ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libiberty.h"
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "safe-ctype.h"
  29 #include "getopt.h"
  30 #include "bfdlink.h"
  31 #include "ld.h"
  32 #include "ldmain.h"
  33 #include "ldmisc.h"
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include <ldgram.h>
  37 #include "ldlex.h"
  38 #include "ldfile.h"
  39 #include "ldver.h"
  40 #include "ldemul.h"
  41 #include "demangle.h"
  42
  43 #ifndef PATH_SEPARATOR
  44 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  45 #define PATH_SEPARATOR ';'
  46 #else
  47 #define PATH_SEPARATOR ':'
  48 #endif
  49 #endif
  50
  51 /* Somewhere above, sys/stat.h got included . . . .  */
  52 #if !defined(S_ISDIR) && defined(S_IFDIR)
  53 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  54 #endif
  55
  56 static int is_num PARAMS ((const char *, int, int, int));
  57 static void set_default_dirlist PARAMS ((char *));
  58 static void set_section_start PARAMS ((char *, char *));
  59 static void help PARAMS ((void));
  60
  61 /* Non-zero if we are processing a --defsym from the command line.  */
  62 int parsing_defsym = 0;
  63
  64 /* Codes used for the long options with no short synonyms.  150 isn't
  65    special; it's just an arbitrary non-ASCII char value.  */
  66
  67 #define OPTION_ASSERT                   150
  68 #define OPTION_CALL_SHARED              (OPTION_ASSERT + 1)
  69 #define OPTION_CREF                     (OPTION_CALL_SHARED + 1)
  70 #define OPTION_DEFSYM                   (OPTION_CREF + 1)
  71 #define OPTION_DEMANGLE                 (OPTION_DEFSYM + 1)
  72 #define OPTION_DYNAMIC_LINKER           (OPTION_DEMANGLE + 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_DEMANGLE              (OPTION_MAP + 1)
  81 #define OPTION_NO_KEEP_MEMORY           (OPTION_NO_DEMANGLE + 1)
  82 #define OPTION_NO_WARN_MISMATCH         (OPTION_NO_KEEP_MEMORY + 1)
  83 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_WARN_MISMATCH + 1)
  84 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  85 #define OPTION_NO_WHOLE_ARCHIVE         (OPTION_NON_SHARED + 1)
  86 #define OPTION_OFORMAT                  (OPTION_NO_WHOLE_ARCHIVE + 1)
  87 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  88 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  89 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  90 #define OPTION_RPATH_LINK               (OPTION_RPATH + 1)
  91 #define OPTION_SHARED                   (OPTION_RPATH_LINK + 1)
  92 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  93 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  94 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  95 #define OPTION_SYMBOLIC                 (OPTION_STATS + 1)
  96 #define OPTION_TASK_LINK                (OPTION_SYMBOLIC + 1)
  97 #define OPTION_TBSS                     (OPTION_TASK_LINK + 1)
  98 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  99 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
 100 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
 101 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
 102 #define OPTION_VERBOSE                  (OPTION_UR + 1)
 103 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
 104 #define OPTION_VERSION_SCRIPT           (OPTION_VERSION + 1)
 105 #define OPTION_VERSION_EXPORTS_SECTION  (OPTION_VERSION_SCRIPT + 1)
 106 #define OPTION_WARN_COMMON              (OPTION_VERSION_EXPORTS_SECTION + 1)
 107 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
 108 #define OPTION_WARN_FATAL               (OPTION_WARN_CONSTRUCTORS + 1)
 109 #define OPTION_WARN_MULTIPLE_GP         (OPTION_WARN_FATAL + 1)
 110 #define OPTION_WARN_ONCE                (OPTION_WARN_MULTIPLE_GP + 1)
 111 #define OPTION_WARN_SECTION_ALIGN       (OPTION_WARN_ONCE + 1)
 112 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_SECTION_ALIGN + 1)
 113 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 114 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 115 #define OPTION_WRAP                     (OPTION_WHOLE_ARCHIVE + 1)
 116 #define OPTION_FORCE_EXE_SUFFIX         (OPTION_WRAP + 1)
 117 #define OPTION_GC_SECTIONS              (OPTION_FORCE_EXE_SUFFIX + 1)
 118 #define OPTION_NO_GC_SECTIONS           (OPTION_GC_SECTIONS + 1)
 119 #define OPTION_CHECK_SECTIONS           (OPTION_NO_GC_SECTIONS + 1)
 120 #define OPTION_NO_CHECK_SECTIONS        (OPTION_CHECK_SECTIONS + 1)
 121 #define OPTION_MPC860C0                 (OPTION_NO_CHECK_SECTIONS + 1)
 122 #define OPTION_NO_UNDEFINED             (OPTION_MPC860C0 + 1)
 123 #define OPTION_INIT                     (OPTION_NO_UNDEFINED + 1)
 124 #define OPTION_FINI                     (OPTION_INIT + 1)
 125 #define OPTION_SECTION_START            (OPTION_FINI + 1)
 126 #define OPTION_UNIQUE                   (OPTION_SECTION_START + 1)
 127 #define OPTION_TARGET_HELP              (OPTION_UNIQUE + 1)
 128 #define OPTION_ALLOW_SHLIB_UNDEFINED    (OPTION_TARGET_HELP + 1)
 129 #define OPTION_NO_ALLOW_SHLIB_UNDEFINED (OPTION_ALLOW_SHLIB_UNDEFINED + 1)
 130 #define OPTION_ALLOW_MULTIPLE_DEFINITION (OPTION_NO_ALLOW_SHLIB_UNDEFINED + 1)
 131 #define OPTION_NO_UNDEFINED_VERSION     (OPTION_ALLOW_MULTIPLE_DEFINITION + 1)
 132 #define OPTION_DISCARD_NONE             (OPTION_NO_UNDEFINED_VERSION + 1)
 133 #define OPTION_SPARE_DYNAMIC_TAGS       (OPTION_DISCARD_NONE + 1)
 134 #define OPTION_NO_DEFINE_COMMON         (OPTION_SPARE_DYNAMIC_TAGS + 1)
 135 #define OPTION_NOSTDLIB                 (OPTION_NO_DEFINE_COMMON + 1)
 136 #define OPTION_NO_OMAGIC                (OPTION_NOSTDLIB + 1)
 137 #define OPTION_STRIP_DISCARDED          (OPTION_NO_OMAGIC + 1)
 138 #define OPTION_NO_STRIP_DISCARDED       (OPTION_STRIP_DISCARDED + 1)
 139 #define OPTION_ACCEPT_UNKNOWN_INPUT_ARCH    (OPTION_NO_STRIP_DISCARDED + 1)
 140 #define OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH (OPTION_ACCEPT_UNKNOWN_INPUT_ARCH + 1)
 141
 142 /* The long options.  This structure is used for both the option
 143    parsing and the help text.  */
 144
 145 struct ld_option
 146 {
 147   /* The long option information.  */
 148   struct option opt;
 149   /* The short option with the same meaning ('\0' if none).  */
 150   char shortopt;
 151   /* The name of the argument (NULL if none).  */
 152   const char *arg;
 153   /* The documentation string.  If this is NULL, this is a synonym for
 154      the previous option.  */
 155   const char *doc;
 156   enum {
 157     /* Use one dash before long option name.  */
 158     ONE_DASH,
 159     /* Use two dashes before long option name.  */
 160     TWO_DASHES,
 161     /* Only accept two dashes before the long option name.
 162        This is an overloading of the use of this enum, since originally it
 163        was only intended to tell the --help display function how to display
 164        the long option name.  This feature was added in order to resolve
 165        the confusion about the -omagic command line switch.  Is it setting
 166        the output file name to "magic" or is it setting the NMAGIC flag on
 167        the output ?  It has been decided that it is setting the output file
 168        name, and that if you want to set the NMAGIC flag you should use -N
 169        or --omagic.  */
 170     EXACTLY_TWO_DASHES,
 171     /* Don't mention this option in --help output.  */
 172     NO_HELP
 173   } control;
 174 };
 175
 176 static const struct ld_option ld_options[] =
 177 {
 178   { {NULL, required_argument, NULL, '\0'},
 179       'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 180       ONE_DASH },
 181   { {"architecture", required_argument, NULL, 'A'},
 182       'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 183   { {"format", required_argument, NULL, 'b'},
 184       'b', N_("TARGET"), N_("Specify target for following input files"), TWO_DASHES },
 185   { {"mri-script", required_argument, NULL, 'c'},
 186       'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 187   { {"dc", no_argument, NULL, 'd'},
 188       'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 189   { {"dp", no_argument, NULL, 'd'},
 190       '\0', NULL, NULL, ONE_DASH },
 191   { {"entry", required_argument, NULL, 'e'},
 192       'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 193   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 194       'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 195   { {"EB", no_argument, NULL, OPTION_EB},
 196       '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 197   { {"EL", no_argument, NULL, OPTION_EL},
 198       '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 199   { {"auxiliary", required_argument, NULL, 'f'},
 200       'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 201       TWO_DASHES },
 202   { {"filter", required_argument, NULL, 'F'},
 203       'F', N_("SHLIB"), N_("Filter for shared object symbol table"), TWO_DASHES },
 204   { {NULL, no_argument, NULL, '\0'},
 205       'g', NULL, N_("Ignored"), ONE_DASH },
 206   { {"gpsize", required_argument, NULL, 'G'},
 207       'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 208       TWO_DASHES },
 209   { {"soname", required_argument, NULL, OPTION_SONAME},
 210       'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 211   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 212       'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"), TWO_DASHES },
 213   { {"library", required_argument, NULL, 'l'},
 214       'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 215   { {"library-path", required_argument, NULL, 'L'},
 216       'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"), TWO_DASHES },
 217   { {NULL, required_argument, NULL, '\0'},
 218       'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 219   { {"print-map", no_argument, NULL, 'M'},
 220       'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 221   { {"nmagic", no_argument, NULL, 'n'},
 222       'n', NULL, N_("Do not page align data"), TWO_DASHES },
 223   { {"omagic", no_argument, NULL, 'N'},
 224       'N', NULL, N_("Do not page align data, do not make text readonly"),
 225       EXACTLY_TWO_DASHES },
 226   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 227       '\0', NULL, N_("Page align data, make text readonly"), EXACTLY_TWO_DASHES },
 228   { {"output", required_argument, NULL, 'o'},
 229       'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 230   { {NULL, required_argument, NULL, '\0'},
 231       'O', NULL, N_("Optimize output file"), ONE_DASH },
 232   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 233       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 234   { {"emit-relocs", no_argument, NULL, 'q'},
 235       'q', NULL, "Generate relocations in final output", TWO_DASHES },
 236   { {"relocateable", no_argument, NULL, 'r'},
 237       'r', NULL, N_("Generate relocateable output"), TWO_DASHES },
 238   { {NULL, no_argument, NULL, '\0'},
 239       'i', NULL, NULL, ONE_DASH },
 240   { {"just-symbols", required_argument, NULL, 'R'},
 241       'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 242       TWO_DASHES },
 243   { {"strip-all", no_argument, NULL, 's'},
 244       's', NULL, N_("Strip all symbols"), TWO_DASHES },
 245   { {"strip-debug", no_argument, NULL, 'S'},
 246       'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 247   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 248       '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 249   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 250       '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 251   { {"trace", no_argument, NULL, 't'},
 252       't', NULL, N_("Trace file opens"), TWO_DASHES },
 253   { {"script", required_argument, NULL, 'T'},
 254       'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 255   { {"undefined", required_argument, NULL, 'u'},
 256       'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES },
 257   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 258       '\0', N_("[=SECTION]"), N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 259   { {"Ur", no_argument, NULL, OPTION_UR},
 260       '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 261   { {"version", no_argument, NULL, OPTION_VERSION},
 262       'v', NULL, N_("Print version information"), TWO_DASHES },
 263   { {NULL, no_argument, NULL, '\0'},
 264       'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 265   { {"discard-all", no_argument, NULL, 'x'},
 266       'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 267   { {"discard-locals", no_argument, NULL, 'X'},
 268       'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 269   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 270       '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 271   { {"trace-symbol", required_argument, NULL, 'y'},
 272       'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 273   { {NULL, required_argument, NULL, '\0'},
 274       'Y', N_("PATH"), N_("Default search path for Solaris compatibility"), ONE_DASH },
 275   { {"start-group", no_argument, NULL, '('},
 276       '(', NULL, N_("Start a group"), TWO_DASHES },
 277   { {"end-group", no_argument, NULL, ')'},
 278       ')', NULL, N_("End a group"), TWO_DASHES },
 279   { {"accept-unknown-input-arch", no_argument, NULL, OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 280     '\0', NULL, N_("Accept input files whose architecture cannot be determined"), TWO_DASHES },
 281   { {"no-accept-unknown-input-arch", no_argument, NULL, OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 282     '\0', NULL, N_("Reject input files whose architecture is unknown"), TWO_DASHES },
 283   { {"assert", required_argument, NULL, OPTION_ASSERT},
 284       '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 285   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 286       '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 287   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 288       '\0', NULL, NULL, ONE_DASH },
 289   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 290       '\0', NULL, NULL, ONE_DASH },
 291   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 292       '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 293   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 294       '\0', NULL, NULL, ONE_DASH },
 295   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 296       '\0', NULL, NULL, ONE_DASH },
 297   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 298       '\0', NULL, NULL, ONE_DASH },
 299   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 300       '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 301   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 302       '\0', NULL, N_("Check section addresses for overlaps (default)"), TWO_DASHES },
 303   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 304       '\0', NULL, N_("Do not check section addresses for overlaps"),
 305       TWO_DASHES },
 306   { {"cref", no_argument, NULL, OPTION_CREF},
 307       '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 308   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 309       '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 310   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 311       '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"), TWO_DASHES },
 312   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 313       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 314   { {"fini", required_argument, NULL, OPTION_FINI},
 315      '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 316   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 317       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 318   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 319       '\0', NULL, N_("Remove unused sections (on some targets)"),
 320       TWO_DASHES },
 321   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 322       '\0', NULL, N_("Don't remove unused sections (default)"),
 323       TWO_DASHES },
 324   { {"help", no_argument, NULL, OPTION_HELP},
 325       '\0', NULL, N_("Print option help"), TWO_DASHES },
 326   { {"init", required_argument, NULL, OPTION_INIT},
 327      '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 328   { {"Map", required_argument, NULL, OPTION_MAP},
 329       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 330   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 331       '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 332   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 333       '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 334   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 335       '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 336   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 337      '\0', NULL, N_("Allow no undefined symbols"), TWO_DASHES },
 338   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 339      '\0', NULL, N_("Allow undefined symbols in shared objects (the default)"), TWO_DASHES },
 340   { {"no-allow-shlib-undefined", no_argument, NULL, OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 341      '\0', NULL, N_("Do not allow undefined symbols in shared objects"), TWO_DASHES },
 342   { {"allow-multiple-definition", no_argument, NULL, OPTION_ALLOW_MULTIPLE_DEFINITION},
 343      '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 344   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 345      '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 346   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 347       '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 348   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 349       '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 350   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 351       '\0', NULL, N_("Create an output file even if errors occur"), TWO_DASHES },
 352   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 353       '\0', NULL, NULL, NO_HELP },
 354   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 355       '\0', NULL, N_("Only use library directories specified on\n\t\t\t\tthe command line"), ONE_DASH },
 356   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 357       '\0', N_("TARGET"), N_("Specify target of output file"), EXACTLY_TWO_DASHES },
 358   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 359       '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 360   { {"relax", no_argument, NULL, OPTION_RELAX},
 361       '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 362   { {"retain-symbols-file", required_argument, NULL,
 363        OPTION_RETAIN_SYMBOLS_FILE},
 364       '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 365   { {"rpath", required_argument, NULL, OPTION_RPATH},
 366       '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 367   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 368       '\0', N_("PATH"), N_("Set link time shared library search path"), ONE_DASH },
 369   { {"shared", no_argument, NULL, OPTION_SHARED},
 370       '\0', NULL, N_("Create a shared library"), ONE_DASH },
 371   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 372       '\0', NULL, NULL, ONE_DASH },
 373   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 374       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 375   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 376       '\0', NULL, NULL, NO_HELP },
 377   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 378       '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"), TWO_DASHES },
 379   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 380       '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"), TWO_DASHES },
 381   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 382       '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 383   { {"stats", no_argument, NULL, OPTION_STATS},
 384       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 385   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 386       '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 387   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 388       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 389   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 390       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 391   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 392       '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"), TWO_DASHES },
 393   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 394       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 395   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 396       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 397   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 398       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 399   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 400       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 401   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 402       '\0', NULL, NULL, NO_HELP },
 403   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 404       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 405   { {"version-exports-section", required_argument, NULL,
 406      OPTION_VERSION_EXPORTS_SECTION },
 407     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n\t\t\t\tSYMBOL as the version."),
 408     TWO_DASHES },
 409   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 410       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 411   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 412       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 413       TWO_DASHES },
 414   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 415       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 416   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 417       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 418   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 419       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 420       TWO_DASHES },
 421   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 422      '\0', NULL, N_("Treat warnings as errors"),
 423      TWO_DASHES },
 424   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 425       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 426   { {"wrap", required_argument, NULL, OPTION_WRAP},
 427       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 428   { {"mpc860c0", optional_argument, NULL, OPTION_MPC860C0},
 429       '\0', N_("[=WORDS]"), N_("Modify problematic branches in last WORDS (1-10,\n\t\t\t\tdefault 5) words of a page"), TWO_DASHES }
 430 };
 431
 432 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 433
 434 /* Test STRING for containing a string of digits that form a number
 435    between MIN and MAX.  The return value is the number or ERR.  */
 436
 437 static int
 438 is_num (string, min, max, err)
 439      const char *string;
 440      int min;
 441      int max;
 442      int err;
 443 {
 444   int result = 0;
 445
 446   for (; *string; ++string)
 447     {
 448       if (! ISDIGIT (*string))
 449         {
 450           result = err;
 451           break;
 452         }
 453       result = result * 10 + (*string - '0');
 454     }
 455   if (result < min || result > max)
 456     result = err;
 457
 458   return result;
 459 }
 460
 461 void
 462 parse_args (argc, argv)
 463      unsigned argc;
 464      char **argv;
 465 {
 466   unsigned i;
 467   int is, il, irl;
 468   int ingroup = 0;
 469   char *default_dirlist = NULL;
 470   char shortopts[OPTION_COUNT * 3 + 2];
 471   struct option longopts[OPTION_COUNT + 1];
 472   struct option really_longopts[OPTION_COUNT + 1];
 473   int last_optind;
 474
 475   /* Starting the short option string with '-' is for programs that
 476      expect options and other ARGV-elements in any order and that care about
 477      the ordering of the two.  We describe each non-option ARGV-element
 478      as if it were the argument of an option with character code 1.  */
 479   shortopts[0] = '-';
 480   is = 1;
 481   il = 0;
 482   irl = 0;
 483   for (i = 0; i < OPTION_COUNT; i++)
 484     {
 485       if (ld_options[i].shortopt != '\0')
 486         {
 487           shortopts[is] = ld_options[i].shortopt;
 488           ++is;
 489           if (ld_options[i].opt.has_arg == required_argument
 490               || ld_options[i].opt.has_arg == optional_argument)
 491             {
 492               shortopts[is] = ':';
 493               ++is;
 494               if (ld_options[i].opt.has_arg == optional_argument)
 495                 {
 496                   shortopts[is] = ':';
 497                   ++is;
 498                 }
 499             }
 500         }
 501       if (ld_options[i].opt.name != NULL)
 502         {
 503           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 504             {
 505               really_longopts[irl] = ld_options[i].opt;
 506               ++irl;
 507             }
 508           else
 509             {
 510               longopts[il] = ld_options[i].opt;
 511               ++il;
 512             }
 513         }
 514     }
 515   shortopts[is] = '\0';
 516   longopts[il].name = NULL;
 517   really_longopts[irl].name = NULL;
 518
 519   /* The -G option is ambiguous on different platforms.  Sometimes it
 520      specifies the largest data size to put into the small data
 521      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 522      the first form takes an argument, while the second does not.
 523
 524      We need to permit the --shared form because on some platforms,
 525      such as Solaris, gcc -shared will pass -G to the linker.
 526
 527      To permit either usage, we look through the argument list.  If we
 528      find -G not followed by a number, we change it into --shared.
 529      This will work for most normal cases.  */
 530   for (i = 1; i < argc; i++)
 531     if (strcmp (argv[i], "-G") == 0
 532         && (i + 1 >= argc
 533             || ! ISDIGIT (argv[i + 1][0])))
 534       argv[i] = (char *) "--shared";
 535
 536   /* Because we permit long options to start with a single dash, and
 537      we have a --library option, and the -l option is conventionally
 538      used with an immediately following argument, we can have bad
 539      results if somebody tries to use -l with a library whose name
 540      happens to start with "ibrary", as in -li.  We avoid problems by
 541      simply turning -l into --library.  This means that users will
 542      have to use two dashes in order to use --library, which is OK
 543      since that's how it is documented.
 544
 545      FIXME: It's possible that this problem can arise for other short
 546      options as well, although the user does always have the recourse
 547      of adding a space between the option and the argument.  */
 548   for (i = 1; i < argc; i++)
 549     {
 550       if (argv[i][0] == '-'
 551           && argv[i][1] == 'l'
 552           && argv[i][2] != '\0')
 553         {
 554           char *n;
 555
 556           n = (char *) xmalloc (strlen (argv[i]) + 20);
 557           sprintf (n, "--library=%s", argv[i] + 2);
 558           argv[i] = n;
 559         }
 560     }
 561
 562   last_optind = -1;
 563   while (1)
 564     {
 565       int longind;
 566       int optc;
 567
 568       /* Using last_optind lets us avoid calling ldemul_parse_args
 569          multiple times on a single option, which would lead to
 570          confusion in the internal static variables maintained by
 571          getopt.  This could otherwise happen for an argument like
 572          -nx, in which the -n is parsed as a single option, and we
 573          loop around to pick up the -x.  */
 574       if (optind != last_optind)
 575         if (ldemul_parse_args (argc, argv))
 576           continue;
 577
 578       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 579          can indicate a long option.  */
 580       opterr = 0;
 581       last_optind = optind;
 582       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 583       if (optc == '?')
 584         {
 585           optind = last_optind;
 586           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 587         }
 588
 589       if (optc == -1)
 590         break;
 591
 592       switch (optc)
 593         {
 594         case '?':
 595           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 596         default:
 597           einfo (_("%P%F: use the --help option for usage information\n"));
 598
 599         case 1:                 /* File name.  */
 600           lang_add_input_file (optarg, lang_input_file_is_file_enum,
 601                                (char *) NULL);
 602           break;
 603
 604         case OPTION_IGNORE:
 605           break;
 606         case 'a':
 607           /* For HP/UX compatibility.  Actually -a shared should mean
 608              ``use only shared libraries'' but, then, we don't
 609              currently support shared libraries on HP/UX anyhow.  */
 610           if (strcmp (optarg, "archive") == 0)
 611             config.dynamic_link = FALSE;
 612           else if (strcmp (optarg, "shared") == 0
 613                    || strcmp (optarg, "default") == 0)
 614             config.dynamic_link = TRUE;
 615           else
 616             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 617           break;
 618         case OPTION_ASSERT:
 619           /* FIXME: We just ignore these, but we should handle them.  */
 620           if (strcmp (optarg, "definitions") == 0)
 621             ;
 622           else if (strcmp (optarg, "nodefinitions") == 0)
 623             ;
 624           else if (strcmp (optarg, "nosymbolic") == 0)
 625             ;
 626           else if (strcmp (optarg, "pure-text") == 0)
 627             ;
 628           else
 629             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 630           break;
 631         case 'A':
 632           ldfile_add_arch (optarg);
 633           break;
 634         case 'b':
 635           lang_add_target (optarg);
 636           break;
 637         case 'c':
 638           ldfile_open_command_file (optarg);
 639           parser_input = input_mri_script;
 640           yyparse ();
 641           break;
 642         case OPTION_CALL_SHARED:
 643           config.dynamic_link = TRUE;
 644           break;
 645         case OPTION_NON_SHARED:
 646           config.dynamic_link = FALSE;
 647           break;
 648         case OPTION_CREF:
 649           command_line.cref = TRUE;
 650           link_info.notice_all = TRUE;
 651           break;
 652         case 'd':
 653           command_line.force_common_definition = TRUE;
 654           break;
 655         case OPTION_DEFSYM:
 656           lex_string = optarg;
 657           lex_redirect (optarg);
 658           parser_input = input_defsym;
 659           parsing_defsym = 1;
 660           yyparse ();
 661           parsing_defsym = 0;
 662           lex_string = NULL;
 663           break;
 664         case OPTION_DEMANGLE:
 665           demangling = TRUE;
 666           if (optarg != NULL)
 667             {
 668               enum demangling_styles style;
 669
 670               style = cplus_demangle_name_to_style (optarg);
 671               if (style == unknown_demangling)
 672                 einfo (_("%F%P: unknown demangling style `%s'"),
 673                        optarg);
 674
 675               cplus_demangle_set_style (style);
 676             }
 677           break;
 678         case 'I':               /* Used on Solaris.  */
 679         case OPTION_DYNAMIC_LINKER:
 680           command_line.interpreter = optarg;
 681           break;
 682         case OPTION_EB:
 683           command_line.endian = ENDIAN_BIG;
 684           break;
 685         case OPTION_EL:
 686           command_line.endian = ENDIAN_LITTLE;
 687           break;
 688         case OPTION_EMBEDDED_RELOCS:
 689           command_line.embedded_relocs = TRUE;
 690           break;
 691         case OPTION_EXPORT_DYNAMIC:
 692         case 'E': /* HP/UX compatibility.  */
 693           link_info.export_dynamic = TRUE;
 694           break;
 695         case 'e':
 696           lang_add_entry (optarg, TRUE);
 697           break;
 698         case 'f':
 699           if (command_line.auxiliary_filters == NULL)
 700             {
 701               command_line.auxiliary_filters =
 702                 (char **) xmalloc (2 * sizeof (char *));
 703               command_line.auxiliary_filters[0] = optarg;
 704               command_line.auxiliary_filters[1] = NULL;
 705             }
 706           else
 707             {
 708               int c;
 709               char **p;
 710
 711               c = 0;
 712               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 713                 ++c;
 714               command_line.auxiliary_filters =
 715                 (char **) xrealloc (command_line.auxiliary_filters,
 716                                     (c + 2) * sizeof (char *));
 717               command_line.auxiliary_filters[c] = optarg;
 718               command_line.auxiliary_filters[c + 1] = NULL;
 719             }
 720           break;
 721         case 'F':
 722           command_line.filter_shlib = optarg;
 723           break;
 724         case OPTION_FORCE_EXE_SUFFIX:
 725           command_line.force_exe_suffix = TRUE;
 726           break;
 727         case 'G':
 728           {
 729             char *end;
 730             g_switch_value = strtoul (optarg, &end, 0);
 731             if (*end)
 732               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 733           }
 734           break;
 735         case 'g':
 736           /* Ignore.  */
 737           break;
 738         case OPTION_GC_SECTIONS:
 739           command_line.gc_sections = TRUE;
 740           break;
 741         case OPTION_HELP:
 742           help ();
 743           xexit (0);
 744           break;
 745         case 'L':
 746           ldfile_add_library_path (optarg, TRUE);
 747           break;
 748         case 'l':
 749           lang_add_input_file (optarg, lang_input_file_is_l_enum,
 750                                (char *) NULL);
 751           break;
 752         case 'M':
 753           config.map_filename = "-";
 754           break;
 755         case 'm':
 756           /* Ignore.  Was handled in a pre-parse.   */
 757           break;
 758         case OPTION_MAP:
 759           config.map_filename = optarg;
 760           break;
 761         case 'N':
 762           config.text_read_only = FALSE;
 763           config.magic_demand_paged = FALSE;
 764           config.dynamic_link = FALSE;
 765           break;
 766         case OPTION_NO_OMAGIC:
 767           config.text_read_only = TRUE;
 768           config.magic_demand_paged = TRUE;
 769           /* NB/ Does not set dynamic_link to TRUE.
 770              Use --call-shared or -Bdynamic for this.  */
 771           break;
 772         case 'n':
 773           config.magic_demand_paged = FALSE;
 774           config.dynamic_link = FALSE;
 775           break;
 776         case OPTION_NO_DEFINE_COMMON:
 777           command_line.inhibit_common_definition = TRUE;
 778           break;
 779         case OPTION_NO_DEMANGLE:
 780           demangling = FALSE;
 781           break;
 782         case OPTION_NO_GC_SECTIONS:
 783           command_line.gc_sections = FALSE;
 784           break;
 785         case OPTION_NO_KEEP_MEMORY:
 786           link_info.keep_memory = FALSE;
 787           break;
 788         case OPTION_NO_UNDEFINED:
 789           link_info.no_undefined = TRUE;
 790           break;
 791         case OPTION_ALLOW_SHLIB_UNDEFINED:
 792           link_info.allow_shlib_undefined = TRUE;
 793           break;
 794         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 795           link_info.allow_shlib_undefined = FALSE;
 796           break;
 797         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 798           link_info.allow_multiple_definition = TRUE;
 799           break;
 800         case OPTION_NO_UNDEFINED_VERSION:
 801           link_info.allow_undefined_version = FALSE;
 802           break;
 803         case OPTION_NO_WARN_MISMATCH:
 804           command_line.warn_mismatch = FALSE;
 805           break;
 806         case OPTION_NOINHIBIT_EXEC:
 807           force_make_executable = TRUE;
 808           break;
 809         case OPTION_NOSTDLIB:
 810           config.only_cmd_line_lib_dirs = TRUE;
 811           break;
 812         case OPTION_NO_WHOLE_ARCHIVE:
 813           whole_archive = FALSE;
 814           break;
 815         case 'O':
 816           /* FIXME "-O<non-digits> <value>" used to set the address of
 817              section <non-digits>.  Was this for compatibility with
 818              something, or can we create a new option to do that
 819              (with a syntax similar to -defsym)?
 820              getopt can't handle two args to an option without kludges.  */
 821
 822           /* Enable optimizations of output files.  */
 823           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 824           break;
 825         case 'o':
 826           lang_add_output (optarg, 0);
 827           break;
 828         case OPTION_OFORMAT:
 829           lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 830           break;
 831         case 'q':
 832           link_info.emitrelocations = TRUE;
 833           break;
 834         case 'i':
 835         case 'r':
 836           if (optind == last_optind)
 837             /* This can happen if the user put "-rpath,a" on the command
 838                line.  (Or something similar.  The comma is important).
 839                Getopt becomes confused and thinks that this is a -r option
 840                but it cannot parse the text after the -r so it refuses to
 841                increment the optind counter.  Detect this case and issue
 842                an error message here.  We cannot just make this a warning,
 843                increment optind, and continue because getopt is too confused
 844                and will seg-fault the next time around.  */
 845             einfo(_("%P%F: bad -rpath option\n"));
 846
 847           link_info.relocateable = TRUE;
 848           config.build_constructors = FALSE;
 849           config.magic_demand_paged = FALSE;
 850           config.text_read_only = FALSE;
 851           config.dynamic_link = FALSE;
 852           break;
 853         case 'R':
 854           /* The GNU linker traditionally uses -R to mean to include
 855              only the symbols from a file.  The Solaris linker uses -R
 856              to set the path used by the runtime linker to find
 857              libraries.  This is the GNU linker -rpath argument.  We
 858              try to support both simultaneously by checking the file
 859              named.  If it is a directory, rather than a regular file,
 860              we assume -rpath was meant.  */
 861           {
 862             struct stat s;
 863
 864             if (stat (optarg, &s) >= 0
 865                 && ! S_ISDIR (s.st_mode))
 866               {
 867                 lang_add_input_file (optarg,
 868                                      lang_input_file_is_symbols_only_enum,
 869                                      (char *) NULL);
 870                 break;
 871               }
 872           }
 873           /* Fall through.  */
 874         case OPTION_RPATH:
 875           if (command_line.rpath == NULL)
 876             command_line.rpath = xstrdup (optarg);
 877           else
 878             {
 879               size_t rpath_len = strlen (command_line.rpath);
 880               size_t optarg_len = strlen (optarg);
 881               char *buf;
 882               char *cp = command_line.rpath;
 883
 884               /* First see whether OPTARG is already in the path.  */
 885               do
 886                 {
 887                   size_t idx = 0;
 888
 889                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 890                     ++idx;
 891                   if (optarg[idx] == '\0'
 892                       && (cp[idx] == '\0' || cp[idx] == ':'))
 893                     /* We found it.  */
 894                     break;
 895
 896                   /* Not yet found.  */
 897                   cp = strchr (cp, ':');
 898                   if (cp != NULL)
 899                     ++cp;
 900                 }
 901               while (cp != NULL);
 902
 903               if (cp == NULL)
 904                 {
 905                   buf = xmalloc (rpath_len + optarg_len + 2);
 906                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
 907                   free (command_line.rpath);
 908                   command_line.rpath = buf;
 909                 }
 910             }
 911           break;
 912         case OPTION_RPATH_LINK:
 913           if (command_line.rpath_link == NULL)
 914             command_line.rpath_link = xstrdup (optarg);
 915           else
 916             {
 917               char *buf;
 918
 919               buf = xmalloc (strlen (command_line.rpath_link)
 920                              + strlen (optarg)
 921                              + 2);
 922               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 923               free (command_line.rpath_link);
 924               command_line.rpath_link = buf;
 925             }
 926           break;
 927         case OPTION_RELAX:
 928           command_line.relax = TRUE;
 929           break;
 930         case OPTION_RETAIN_SYMBOLS_FILE:
 931           add_keepsyms_file (optarg);
 932           break;
 933         case 'S':
 934           link_info.strip = strip_debugger;
 935           break;
 936         case 's':
 937           link_info.strip = strip_all;
 938           break;
 939         case OPTION_STRIP_DISCARDED:
 940           link_info.strip_discarded = TRUE;
 941           break;
 942         case OPTION_NO_STRIP_DISCARDED:
 943           link_info.strip_discarded = FALSE;
 944           break;
 945         case OPTION_SHARED:
 946           if (config.has_shared)
 947             link_info.shared = TRUE;
 948           else
 949             einfo (_("%P%F: -shared not supported\n"));
 950           break;
 951         case 'h':               /* Used on Solaris.  */
 952         case OPTION_SONAME:
 953           command_line.soname = optarg;
 954           break;
 955         case OPTION_SORT_COMMON:
 956           config.sort_common = TRUE;
 957           break;
 958         case OPTION_STATS:
 959           config.stats = TRUE;
 960           break;
 961         case OPTION_SYMBOLIC:
 962           link_info.symbolic = TRUE;
 963           break;
 964         case 't':
 965           trace_files = TRUE;
 966           break;
 967         case 'T':
 968           ldfile_open_command_file (optarg);
 969           parser_input = input_script;
 970           yyparse ();
 971           break;
 972         case OPTION_SECTION_START:
 973           {
 974             char *optarg2;
 975             char *sec_name;
 976             int len;
 977
 978             /* Check for <something>=<somthing>...  */
 979             optarg2 = strchr (optarg, '=');
 980             if (optarg2 == NULL)
 981               einfo (_("%P%F: invalid argument to option \"--section-start\"\n"));
 982
 983             optarg2++;
 984
 985             /* So far so good.  Are all the args present?  */
 986             if ((*optarg == '\0') || (*optarg2 == '\0'))
 987               einfo (_("%P%F: missing argument(s) to option \"--section-start\"\n"));
 988
 989             /* We must copy the section name as set_section_start
 990                doesn't do it for us.  */
 991             len = optarg2 - optarg;
 992             sec_name = xmalloc (len);
 993             memcpy (sec_name, optarg, len - 1);
 994             sec_name[len - 1] = 0;
 995
 996             /* Then set it...  */
 997             set_section_start (sec_name, optarg2);
 998           }
 999           break;
1000         case OPTION_TARGET_HELP:
1001           /* Mention any target specific options.  */
1002           ldemul_list_emulation_options (stdout);
1003           exit (0);
1004         case OPTION_TBSS:
1005           set_section_start (".bss", optarg);
1006           break;
1007         case OPTION_TDATA:
1008           set_section_start (".data", optarg);
1009           break;
1010         case OPTION_TTEXT:
1011           set_section_start (".text", optarg);
1012           break;
1013         case OPTION_TRADITIONAL_FORMAT:
1014           link_info.traditional_format = TRUE;
1015           break;
1016         case OPTION_TASK_LINK:
1017           link_info.task_link = TRUE;
1018           /* Fall through - do an implied -r option.  */
1019         case OPTION_UR:
1020           link_info.relocateable = TRUE;
1021           config.build_constructors = TRUE;
1022           config.magic_demand_paged = FALSE;
1023           config.text_read_only = FALSE;
1024           config.dynamic_link = FALSE;
1025           break;
1026         case 'u':
1027           ldlang_add_undef (optarg);
1028           break;
1029         case OPTION_UNIQUE:
1030           if (optarg != NULL)
1031             lang_add_unique (optarg);
1032           else
1033             config.unique_orphan_sections = TRUE;
1034           break;
1035         case OPTION_VERBOSE:
1036           ldversion (1);
1037           version_printed = TRUE;
1038           trace_file_tries = TRUE;
1039           break;
1040         case 'v':
1041           ldversion (0);
1042           version_printed = TRUE;
1043           break;
1044         case 'V':
1045           ldversion (1);
1046           version_printed = TRUE;
1047           break;
1048         case OPTION_VERSION:
1049           ldversion (2);
1050           xexit (0);
1051           break;
1052         case OPTION_VERSION_SCRIPT:
1053           /* This option indicates a small script that only specifies
1054              version information.  Read it, but don't assume that
1055              we've seen a linker script.  */
1056           {
1057             FILE *hold_script_handle;
1058
1059             hold_script_handle = saved_script_handle;
1060             ldfile_open_command_file (optarg);
1061             saved_script_handle = hold_script_handle;
1062             parser_input = input_version_script;
1063             yyparse ();
1064           }
1065           break;
1066         case OPTION_VERSION_EXPORTS_SECTION:
1067           /* This option records a version symbol to be applied to the
1068              symbols listed for export to be found in the object files
1069              .exports sections.  */
1070           command_line.version_exports_section = optarg;
1071           break;
1072         case OPTION_WARN_COMMON:
1073           config.warn_common = TRUE;
1074           break;
1075         case OPTION_WARN_CONSTRUCTORS:
1076           config.warn_constructors = TRUE;
1077           break;
1078         case OPTION_WARN_FATAL:
1079           config.fatal_warnings = TRUE;
1080           break;
1081         case OPTION_WARN_MULTIPLE_GP:
1082           config.warn_multiple_gp = TRUE;
1083           break;
1084         case OPTION_WARN_ONCE:
1085           config.warn_once = TRUE;
1086           break;
1087         case OPTION_WARN_SECTION_ALIGN:
1088           config.warn_section_align = TRUE;
1089           break;
1090         case OPTION_WHOLE_ARCHIVE:
1091           whole_archive = TRUE;
1092           break;
1093         case OPTION_WRAP:
1094           add_wrap (optarg);
1095           break;
1096         case OPTION_DISCARD_NONE:
1097           link_info.discard = discard_none;
1098           break;
1099         case 'X':
1100           link_info.discard = discard_l;
1101           break;
1102         case 'x':
1103           link_info.discard = discard_all;
1104           break;
1105         case 'Y':
1106           if (strncmp (optarg, "P,", 2) == 0)
1107             optarg += 2;
1108           default_dirlist = xstrdup (optarg);
1109           break;
1110         case 'y':
1111           add_ysym (optarg);
1112           break;
1113         case OPTION_SPARE_DYNAMIC_TAGS:
1114           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1115           break;
1116         case OPTION_SPLIT_BY_RELOC:
1117           if (optarg != NULL)
1118             config.split_by_reloc = strtoul (optarg, NULL, 0);
1119           else
1120             config.split_by_reloc = 32768;
1121           break;
1122         case OPTION_SPLIT_BY_FILE:
1123           if (optarg != NULL)
1124             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1125           else
1126             config.split_by_file = 1;
1127           break;
1128         case OPTION_CHECK_SECTIONS:
1129           command_line.check_section_addresses = TRUE;
1130           break;
1131         case OPTION_NO_CHECK_SECTIONS:
1132           command_line.check_section_addresses = FALSE;
1133           break;
1134         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1135           command_line.accept_unknown_input_arch = TRUE;
1136           break;
1137         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1138           command_line.accept_unknown_input_arch = FALSE;
1139           break;
1140         case '(':
1141           if (ingroup)
1142             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1143
1144           lang_enter_group ();
1145           ingroup = 1;
1146           break;
1147         case ')':
1148           if (! ingroup)
1149             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1150
1151           lang_leave_group ();
1152           ingroup = 0;
1153           break;
1154         case OPTION_MPC860C0:
1155           /* Default value (in bytes).  */
1156           link_info.mpc860c0 = 20;
1157           if (optarg)
1158             {
1159               unsigned words;
1160
1161               words = is_num (optarg, 1, 10, 0);
1162               if (words == 0)
1163                 einfo (_("%P%F: invalid argument to option \"mpc860c0\"\n"));
1164
1165               /* Convert words to bytes.  */
1166               link_info.mpc860c0 = words * 4;
1167             }
1168           command_line.relax = TRUE;
1169           break;
1170
1171         case OPTION_INIT:
1172           link_info.init_function = optarg;
1173           break;
1174
1175         case OPTION_FINI:
1176           link_info.fini_function = optarg;
1177           break;
1178         }
1179     }
1180
1181   if (ingroup)
1182     lang_leave_group ();
1183
1184   if (default_dirlist != NULL)
1185     set_default_dirlist (default_dirlist);
1186
1187 }
1188
1189 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1190    library search path.  */
1191
1192 static void
1193 set_default_dirlist (dirlist_ptr)
1194      char *dirlist_ptr;
1195 {
1196   char *p;
1197
1198   while (1)
1199     {
1200       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1201       if (p != NULL)
1202         *p = '\0';
1203       if (*dirlist_ptr != '\0')
1204         ldfile_add_library_path (dirlist_ptr, TRUE);
1205       if (p == NULL)
1206         break;
1207       dirlist_ptr = p + 1;
1208     }
1209 }
1210
1211 static void
1212 set_section_start (sect, valstr)
1213      char *sect, *valstr;
1214 {
1215   const char *end;
1216   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1217   if (*end)
1218     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1219   lang_section_start (sect, exp_intop (val));
1220 }
1221 \f
1222 /* Print help messages for the options.  */
1223
1224 static void
1225 help ()
1226 {
1227   unsigned i;
1228   const char **targets, **pp;
1229
1230   printf (_("Usage: %s [options] file...\n"), program_name);
1231
1232   printf (_("Options:\n"));
1233   for (i = 0; i < OPTION_COUNT; i++)
1234     {
1235       if (ld_options[i].doc != NULL)
1236         {
1237           bfd_boolean comma;
1238           int len;
1239           unsigned j;
1240
1241           printf ("  ");
1242
1243           comma = FALSE;
1244           len = 2;
1245
1246           j = i;
1247           do
1248             {
1249               if (ld_options[j].shortopt != '\0'
1250                   && ld_options[j].control != NO_HELP)
1251                 {
1252                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1253                   len += (comma ? 2 : 0) + 2;
1254                   if (ld_options[j].arg != NULL)
1255                     {
1256                       if (ld_options[j].opt.has_arg != optional_argument)
1257                         {
1258                           printf (" ");
1259                           ++len;
1260                         }
1261                       printf ("%s", _(ld_options[j].arg));
1262                       len += strlen (_(ld_options[j].arg));
1263                     }
1264                   comma = TRUE;
1265                 }
1266               ++j;
1267             }
1268           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1269
1270           j = i;
1271           do
1272             {
1273               if (ld_options[j].opt.name != NULL
1274                   && ld_options[j].control != NO_HELP)
1275                 {
1276                   int two_dashes =
1277                     (ld_options[j].control == TWO_DASHES
1278                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1279
1280                   printf ("%s-%s%s",
1281                           comma ? ", " : "",
1282                           two_dashes ? "-" : "",
1283                           ld_options[j].opt.name);
1284                   len += ((comma ? 2 : 0)
1285                           + 1
1286                           + (two_dashes ? 1 : 0)
1287                           + strlen (ld_options[j].opt.name));
1288                   if (ld_options[j].arg != NULL)
1289                     {
1290                       printf (" %s", _(ld_options[j].arg));
1291                       len += 1 + strlen (_(ld_options[j].arg));
1292                     }
1293                   comma = TRUE;
1294                 }
1295               ++j;
1296             }
1297           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1298
1299           if (len >= 30)
1300             {
1301               printf ("\n");
1302               len = 0;
1303             }
1304
1305           for (; len < 30; len++)
1306             putchar (' ');
1307
1308           printf ("%s\n", _(ld_options[i].doc));
1309         }
1310     }
1311
1312   /* Note: Various tools (such as libtool) depend upon the
1313      format of the listings below - do not change them.  */
1314   /* xgettext:c-format */
1315   printf (_("%s: supported targets:"), program_name);
1316   targets = bfd_target_list ();
1317   for (pp = targets; *pp != NULL; pp++)
1318     printf (" %s", *pp);
1319   free (targets);
1320   printf ("\n");
1321
1322   /* xgettext:c-format */
1323   printf (_("%s: supported emulations: "), program_name);
1324   ldemul_list_emulations (stdout);
1325   printf ("\n");
1326
1327   /* xgettext:c-format */
1328   printf (_("%s: emulation specific options:\n"), program_name);
1329   ldemul_list_emulation_options (stdout);
1330   printf ("\n");
1331
1332   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1333 }