ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 1998
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GLD, the Gnu Linker.
   6
   7 GLD is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GLD is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GLD; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libiberty.h"
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <ctype.h>
  28 #include "getopt.h"
  29 #include "bfdlink.h"
  30 #include "ld.h"
  31 #include "ldmain.h"
  32 #include "ldmisc.h"
  33 #include "ldexp.h"
  34 #include "ldlang.h"
  35 #include "ldgram.h"
  36 #include "ldlex.h"
  37 #include "ldfile.h"
  38 #include "ldver.h"
  39 #include "ldemul.h"
  40
  41 #ifndef PATH_SEPARATOR
  42 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  43 #define PATH_SEPARATOR ';'
  44 #else
  45 #define PATH_SEPARATOR ':'
  46 #endif
  47 #endif
  48
  49 /* Somewhere above, sys/stat.h got included . . . . */
  50 #if !defined(S_ISDIR) && defined(S_IFDIR)
  51 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  52 #endif
  53
  54 /* Omit args to avoid the possibility of clashing with a system header
  55    that might disagree about consts.  */
  56 unsigned long strtoul ();
  57
  58 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  59 static void set_section_start PARAMS ((char *sect, char *valstr));
  60 static void help PARAMS ((void));
  61
  62 /* Non-zero if we are processing a --defsym from the command line.  */
  63 int parsing_defsym = 0;
  64
  65 /* Codes used for the long options with no short synonyms.  150 isn't
  66    special; it's just an arbitrary non-ASCII char value.  */
  67
  68 #define OPTION_ASSERT                   150
  69 #define OPTION_CALL_SHARED              (OPTION_ASSERT + 1)
  70 #define OPTION_CREF                     (OPTION_CALL_SHARED + 1)
  71 #define OPTION_DEFSYM                   (OPTION_CREF + 1)
  72 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  73 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  74 #define OPTION_EL                       (OPTION_EB + 1)
  75 #define OPTION_EMBEDDED_RELOCS          (OPTION_EL + 1)
  76 #define OPTION_EXPORT_DYNAMIC           (OPTION_EMBEDDED_RELOCS + 1)
  77 #define OPTION_HELP                     (OPTION_EXPORT_DYNAMIC + 1)
  78 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  79 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  80 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  81 #define OPTION_NO_WARN_MISMATCH         (OPTION_NO_KEEP_MEMORY + 1)
  82 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_WARN_MISMATCH + 1)
  83 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  84 #define OPTION_NO_WHOLE_ARCHIVE         (OPTION_NON_SHARED + 1)
  85 #define OPTION_OFORMAT                  (OPTION_NO_WHOLE_ARCHIVE + 1)
  86 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  87 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  88 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  89 #define OPTION_RPATH_LINK               (OPTION_RPATH + 1)
  90 #define OPTION_SHARED                   (OPTION_RPATH_LINK + 1)
  91 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  92 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  93 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  94 #define OPTION_SYMBOLIC                 (OPTION_STATS + 1)
  95 #define OPTION_TASK_LINK                (OPTION_SYMBOLIC + 1)
  96 #define OPTION_TBSS                     (OPTION_TASK_LINK + 1)
  97 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  98 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  99 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
 100 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
 101 #define OPTION_VERBOSE                  (OPTION_UR + 1)
 102 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
 103 #define OPTION_VERSION_SCRIPT           (OPTION_VERSION + 1)
 104 #define OPTION_WARN_COMMON              (OPTION_VERSION_SCRIPT + 1)
 105 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
 106 #define OPTION_WARN_MULTIPLE_GP         (OPTION_WARN_CONSTRUCTORS + 1)
 107 #define OPTION_WARN_ONCE                (OPTION_WARN_MULTIPLE_GP + 1)
 108 #define OPTION_WARN_SECTION_ALIGN       (OPTION_WARN_ONCE + 1)
 109 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_SECTION_ALIGN + 1)
 110 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 111 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 112 #define OPTION_WRAP                     (OPTION_WHOLE_ARCHIVE + 1)
 113 #define OPTION_FORCE_EXE_SUFFIX         (OPTION_WRAP + 1)
 114 #define OPTION_GC_SECTIONS              (OPTION_FORCE_EXE_SUFFIX + 1)
 115 #define OPTION_NO_GC_SECTIONS           (OPTION_GC_SECTIONS + 1)
 116
 117 /* The long options.  This structure is used for both the option
 118    parsing and the help text.  */
 119
 120 struct ld_option
 121 {
 122   /* The long option information.  */
 123   struct option opt;
 124   /* The short option with the same meaning ('\0' if none).  */
 125   char shortopt;
 126   /* The name of the argument (NULL if none).  */
 127   const char *arg;
 128   /* The documentation string.  If this is NULL, this is a synonym for
 129      the previous option.  */
 130   const char *doc;
 131   enum
 132     {
 133       /* Use one dash before long option name.  */
 134       ONE_DASH,
 135       /* Use two dashes before long option name.  */
 136       TWO_DASHES,
 137       /* Don't mention this option in --help output.  */
 138       NO_HELP
 139     } control;
 140 };
 141
 142 static const struct ld_option ld_options[] =
 143 {
 144   { {NULL, required_argument, NULL, '\0'},
 145       'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 146       ONE_DASH },
 147   { {"architecture", required_argument, NULL, 'A'},
 148       'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 149   { {"format", required_argument, NULL, 'b'},
 150       'b', N_("TARGET"), N_("Specify target for following input files"), TWO_DASHES },
 151   { {"mri-script", required_argument, NULL, 'c'},
 152       'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 153   { {"dc", no_argument, NULL, 'd'},
 154       'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 155   { {"dp", no_argument, NULL, 'd'},
 156       '\0', NULL, NULL, ONE_DASH },
 157   { {"entry", required_argument, NULL, 'e'},
 158       'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 159   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 160       'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 161   { {"auxiliary", required_argument, NULL, 'f'},
 162       'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 163       TWO_DASHES },
 164   { {"filter", required_argument, NULL, 'F'},
 165       'F', N_("SHLIB"), N_("Filter for shared object symbol table"), TWO_DASHES },
 166   { {NULL, no_argument, NULL, '\0'},
 167       'g', NULL, N_("Ignored"), ONE_DASH },
 168   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 169       '\0', NULL, N_("Remove unused sections on certain targets"),
 170       TWO_DASHES },
 171   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 172       '\0', NULL, N_("(Don't) Remove unused sections on certain targets"),
 173       TWO_DASHES },
 174   { {"gpsize", required_argument, NULL, 'G'},
 175       'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 176       TWO_DASHES },
 177   { {"soname", required_argument, NULL, OPTION_SONAME},
 178       'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 179   { {"library", required_argument, NULL, 'l'},
 180       'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 181   { {"library-path", required_argument, NULL, 'L'},
 182       'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"), TWO_DASHES },
 183   { {NULL, required_argument, NULL, '\0'},
 184       'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 185   { {"print-map", no_argument, NULL, 'M'},
 186       'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 187   { {"nmagic", no_argument, NULL, 'n'},
 188       'n', NULL, N_("Do not page align data"), TWO_DASHES },
 189   { {"omagic", no_argument, NULL, 'N'},
 190       'N', NULL, N_("Do not page align data, do not make text readonly"),
 191       TWO_DASHES },
 192   { {"output", required_argument, NULL, 'o'},
 193       'o', N_("FILE"), N_("Set output file name"), TWO_DASHES },
 194   { {NULL, required_argument, NULL, '\0'},
 195       'O', NULL, N_("Ignored"), ONE_DASH },
 196   { {"relocateable", no_argument, NULL, 'r'},
 197       'r', NULL, N_("Generate relocateable output"), TWO_DASHES },
 198   { {NULL, no_argument, NULL, '\0'},
 199       'i', NULL, NULL, ONE_DASH },
 200   { {"just-symbols", required_argument, NULL, 'R'},
 201       'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 202       TWO_DASHES },
 203   { {"strip-all", no_argument, NULL, 's'},
 204       's', NULL, N_("Strip all symbols"), TWO_DASHES },
 205   { {"strip-debug", no_argument, NULL, 'S'},
 206       'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 207   { {"trace", no_argument, NULL, 't'},
 208       't', NULL, N_("Trace file opens"), TWO_DASHES },
 209   { {"script", required_argument, NULL, 'T'},
 210       'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 211   { {"undefined", required_argument, NULL, 'u'},
 212       'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES },
 213   { {"version", no_argument, NULL, OPTION_VERSION},
 214       'v', NULL, N_("Print version information"), TWO_DASHES },
 215   { {NULL, no_argument, NULL, '\0'},
 216       'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 217   { {"discard-all", no_argument, NULL, 'x'},
 218       'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 219   { {"discard-locals", no_argument, NULL, 'X'},
 220       'X', NULL, N_("Discard temporary local symbols"), TWO_DASHES },
 221   { {"trace-symbol", required_argument, NULL, 'y'},
 222       'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 223   { {NULL, required_argument, NULL, '\0'},
 224       'Y', N_("PATH"), N_("Default search path for Solaris compatibility"), ONE_DASH },
 225   { {NULL, required_argument, NULL, '\0'},
 226       'z', N_("KEYWORD"), N_("Ignored for Solaris compatibility"), ONE_DASH },
 227   { {"start-group", no_argument, NULL, '('},
 228       '(', NULL, N_("Start a group"), TWO_DASHES },
 229   { {"end-group", no_argument, NULL, ')'},
 230       ')', NULL, N_("End a group"), TWO_DASHES },
 231   { {"assert", required_argument, NULL, OPTION_ASSERT},
 232       '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 233   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 234       '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 235   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 236       '\0', NULL, NULL, ONE_DASH },
 237   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 238       '\0', NULL, NULL, ONE_DASH },
 239   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 240       '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 241   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 242       '\0', NULL, NULL, ONE_DASH },
 243   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 244       '\0', NULL, NULL, ONE_DASH },
 245   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 246       '\0', NULL, NULL, ONE_DASH },
 247   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 248       '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 249   { {"cref", no_argument, NULL, OPTION_CREF},
 250       '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 251   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 252       '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 253   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 254       '\0', N_("PROGRAM"), N_("Set the dynamic linker to use"), TWO_DASHES },
 255   { {"EB", no_argument, NULL, OPTION_EB},
 256       '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 257   { {"EL", no_argument, NULL, OPTION_EL},
 258       '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 259   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 260       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 261   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 262       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 263   { {"help", no_argument, NULL, OPTION_HELP},
 264       '\0', NULL, N_("Print option help"), TWO_DASHES },
 265   { {"Map", required_argument, NULL, OPTION_MAP},
 266       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 267   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 268       '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 269   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 270       '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 271   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 272       '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 273   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 274       '\0', NULL, N_("Create an output file even if errors occur"), TWO_DASHES },
 275   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 276       '\0', NULL, NULL, NO_HELP },
 277   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 278       '\0', N_("TARGET"), N_("Specify target of output file"), TWO_DASHES },
 279   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 280       '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 281   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 282       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 283   { {"relax", no_argument, NULL, OPTION_RELAX},
 284       '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 285   { {"retain-symbols-file", required_argument, NULL,
 286        OPTION_RETAIN_SYMBOLS_FILE},
 287       '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 288   { {"rpath", required_argument, NULL, OPTION_RPATH},
 289       '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 290   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 291       '\0', N_("PATH"), N_("Set link time shared library search path"), ONE_DASH },
 292   { {"shared", no_argument, NULL, OPTION_SHARED},
 293       '\0', NULL, N_("Create a shared library"), ONE_DASH },
 294   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 295       '\0', NULL, NULL, ONE_DASH },
 296   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 297       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 298   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 299       '\0', NULL, NULL, NO_HELP },
 300   { {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 301       '\0', NULL, N_("Split output sections for each file"), TWO_DASHES },
 302   { {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 303       '\0', N_("COUNT"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 304   { {"stats", no_argument, NULL, OPTION_STATS},
 305       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 306   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 307       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 308   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 309       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 310   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 311       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 312   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 313       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 314   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 315       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 316   { {"Ur", no_argument, NULL, OPTION_UR},
 317       '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 318   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 319       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 320   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 321       '\0', NULL, NULL, NO_HELP },
 322   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 323       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 324   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 325       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 326   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 327       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 328       TWO_DASHES },
 329   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 330       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 331   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 332       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 333   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 334       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 335       TWO_DASHES },
 336   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 337       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 338   { {"wrap", required_argument, NULL, OPTION_WRAP},
 339       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES }
 340 };
 341
 342 #define OPTION_COUNT ((int) (sizeof ld_options / sizeof ld_options[0]))
 343
 344 void
 345 parse_args (argc, argv)
 346      int argc;
 347      char **argv;
 348 {
 349   int i, is, il;
 350   int ingroup = 0;
 351   char *default_dirlist = NULL;
 352   char shortopts[OPTION_COUNT * 3 + 2];
 353   struct option longopts[OPTION_COUNT + 1];
 354   int last_optind;
 355
 356   /* Starting the short option string with '-' is for programs that
 357      expect options and other ARGV-elements in any order and that care about
 358      the ordering of the two.  We describe each non-option ARGV-element
 359      as if it were the argument of an option with character code 1.  */
 360   shortopts[0] = '-';
 361   is = 1;
 362   il = 0;
 363   for (i = 0; i < OPTION_COUNT; i++)
 364     {
 365       if (ld_options[i].shortopt != '\0')
 366         {
 367           shortopts[is] = ld_options[i].shortopt;
 368           ++is;
 369           if (ld_options[i].opt.has_arg == required_argument
 370               || ld_options[i].opt.has_arg == optional_argument)
 371             {
 372               shortopts[is] = ':';
 373               ++is;
 374               if (ld_options[i].opt.has_arg == optional_argument)
 375                 {
 376                   shortopts[is] = ':';
 377                   ++is;
 378                 }
 379             }
 380         }
 381       if (ld_options[i].opt.name != NULL)
 382         {
 383           longopts[il] = ld_options[i].opt;
 384           ++il;
 385         }
 386     }
 387   shortopts[is] = '\0';
 388   longopts[il].name = NULL;
 389
 390   /* The -G option is ambiguous on different platforms.  Sometimes it
 391      specifies the largest data size to put into the small data
 392      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 393      the first form takes an argument, while the second does not.
 394
 395      We need to permit the --shared form because on some platforms,
 396      such as Solaris, gcc -shared will pass -G to the linker.
 397
 398      To permit either usage, we look through the argument list.  If we
 399      find -G not followed by a number, we change it into --shared.
 400      This will work for most normal cases.  */
 401   for (i = 1; i < argc; i++)
 402     if (strcmp (argv[i], "-G") == 0
 403         && (i + 1 >= argc
 404             || ! isdigit ((unsigned char) argv[i + 1][0])))
 405       argv[i] = (char *) "--shared";
 406
 407   /* Because we permit long options to start with a single dash, and
 408      we have a --library option, and the -l option is conventionally
 409      used with an immediately following argument, we can have bad
 410      results if somebody tries to use -l with a library whose name
 411      happens to start with "ibrary", as in -li.  We avoid problems by
 412      simply turning -l into --library.  This means that users will
 413      have to use two dashes in order to use --library, which is OK
 414      since that's how it is documented.
 415
 416      FIXME: It's possible that this problem can arise for other short
 417      options as well, although the user does always have the recourse
 418      of adding a space between the option and the argument.  */
 419   for (i = 1; i < argc; i++)
 420     {
 421       if (argv[i][0] == '-'
 422           && argv[i][1] == 'l'
 423           && argv[i][2] != '\0')
 424         {
 425           char *n;
 426
 427           n = (char *) xmalloc (strlen (argv[i]) + 20);
 428           sprintf (n, "--library=%s", argv[i] + 2);
 429           argv[i] = n;
 430         }
 431     }
 432
 433   last_optind = -1;
 434   while (1)
 435     {
 436       int longind;
 437       int optc;
 438
 439       /* Using last_optind lets us avoid calling ldemul_parse_args
 440          multiple times on a single option, which would lead to
 441          confusion in the internal static variables maintained by
 442          getopt.  This could otherwise happen for an argument like
 443          -nx, in which the -n is parsed as a single option, and we
 444          loop around to pick up the -x.  */
 445       if (optind != last_optind)
 446         {
 447           if (ldemul_parse_args (argc, argv))
 448             continue;
 449           last_optind = optind;
 450         }
 451
 452       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 453          can indicate a long option.  */
 454       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 455
 456       if (optc == -1)
 457         break;
 458       switch (optc)
 459         {
 460         default:
 461           xexit (1);
 462         case 1:                 /* File name.  */
 463           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 464                                (char *) NULL);
 465           break;
 466
 467         case OPTION_IGNORE:
 468           break;
 469         case 'a':
 470           /* For HP/UX compatibility.  Actually -a shared should mean
 471              ``use only shared libraries'' but, then, we don't
 472              currently support shared libraries on HP/UX anyhow.  */
 473           if (strcmp (optarg, "archive") == 0)
 474             config.dynamic_link = false;
 475           else if (strcmp (optarg, "shared") == 0
 476                    || strcmp (optarg, "default") == 0)
 477             config.dynamic_link = true;
 478           else
 479             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 480           break;
 481         case OPTION_ASSERT:
 482           /* FIXME: We just ignore these, but we should handle them.  */
 483           if (strcmp (optarg, "definitions") == 0)
 484             ;
 485           else if (strcmp (optarg, "nodefinitions") == 0)
 486             ;
 487           else if (strcmp (optarg, "nosymbolic") == 0)
 488             ;
 489           else if (strcmp (optarg, "pure-text") == 0)
 490             ;
 491           else
 492             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 493           break;
 494         case 'A':
 495           ldfile_add_arch (optarg);
 496           break;
 497         case 'b':
 498           lang_add_target (optarg);
 499           break;
 500         case 'c':
 501           ldfile_open_command_file (optarg);
 502           parser_input = input_mri_script;
 503           yyparse ();
 504           break;
 505         case OPTION_CALL_SHARED:
 506           config.dynamic_link = true;
 507           break;
 508         case OPTION_NON_SHARED:
 509           config.dynamic_link = false;
 510           break;
 511         case OPTION_CREF:
 512           command_line.cref = true;
 513           link_info.notice_all = true;
 514           break;
 515         case 'd':
 516           command_line.force_common_definition = true;
 517           break;
 518         case OPTION_DEFSYM:
 519           lex_string = optarg;
 520           lex_redirect (optarg);
 521           parser_input = input_defsym;
 522           parsing_defsym = 1;
 523           yyparse ();
 524           parsing_defsym = 0;
 525           lex_string = NULL;
 526           break;
 527         case OPTION_DYNAMIC_LINKER:
 528           command_line.interpreter = optarg;
 529           break;
 530         case OPTION_EB:
 531           command_line.endian = ENDIAN_BIG;
 532           break;
 533         case OPTION_EL:
 534           command_line.endian = ENDIAN_LITTLE;
 535           break;
 536         case OPTION_EMBEDDED_RELOCS:
 537           command_line.embedded_relocs = true;
 538           break;
 539         case OPTION_EXPORT_DYNAMIC:
 540         case 'E': /* HP/UX compatibility.  */
 541           command_line.export_dynamic = true;
 542           break;
 543         case 'e':
 544           lang_add_entry (optarg, true);
 545           break;
 546         case 'f':
 547           if (command_line.auxiliary_filters == NULL)
 548             {
 549               command_line.auxiliary_filters =
 550                 (char **) xmalloc (2 * sizeof (char *));
 551               command_line.auxiliary_filters[0] = optarg;
 552               command_line.auxiliary_filters[1] = NULL;
 553             }
 554           else
 555             {
 556               int c;
 557               char **p;
 558
 559               c = 0;
 560               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 561                 ++c;
 562               command_line.auxiliary_filters =
 563                 (char **) xrealloc (command_line.auxiliary_filters,
 564                                     (c + 2) * sizeof (char *));
 565               command_line.auxiliary_filters[c] = optarg;
 566               command_line.auxiliary_filters[c + 1] = NULL;
 567             }
 568           break;
 569         case 'F':
 570           command_line.filter_shlib = optarg;
 571           break;
 572         case OPTION_FORCE_EXE_SUFFIX:
 573           command_line.force_exe_suffix = true;
 574           break;
 575         case 'G':
 576           {
 577             char *end;
 578             g_switch_value = strtoul (optarg, &end, 0);
 579             if (*end)
 580               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 581           }
 582           break;
 583         case 'g':
 584           /* Ignore.  */
 585           break;
 586         case OPTION_GC_SECTIONS:
 587           command_line.gc_sections = true;
 588           break;
 589         case OPTION_HELP:
 590           help ();
 591           xexit (0);
 592           break;
 593         case 'L':
 594           ldfile_add_library_path (optarg, true);
 595           break;
 596         case 'l':
 597           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 598                                (char *) NULL);
 599           break;
 600         case 'M':
 601           config.map_filename = "-";
 602           break;
 603         case 'm':
 604           /* Ignore.  Was handled in a pre-parse.   */
 605           break;
 606         case OPTION_MAP:
 607           config.map_filename = optarg;
 608           break;
 609         case 'N':
 610           config.text_read_only = false;
 611           config.magic_demand_paged = false;
 612           config.dynamic_link = false;
 613           break;
 614         case 'n':
 615           config.magic_demand_paged = false;
 616           config.dynamic_link = false;
 617           break;
 618         case OPTION_NO_GC_SECTIONS:
 619           command_line.gc_sections = false;
 620           break;
 621         case OPTION_NO_KEEP_MEMORY:
 622           link_info.keep_memory = false;
 623           break;
 624         case OPTION_NO_WARN_MISMATCH:
 625           command_line.warn_mismatch = false;
 626           break;
 627         case OPTION_NOINHIBIT_EXEC:
 628           force_make_executable = true;
 629           break;
 630         case OPTION_NO_WHOLE_ARCHIVE:
 631           whole_archive = false;
 632           break;
 633         case 'O':
 634           /* FIXME "-O<non-digits> <value>" used to set the address of
 635              section <non-digits>.  Was this for compatibility with
 636              something, or can we create a new option to do that
 637              (with a syntax similar to -defsym)?
 638              getopt can't handle two args to an option without kludges.  */
 639           break;
 640         case 'o':
 641           lang_add_output (optarg, 0);
 642           break;
 643         case OPTION_OFORMAT:
 644           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 645           break;
 646         case 'i':
 647         case 'r':
 648           link_info.relocateable = true;
 649           config.build_constructors = false;
 650           config.magic_demand_paged = false;
 651           config.text_read_only = false;
 652           config.dynamic_link = false;
 653           break;
 654         case 'R':
 655           /* The GNU linker traditionally uses -R to mean to include
 656              only the symbols from a file.  The Solaris linker uses -R
 657              to set the path used by the runtime linker to find
 658              libraries.  This is the GNU linker -rpath argument.  We
 659              try to support both simultaneously by checking the file
 660              named.  If it is a directory, rather than a regular file,
 661              we assume -rpath was meant.  */
 662           {
 663             struct stat s;
 664
 665             if (stat (optarg, &s) >= 0
 666                 && ! S_ISDIR (s.st_mode))
 667               {
 668                 lang_add_input_file (optarg,
 669                                      lang_input_file_is_symbols_only_enum,
 670                                      (char *) NULL);
 671                 break;
 672               }
 673           }
 674           /* Fall through.  */
 675         case OPTION_RPATH:
 676           if (command_line.rpath == NULL)
 677             command_line.rpath = buystring (optarg);
 678           else
 679             {
 680               char *buf;
 681
 682               buf = xmalloc (strlen (command_line.rpath)
 683                              + strlen (optarg)
 684                              + 2);
 685               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 686               free (command_line.rpath);
 687               command_line.rpath = buf;
 688             }
 689           break;
 690         case OPTION_RPATH_LINK:
 691           if (command_line.rpath_link == NULL)
 692             command_line.rpath_link = buystring (optarg);
 693           else
 694             {
 695               char *buf;
 696
 697               buf = xmalloc (strlen (command_line.rpath_link)
 698                              + strlen (optarg)
 699                              + 2);
 700               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 701               free (command_line.rpath_link);
 702               command_line.rpath_link = buf;
 703             }
 704           break;
 705         case OPTION_RELAX:
 706           command_line.relax = true;
 707           break;
 708         case OPTION_RETAIN_SYMBOLS_FILE:
 709           add_keepsyms_file (optarg);
 710           break;
 711         case 'S':
 712           link_info.strip = strip_debugger;
 713           break;
 714         case 's':
 715           link_info.strip = strip_all;
 716           break;
 717         case OPTION_SHARED:
 718           if (config.has_shared)
 719             link_info.shared = true;
 720           else
 721             einfo (_("%P%F: -shared not supported\n"));
 722           break;
 723         case 'h':               /* Used on Solaris.  */
 724         case OPTION_SONAME:
 725           command_line.soname = optarg;
 726           break;
 727         case OPTION_SORT_COMMON:
 728           config.sort_common = true;
 729           break;
 730         case OPTION_STATS:
 731           config.stats = true;
 732           break;
 733         case OPTION_SYMBOLIC:
 734           link_info.symbolic = true;
 735           break;
 736         case 't':
 737           trace_files = true;
 738           break;
 739         case 'T':
 740           ldfile_open_command_file (optarg);
 741           parser_input = input_script;
 742           yyparse ();
 743           break;
 744         case OPTION_TBSS:
 745           set_section_start (".bss", optarg);
 746           break;
 747         case OPTION_TDATA:
 748           set_section_start (".data", optarg);
 749           break;
 750         case OPTION_TTEXT:
 751           set_section_start (".text", optarg);
 752           break;
 753         case OPTION_TRADITIONAL_FORMAT:
 754           link_info.traditional_format = true;
 755           break;
 756         case OPTION_TASK_LINK:
 757           link_info.task_link = true;
 758           /* Fall through - do an implied -r option.  */
 759         case OPTION_UR:
 760           link_info.relocateable = true;
 761           config.build_constructors = true;
 762           config.magic_demand_paged = false;
 763           config.text_read_only = false;
 764           config.dynamic_link = false;
 765           break;
 766         case 'u':
 767           ldlang_add_undef (optarg);
 768           break;
 769         case OPTION_VERBOSE:
 770           ldversion (1);
 771           version_printed = true;
 772           trace_file_tries = true;
 773           break;
 774         case 'v':
 775           ldversion (0);
 776           version_printed = true;
 777           break;
 778         case 'V':
 779           ldversion (1);
 780           version_printed = true;
 781           break;
 782         case OPTION_VERSION:
 783           /* This output is intended to follow the GNU standards document.  */
 784           printf ("GNU ld %s\n", ld_program_version);
 785           printf (_("Copyright 1997 Free Software Foundation, Inc.\n"));
 786           printf (_("\
 787 This program is free software; you may redistribute it under the terms of\n\
 788 the GNU General Public License.  This program has absolutely no warranty.\n"));
 789           {
 790             ld_emulation_xfer_type **ptr = ld_emulations;
 791
 792             printf (_("  Supported emulations:\n"));
 793             while (*ptr)
 794               {
 795                 printf ("   %s\n", (*ptr)->emulation_name);
 796                 ptr++;
 797               }
 798           }
 799           xexit (0);
 800           break;
 801         case OPTION_VERSION_SCRIPT:
 802           /* This option indicates a small script that only specifies
 803              version information.  Read it, but don't assume that
 804              we've seen a linker script.  */
 805           {
 806             boolean hold_had_script;
 807
 808             hold_had_script = had_script;
 809             ldfile_open_command_file (optarg);
 810             had_script = hold_had_script;
 811             parser_input = input_version_script;
 812             yyparse ();
 813           }
 814           break;
 815         case OPTION_WARN_COMMON:
 816           config.warn_common = true;
 817           break;
 818         case OPTION_WARN_CONSTRUCTORS:
 819           config.warn_constructors = true;
 820           break;
 821         case OPTION_WARN_MULTIPLE_GP:
 822           config.warn_multiple_gp = true;
 823           break;
 824         case OPTION_WARN_ONCE:
 825           config.warn_once = true;
 826           break;
 827         case OPTION_WARN_SECTION_ALIGN:
 828           config.warn_section_align = true;
 829           break;
 830         case OPTION_WHOLE_ARCHIVE:
 831           whole_archive = true;
 832           break;
 833         case OPTION_WRAP:
 834           add_wrap (optarg);
 835           break;
 836         case 'X':
 837           link_info.discard = discard_l;
 838           break;
 839         case 'x':
 840           link_info.discard = discard_all;
 841           break;
 842         case 'Y':
 843           if (strncmp (optarg, "P,", 2) == 0)
 844             optarg += 2;
 845           default_dirlist = xstrdup (optarg);
 846           break;
 847         case 'y':
 848           add_ysym (optarg);
 849           break;
 850         case 'z':
 851           /* We accept and ignore this option for Solaris
 852              compatibility.  Actually, on Solaris, optarg is not
 853              ignored.  Someday we should handle it correctly.  FIXME.  */
 854           break;
 855         case OPTION_SPLIT_BY_RELOC:
 856           config.split_by_reloc = atoi (optarg);
 857           break;
 858         case OPTION_SPLIT_BY_FILE:
 859           config.split_by_file = true;
 860           break;
 861         case '(':
 862           if (ingroup)
 863             {
 864               fprintf (stderr,
 865                        _("%s: may not nest groups (--help for usage)\n"),
 866                        program_name);
 867               xexit (1);
 868             }
 869           lang_enter_group ();
 870           ingroup = 1;
 871           break;
 872         case ')':
 873           if (! ingroup)
 874             {
 875               fprintf (stderr,
 876                        _("%s: group ended before it began (--help for usage)\n"),
 877                        program_name);
 878               xexit (1);
 879             }
 880           lang_leave_group ();
 881           ingroup = 0;
 882           break;
 883
 884         }
 885     }
 886
 887   if (ingroup)
 888     lang_leave_group ();
 889
 890   if (default_dirlist != NULL)
 891     set_default_dirlist (default_dirlist);
 892
 893 }
 894
 895 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 896    library search path.  */
 897
 898 static void
 899 set_default_dirlist (dirlist_ptr)
 900      char *dirlist_ptr;
 901 {
 902   char *p;
 903
 904   while (1)
 905     {
 906       p = strchr (dirlist_ptr, PATH_SEPARATOR);
 907       if (p != NULL)
 908         *p = '\0';
 909       if (*dirlist_ptr != '\0')
 910         ldfile_add_library_path (dirlist_ptr, true);
 911       if (p == NULL)
 912         break;
 913       dirlist_ptr = p + 1;
 914     }
 915 }
 916
 917 static void
 918 set_section_start (sect, valstr)
 919      char *sect, *valstr;
 920 {
 921   char *end;
 922   unsigned long val = strtoul (valstr, &end, 16);
 923   if (*end)
 924     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
 925   lang_section_start (sect, exp_intop (val));
 926 }
 927 \f
 928 /* Print help messages for the options.  */
 929
 930 static void
 931 help ()
 932 {
 933   int i;
 934   const char **targets, **pp;
 935
 936   printf (_("Usage: %s [options] file...\n"), program_name);
 937
 938   printf (_("Options:\n"));
 939   for (i = 0; i < OPTION_COUNT; i++)
 940     {
 941       if (ld_options[i].doc != NULL)
 942         {
 943           boolean comma;
 944           int len;
 945           int j;
 946
 947           printf ("  ");
 948
 949           comma = false;
 950           len = 2;
 951
 952           j = i;
 953           do
 954             {
 955               if (ld_options[j].shortopt != '\0'
 956                   && ld_options[j].control != NO_HELP)
 957                 {
 958                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
 959                   len += (comma ? 2 : 0) + 2;
 960                   if (ld_options[j].arg != NULL)
 961                     {
 962                       if (ld_options[j].opt.has_arg != optional_argument)
 963                         {
 964                           printf (" ");
 965                           ++len;
 966                         }
 967                       printf ("%s", _(ld_options[j].arg));
 968                       len += strlen (_(ld_options[j].arg));
 969                     }
 970                   comma = true;
 971                 }
 972               ++j;
 973             }
 974           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
 975
 976           j = i;
 977           do
 978             {
 979               if (ld_options[j].opt.name != NULL
 980                   && ld_options[j].control != NO_HELP)
 981                 {
 982                   printf ("%s-%s%s",
 983                           comma ? ", " : "",
 984                           ld_options[j].control == TWO_DASHES ? "-" : "",
 985                           ld_options[j].opt.name);
 986                   len += ((comma ? 2 : 0)
 987                           + 1
 988                           + (ld_options[j].control == TWO_DASHES ? 1 : 0)
 989                           + strlen (ld_options[j].opt.name));
 990                   if (ld_options[j].arg != NULL)
 991                     {
 992                       printf (" %s", _(ld_options[j].arg));
 993                       len += 1 + strlen (_(ld_options[j].arg));
 994                     }
 995                   comma = true;
 996                 }
 997               ++j;
 998             }
 999           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1000
1001           if (len >= 30)
1002             {
1003               printf ("\n");
1004               len = 0;
1005             }
1006
1007           for (; len < 30; len++)
1008             putchar (' ');
1009
1010           printf ("%s\n", _(ld_options[i].doc));
1011         }
1012     }
1013
1014   /* xgettext:c-format */
1015   printf (_("%s: supported targets:"), program_name);
1016   targets = bfd_target_list ();
1017   for (pp = targets; *pp != NULL; pp++)
1018     printf (" %s", *pp);
1019   free (targets);
1020   printf ("\n");
1021
1022   /* xgettext:c-format */
1023   printf (_("%s: supported emulations: "), program_name);
1024   ldemul_list_emulations (stdout);
1025   printf ("\n");
1026
1027   /* xgettext:c-format */
1028   printf (_("%s: emulation specific options:\n"), program_name);
1029   ldemul_list_emulation_options (stdout);
1030   printf ("\n");
1031
1032   printf (_("\nReport bugs to bug-gnu-utils@gnu.org\n"));
1033 }