;
1041
1042 buf = xmalloc (strlen (command_line.rpath_link)
1043 + strlen (optarg)
1044 + 2);
1045 sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1046 free (command_line.rpath_link);
1047 command_line.rpath_link = buf;
1048 }
1049 break;
1050 case OPTION_RELAX:
1051 command_line.relax = TRUE;
1052 break;
1053 case OPTION_RETAIN_SYMBOLS_FILE:
1054 add_keepsyms_file (optarg);
1055 break;
1056 case 'S':
1057 link_info.strip = strip_debugger;
1058 break;
1059 case 's':
1060 link_info.strip = strip_all;
1061 break;
1062 case OPTION_STRIP_DISCARDED:
1063 link_info.strip_discarded = TRUE;
1064 break;
1065 case OPTION_NO_STRIP_DISCARDED:
1066 link_info.strip_discarded = FALSE;
1067 break;
1068 case OPTION_SHARED:
1069 if (config.has_shared)
1070 {
1071 link_info.shared = TRUE;
1072 /* When creating a shared library, the default
1073 behaviour is to ignore any unresolved references. */
1074 if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1075 link_info.unresolved_syms_in_objects = RM_IGNORE;
1076 if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1077 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1078 }
1079 else
1080 einfo (_("%P%F: -shared not supported\n"));
1081 break;
1082 case OPTION_PIE:
1083 if (config.has_shared)
1084 {
1085 link_info.shared = TRUE;
1086 link_info.pie = TRUE;
1087 }
1088 else
1089 einfo (_("%P%F: -pie not supported\n"));
1090 break;
1091 case 'h': /* Used on Solaris. */
1092 case OPTION_SONAME:
1093 command_line.soname = optarg;
1094 break;
1095 case OPTION_SORT_COMMON:
1096 config.sort_common = TRUE;
1097 break;
1098 case OPTION_SORT_SECTION:
1099 if (strcmp (optarg, N_("name")) == 0)
1100 sort_section = by_name;
1101 else if (strcmp (optarg, N_("alignment")) == 0)
1102 sort_section = by_alignment;
1103 else
1104 einfo (_("%P%F: invalid section sorting option: %s\n"),
1105 optarg);
1106 break;
1107 case OPTION_STATS:
1108 config.stats = TRUE;
1109 break;
1110 case OPTION_SYMBOLIC:
1111 link_info.symbolic = TRUE;
1112 break;
1113 case 't':
1114 trace_files = TRUE;
1115 break;
1116 case 'T':
1117 ldfile_open_command_file (optarg);
1118 parser_input = input_script;
1119 yyparse ();
1120 break;
1121 case OPTION_SECTION_START:
1122 {
1123 char *optarg2;
1124 char *sec_name;
1125 int len;
1126
1127 /* Check for <something>=<somthing>... */
1128 optarg2 = strchr (optarg, '=');
1129 if (optarg2 == NULL)
1130 einfo (_("%P%F: invalid argument to option"
1131 " \"--section-start\"\n"));
1132
1133 optarg2++;
1134
1135 /* So far so good. Are all the args present? */
1136 if ((*optarg == '\0') || (*optarg2 == '\0'))
1137 einfo (_("%P%F: missing argument(s) to option"
1138 " \"--section-start\"\n"));
1139
1140 /* We must copy the section name as set_section_start
1141 doesn't do it for us. */
1142 len = optarg2 - optarg;
1143 sec_name = xmalloc (len);
1144 memcpy (sec_name, optarg, len - 1);
1145 sec_name[len - 1] = 0;
1146
1147 /* Then set it... */
1148 set_section_start (sec_name, optarg2);
1149 }
1150 break;
1151 case OPTION_TARGET_HELP:
1152 /* Mention any target specific options. */
1153 ldemul_list_emulation_options (stdout);
1154 exit (0);
1155 case OPTION_TBSS:
1156 set_segment_start (".bss", optarg);
1157 break;
1158 case OPTION_TDATA:
1159 set_segment_start (".data", optarg);
1160 break;
1161 case OPTION_TTEXT:
1162 set_segment_start (".text", optarg);
1163 break;
1164 case OPTION_TRADITIONAL_FORMAT:
1165 link_info.traditional_format = TRUE;
1166 break;
1167 case OPTION_TASK_LINK:
1168 link_info.task_link = TRUE;
1169 /* Fall through - do an implied -r option. */
1170 case OPTION_UR:
1171 link_info.relocatable = TRUE;
1172 config.build_constructors = TRUE;
1173 config.magic_demand_paged = FALSE;
1174 config.text_read_only = FALSE;
1175 config.dynamic_link = FALSE;
1176 break;
1177 case 'u':
1178 ldlang_add_undef (optarg);
1179 break;
1180 case OPTION_UNIQUE:
1181 if (optarg != NULL)
1182 lang_add_unique (optarg);
1183 else
1184 config.unique_orphan_sections = TRUE;
1185 break;
1186 case OPTION_VERBOSE:
1187 ldversion (1);
1188 version_printed = TRUE;
1189 trace_file_tries = TRUE;
1190 overflow_cutoff_limit = -2;
1191 break;
1192 case 'v':
1193 ldversion (0);
1194 version_printed = TRUE;
1195 break;
1196 case 'V':
1197 ldversion (1);
1198 version_printed = TRUE;
1199 break;
1200 case OPTION_VERSION:
1201 ldversion (2);
1202 xexit (0);
1203 break;
1204 case OPTION_VERSION_SCRIPT:
1205 /* This option indicates a small script that only specifies
1206 version information. Read it, but don't assume that
1207 we've seen a linker script. */
1208 {
1209 FILE *hold_script_handle;
1210
1211 hold_script_handle = saved_script_handle;
1212 ldfile_open_command_file (optarg);
1213 saved_script_handle = hold_script_handle;
1214 parser_input = input_version_script;
1215 yyparse ();
1216 }
1217 break;
1218 case OPTION_VERSION_EXPORTS_SECTION:
1219 /* This option records a version symbol to be applied to the
1220 symbols listed for export to be found in the object files
1221 .exports sections. */
1222 command_line.version_exports_section = optarg;
1223 break;
1224 case OPTION_WARN_COMMON:
1225 config.warn_common = TRUE;
1226 break;
1227 case OPTION_WARN_CONSTRUCTORS:
1228 config.warn_constructors = TRUE;
1229 break;
1230 case OPTION_WARN_FATAL:
1231 config.fatal_warnings = TRUE;
1232 break;
1233 case OPTION_WARN_MULTIPLE_GP:
1234 config.warn_multiple_gp = TRUE;
1235 break;
1236 case OPTION_WARN_ONCE:
1237 config.warn_once = TRUE;
1238 break;
1239 case OPTION_WARN_SECTION_ALIGN:
1240 config.warn_section_align = TRUE;
1241 break;
1242 case OPTION_WARN_SHARED_TEXTREL:
1243 link_info.warn_shared_textrel = TRUE;
1244 break;
1245 case OPTION_WHOLE_ARCHIVE:
1246 whole_archive = TRUE;
1247 break;
1248 case OPTION_ADD_NEEDED:
1249 add_needed = TRUE;
1250 break;
1251 case OPTION_NO_ADD_NEEDED:
1252 add_needed = FALSE;
1253 break;
1254 case OPTION_AS_NEEDED:
1255 as_needed = TRUE;
1256 break;
1257 case OPTION_NO_AS_NEEDED:
1258 as_needed = FALSE;
1259 break;
1260 case OPTION_WRAP:
1261 add_wrap (optarg);
1262 break;
1263 case OPTION_DISCARD_NONE:
1264 link_info.discard = discard_none;
1265 break;
1266 case 'X':
1267 link_info.discard = discard_l;
1268 break;
1269 case 'x':
1270 link_info.discard = discard_all;
1271 break;
1272 case 'Y':
1273 if (strncmp (optarg, "P,", 2) == 0)
1274 optarg += 2;
1275 if (default_dirlist != NULL)
1276 free (default_dirlist);
1277 default_dirlist = xstrdup (optarg);
1278 break;
1279 case 'y':
1280 add_ysym (optarg);
1281 break;
1282 case OPTION_SPARE_DYNAMIC_TAGS:
1283 link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1284 break;
1285 case OPTION_SPLIT_BY_RELOC:
1286 if (optarg != NULL)
1287 config.split_by_reloc = strtoul (optarg, NULL, 0);
1288 else
1289 config.split_by_reloc = 32768;
1290 break;
1291 case OPTION_SPLIT_BY_FILE:
1292 if (optarg != NULL)
1293 config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1294 else
1295 config.split_by_file = 1;
1296 break;
1297 case OPTION_CHECK_SECTIONS:
1298 command_line.check_section_addresses = TRUE;
1299 break;
1300 case OPTION_NO_CHECK_SECTIONS:
1301 command_line.check_section_addresses = FALSE;
1302 break;
1303 case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1304 command_line.accept_unknown_input_arch = TRUE;
1305 break;
1306 case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1307 command_line.accept_unknown_input_arch = FALSE;
1308 break;
1309 case '(':
1310 if (ingroup)
1311 einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1312
1313 lang_enter_group ();
1314 ingroup = 1;
1315 break;
1316 case ')':
1317 if (! ingroup)
1318 einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1319
1320 lang_leave_group ();
1321 ingroup = 0;
1322 break;
1323
1324 case OPTION_INIT:
1325 link_info.init_function = optarg;
1326 break;
1327
1328 case OPTION_FINI:
1329 link_info.fini_function = optarg;
1330 break;
1331
1332 case OPTION_REDUCE_MEMORY_OVERHEADS:
1333 command_line.reduce_memory_overheads = TRUE;
1334 if (config.hash_table_size == 0)
1335 config.hash_table_size = 1021;
1336 break;
1337
1338 case OPTION_HASH_SIZE:
1339 {
1340 bfd_size_type new_size;
1341
1342 new_size = strtoul (optarg, NULL, 0);
1343 if (new_size)
1344 config.hash_table_size = new_size;
1345 else
1346 einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1347 }
1348 break;
1349 }
1350 }
1351
1352 if (ingroup)
1353 lang_leave_group ();
1354
1355 if (default_dirlist != NULL)
1356 {
1357 set_default_dirlist (default_dirlist);
1358 free (default_dirlist);
1359 }
1360
1361 if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1362 /* FIXME: Should we allow emulations a chance to set this ? */
1363 link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1364
1365 if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1366 /* FIXME: Should we allow emulations a chance to set this ? */
1367 link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1368 }
1369
1370 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1371 library search path. */
1372
1373 static void
set_default_dirlist(char * dirlist_ptr)1374 set_default_dirlist (char *dirlist_ptr)
1375 {
1376 char *p;
1377
1378 while (1)
1379 {
1380 p = strchr (dirlist_ptr, PATH_SEPARATOR);
1381 if (p != NULL)
1382 *p = '\0';
1383 if (*dirlist_ptr != '\0')
1384 ldfile_add_library_path (dirlist_ptr, TRUE);
1385 if (p == NULL)
1386 break;
1387 dirlist_ptr = p + 1;
1388 }
1389 }
1390
1391 static void
set_section_start(char * sect,char * valstr)1392 set_section_start (char *sect, char *valstr)
1393 {
1394 const char *end;
1395 bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1396 if (*end)
1397 einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1398 lang_section_start (sect, exp_intop (val), NULL);
1399 }
1400
1401 static void
set_segment_start(const char * section,char * valstr)1402 set_segment_start (const char *section, char *valstr)
1403 {
1404 const char *name;
1405 const char *end;
1406 segment_type *seg;
1407
1408 bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1409 if (*end)
1410 einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1411 /* If we already have an entry for this segment, update the existing
1412 value. */
1413 name = section + 1;
1414 for (seg = segments; seg; seg = seg->next)
1415 if (strcmp (seg->name, name) == 0)
1416 {
1417 seg->value = val;
1418 return;
1419 }
1420 /* There was no existing value so we must create a new segment
1421 entry. */
1422 seg = stat_alloc (sizeof (*seg));
1423 seg->name = name;
1424 seg->value = val;
1425 seg->used = FALSE;
1426 /* Add it to the linked list of segments. */
1427 seg->next = segments;
1428 segments = seg;
1429 /* Historically, -Ttext and friends set the base address of a
1430 particular section. For backwards compatibility, we still do
1431 that. If a SEGMENT_START directive is seen, the section address
1432 assignment will be disabled. */
1433 lang_section_start (section, exp_intop (val), seg);
1434 }
1435
1436
1437 /* Print help messages for the options. */
1438
1439 static void
help(void)1440 help (void)
1441 {
1442 unsigned i;
1443 const char **targets, **pp;
1444
1445 printf (_("Usage: %s [options] file...\n"), program_name);
1446
1447 printf (_("Options:\n"));
1448 for (i = 0; i < OPTION_COUNT; i++)
1449 {
1450 if (ld_options[i].doc != NULL)
1451 {
1452 bfd_boolean comma;
1453 int len;
1454 unsigned j;
1455
1456 printf (" ");
1457
1458 comma = FALSE;
1459 len = 2;
1460
1461 j = i;
1462 do
1463 {
1464 if (ld_options[j].shortopt != '\0'
1465 && ld_options[j].control != NO_HELP)
1466 {
1467 printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1468 len += (comma ? 2 : 0) + 2;
1469 if (ld_options[j].arg != NULL)
1470 {
1471 if (ld_options[j].opt.has_arg != optional_argument)
1472 {
1473 printf (" ");
1474 ++len;
1475 }
1476 printf ("%s", _(ld_options[j].arg));
1477 len += strlen (_(ld_options[j].arg));
1478 }
1479 comma = TRUE;
1480 }
1481 ++j;
1482 }
1483 while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1484
1485 j = i;
1486 do
1487 {
1488 if (ld_options[j].opt.name != NULL
1489 && ld_options[j].control != NO_HELP)
1490 {
1491 int two_dashes =
1492 (ld_options[j].control == TWO_DASHES
1493 || ld_options[j].control == EXACTLY_TWO_DASHES);
1494
1495 printf ("%s-%s%s",
1496 comma ? ", " : "",
1497 two_dashes ? "-" : "",
1498 ld_options[j].opt.name);
1499 len += ((comma ? 2 : 0)
1500 + 1
1501 + (two_dashes ? 1 : 0)
1502 + strlen (ld_options[j].opt.name));
1503 if (ld_options[j].arg != NULL)
1504 {
1505 printf (" %s", _(ld_options[j].arg));
1506 len += 1 + strlen (_(ld_options[j].arg));
1507 }
1508 comma = TRUE;
1509 }
1510 ++j;
1511 }
1512 while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1513
1514 if (len >= 30)
1515 {
1516 printf ("\n");
1517 len = 0;
1518 }
1519
1520 for (; len < 30; len++)
1521 putchar (' ');
1522
1523 printf ("%s\n", _(ld_options[i].doc));
1524 }
1525 }
1526
1527 /* Note: Various tools (such as libtool) depend upon the
1528 format of the listings below - do not change them. */
1529 /* xgettext:c-format */
1530 printf (_("%s: supported targets:"), program_name);
1531 targets = bfd_target_list ();
1532 for (pp = targets; *pp != NULL; pp++)
1533 printf (" %s", *pp);
1534 free (targets);
1535 printf ("\n");
1536
1537 /* xgettext:c-format */
1538 printf (_("%s: supported emulations: "), program_name);
1539 ldemul_list_emulations (stdout);
1540 printf ("\n");
1541
1542 /* xgettext:c-format */
1543 printf (_("%s: emulation specific options:\n"), program_name);
1544 ldemul_list_emulation_options (stdout);
1545 printf ("\n");
1546
1547 printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1548 }
1549