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