ld/lexsup.c

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