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_VERSION_EXPORTS_SECTION  (OPTION_VERSION_SCRIPT + 1)
 105 #define OPTION_WARN_COMMON              (OPTION_VERSION_EXPORTS_SECTION + 1)
 106 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
 107 #define OPTION_WARN_MULTIPLE_GP         (OPTION_WARN_CONSTRUCTORS + 1)
 108 #define OPTION_WARN_ONCE                (OPTION_WARN_MULTIPLE_GP + 1)
 109 #define OPTION_WARN_SECTION_ALIGN       (OPTION_WARN_ONCE + 1)
 110 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_SECTION_ALIGN + 1)
 111 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 112 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 113 #define OPTION_WRAP                     (OPTION_WHOLE_ARCHIVE + 1)
 114 #define OPTION_FORCE_EXE_SUFFIX         (OPTION_WRAP + 1)
 115 #define OPTION_GC_SECTIONS              (OPTION_FORCE_EXE_SUFFIX + 1)
 116 #define OPTION_NO_GC_SECTIONS           (OPTION_GC_SECTIONS + 1)
 117 #define OPTION_CHECK_SECTIONS           (OPTION_NO_GC_SECTIONS + 1)
 118 #define OPTION_NO_CHECK_SECTIONS        (OPTION_CHECK_SECTIONS + 1)
 119
 120 /* The long options.  This structure is used for both the option
 121    parsing and the help text.  */
 122
 123 struct ld_option
 124 {
 125   /* The long option information.  */
 126   struct option opt;
 127   /* The short option with the same meaning ('\0' if none).  */
 128   char shortopt;
 129   /* The name of the argument (NULL if none).  */
 130   const char *arg;
 131   /* The documentation string.  If this is NULL, this is a synonym for
 132      the previous option.  */
 133   const char *doc;
 134   enum
 135     {
 136       /* Use one dash before long option name.  */
 137       ONE_DASH,
 138       /* Use two dashes before long option name.  */
 139       TWO_DASHES,
 140       /* Don't mention this option in --help output.  */
 141       NO_HELP
 142     } control;
 143 };
 144
 145 static const struct ld_option ld_options[] =
 146 {
 147   { {NULL, required_argument, NULL, '\0'},
 148       'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 149       ONE_DASH },
 150   { {"architecture", required_argument, NULL, 'A'},
 151       'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 152   { {"format", required_argument, NULL, 'b'},
 153       'b', N_("TARGET"), N_("Specify target for following input files"), TWO_DASHES },
 154   { {"mri-script", required_argument, NULL, 'c'},
 155       'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 156   { {"dc", no_argument, NULL, 'd'},
 157       'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 158   { {"dp", no_argument, NULL, 'd'},
 159       '\0', NULL, NULL, ONE_DASH },
 160   { {"entry", required_argument, NULL, 'e'},
 161       'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 162   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 163       'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 164   { {"EB", no_argument, NULL, OPTION_EB},
 165       '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 166   { {"EL", no_argument, NULL, OPTION_EL},
 167       '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 168   { {"auxiliary", required_argument, NULL, 'f'},
 169       'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 170       TWO_DASHES },
 171   { {"filter", required_argument, NULL, 'F'},
 172       'F', N_("SHLIB"), N_("Filter for shared object symbol table"), TWO_DASHES },
 173   { {NULL, no_argument, NULL, '\0'},
 174       'g', NULL, N_("Ignored"), ONE_DASH },
 175   { {"gpsize", required_argument, NULL, 'G'},
 176       'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 177       TWO_DASHES },
 178   { {"soname", required_argument, NULL, OPTION_SONAME},
 179       'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 180   { {"library", required_argument, NULL, 'l'},
 181       'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 182   { {"library-path", required_argument, NULL, 'L'},
 183       'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"), TWO_DASHES },
 184   { {NULL, required_argument, NULL, '\0'},
 185       'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 186   { {"print-map", no_argument, NULL, 'M'},
 187       'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 188   { {"nmagic", no_argument, NULL, 'n'},
 189       'n', NULL, N_("Do not page align data"), TWO_DASHES },
 190   { {"omagic", no_argument, NULL, 'N'},
 191       'N', NULL, N_("Do not page align data, do not make text readonly"),
 192       TWO_DASHES },
 193   { {"output", required_argument, NULL, 'o'},
 194       'o', N_("FILE"), N_("Set output file name"), TWO_DASHES },
 195   { {NULL, required_argument, NULL, '\0'},
 196       'O', NULL, N_("Optimize output file"), ONE_DASH },
 197   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 198       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 199   { {"relocateable", no_argument, NULL, 'r'},
 200       'r', NULL, N_("Generate relocateable output"), TWO_DASHES },
 201   { {NULL, no_argument, NULL, '\0'},
 202       'i', NULL, NULL, ONE_DASH },
 203   { {"just-symbols", required_argument, NULL, 'R'},
 204       'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 205       TWO_DASHES },
 206   { {"strip-all", no_argument, NULL, 's'},
 207       's', NULL, N_("Strip all symbols"), TWO_DASHES },
 208   { {"strip-debug", no_argument, NULL, 'S'},
 209       'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 210   { {"trace", no_argument, NULL, 't'},
 211       't', NULL, N_("Trace file opens"), TWO_DASHES },
 212   { {"script", required_argument, NULL, 'T'},
 213       'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 214   { {"undefined", required_argument, NULL, 'u'},
 215       'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES },
 216   { {"Ur", no_argument, NULL, OPTION_UR},
 217       '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 218   { {"version", no_argument, NULL, OPTION_VERSION},
 219       'v', NULL, N_("Print version information"), TWO_DASHES },
 220   { {NULL, no_argument, NULL, '\0'},
 221       'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 222   { {"discard-all", no_argument, NULL, 'x'},
 223       'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 224   { {"discard-locals", no_argument, NULL, 'X'},
 225       'X', NULL, N_("Discard temporary local symbols"), TWO_DASHES },
 226   { {"trace-symbol", required_argument, NULL, 'y'},
 227       'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 228   { {NULL, required_argument, NULL, '\0'},
 229       'Y', N_("PATH"), N_("Default search path for Solaris compatibility"), ONE_DASH },
 230   { {NULL, required_argument, NULL, '\0'},
 231       'z', N_("KEYWORD"), N_("Ignored for Solaris compatibility"), ONE_DASH },
 232   { {"start-group", no_argument, NULL, '('},
 233       '(', NULL, N_("Start a group"), TWO_DASHES },
 234   { {"end-group", no_argument, NULL, ')'},
 235       ')', NULL, N_("End a group"), TWO_DASHES },
 236   { {"assert", required_argument, NULL, OPTION_ASSERT},
 237       '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 238   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 239       '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 240   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 241       '\0', NULL, NULL, ONE_DASH },
 242   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 243       '\0', NULL, NULL, ONE_DASH },
 244   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 245       '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 246   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 247       '\0', NULL, NULL, ONE_DASH },
 248   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 249       '\0', NULL, NULL, ONE_DASH },
 250   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 251       '\0', NULL, NULL, ONE_DASH },
 252   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 253       '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 254   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 255       '\0', NULL, N_("Check section addresses for overlaps (default)"), TWO_DASHES },
 256   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 257       '\0', NULL, N_("Do not check section addresses for overlaps"),
 258       TWO_DASHES },
 259   { {"cref", no_argument, NULL, OPTION_CREF},
 260       '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 261   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 262       '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 263   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 264       '\0', N_("PROGRAM"), N_("Set the dynamic linker to use"), TWO_DASHES },
 265   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 266       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 267   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 268       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 269   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 270       '\0', NULL, N_("Remove unused sections (on some targets)"),
 271       TWO_DASHES },
 272   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 273       '\0', NULL, N_("Don't remove unused sections (default)"),
 274       TWO_DASHES },
 275   { {"help", no_argument, NULL, OPTION_HELP},
 276       '\0', NULL, N_("Print option help"), TWO_DASHES },
 277   { {"Map", required_argument, NULL, OPTION_MAP},
 278       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 279   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 280       '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 281   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 282       '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 283   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 284       '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 285   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 286       '\0', NULL, N_("Create an output file even if errors occur"), TWO_DASHES },
 287   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 288       '\0', NULL, NULL, NO_HELP },
 289   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 290       '\0', N_("TARGET"), N_("Specify target of output file"), TWO_DASHES },
 291   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 292       '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 293   { {"relax", no_argument, NULL, OPTION_RELAX},
 294       '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 295   { {"retain-symbols-file", required_argument, NULL,
 296        OPTION_RETAIN_SYMBOLS_FILE},
 297       '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 298   { {"rpath", required_argument, NULL, OPTION_RPATH},
 299       '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 300   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 301       '\0', N_("PATH"), N_("Set link time shared library search path"), ONE_DASH },
 302   { {"shared", no_argument, NULL, OPTION_SHARED},
 303       '\0', NULL, N_("Create a shared library"), ONE_DASH },
 304   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 305       '\0', NULL, NULL, ONE_DASH },
 306   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 307       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 308   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 309       '\0', NULL, NULL, NO_HELP },
 310   { {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 311       '\0', NULL, N_("Split output sections for each file"), TWO_DASHES },
 312   { {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 313       '\0', N_("COUNT"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 314   { {"stats", no_argument, NULL, OPTION_STATS},
 315       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 316   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 317       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 318   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 319       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 320   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 321       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 322   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 323       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 324   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 325       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 326   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 327       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 328   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 329       '\0', NULL, NULL, NO_HELP },
 330   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 331       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 332   { {"version-exports-section", required_argument, NULL,
 333      OPTION_VERSION_EXPORTS_SECTION },
 334     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using SYMBOL as the version."),
 335     TWO_DASHES },
 336   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 337       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 338   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 339       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 340       TWO_DASHES },
 341   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 342       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 343   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 344       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 345   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 346       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 347       TWO_DASHES },
 348   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 349       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 350   { {"wrap", required_argument, NULL, OPTION_WRAP},
 351       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES }
 352 };
 353
 354 #define OPTION_COUNT ((int) (sizeof ld_options / sizeof ld_options[0]))
 355
 356 void
 357 parse_args (argc, argv)
 358      int argc;
 359      char **argv;
 360 {
 361   int i, is, il;
 362   int ingroup = 0;
 363   char *default_dirlist = NULL;
 364   char shortopts[OPTION_COUNT * 3 + 2];
 365   struct option longopts[OPTION_COUNT + 1];
 366   int last_optind;
 367
 368   /* Starting the short option string with '-' is for programs that
 369      expect options and other ARGV-elements in any order and that care about
 370      the ordering of the two.  We describe each non-option ARGV-element
 371      as if it were the argument of an option with character code 1.  */
 372   shortopts[0] = '-';
 373   is = 1;
 374   il = 0;
 375   for (i = 0; i < OPTION_COUNT; i++)
 376     {
 377       if (ld_options[i].shortopt != '\0')
 378         {
 379           shortopts[is] = ld_options[i].shortopt;
 380           ++is;
 381           if (ld_options[i].opt.has_arg == required_argument
 382               || ld_options[i].opt.has_arg == optional_argument)
 383             {
 384               shortopts[is] = ':';
 385               ++is;
 386               if (ld_options[i].opt.has_arg == optional_argument)
 387                 {
 388                   shortopts[is] = ':';
 389                   ++is;
 390                 }
 391             }
 392         }
 393       if (ld_options[i].opt.name != NULL)
 394         {
 395           longopts[il] = ld_options[i].opt;
 396           ++il;
 397         }
 398     }
 399   shortopts[is] = '\0';
 400   longopts[il].name = NULL;
 401
 402   /* The -G option is ambiguous on different platforms.  Sometimes it
 403      specifies the largest data size to put into the small data
 404      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 405      the first form takes an argument, while the second does not.
 406
 407      We need to permit the --shared form because on some platforms,
 408      such as Solaris, gcc -shared will pass -G to the linker.
 409
 410      To permit either usage, we look through the argument list.  If we
 411      find -G not followed by a number, we change it into --shared.
 412      This will work for most normal cases.  */
 413   for (i = 1; i < argc; i++)
 414     if (strcmp (argv[i], "-G") == 0
 415         && (i + 1 >= argc
 416             || ! isdigit ((unsigned char) argv[i + 1][0])))
 417       argv[i] = (char *) "--shared";
 418
 419   /* Because we permit long options to start with a single dash, and
 420      we have a --library option, and the -l option is conventionally
 421      used with an immediately following argument, we can have bad
 422      results if somebody tries to use -l with a library whose name
 423      happens to start with "ibrary", as in -li.  We avoid problems by
 424      simply turning -l into --library.  This means that users will
 425      have to use two dashes in order to use --library, which is OK
 426      since that's how it is documented.
 427
 428      FIXME: It's possible that this problem can arise for other short
 429      options as well, although the user does always have the recourse
 430      of adding a space between the option and the argument.  */
 431   for (i = 1; i < argc; i++)
 432     {
 433       if (argv[i][0] == '-'
 434           && argv[i][1] == 'l'
 435           && argv[i][2] != '\0')
 436         {
 437           char *n;
 438
 439           n = (char *) xmalloc (strlen (argv[i]) + 20);
 440           sprintf (n, "--library=%s", argv[i] + 2);
 441           argv[i] = n;
 442         }
 443     }
 444
 445   last_optind = -1;
 446   while (1)
 447     {
 448       int longind;
 449       int optc;
 450
 451       /* Using last_optind lets us avoid calling ldemul_parse_args
 452          multiple times on a single option, which would lead to
 453          confusion in the internal static variables maintained by
 454          getopt.  This could otherwise happen for an argument like
 455          -nx, in which the -n is parsed as a single option, and we
 456          loop around to pick up the -x.  */
 457       if (optind != last_optind)
 458         {
 459           if (ldemul_parse_args (argc, argv))
 460             continue;
 461           last_optind = optind;
 462         }
 463
 464       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 465          can indicate a long option.  */
 466       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 467
 468       if (optc == -1)
 469         break;
 470       switch (optc)
 471         {
 472         default:
 473           xexit (1);
 474         case 1:                 /* File name.  */
 475           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 476                                (char *) NULL);
 477           break;
 478
 479         case OPTION_IGNORE:
 480           break;
 481         case 'a':
 482           /* For HP/UX compatibility.  Actually -a shared should mean
 483              ``use only shared libraries'' but, then, we don't
 484              currently support shared libraries on HP/UX anyhow.  */
 485           if (strcmp (optarg, "archive") == 0)
 486             config.dynamic_link = false;
 487           else if (strcmp (optarg, "shared") == 0
 488                    || strcmp (optarg, "default") == 0)
 489             config.dynamic_link = true;
 490           else
 491             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 492           break;
 493         case OPTION_ASSERT:
 494           /* FIXME: We just ignore these, but we should handle them.  */
 495           if (strcmp (optarg, "definitions") == 0)
 496             ;
 497           else if (strcmp (optarg, "nodefinitions") == 0)
 498             ;
 499           else if (strcmp (optarg, "nosymbolic") == 0)
 500             ;
 501           else if (strcmp (optarg, "pure-text") == 0)
 502             ;
 503           else
 504             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 505           break;
 506         case 'A':
 507           ldfile_add_arch (optarg);
 508           break;
 509         case 'b':
 510           lang_add_target (optarg);
 511           break;
 512         case 'c':
 513           ldfile_open_command_file (optarg);
 514           parser_input = input_mri_script;
 515           yyparse ();
 516           break;
 517         case OPTION_CALL_SHARED:
 518           config.dynamic_link = true;
 519           break;
 520         case OPTION_NON_SHARED:
 521           config.dynamic_link = false;
 522           break;
 523         case OPTION_CREF:
 524           command_line.cref = true;
 525           link_info.notice_all = true;
 526           break;
 527         case 'd':
 528           command_line.force_common_definition = true;
 529           break;
 530         case OPTION_DEFSYM:
 531           lex_string = optarg;
 532           lex_redirect (optarg);
 533           parser_input = input_defsym;
 534           parsing_defsym = 1;
 535           yyparse ();
 536           parsing_defsym = 0;
 537           lex_string = NULL;
 538           break;
 539         case OPTION_DYNAMIC_LINKER:
 540           command_line.interpreter = optarg;
 541           break;
 542         case OPTION_EB:
 543           command_line.endian = ENDIAN_BIG;
 544           break;
 545         case OPTION_EL:
 546           command_line.endian = ENDIAN_LITTLE;
 547           break;
 548         case OPTION_EMBEDDED_RELOCS:
 549           command_line.embedded_relocs = true;
 550           break;
 551         case OPTION_EXPORT_DYNAMIC:
 552         case 'E': /* HP/UX compatibility.  */
 553           command_line.export_dynamic = true;
 554           break;
 555         case 'e':
 556           lang_add_entry (optarg, true);
 557           break;
 558         case 'f':
 559           if (command_line.auxiliary_filters == NULL)
 560             {
 561               command_line.auxiliary_filters =
 562                 (char **) xmalloc (2 * sizeof (char *));
 563               command_line.auxiliary_filters[0] = optarg;
 564               command_line.auxiliary_filters[1] = NULL;
 565             }
 566           else
 567             {
 568               int c;
 569               char **p;
 570
 571               c = 0;
 572               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 573                 ++c;
 574               command_line.auxiliary_filters =
 575                 (char **) xrealloc (command_line.auxiliary_filters,
 576                                     (c + 2) * sizeof (char *));
 577               command_line.auxiliary_filters[c] = optarg;
 578               command_line.auxiliary_filters[c + 1] = NULL;
 579             }
 580           break;
 581         case 'F':
 582           command_line.filter_shlib = optarg;
 583           break;
 584         case OPTION_FORCE_EXE_SUFFIX:
 585           command_line.force_exe_suffix = true;
 586           break;
 587         case 'G':
 588           {
 589             char *end;
 590             g_switch_value = strtoul (optarg, &end, 0);
 591             if (*end)
 592               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 593           }
 594           break;
 595         case 'g':
 596           /* Ignore.  */
 597           break;
 598         case OPTION_GC_SECTIONS:
 599           command_line.gc_sections = true;
 600           break;
 601         case OPTION_HELP:
 602           help ();
 603           xexit (0);
 604           break;
 605         case 'L':
 606           ldfile_add_library_path (optarg, true);
 607           break;
 608         case 'l':
 609           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 610                                (char *) NULL);
 611           break;
 612         case 'M':
 613           config.map_filename = "-";
 614           break;
 615         case 'm':
 616           /* Ignore.  Was handled in a pre-parse.   */
 617           break;
 618         case OPTION_MAP:
 619           config.map_filename = optarg;
 620           break;
 621         case 'N':
 622           config.text_read_only = false;
 623           config.magic_demand_paged = false;
 624           config.dynamic_link = false;
 625           break;
 626         case 'n':
 627           config.magic_demand_paged = false;
 628           config.dynamic_link = false;
 629           break;
 630         case OPTION_NO_GC_SECTIONS:
 631           command_line.gc_sections = false;
 632           break;
 633         case OPTION_NO_KEEP_MEMORY:
 634           link_info.keep_memory = false;
 635           break;
 636         case OPTION_NO_WARN_MISMATCH:
 637           command_line.warn_mismatch = false;
 638           break;
 639         case OPTION_NOINHIBIT_EXEC:
 640           force_make_executable = true;
 641           break;
 642         case OPTION_NO_WHOLE_ARCHIVE:
 643           whole_archive = false;
 644           break;
 645         case 'O':
 646           /* FIXME "-O<non-digits> <value>" used to set the address of
 647              section <non-digits>.  Was this for compatibility with
 648              something, or can we create a new option to do that
 649              (with a syntax similar to -defsym)?
 650              getopt can't handle two args to an option without kludges.  */
 651
 652           /* Enable optimizations of output files.  */
 653           link_info.optimize = strtoul (optarg, NULL, 0) ? true : false;
 654           break;
 655         case 'o':
 656           lang_add_output (optarg, 0);
 657           break;
 658         case OPTION_OFORMAT:
 659           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 660           break;
 661         case 'i':
 662         case 'r':
 663           link_info.relocateable = true;
 664           config.build_constructors = false;
 665           config.magic_demand_paged = false;
 666           config.text_read_only = false;
 667           config.dynamic_link = false;
 668           break;
 669         case 'R':
 670           /* The GNU linker traditionally uses -R to mean to include
 671              only the symbols from a file.  The Solaris linker uses -R
 672              to set the path used by the runtime linker to find
 673              libraries.  This is the GNU linker -rpath argument.  We
 674              try to support both simultaneously by checking the file
 675              named.  If it is a directory, rather than a regular file,
 676              we assume -rpath was meant.  */
 677           {
 678             struct stat s;
 679
 680             if (stat (optarg, &s) >= 0
 681                 && ! S_ISDIR (s.st_mode))
 682               {
 683                 lang_add_input_file (optarg,
 684                                      lang_input_file_is_symbols_only_enum,
 685                                      (char *) NULL);
 686                 break;
 687               }
 688           }
 689           /* Fall through.  */
 690         case OPTION_RPATH:
 691           if (command_line.rpath == NULL)
 692             command_line.rpath = buystring (optarg);
 693           else
 694             {
 695               size_t rpath_len = strlen (command_line.rpath);
 696               size_t optarg_len = strlen (optarg);
 697               char *buf;
 698               char *cp = command_line.rpath;
 699
 700               /* First see whether OPTARG is already in the path.  */
 701               do
 702                 {
 703                   size_t idx = 0;
 704                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 705                     ++idx;
 706                   if (optarg[idx] == '\0'
 707                       && (cp[idx] == '\0' || cp[idx] == ':'))
 708                     /* We found it.  */
 709                     break;
 710
 711                   /* Not yet found.  */
 712                   cp = strchr (cp, ':');
 713                   if (cp != NULL)
 714                     ++cp;
 715                 }
 716               while (cp != NULL);
 717
 718               if (cp == NULL)
 719                 {
 720                   buf = xmalloc (rpath_len + optarg_len + 2);
 721                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
 722                   free (command_line.rpath);
 723                   command_line.rpath = buf;
 724                 }
 725             }
 726           break;
 727         case OPTION_RPATH_LINK:
 728           if (command_line.rpath_link == NULL)
 729             command_line.rpath_link = buystring (optarg);
 730           else
 731             {
 732               char *buf;
 733
 734               buf = xmalloc (strlen (command_line.rpath_link)
 735                              + strlen (optarg)
 736                              + 2);
 737               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 738               free (command_line.rpath_link);
 739               command_line.rpath_link = buf;
 740             }
 741           break;
 742         case OPTION_RELAX:
 743           command_line.relax = true;
 744           break;
 745         case OPTION_RETAIN_SYMBOLS_FILE:
 746           add_keepsyms_file (optarg);
 747           break;
 748         case 'S':
 749           link_info.strip = strip_debugger;
 750           break;
 751         case 's':
 752           link_info.strip = strip_all;
 753           break;
 754         case OPTION_SHARED:
 755           if (config.has_shared)
 756             link_info.shared = true;
 757           else
 758             einfo (_("%P%F: -shared not supported\n"));
 759           break;
 760         case 'h':               /* Used on Solaris.  */
 761         case OPTION_SONAME:
 762           command_line.soname = optarg;
 763           break;
 764         case OPTION_SORT_COMMON:
 765           config.sort_common = true;
 766           break;
 767         case OPTION_STATS:
 768           config.stats = true;
 769           break;
 770         case OPTION_SYMBOLIC:
 771           link_info.symbolic = true;
 772           break;
 773         case 't':
 774           trace_files = true;
 775           break;
 776         case 'T':
 777           ldfile_open_command_file (optarg);
 778           parser_input = input_script;
 779           yyparse ();
 780           break;
 781         case OPTION_TBSS:
 782           set_section_start (".bss", optarg);
 783           break;
 784         case OPTION_TDATA:
 785           set_section_start (".data", optarg);
 786           break;
 787         case OPTION_TTEXT:
 788           set_section_start (".text", optarg);
 789           break;
 790         case OPTION_TRADITIONAL_FORMAT:
 791           link_info.traditional_format = true;
 792           break;
 793         case OPTION_TASK_LINK:
 794           link_info.task_link = true;
 795           /* Fall through - do an implied -r option.  */
 796         case OPTION_UR:
 797           link_info.relocateable = true;
 798           config.build_constructors = true;
 799           config.magic_demand_paged = false;
 800           config.text_read_only = false;
 801           config.dynamic_link = false;
 802           break;
 803         case 'u':
 804           ldlang_add_undef (optarg);
 805           break;
 806         case OPTION_VERBOSE:
 807           ldversion (1);
 808           version_printed = true;
 809           trace_file_tries = true;
 810           break;
 811         case 'v':
 812           ldversion (0);
 813           version_printed = true;
 814           break;
 815         case 'V':
 816           ldversion (1);
 817           version_printed = true;
 818           break;
 819         case OPTION_VERSION:
 820           /* This output is intended to follow the GNU standards document.  */
 821           printf ("GNU ld %s\n", ld_program_version);
 822           printf (_("Copyright 1997 Free Software Foundation, Inc.\n"));
 823           printf (_("\
 824 This program is free software; you may redistribute it under the terms of\n\
 825 the GNU General Public License.  This program has absolutely no warranty.\n"));
 826           {
 827             ld_emulation_xfer_type **ptr = ld_emulations;
 828
 829             printf (_("  Supported emulations:\n"));
 830             while (*ptr)
 831               {
 832                 printf ("   %s\n", (*ptr)->emulation_name);
 833                 ptr++;
 834               }
 835           }
 836           xexit (0);
 837           break;
 838         case OPTION_VERSION_SCRIPT:
 839           /* This option indicates a small script that only specifies
 840              version information.  Read it, but don't assume that
 841              we've seen a linker script.  */
 842           {
 843             boolean hold_had_script;
 844
 845             hold_had_script = had_script;
 846             ldfile_open_command_file (optarg);
 847             had_script = hold_had_script;
 848             parser_input = input_version_script;
 849             yyparse ();
 850           }
 851           break;
 852         case OPTION_VERSION_EXPORTS_SECTION:
 853           /* This option records a version symbol to be applied to the
 854              symbols listed for export to be found in the object files
 855              .exports sections.  */
 856           command_line.version_exports_section = optarg;
 857           break;
 858         case OPTION_WARN_COMMON:
 859           config.warn_common = true;
 860           break;
 861         case OPTION_WARN_CONSTRUCTORS:
 862           config.warn_constructors = true;
 863           break;
 864         case OPTION_WARN_MULTIPLE_GP:
 865           config.warn_multiple_gp = true;
 866           break;
 867         case OPTION_WARN_ONCE:
 868           config.warn_once = true;
 869           break;
 870         case OPTION_WARN_SECTION_ALIGN:
 871           config.warn_section_align = true;
 872           break;
 873         case OPTION_WHOLE_ARCHIVE:
 874           whole_archive = true;
 875           break;
 876         case OPTION_WRAP:
 877           add_wrap (optarg);
 878           break;
 879         case 'X':
 880           link_info.discard = discard_l;
 881           break;
 882         case 'x':
 883           link_info.discard = discard_all;
 884           break;
 885         case 'Y':
 886           if (strncmp (optarg, "P,", 2) == 0)
 887             optarg += 2;
 888           default_dirlist = xstrdup (optarg);
 889           break;
 890         case 'y':
 891           add_ysym (optarg);
 892           break;
 893         case 'z':
 894           /* We accept and ignore this option for Solaris
 895              compatibility.  Actually, on Solaris, optarg is not
 896              ignored.  Someday we should handle it correctly.  FIXME.  */
 897           break;
 898         case OPTION_SPLIT_BY_RELOC:
 899           config.split_by_reloc = atoi (optarg);
 900           break;
 901         case OPTION_SPLIT_BY_FILE:
 902           config.split_by_file = true;
 903           break;
 904         case OPTION_CHECK_SECTIONS:
 905           command_line.check_section_addresses = true;
 906           break;
 907         case OPTION_NO_CHECK_SECTIONS:
 908           command_line.check_section_addresses = false;
 909           break;
 910         case '(':
 911           if (ingroup)
 912             {
 913               fprintf (stderr,
 914                        _("%s: may not nest groups (--help for usage)\n"),
 915                        program_name);
 916               xexit (1);
 917             }
 918           lang_enter_group ();
 919           ingroup = 1;
 920           break;
 921         case ')':
 922           if (! ingroup)
 923             {
 924               fprintf (stderr,
 925                        _("%s: group ended before it began (--help for usage)\n"),
 926                        program_name);
 927               xexit (1);
 928             }
 929           lang_leave_group ();
 930           ingroup = 0;
 931           break;
 932
 933         }
 934     }
 935
 936   if (ingroup)
 937     lang_leave_group ();
 938
 939   if (default_dirlist != NULL)
 940     set_default_dirlist (default_dirlist);
 941
 942 }
 943
 944 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 945    library search path.  */
 946
 947 static void
 948 set_default_dirlist (dirlist_ptr)
 949      char *dirlist_ptr;
 950 {
 951   char *p;
 952
 953   while (1)
 954     {
 955       p = strchr (dirlist_ptr, PATH_SEPARATOR);
 956       if (p != NULL)
 957         *p = '\0';
 958       if (*dirlist_ptr != '\0')
 959         ldfile_add_library_path (dirlist_ptr, true);
 960       if (p == NULL)
 961         break;
 962       dirlist_ptr = p + 1;
 963     }
 964 }
 965
 966 static void
 967 set_section_start (sect, valstr)
 968      char *sect, *valstr;
 969 {
 970   char *end;
 971   unsigned long val = strtoul (valstr, &end, 16);
 972   if (*end)
 973     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
 974   lang_section_start (sect, exp_intop (val));
 975 }
 976 \f
 977 /* Print help messages for the options.  */
 978
 979 static void
 980 help ()
 981 {
 982   int i;
 983   const char **targets, **pp;
 984
 985   printf (_("Usage: %s [options] file...\n"), program_name);
 986
 987   printf (_("Options:\n"));
 988   for (i = 0; i < OPTION_COUNT; i++)
 989     {
 990       if (ld_options[i].doc != NULL)
 991         {
 992           boolean comma;
 993           int len;
 994           int j;
 995
 996           printf ("  ");
 997
 998           comma = false;
 999           len = 2;
1000
1001           j = i;
1002           do
1003             {
1004               if (ld_options[j].shortopt != '\0'
1005                   && ld_options[j].control != NO_HELP)
1006                 {
1007                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1008                   len += (comma ? 2 : 0) + 2;
1009                   if (ld_options[j].arg != NULL)
1010                     {
1011                       if (ld_options[j].opt.has_arg != optional_argument)
1012                         {
1013                           printf (" ");
1014                           ++len;
1015                         }
1016                       printf ("%s", _(ld_options[j].arg));
1017                       len += strlen (_(ld_options[j].arg));
1018                     }
1019                   comma = true;
1020                 }
1021               ++j;
1022             }
1023           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1024
1025           j = i;
1026           do
1027             {
1028               if (ld_options[j].opt.name != NULL
1029                   && ld_options[j].control != NO_HELP)
1030                 {
1031                   printf ("%s-%s%s",
1032                           comma ? ", " : "",
1033                           ld_options[j].control == TWO_DASHES ? "-" : "",
1034                           ld_options[j].opt.name);
1035                   len += ((comma ? 2 : 0)
1036                           + 1
1037                           + (ld_options[j].control == TWO_DASHES ? 1 : 0)
1038                           + strlen (ld_options[j].opt.name));
1039                   if (ld_options[j].arg != NULL)
1040                     {
1041                       printf (" %s", _(ld_options[j].arg));
1042                       len += 1 + strlen (_(ld_options[j].arg));
1043                     }
1044                   comma = true;
1045                 }
1046               ++j;
1047             }
1048           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1049
1050           if (len >= 30)
1051             {
1052               printf ("\n");
1053               len = 0;
1054             }
1055
1056           for (; len < 30; len++)
1057             putchar (' ');
1058
1059           printf ("%s\n", _(ld_options[i].doc));
1060         }
1061     }
1062
1063   /* xgettext:c-format */
1064   printf (_("%s: supported targets:"), program_name);
1065   targets = bfd_target_list ();
1066   for (pp = targets; *pp != NULL; pp++)
1067     printf (" %s", *pp);
1068   free (targets);
1069   printf ("\n");
1070
1071   /* xgettext:c-format */
1072   printf (_("%s: supported emulations: "), program_name);
1073   ldemul_list_emulations (stdout);
1074   printf ("\n");
1075
1076   /* xgettext:c-format */
1077   printf (_("%s: emulation specific options:\n"), program_name);
1078   ldemul_list_emulation_options (stdout);
1079   printf ("\n");
1080
1081   printf (_("\nReport bugs to bug-gnu-utils@gnu.org\n"));
1082 }