ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright (C) 1991, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
   3
   4 This file is part of GLD, the Gnu Linker.
   5
   6 GLD is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GLD is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GLD; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "bfd.h"
  21 #include "sysdep.h"
  22 #include "libiberty.h"
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <ctype.h>
  26 #include "getopt.h"
  27 #include "bfdlink.h"
  28 #include "ld.h"
  29 #include "ldmain.h"
  30 #include "ldmisc.h"
  31 #include "ldexp.h"
  32 #include "ldlang.h"
  33 #include "ldgram.h"
  34 #include "ldlex.h"
  35 #include "ldfile.h"
  36 #include "ldver.h"
  37 #include "ldemul.h"
  38
  39 /* Somewhere above, sys/stat.h got included . . . . */
  40 #if !defined(S_ISDIR) && defined(S_IFDIR)
  41 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  42 #endif
  43
  44 /* Omit args to avoid the possibility of clashing with a system header
  45    that might disagree about consts.  */
  46 unsigned long strtoul ();
  47
  48 static void set_default_dirlist PARAMS ((char *dirlist_ptr));
  49 static void set_section_start PARAMS ((char *sect, char *valstr));
  50 static void help PARAMS ((void));
  51
  52 /* Non-zero if we are processing a --defsym from the command line.  */
  53 int parsing_defsym = 0;
  54
  55 /* Codes used for the long options with no short synonyms.  150 isn't
  56    special; it's just an arbitrary non-ASCII char value.  */
  57
  58 #define OPTION_ASSERT                   150
  59 #define OPTION_CALL_SHARED              (OPTION_ASSERT + 1)
  60 #define OPTION_CREF                     (OPTION_CALL_SHARED + 1)
  61 #define OPTION_DEFSYM                   (OPTION_CREF + 1)
  62 #define OPTION_DYNAMIC_LINKER           (OPTION_DEFSYM + 1)
  63 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  64 #define OPTION_EL                       (OPTION_EB + 1)
  65 #define OPTION_EMBEDDED_RELOCS          (OPTION_EL + 1)
  66 #define OPTION_EXPORT_DYNAMIC           (OPTION_EMBEDDED_RELOCS + 1)
  67 #define OPTION_HELP                     (OPTION_EXPORT_DYNAMIC + 1)
  68 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  69 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  70 #define OPTION_NO_KEEP_MEMORY           (OPTION_MAP + 1)
  71 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_KEEP_MEMORY + 1)
  72 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  73 #define OPTION_NO_WHOLE_ARCHIVE         (OPTION_NON_SHARED + 1)
  74 #define OPTION_OFORMAT                  (OPTION_NO_WHOLE_ARCHIVE + 1)
  75 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  76 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  77 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  78 #define OPTION_RPATH_LINK               (OPTION_RPATH + 1)
  79 #define OPTION_SHARED                   (OPTION_RPATH_LINK + 1)
  80 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  81 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  82 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  83 #define OPTION_SYMBOLIC                 (OPTION_STATS + 1)
  84 #define OPTION_TBSS                     (OPTION_SYMBOLIC + 1)
  85 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  86 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  87 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
  88 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
  89 #define OPTION_VERBOSE                  (OPTION_UR + 1)
  90 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
  91 #define OPTION_WARN_COMMON              (OPTION_VERSION + 1)
  92 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
  93 #define OPTION_WARN_MULTIPLE_GP         (OPTION_WARN_CONSTRUCTORS + 1)
  94 #define OPTION_WARN_ONCE                (OPTION_WARN_MULTIPLE_GP + 1)
  95 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_ONCE + 1)
  96 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
  97 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
  98 #define OPTION_WRAP                     (OPTION_WHOLE_ARCHIVE + 1)
  99 #define OPTION_FORCE_EXE_SUFFIX         (OPTION_WRAP + 1)
 100
 101 /* The long options.  This structure is used for both the option
 102    parsing and the help text.  */
 103
 104 struct ld_option
 105 {
 106   /* The long option information.  */
 107   struct option opt;
 108   /* The short option with the same meaning ('\0' if none).  */
 109   char shortopt;
 110   /* The name of the argument (NULL if none).  */
 111   const char *arg;
 112   /* The documentation string.  If this is NULL, this is a synonym for
 113      the previous option.  */
 114   const char *doc;
 115   enum
 116     {
 117       /* Use one dash before long option name.  */
 118       ONE_DASH,
 119       /* Use two dashes before long option name.  */
 120       TWO_DASHES,
 121       /* Don't mention this option in --help output.  */
 122       NO_HELP
 123     } control;
 124 };
 125
 126 static const struct ld_option ld_options[] =
 127 {
 128   { {NULL, required_argument, NULL, '\0'},
 129       'a', "KEYWORD", "Shared library control for HP/UX compatibility",
 130       ONE_DASH },
 131   { {"architecture", required_argument, NULL, 'A'},
 132       'A', "ARCH", "Set architecture" , TWO_DASHES },
 133   { {"format", required_argument, NULL, 'b'},
 134       'b', "TARGET", "Specify target for following input files", TWO_DASHES },
 135   { {"mri-script", required_argument, NULL, 'c'},
 136       'c', "FILE", "Read MRI format linker script", TWO_DASHES },
 137   { {"dc", no_argument, NULL, 'd'},
 138       'd', NULL, "Force common symbols to be defined", ONE_DASH },
 139   { {"dp", no_argument, NULL, 'd'},
 140       '\0', NULL, NULL, ONE_DASH },
 141   { {"entry", required_argument, NULL, 'e'},
 142       'e', "ADDRESS", "Set start address", TWO_DASHES },
 143   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 144       'E', NULL, "Export all dynamic symbols", TWO_DASHES },
 145   { {NULL, optional_argument, NULL, '\0'},
 146       'F', "[FORMAT]", "Ignored", ONE_DASH },
 147   { {NULL, no_argument, NULL, '\0'},
 148       'g', NULL, "Ignored", ONE_DASH },
 149   { {"gpsize", required_argument, NULL, 'G'},
 150       'G', "SIZE", "Small data size (if no size, same as --shared)",
 151       TWO_DASHES },
 152   { {"soname", required_argument, NULL, OPTION_SONAME},
 153       'h', "FILENAME", "Set internal name of shared library", ONE_DASH },
 154   { {"library", required_argument, NULL, 'l'},
 155       'l', "LIBNAME", "Search for library LIBNAME", TWO_DASHES },
 156   { {"library-path", required_argument, NULL, 'L'},
 157       'L', "DIRECTORY", "Add DIRECTORY to library search path", TWO_DASHES },
 158   { {NULL, required_argument, NULL, '\0'},
 159       'm', "EMULATION", "Set emulation", ONE_DASH },
 160   { {"print-map", no_argument, NULL, 'M'},
 161       'M', NULL, "Print map file on standard output", TWO_DASHES },
 162   { {"nmagic", no_argument, NULL, 'n'},
 163       'n', NULL, "Do not page align data", TWO_DASHES },
 164   { {"omagic", no_argument, NULL, 'N'},
 165       'N', NULL, "Do not page align data, do not make text readonly",
 166       TWO_DASHES },
 167   { {"output", required_argument, NULL, 'o'},
 168       'o', "FILE", "Set output file name", TWO_DASHES },
 169   { {NULL, required_argument, NULL, '\0'},
 170       'O', NULL, "Ignored", ONE_DASH },
 171   { {"relocateable", no_argument, NULL, 'r'},
 172       'r', NULL, "Generate relocateable output", TWO_DASHES },
 173   { {NULL, no_argument, NULL, '\0'},
 174       'i', NULL, NULL, ONE_DASH },
 175   { {"just-symbols", required_argument, NULL, 'R'},
 176       'R', "FILE", "Just link symbols (if directory, same as --rpath)",
 177       TWO_DASHES },
 178   { {"strip-all", no_argument, NULL, 's'},
 179       's', NULL, "Strip all symbols", TWO_DASHES },
 180   { {"strip-debug", no_argument, NULL, 'S'},
 181       'S', NULL, "Strip debugging symbols", TWO_DASHES },
 182   { {"trace", no_argument, NULL, 't'},
 183       't', NULL, "Trace file opens", TWO_DASHES },
 184   { {"script", required_argument, NULL, 'T'},
 185       'T', "FILE", "Read linker script", TWO_DASHES },
 186   { {"undefined", required_argument, NULL, 'u'},
 187       'u', "SYMBOL", "Start with undefined reference to SYMBOL", TWO_DASHES },
 188   { {"version", no_argument, NULL, OPTION_VERSION},
 189       'v', NULL, "Print version information", TWO_DASHES },
 190   { {NULL, no_argument, NULL, '\0'},
 191       'V', NULL, "Print version and emulation information", ONE_DASH },
 192   { {"discard-all", no_argument, NULL, 'x'},
 193       'x', NULL, "Discard all local symbols", TWO_DASHES },
 194   { {"discard-locals", no_argument, NULL, 'X'},
 195       'X', NULL, "Discard temporary local symbols", TWO_DASHES },
 196   { {"trace-symbol", required_argument, NULL, 'y'},
 197       'y', "SYMBOL", "Trace mentions of SYMBOL", TWO_DASHES },
 198   { {NULL, required_argument, NULL, '\0'},
 199       'Y', "PATH", "Default search path for Solaris compatibility", ONE_DASH },
 200   { {NULL, required_argument, NULL, '\0'},
 201       'z', "KEYWORD", "Ignored for Solaris compatibility", ONE_DASH },
 202   { {"start-group", no_argument, NULL, '('},
 203       '(', NULL, "Start a group", TWO_DASHES },
 204   { {"end-group", no_argument, NULL, ')'},
 205       ')', NULL, "End a group", TWO_DASHES },
 206   { {"assert", required_argument, NULL, OPTION_ASSERT},
 207       '\0', "KEYWORD", "Ignored for SunOS compatibility", ONE_DASH },
 208   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 209       '\0', NULL, "Link against shared libraries", ONE_DASH },
 210   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 211       '\0', NULL, NULL, ONE_DASH },
 212   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 213       '\0', NULL, NULL, ONE_DASH },
 214   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 215       '\0', NULL, "Do not link against shared libraries", ONE_DASH },
 216   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 217       '\0', NULL, NULL, ONE_DASH },
 218   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 219       '\0', NULL, NULL, ONE_DASH },
 220   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 221       '\0', NULL, NULL, ONE_DASH },
 222   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 223       '\0', NULL, "Bind global references locally", ONE_DASH },
 224   { {"cref", no_argument, NULL, OPTION_CREF},
 225       '\0', NULL, "Output cross reference table", TWO_DASHES },
 226   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 227       '\0', "SYMBOL=EXPRESSION", "Define a symbol", TWO_DASHES },
 228   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 229       '\0', "PROGRAM", "Set the dynamic linker to use", TWO_DASHES },
 230   { {"EB", no_argument, NULL, OPTION_EB},
 231       '\0', NULL, "Link big-endian objects", ONE_DASH },
 232   { {"EL", no_argument, NULL, OPTION_EL},
 233       '\0', NULL, "Link little-endian objects", ONE_DASH },
 234   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 235       '\0', NULL, "Generate embedded relocs", TWO_DASHES},
 236   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 237       '\0', NULL, "Force generation of file with .exe suffix", TWO_DASHES},
 238   { {"help", no_argument, NULL, OPTION_HELP},
 239       '\0', NULL, "Print option help", TWO_DASHES },
 240   { {"Map", required_argument, NULL, OPTION_MAP},
 241       '\0', "FILE", "Write a map file", ONE_DASH },
 242   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 243       '\0', NULL, "Use less memory and more disk I/O", TWO_DASHES },
 244   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 245       '\0', NULL, "Turn off --whole-archive", TWO_DASHES },
 246   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 247       '\0', NULL, "Create an output file even if errors occur", TWO_DASHES },
 248   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 249       '\0', NULL, NULL, NO_HELP },
 250   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 251       '\0', "TARGET", "Specify target of output file", TWO_DASHES },
 252   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 253       '\0', NULL, "Ignored for Linux compatibility", ONE_DASH },
 254   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 255       '\0', NULL, "Ignored for SVR4 compatibility", ONE_DASH },
 256   { {"relax", no_argument, NULL, OPTION_RELAX},
 257       '\0', NULL, "Relax branches on certain targets", TWO_DASHES },
 258   { {"retain-symbols-file", required_argument, NULL,
 259        OPTION_RETAIN_SYMBOLS_FILE},
 260       '\0', "FILE", "Keep only symbols listed in FILE", TWO_DASHES },
 261   { {"rpath", required_argument, NULL, OPTION_RPATH},
 262       '\0', "PATH", "Set runtime shared library search path", ONE_DASH },
 263   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 264       '\0', "PATH", "Set link time shared library search path", ONE_DASH },
 265   { {"shared", no_argument, NULL, OPTION_SHARED},
 266       '\0', NULL, "Create a shared library", ONE_DASH },
 267   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 268       '\0', NULL, NULL, ONE_DASH },
 269   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 270       '\0', NULL, "Sort common symbols by size", TWO_DASHES },
 271   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 272       '\0', NULL, NULL, NO_HELP },
 273   { {"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
 274       '\0', NULL, "Split output sections for each file", TWO_DASHES },
 275   { {"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
 276       '\0', "COUNT", "Split output sections every COUNT relocs", TWO_DASHES },
 277   { {"stats", no_argument, NULL, OPTION_STATS},
 278       '\0', NULL, "Print memory usage statistics", TWO_DASHES },
 279   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 280       '\0', NULL, "Use same format as native linker", TWO_DASHES },
 281   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 282       '\0', "ADDRESS", "Set address of .bss section", ONE_DASH },
 283   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 284       '\0', "ADDRESS", "Set address of .data section", ONE_DASH },
 285   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 286       '\0', "ADDRESS", "Set address of .text section", ONE_DASH },
 287   { {"Ur", no_argument, NULL, OPTION_UR},
 288       '\0', NULL, "Build global constructor/destructor tables", ONE_DASH },
 289   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 290       '\0', NULL, "Output lots of information during link", TWO_DASHES },
 291   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 292       '\0', NULL, NULL, NO_HELP },
 293   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 294       '\0', NULL, "Warn about duplicate common symbols", TWO_DASHES },
 295   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 296       '\0', NULL, "Warn if global constructors/destructors are seen",
 297       TWO_DASHES },
 298   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 299       '\0', NULL, "Warn if the multiple GP values are used", TWO_DASHES },
 300   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 301       '\0', NULL, "Warn only once per undefined symbol", TWO_DASHES },
 302   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 303       '\0', NULL, "Include all objects from following archives", TWO_DASHES },
 304   { {"wrap", required_argument, NULL, OPTION_WRAP},
 305       '\0', "SYMBOL", "Use wrapper functions for SYMBOL", TWO_DASHES }
 306 };
 307
 308 #define OPTION_COUNT (sizeof ld_options / sizeof ld_options[0])
 309
 310 void
 311 parse_args (argc, argv)
 312      int argc;
 313      char **argv;
 314 {
 315   int i, is, il;
 316   int ingroup = 0;
 317   char *default_dirlist = NULL;
 318   char shortopts[OPTION_COUNT * 3 + 2];
 319   struct option longopts[OPTION_COUNT + 1];
 320
 321   /* Starting the short option string with '-' is for programs that
 322      expect options and other ARGV-elements in any order and that care about
 323      the ordering of the two.  We describe each non-option ARGV-element
 324      as if it were the argument of an option with character code 1.  */
 325   shortopts[0] = '-';
 326   is = 1;
 327   il = 0;
 328   for (i = 0; i < OPTION_COUNT; i++)
 329     {
 330       if (ld_options[i].shortopt != '\0')
 331         {
 332           shortopts[is] = ld_options[i].shortopt;
 333           ++is;
 334           if (ld_options[i].opt.has_arg == required_argument
 335               || ld_options[i].opt.has_arg == optional_argument)
 336             {
 337               shortopts[is] = ':';
 338               ++is;
 339               if (ld_options[i].opt.has_arg == optional_argument)
 340                 {
 341                   shortopts[is] = ':';
 342                   ++is;
 343                 }
 344             }
 345         }
 346       if (ld_options[i].opt.name != NULL)
 347         {
 348           longopts[il] = ld_options[i].opt;
 349           ++il;
 350         }
 351     }
 352   shortopts[is] = '\0';
 353   longopts[il].name = NULL;
 354
 355   /* The -G option is ambiguous on different platforms.  Sometimes it
 356      specifies the largest data size to put into the small data
 357      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 358      the first form takes an argument, while the second does not.
 359
 360      We need to permit the --shared form because on some platforms,
 361      such as Solaris, gcc -shared will pass -G to the linker.
 362
 363      To permit either usage, we look through the argument list.  If we
 364      find -G not followed by a number, we change it into --shared.
 365      This will work for most normal cases.  */
 366   for (i = 1; i < argc; i++)
 367     if (strcmp (argv[i], "-G") == 0
 368         && (i + 1 >= argc
 369             || ! isdigit (argv[i + 1][0])))
 370       argv[i] = (char *) "--shared";
 371
 372   while (1)
 373     {
 374       /* getopt_long_only is like getopt_long, but '-' as well as '--' can
 375          indicate a long option.  */
 376       int longind;
 377       int optc;
 378
 379       if (ldemul_parse_args (argc, argv))
 380         continue;
 381
 382       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 383
 384       if (optc == -1)
 385         break;
 386       switch (optc)
 387         {
 388         default:
 389           xexit (1);
 390         case 1:                 /* File name.  */
 391           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 392                                (char *) NULL);
 393           break;
 394
 395         case OPTION_IGNORE:
 396           break;
 397         case 'a':
 398           /* For HP/UX compatibility.  Actually -a shared should mean
 399              ``use only shared libraries'' but, then, we don't
 400              currently support shared libraries on HP/UX anyhow.  */
 401           if (strcmp (optarg, "archive") == 0)
 402             config.dynamic_link = false;
 403           else if (strcmp (optarg, "shared") == 0
 404                    || strcmp (optarg, "default") == 0)
 405             config.dynamic_link = true;
 406           else
 407             einfo ("%P%F: unrecognized -a option `%s'\n", optarg);
 408           break;
 409         case OPTION_ASSERT:
 410           /* FIXME: We just ignore these, but we should handle them.  */
 411           if (strcmp (optarg, "definitions") == 0)
 412             ;
 413           else if (strcmp (optarg, "nodefinitions") == 0)
 414             ;
 415           else if (strcmp (optarg, "nosymbolic") == 0)
 416             ;
 417           else if (strcmp (optarg, "pure-text") == 0)
 418             ;
 419           else
 420             einfo ("%P%F: unrecognized -assert option `%s'\n", optarg);
 421           break;
 422         case 'A':
 423           ldfile_add_arch (optarg);
 424           break;
 425         case 'b':
 426           lang_add_target (optarg);
 427           break;
 428         case 'c':
 429           ldfile_open_command_file (optarg);
 430           parser_input = input_mri_script;
 431           yyparse ();
 432           break;
 433         case OPTION_CALL_SHARED:
 434           config.dynamic_link = true;
 435           break;
 436         case OPTION_NON_SHARED:
 437           config.dynamic_link = false;
 438           break;
 439         case OPTION_CREF:
 440           command_line.cref = true;
 441           link_info.notice_all = true;
 442           break;
 443         case 'd':
 444           command_line.force_common_definition = true;
 445           break;
 446         case OPTION_DEFSYM:
 447           lex_string = optarg;
 448           lex_redirect (optarg);
 449           parser_input = input_defsym;
 450           parsing_defsym = 1;
 451           yyparse ();
 452           parsing_defsym = 0;
 453           lex_string = NULL;
 454           break;
 455         case OPTION_DYNAMIC_LINKER:
 456           command_line.interpreter = optarg;
 457           break;
 458         case OPTION_EB:
 459           command_line.endian = ENDIAN_BIG;
 460           break;
 461         case OPTION_EL:
 462           command_line.endian = ENDIAN_LITTLE;
 463           break;
 464         case OPTION_EMBEDDED_RELOCS:
 465           command_line.embedded_relocs = true;
 466           break;
 467         case OPTION_EXPORT_DYNAMIC:
 468         case 'E': /* HP/UX compatibility.  */
 469           command_line.export_dynamic = true;
 470           break;
 471         case 'e':
 472           lang_add_entry (optarg, true);
 473           break;
 474         case 'F':
 475           /* Ignore.  */
 476           break;
 477         case OPTION_FORCE_EXE_SUFFIX:
 478           command_line.force_exe_suffix = true;
 479           break;
 480         case 'G':
 481           {
 482             char *end;
 483             g_switch_value = strtoul (optarg, &end, 0);
 484             if (*end)
 485               einfo ("%P%F: invalid number `%s'\n", optarg);
 486           }
 487           break;
 488         case 'g':
 489           /* Ignore.  */
 490           break;
 491         case OPTION_HELP:
 492           help ();
 493           xexit (0);
 494           break;
 495         case 'L':
 496           ldfile_add_library_path (optarg, true);
 497           break;
 498         case 'l':
 499           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 500                                (char *) NULL);
 501           break;
 502         case 'M':
 503           config.map_filename = "-";
 504           break;
 505         case 'm':
 506           /* Ignore.  Was handled in a pre-parse.   */
 507           break;
 508         case OPTION_MAP:
 509           config.map_filename = optarg;
 510           break;
 511         case 'N':
 512           config.text_read_only = false;
 513           config.magic_demand_paged = false;
 514           config.dynamic_link = false;
 515           break;
 516         case 'n':
 517           config.magic_demand_paged = false;
 518           config.dynamic_link = false;
 519           break;
 520         case OPTION_NO_KEEP_MEMORY:
 521           link_info.keep_memory = false;
 522           break;
 523         case OPTION_NOINHIBIT_EXEC:
 524           force_make_executable = true;
 525           break;
 526         case OPTION_NO_WHOLE_ARCHIVE:
 527           whole_archive = false;
 528           break;
 529         case 'O':
 530           /* FIXME "-O<non-digits> <value>" used to set the address of
 531              section <non-digits>.  Was this for compatibility with
 532              something, or can we create a new option to do that
 533              (with a syntax similar to -defsym)?
 534              getopt can't handle two args to an option without kludges.  */
 535           break;
 536         case 'o':
 537           lang_add_output (optarg, 0);
 538           break;
 539         case OPTION_OFORMAT:
 540           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 541           break;
 542         case 'i':
 543         case 'r':
 544           link_info.relocateable = true;
 545           config.build_constructors = false;
 546           config.magic_demand_paged = false;
 547           config.text_read_only = false;
 548           config.dynamic_link = false;
 549           break;
 550         case 'R':
 551           /* The GNU linker traditionally uses -R to mean to include
 552              only the symbols from a file.  The Solaris linker uses -R
 553              to set the path used by the runtime linker to find
 554              libraries.  This is the GNU linker -rpath argument.  We
 555              try to support both simultaneously by checking the file
 556              named.  If it is a directory, rather than a regular file,
 557              we assume -rpath was meant.  */
 558           {
 559             struct stat s;
 560
 561             if (stat (optarg, &s) >= 0
 562                 && ! S_ISDIR (s.st_mode))
 563               {
 564                 lang_add_input_file (optarg,
 565                                      lang_input_file_is_symbols_only_enum,
 566                                      (char *) NULL);
 567                 break;
 568               }
 569           }
 570           /* Fall through.  */
 571         case OPTION_RPATH:
 572           if (command_line.rpath == NULL)
 573             command_line.rpath = buystring (optarg);
 574           else
 575             {
 576               char *buf;
 577
 578               buf = xmalloc (strlen (command_line.rpath)
 579                              + strlen (optarg)
 580                              + 2);
 581               sprintf (buf, "%s:%s", command_line.rpath, optarg);
 582               free (command_line.rpath);
 583               command_line.rpath = buf;
 584             }
 585           break;
 586         case OPTION_RPATH_LINK:
 587           if (command_line.rpath_link == NULL)
 588             command_line.rpath_link = buystring (optarg);
 589           else
 590             {
 591               char *buf;
 592
 593               buf = xmalloc (strlen (command_line.rpath_link)
 594                              + strlen (optarg)
 595                              + 2);
 596               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 597               free (command_line.rpath_link);
 598               command_line.rpath_link = buf;
 599             }
 600           break;
 601         case OPTION_RELAX:
 602           command_line.relax = true;
 603           break;
 604         case OPTION_RETAIN_SYMBOLS_FILE:
 605           add_keepsyms_file (optarg);
 606           break;
 607         case 'S':
 608           link_info.strip = strip_debugger;
 609           break;
 610         case 's':
 611           link_info.strip = strip_all;
 612           break;
 613         case OPTION_SHARED:
 614           link_info.shared = true;
 615           break;
 616         case 'h':               /* Used on Solaris.  */
 617         case OPTION_SONAME:
 618           command_line.soname = optarg;
 619           break;
 620         case OPTION_SORT_COMMON:
 621           config.sort_common = true;
 622           break;
 623         case OPTION_STATS:
 624           config.stats = true;
 625           break;
 626         case OPTION_SYMBOLIC:
 627           link_info.symbolic = true;
 628           break;
 629         case 't':
 630           trace_files = true;
 631           break;
 632         case 'T':
 633           ldfile_open_command_file (optarg);
 634           parser_input = input_script;
 635           yyparse ();
 636           break;
 637         case OPTION_TBSS:
 638           set_section_start (".bss", optarg);
 639           break;
 640         case OPTION_TDATA:
 641           set_section_start (".data", optarg);
 642           break;
 643         case OPTION_TTEXT:
 644           set_section_start (".text", optarg);
 645           break;
 646         case OPTION_TRADITIONAL_FORMAT:
 647           link_info.traditional_format = true;
 648           break;
 649         case OPTION_UR:
 650           link_info.relocateable = true;
 651           config.build_constructors = true;
 652           config.magic_demand_paged = false;
 653           config.text_read_only = false;
 654           config.dynamic_link = false;
 655           break;
 656         case 'u':
 657           ldlang_add_undef (optarg);
 658           break;
 659         case OPTION_VERBOSE:
 660           ldversion (1);
 661           version_printed = true;
 662           trace_file_tries = true;
 663           break;
 664         case 'v':
 665           ldversion (0);
 666           version_printed = true;
 667           break;
 668         case 'V':
 669           ldversion (1);
 670           version_printed = true;
 671           break;
 672         case OPTION_VERSION:
 673           /* This output is intended to follow the GNU standards document.  */
 674           printf ("GNU ld %s\n", ld_program_version);
 675           printf ("Copyright 1996 Free Software Foundation, Inc.\n");
 676           printf ("\
 677 This program is free software; you may redistribute it under the terms of\n\
 678 the GNU General Public License.  This program has absolutely no warranty.\n");
 679           {
 680             ld_emulation_xfer_type **ptr = ld_emulations;
 681
 682             printf ("  Supported emulations:\n");
 683             while (*ptr)
 684               {
 685                 printf ("   %s\n", (*ptr)->emulation_name);
 686                 ptr++;
 687               }
 688           }
 689           xexit (0);
 690           break;
 691         case OPTION_WARN_COMMON:
 692           config.warn_common = true;
 693           break;
 694         case OPTION_WARN_CONSTRUCTORS:
 695           config.warn_constructors = true;
 696           break;
 697         case OPTION_WARN_MULTIPLE_GP:
 698           config.warn_multiple_gp = true;
 699           break;
 700         case OPTION_WARN_ONCE:
 701           config.warn_once = true;
 702           break;
 703         case OPTION_WHOLE_ARCHIVE:
 704           whole_archive = true;
 705           break;
 706         case OPTION_WRAP:
 707           add_wrap (optarg);
 708           break;
 709         case 'X':
 710           link_info.discard = discard_l;
 711           break;
 712         case 'x':
 713           link_info.discard = discard_all;
 714           break;
 715         case 'Y':
 716           if (strncmp (optarg, "P,", 2) == 0)
 717             optarg += 2;
 718           default_dirlist = xstrdup (optarg);
 719           break;
 720         case 'y':
 721           add_ysym (optarg);
 722           break;
 723         case 'z':
 724           /* We accept and ignore this option for Solaris
 725              compatibility.  Actually, on Solaris, optarg is not
 726              ignored.  Someday we should handle it correctly.  FIXME.  */
 727           break;
 728         case OPTION_SPLIT_BY_RELOC:
 729           config.split_by_reloc = atoi (optarg);
 730           break;
 731         case OPTION_SPLIT_BY_FILE:
 732           config.split_by_file = true;
 733           break;
 734         case '(':
 735           if (ingroup)
 736             {
 737               fprintf (stderr,
 738                        "%s: may not nest groups (--help for usage)\n",
 739                        program_name);
 740               xexit (1);
 741             }
 742           lang_enter_group ();
 743           ingroup = 1;
 744           break;
 745         case ')':
 746           if (! ingroup)
 747             {
 748               fprintf (stderr,
 749                        "%s: group ended before it began (--help for usage)\n",
 750                        program_name);
 751               xexit (1);
 752             }
 753           lang_leave_group ();
 754           ingroup = 0;
 755           break;
 756
 757         }
 758     }
 759
 760   if (ingroup)
 761     lang_leave_group ();
 762
 763   if (default_dirlist != NULL)
 764     set_default_dirlist (default_dirlist);
 765
 766 }
 767
 768 /* Add the (colon-separated) elements of DIRLIST_PTR to the
 769    library search path.  */
 770
 771 static void
 772 set_default_dirlist (dirlist_ptr)
 773      char *dirlist_ptr;
 774 {
 775   char *p;
 776
 777   while (1)
 778     {
 779       p = strchr (dirlist_ptr, ':');
 780       if (p != NULL)
 781         *p = '\0';
 782       if (*dirlist_ptr != '\0')
 783         ldfile_add_library_path (dirlist_ptr, true);
 784       if (p == NULL)
 785         break;
 786       dirlist_ptr = p + 1;
 787     }
 788 }
 789
 790 static void
 791 set_section_start (sect, valstr)
 792      char *sect, *valstr;
 793 {
 794   char *end;
 795   unsigned long val = strtoul (valstr, &end, 16);
 796   if (*end)
 797     einfo ("%P%F: invalid hex number `%s'\n", valstr);
 798   lang_section_start (sect, exp_intop (val));
 799 }
 800 \f
 801 /* Print help messages for the options.  */
 802
 803 static void
 804 help ()
 805 {
 806   int i;
 807   const char **targets, **pp;
 808
 809   printf ("Usage: %s [options] file...\n", program_name);
 810
 811   printf ("Options:\n");
 812   for (i = 0; i < OPTION_COUNT; i++)
 813     {
 814       if (ld_options[i].doc != NULL)
 815         {
 816           boolean comma;
 817           int len;
 818           int j;
 819
 820           printf ("  ");
 821
 822           comma = false;
 823           len = 2;
 824
 825           j = i;
 826           do
 827             {
 828               if (ld_options[j].shortopt != '\0'
 829                   && ld_options[j].control != NO_HELP)
 830                 {
 831                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
 832                   len += (comma ? 2 : 0) + 2;
 833                   if (ld_options[j].arg != NULL)
 834                     {
 835                       if (ld_options[j].opt.has_arg != optional_argument)
 836                         {
 837                           printf (" ");
 838                           ++len;
 839                         }
 840                       printf ("%s", ld_options[j].arg);
 841                       len += strlen (ld_options[j].arg);
 842                     }
 843                   comma = true;
 844                 }
 845               ++j;
 846             }
 847           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
 848
 849           j = i;
 850           do
 851             {
 852               if (ld_options[j].opt.name != NULL
 853                   && ld_options[j].control != NO_HELP)
 854                 {
 855                   printf ("%s-%s%s",
 856                           comma ? ", " : "",
 857                           ld_options[j].control == TWO_DASHES ? "-" : "",
 858                           ld_options[j].opt.name);
 859                   len += ((comma ? 2 : 0)
 860                           + 1
 861                           + (ld_options[j].control == TWO_DASHES ? 1 : 0)
 862                           + strlen (ld_options[j].opt.name));
 863                   if (ld_options[j].arg != NULL)
 864                     {
 865                       printf (" %s", ld_options[j].arg);
 866                       len += 1 + strlen (ld_options[j].arg);
 867                     }
 868                   comma = true;
 869                 }
 870               ++j;
 871             }
 872           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
 873
 874           if (len >= 30)
 875             {
 876               printf ("\n");
 877               len = 0;
 878             }
 879
 880           for (; len < 30; len++)
 881             putchar (' ');
 882
 883           printf ("%s\n", ld_options[i].doc);
 884         }
 885     }
 886
 887   printf ("%s: supported targets:", program_name);
 888   targets = bfd_target_list ();
 889   for (pp = targets; *pp != NULL; pp++)
 890     printf (" %s", *pp);
 891   free (targets);
 892   printf ("\n");
 893
 894   printf ("%s: supported emulations: ", program_name);
 895   ldemul_list_emulations (stdout);
 896   printf ("\n");
 897   printf ("\nReport bugs to bug-gnu-utils@prep.ai.mit.edu\n");
 898 }