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 void set_default_dirlist (char *);
  57 static void set_section_start (char *, char *);
  58 static void help (void);
  59
  60 /* Non-zero if we are processing a --defsym from the command line.  */
  61 int parsing_defsym = 0;
  62
  63 /* Codes used for the long options with no short synonyms.  150 isn't
  64    special; it's just an arbitrary non-ASCII char value.  */
  65
  66 #define OPTION_ASSERT                   150
  67 #define OPTION_CALL_SHARED              (OPTION_ASSERT + 1)
  68 #define OPTION_CREF                     (OPTION_CALL_SHARED + 1)
  69 #define OPTION_DEFSYM                   (OPTION_CREF + 1)
  70 #define OPTION_DEMANGLE                 (OPTION_DEFSYM + 1)
  71 #define OPTION_DYNAMIC_LINKER           (OPTION_DEMANGLE + 1)
  72 #define OPTION_EB                       (OPTION_DYNAMIC_LINKER + 1)
  73 #define OPTION_EL                       (OPTION_EB + 1)
  74 #define OPTION_EMBEDDED_RELOCS          (OPTION_EL + 1)
  75 #define OPTION_EXPORT_DYNAMIC           (OPTION_EMBEDDED_RELOCS + 1)
  76 #define OPTION_HELP                     (OPTION_EXPORT_DYNAMIC + 1)
  77 #define OPTION_IGNORE                   (OPTION_HELP + 1)
  78 #define OPTION_MAP                      (OPTION_IGNORE + 1)
  79 #define OPTION_NO_DEMANGLE              (OPTION_MAP + 1)
  80 #define OPTION_NO_KEEP_MEMORY           (OPTION_NO_DEMANGLE + 1)
  81 #define OPTION_NO_WARN_MISMATCH         (OPTION_NO_KEEP_MEMORY + 1)
  82 #define OPTION_NOINHIBIT_EXEC           (OPTION_NO_WARN_MISMATCH + 1)
  83 #define OPTION_NON_SHARED               (OPTION_NOINHIBIT_EXEC + 1)
  84 #define OPTION_NO_WHOLE_ARCHIVE         (OPTION_NON_SHARED + 1)
  85 #define OPTION_OFORMAT                  (OPTION_NO_WHOLE_ARCHIVE + 1)
  86 #define OPTION_RELAX                    (OPTION_OFORMAT + 1)
  87 #define OPTION_RETAIN_SYMBOLS_FILE      (OPTION_RELAX + 1)
  88 #define OPTION_RPATH                    (OPTION_RETAIN_SYMBOLS_FILE + 1)
  89 #define OPTION_RPATH_LINK               (OPTION_RPATH + 1)
  90 #define OPTION_SHARED                   (OPTION_RPATH_LINK + 1)
  91 #define OPTION_SONAME                   (OPTION_SHARED + 1)
  92 #define OPTION_SORT_COMMON              (OPTION_SONAME + 1)
  93 #define OPTION_STATS                    (OPTION_SORT_COMMON + 1)
  94 #define OPTION_SYMBOLIC                 (OPTION_STATS + 1)
  95 #define OPTION_TASK_LINK                (OPTION_SYMBOLIC + 1)
  96 #define OPTION_TBSS                     (OPTION_TASK_LINK + 1)
  97 #define OPTION_TDATA                    (OPTION_TBSS + 1)
  98 #define OPTION_TTEXT                    (OPTION_TDATA + 1)
  99 #define OPTION_TRADITIONAL_FORMAT       (OPTION_TTEXT + 1)
 100 #define OPTION_UR                       (OPTION_TRADITIONAL_FORMAT + 1)
 101 #define OPTION_VERBOSE                  (OPTION_UR + 1)
 102 #define OPTION_VERSION                  (OPTION_VERBOSE + 1)
 103 #define OPTION_VERSION_SCRIPT           (OPTION_VERSION + 1)
 104 #define OPTION_VERSION_EXPORTS_SECTION  (OPTION_VERSION_SCRIPT + 1)
 105 #define OPTION_WARN_COMMON              (OPTION_VERSION_EXPORTS_SECTION + 1)
 106 #define OPTION_WARN_CONSTRUCTORS        (OPTION_WARN_COMMON + 1)
 107 #define OPTION_WARN_FATAL               (OPTION_WARN_CONSTRUCTORS + 1)
 108 #define OPTION_WARN_MULTIPLE_GP         (OPTION_WARN_FATAL + 1)
 109 #define OPTION_WARN_ONCE                (OPTION_WARN_MULTIPLE_GP + 1)
 110 #define OPTION_WARN_SECTION_ALIGN       (OPTION_WARN_ONCE + 1)
 111 #define OPTION_SPLIT_BY_RELOC           (OPTION_WARN_SECTION_ALIGN + 1)
 112 #define OPTION_SPLIT_BY_FILE            (OPTION_SPLIT_BY_RELOC + 1)
 113 #define OPTION_WHOLE_ARCHIVE            (OPTION_SPLIT_BY_FILE + 1)
 114 #define OPTION_WRAP                     (OPTION_WHOLE_ARCHIVE + 1)
 115 #define OPTION_FORCE_EXE_SUFFIX         (OPTION_WRAP + 1)
 116 #define OPTION_GC_SECTIONS              (OPTION_FORCE_EXE_SUFFIX + 1)
 117 #define OPTION_NO_GC_SECTIONS           (OPTION_GC_SECTIONS + 1)
 118 #define OPTION_CHECK_SECTIONS           (OPTION_NO_GC_SECTIONS + 1)
 119 #define OPTION_NO_CHECK_SECTIONS        (OPTION_CHECK_SECTIONS + 1)
 120 #define OPTION_MPC860C0                 (OPTION_NO_CHECK_SECTIONS + 1)
 121 #define OPTION_NO_UNDEFINED             (OPTION_MPC860C0 + 1)
 122 #define OPTION_INIT                     (OPTION_NO_UNDEFINED + 1)
 123 #define OPTION_FINI                     (OPTION_INIT + 1)
 124 #define OPTION_SECTION_START            (OPTION_FINI + 1)
 125 #define OPTION_UNIQUE                   (OPTION_SECTION_START + 1)
 126 #define OPTION_TARGET_HELP              (OPTION_UNIQUE + 1)
 127 #define OPTION_ALLOW_SHLIB_UNDEFINED    (OPTION_TARGET_HELP + 1)
 128 #define OPTION_NO_ALLOW_SHLIB_UNDEFINED (OPTION_ALLOW_SHLIB_UNDEFINED + 1)
 129 #define OPTION_ALLOW_MULTIPLE_DEFINITION (OPTION_NO_ALLOW_SHLIB_UNDEFINED + 1)
 130 #define OPTION_NO_UNDEFINED_VERSION     (OPTION_ALLOW_MULTIPLE_DEFINITION + 1)
 131 #define OPTION_DISCARD_NONE             (OPTION_NO_UNDEFINED_VERSION + 1)
 132 #define OPTION_SPARE_DYNAMIC_TAGS       (OPTION_DISCARD_NONE + 1)
 133 #define OPTION_NO_DEFINE_COMMON         (OPTION_SPARE_DYNAMIC_TAGS + 1)
 134 #define OPTION_NOSTDLIB                 (OPTION_NO_DEFINE_COMMON + 1)
 135 #define OPTION_NO_OMAGIC                (OPTION_NOSTDLIB + 1)
 136 #define OPTION_STRIP_DISCARDED          (OPTION_NO_OMAGIC + 1)
 137 #define OPTION_NO_STRIP_DISCARDED       (OPTION_STRIP_DISCARDED + 1)
 138 #define OPTION_ACCEPT_UNKNOWN_INPUT_ARCH    (OPTION_NO_STRIP_DISCARDED + 1)
 139 #define OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH (OPTION_ACCEPT_UNKNOWN_INPUT_ARCH + 1)
 140 #define OPTION_PIE                      (OPTION_NO_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   { {"relocatable", no_argument, NULL, 'r'},
 237       'r', NULL, N_("Generate relocatable 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   { {"pie", no_argument, NULL, OPTION_PIE},
 374       '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 375   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 376       '\0', NULL, NULL, TWO_DASHES },
 377   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 378       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 379   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 380       '\0', NULL, NULL, NO_HELP },
 381   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 382       '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"), TWO_DASHES },
 383   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 384       '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"), TWO_DASHES },
 385   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 386       '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 387   { {"stats", no_argument, NULL, OPTION_STATS},
 388       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 389   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 390       '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 391   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 392       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 393   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 394       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 395   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 396       '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"), TWO_DASHES },
 397   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 398       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 399   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 400       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 401   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 402       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 403   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 404       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 405   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 406       '\0', NULL, NULL, NO_HELP },
 407   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 408       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 409   { {"version-exports-section", required_argument, NULL,
 410      OPTION_VERSION_EXPORTS_SECTION },
 411     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n\t\t\t\tSYMBOL as the version."),
 412     TWO_DASHES },
 413   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 414       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 415   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 416       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 417       TWO_DASHES },
 418   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 419       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 420   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 421       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 422   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 423       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 424       TWO_DASHES },
 425   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 426      '\0', NULL, N_("Treat warnings as errors"),
 427      TWO_DASHES },
 428   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 429       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 430   { {"wrap", required_argument, NULL, OPTION_WRAP},
 431       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 432   { {"mpc860c0", optional_argument, NULL, OPTION_MPC860C0},
 433       '\0', N_("[=WORDS]"), N_("Modify problematic branches in last WORDS (1-10,\n\t\t\t\tdefault 5) words of a page"), TWO_DASHES }
 434 };
 435
 436 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 437
 438 /* Test STRING for containing a string of digits that form a number
 439    between MIN and MAX.  The return value is the number or ERR.  */
 440
 441 static int
 442 is_num (const char *string, int min, int max, 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 (unsigned argc, char **argv)
 463 {
 464   unsigned i;
 465   int is, il, irl;
 466   int ingroup = 0;
 467   char *default_dirlist = NULL;
 468   char *shortopts;
 469   struct option *longopts;
 470   struct option *really_longopts;
 471   int last_optind;
 472
 473   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 474   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 475   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 476
 477   /* Starting the short option string with '-' is for programs that
 478      expect options and other ARGV-elements in any order and that care about
 479      the ordering of the two.  We describe each non-option ARGV-element
 480      as if it were the argument of an option with character code 1.  */
 481   shortopts[0] = '-';
 482   is = 1;
 483   il = 0;
 484   irl = 0;
 485   for (i = 0; i < OPTION_COUNT; i++)
 486     {
 487       if (ld_options[i].shortopt != '\0')
 488         {
 489           shortopts[is] = ld_options[i].shortopt;
 490           ++is;
 491           if (ld_options[i].opt.has_arg == required_argument
 492               || ld_options[i].opt.has_arg == optional_argument)
 493             {
 494               shortopts[is] = ':';
 495               ++is;
 496               if (ld_options[i].opt.has_arg == optional_argument)
 497                 {
 498                   shortopts[is] = ':';
 499                   ++is;
 500                 }
 501             }
 502         }
 503       if (ld_options[i].opt.name != NULL)
 504         {
 505           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 506             {
 507               really_longopts[irl] = ld_options[i].opt;
 508               ++irl;
 509             }
 510           else
 511             {
 512               longopts[il] = ld_options[i].opt;
 513               ++il;
 514             }
 515         }
 516     }
 517   shortopts[is] = '\0';
 518   longopts[il].name = NULL;
 519   really_longopts[irl].name = NULL;
 520
 521   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 522
 523   /* The -G option is ambiguous on different platforms.  Sometimes it
 524      specifies the largest data size to put into the small data
 525      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 526      the first form takes an argument, while the second does not.
 527
 528      We need to permit the --shared form because on some platforms,
 529      such as Solaris, gcc -shared will pass -G to the linker.
 530
 531      To permit either usage, we look through the argument list.  If we
 532      find -G not followed by a number, we change it into --shared.
 533      This will work for most normal cases.  */
 534   for (i = 1; i < argc; i++)
 535     if (strcmp (argv[i], "-G") == 0
 536         && (i + 1 >= argc
 537             || ! ISDIGIT (argv[i + 1][0])))
 538       argv[i] = (char *) "--shared";
 539
 540   /* Because we permit long options to start with a single dash, and
 541      we have a --library option, and the -l option is conventionally
 542      used with an immediately following argument, we can have bad
 543      results if somebody tries to use -l with a library whose name
 544      happens to start with "ibrary", as in -li.  We avoid problems by
 545      simply turning -l into --library.  This means that users will
 546      have to use two dashes in order to use --library, which is OK
 547      since that's how it is documented.
 548
 549      FIXME: It's possible that this problem can arise for other short
 550      options as well, although the user does always have the recourse
 551      of adding a space between the option and the argument.  */
 552   for (i = 1; i < argc; i++)
 553     {
 554       if (argv[i][0] == '-'
 555           && argv[i][1] == 'l'
 556           && argv[i][2] != '\0')
 557         {
 558           char *n;
 559
 560           n = xmalloc (strlen (argv[i]) + 20);
 561           sprintf (n, "--library=%s", argv[i] + 2);
 562           argv[i] = n;
 563         }
 564     }
 565
 566   last_optind = -1;
 567   while (1)
 568     {
 569       int longind;
 570       int optc;
 571
 572       /* Using last_optind lets us avoid calling ldemul_parse_args
 573          multiple times on a single option, which would lead to
 574          confusion in the internal static variables maintained by
 575          getopt.  This could otherwise happen for an argument like
 576          -nx, in which the -n is parsed as a single option, and we
 577          loop around to pick up the -x.  */
 578       if (optind != last_optind)
 579         if (ldemul_parse_args (argc, argv))
 580           continue;
 581
 582       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 583          can indicate a long option.  */
 584       opterr = 0;
 585       last_optind = optind;
 586       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 587       if (optc == '?')
 588         {
 589           optind = last_optind;
 590           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 591         }
 592
 593       if (ldemul_handle_option (optc))
 594         continue;
 595
 596       if (optc == -1)
 597         break;
 598
 599       switch (optc)
 600         {
 601         case '?':
 602           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 603         default:
 604           einfo (_("%P%F: use the --help option for usage information\n"));
 605
 606         case 1:                 /* File name.  */
 607           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 608           break;
 609
 610         case OPTION_IGNORE:
 611           break;
 612         case 'a':
 613           /* For HP/UX compatibility.  Actually -a shared should mean
 614              ``use only shared libraries'' but, then, we don't
 615              currently support shared libraries on HP/UX anyhow.  */
 616           if (strcmp (optarg, "archive") == 0)
 617             config.dynamic_link = FALSE;
 618           else if (strcmp (optarg, "shared") == 0
 619                    || strcmp (optarg, "default") == 0)
 620             config.dynamic_link = TRUE;
 621           else
 622             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 623           break;
 624         case OPTION_ASSERT:
 625           /* FIXME: We just ignore these, but we should handle them.  */
 626           if (strcmp (optarg, "definitions") == 0)
 627             ;
 628           else if (strcmp (optarg, "nodefinitions") == 0)
 629             ;
 630           else if (strcmp (optarg, "nosymbolic") == 0)
 631             ;
 632           else if (strcmp (optarg, "pure-text") == 0)
 633             ;
 634           else
 635             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 636           break;
 637         case 'A':
 638           ldfile_add_arch (optarg);
 639           break;
 640         case 'b':
 641           lang_add_target (optarg);
 642           break;
 643         case 'c':
 644           ldfile_open_command_file (optarg);
 645           parser_input = input_mri_script;
 646           yyparse ();
 647           break;
 648         case OPTION_CALL_SHARED:
 649           config.dynamic_link = TRUE;
 650           break;
 651         case OPTION_NON_SHARED:
 652           config.dynamic_link = FALSE;
 653           break;
 654         case OPTION_CREF:
 655           command_line.cref = TRUE;
 656           link_info.notice_all = TRUE;
 657           break;
 658         case 'd':
 659           command_line.force_common_definition = TRUE;
 660           break;
 661         case OPTION_DEFSYM:
 662           lex_string = optarg;
 663           lex_redirect (optarg);
 664           parser_input = input_defsym;
 665           parsing_defsym = 1;
 666           yyparse ();
 667           parsing_defsym = 0;
 668           lex_string = NULL;
 669           break;
 670         case OPTION_DEMANGLE:
 671           demangling = TRUE;
 672           if (optarg != NULL)
 673             {
 674               enum demangling_styles style;
 675
 676               style = cplus_demangle_name_to_style (optarg);
 677               if (style == unknown_demangling)
 678                 einfo (_("%F%P: unknown demangling style `%s'"),
 679                        optarg);
 680
 681               cplus_demangle_set_style (style);
 682             }
 683           break;
 684         case 'I':               /* Used on Solaris.  */
 685         case OPTION_DYNAMIC_LINKER:
 686           command_line.interpreter = optarg;
 687           break;
 688         case OPTION_EB:
 689           command_line.endian = ENDIAN_BIG;
 690           break;
 691         case OPTION_EL:
 692           command_line.endian = ENDIAN_LITTLE;
 693           break;
 694         case OPTION_EMBEDDED_RELOCS:
 695           command_line.embedded_relocs = TRUE;
 696           break;
 697         case OPTION_EXPORT_DYNAMIC:
 698         case 'E': /* HP/UX compatibility.  */
 699           link_info.export_dynamic = TRUE;
 700           break;
 701         case 'e':
 702           lang_add_entry (optarg, TRUE);
 703           break;
 704         case 'f':
 705           if (command_line.auxiliary_filters == NULL)
 706             {
 707               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 708               command_line.auxiliary_filters[0] = optarg;
 709               command_line.auxiliary_filters[1] = NULL;
 710             }
 711           else
 712             {
 713               int c;
 714               char **p;
 715
 716               c = 0;
 717               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 718                 ++c;
 719               command_line.auxiliary_filters
 720                 = xrealloc (command_line.auxiliary_filters,
 721                             (c + 2) * sizeof (char *));
 722               command_line.auxiliary_filters[c] = optarg;
 723               command_line.auxiliary_filters[c + 1] = NULL;
 724             }
 725           break;
 726         case 'F':
 727           command_line.filter_shlib = optarg;
 728           break;
 729         case OPTION_FORCE_EXE_SUFFIX:
 730           command_line.force_exe_suffix = TRUE;
 731           break;
 732         case 'G':
 733           {
 734             char *end;
 735             g_switch_value = strtoul (optarg, &end, 0);
 736             if (*end)
 737               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 738           }
 739           break;
 740         case 'g':
 741           /* Ignore.  */
 742           break;
 743         case OPTION_GC_SECTIONS:
 744           command_line.gc_sections = TRUE;
 745           break;
 746         case OPTION_HELP:
 747           help ();
 748           xexit (0);
 749           break;
 750         case 'L':
 751           ldfile_add_library_path (optarg, TRUE);
 752           break;
 753         case 'l':
 754           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 755           break;
 756         case 'M':
 757           config.map_filename = "-";
 758           break;
 759         case 'm':
 760           /* Ignore.  Was handled in a pre-parse.   */
 761           break;
 762         case OPTION_MAP:
 763           config.map_filename = optarg;
 764           break;
 765         case 'N':
 766           config.text_read_only = FALSE;
 767           config.magic_demand_paged = FALSE;
 768           config.dynamic_link = FALSE;
 769           break;
 770         case OPTION_NO_OMAGIC:
 771           config.text_read_only = TRUE;
 772           config.magic_demand_paged = TRUE;
 773           /* NB/ Does not set dynamic_link to TRUE.
 774              Use --call-shared or -Bdynamic for this.  */
 775           break;
 776         case 'n':
 777           config.magic_demand_paged = FALSE;
 778           config.dynamic_link = FALSE;
 779           break;
 780         case OPTION_NO_DEFINE_COMMON:
 781           command_line.inhibit_common_definition = TRUE;
 782           break;
 783         case OPTION_NO_DEMANGLE:
 784           demangling = FALSE;
 785           break;
 786         case OPTION_NO_GC_SECTIONS:
 787           command_line.gc_sections = FALSE;
 788           break;
 789         case OPTION_NO_KEEP_MEMORY:
 790           link_info.keep_memory = FALSE;
 791           break;
 792         case OPTION_NO_UNDEFINED:
 793           link_info.no_undefined = TRUE;
 794           break;
 795         case OPTION_ALLOW_SHLIB_UNDEFINED:
 796           link_info.allow_shlib_undefined = TRUE;
 797           break;
 798         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 799           link_info.allow_shlib_undefined = FALSE;
 800           break;
 801         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 802           link_info.allow_multiple_definition = TRUE;
 803           break;
 804         case OPTION_NO_UNDEFINED_VERSION:
 805           link_info.allow_undefined_version = FALSE;
 806           break;
 807         case OPTION_NO_WARN_MISMATCH:
 808           command_line.warn_mismatch = FALSE;
 809           break;
 810         case OPTION_NOINHIBIT_EXEC:
 811           force_make_executable = TRUE;
 812           break;
 813         case OPTION_NOSTDLIB:
 814           config.only_cmd_line_lib_dirs = TRUE;
 815           break;
 816         case OPTION_NO_WHOLE_ARCHIVE:
 817           whole_archive = FALSE;
 818           break;
 819         case 'O':
 820           /* FIXME "-O<non-digits> <value>" used to set the address of
 821              section <non-digits>.  Was this for compatibility with
 822              something, or can we create a new option to do that
 823              (with a syntax similar to -defsym)?
 824              getopt can't handle two args to an option without kludges.  */
 825
 826           /* Enable optimizations of output files.  */
 827           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 828           break;
 829         case 'o':
 830           lang_add_output (optarg, 0);
 831           break;
 832         case OPTION_OFORMAT:
 833           lang_add_output_format (optarg, NULL, NULL, 0);
 834           break;
 835         case 'q':
 836           link_info.emitrelocations = TRUE;
 837           break;
 838         case 'i':
 839         case 'r':
 840           if (optind == last_optind)
 841             /* This can happen if the user put "-rpath,a" on the command
 842                line.  (Or something similar.  The comma is important).
 843                Getopt becomes confused and thinks that this is a -r option
 844                but it cannot parse the text after the -r so it refuses to
 845                increment the optind counter.  Detect this case and issue
 846                an error message here.  We cannot just make this a warning,
 847                increment optind, and continue because getopt is too confused
 848                and will seg-fault the next time around.  */
 849             einfo(_("%P%F: bad -rpath option\n"));
 850
 851           link_info.relocatable = TRUE;
 852           config.build_constructors = FALSE;
 853           config.magic_demand_paged = FALSE;
 854           config.text_read_only = FALSE;
 855           config.dynamic_link = FALSE;
 856           break;
 857         case 'R':
 858           /* The GNU linker traditionally uses -R to mean to include
 859              only the symbols from a file.  The Solaris linker uses -R
 860              to set the path used by the runtime linker to find
 861              libraries.  This is the GNU linker -rpath argument.  We
 862              try to support both simultaneously by checking the file
 863              named.  If it is a directory, rather than a regular file,
 864              we assume -rpath was meant.  */
 865           {
 866             struct stat s;
 867
 868             if (stat (optarg, &s) >= 0
 869                 && ! S_ISDIR (s.st_mode))
 870               {
 871                 lang_add_input_file (optarg,
 872                                      lang_input_file_is_symbols_only_enum,
 873                                      NULL);
 874                 break;
 875               }
 876           }
 877           /* Fall through.  */
 878         case OPTION_RPATH:
 879           if (command_line.rpath == NULL)
 880             command_line.rpath = xstrdup (optarg);
 881           else
 882             {
 883               size_t rpath_len = strlen (command_line.rpath);
 884               size_t optarg_len = strlen (optarg);
 885               char *buf;
 886               char *cp = command_line.rpath;
 887
 888               /* First see whether OPTARG is already in the path.  */
 889               do
 890                 {
 891                   size_t idx = 0;
 892
 893                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 894                     ++idx;
 895                   if (optarg[idx] == '\0'
 896                       && (cp[idx] == '\0' || cp[idx] == ':'))
 897                     /* We found it.  */
 898                     break;
 899
 900                   /* Not yet found.  */
 901                   cp = strchr (cp, ':');
 902                   if (cp != NULL)
 903                     ++cp;
 904                 }
 905               while (cp != NULL);
 906
 907               if (cp == NULL)
 908                 {
 909                   buf = xmalloc (rpath_len + optarg_len + 2);
 910                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
 911                   free (command_line.rpath);
 912                   command_line.rpath = buf;
 913                 }
 914             }
 915           break;
 916         case OPTION_RPATH_LINK:
 917           if (command_line.rpath_link == NULL)
 918             command_line.rpath_link = xstrdup (optarg);
 919           else
 920             {
 921               char *buf;
 922
 923               buf = xmalloc (strlen (command_line.rpath_link)
 924                              + strlen (optarg)
 925                              + 2);
 926               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 927               free (command_line.rpath_link);
 928               command_line.rpath_link = buf;
 929             }
 930           break;
 931         case OPTION_RELAX:
 932           command_line.relax = TRUE;
 933           break;
 934         case OPTION_RETAIN_SYMBOLS_FILE:
 935           add_keepsyms_file (optarg);
 936           break;
 937         case 'S':
 938           link_info.strip = strip_debugger;
 939           break;
 940         case 's':
 941           link_info.strip = strip_all;
 942           break;
 943         case OPTION_STRIP_DISCARDED:
 944           link_info.strip_discarded = TRUE;
 945           break;
 946         case OPTION_NO_STRIP_DISCARDED:
 947           link_info.strip_discarded = FALSE;
 948           break;
 949         case OPTION_SHARED:
 950           if (config.has_shared)
 951             link_info.shared = TRUE;
 952           else
 953             einfo (_("%P%F: -shared not supported\n"));
 954           break;
 955         case OPTION_PIE:
 956           if (config.has_shared)
 957             {
 958               link_info.shared = TRUE;
 959               link_info.pie = TRUE;
 960             }
 961           else
 962             einfo (_("%P%F: -pie not supported\n"));
 963           break;
 964         case 'h':               /* Used on Solaris.  */
 965         case OPTION_SONAME:
 966           command_line.soname = optarg;
 967           break;
 968         case OPTION_SORT_COMMON:
 969           config.sort_common = TRUE;
 970           break;
 971         case OPTION_STATS:
 972           config.stats = TRUE;
 973           break;
 974         case OPTION_SYMBOLIC:
 975           link_info.symbolic = TRUE;
 976           break;
 977         case 't':
 978           trace_files = TRUE;
 979           break;
 980         case 'T':
 981           ldfile_open_command_file (optarg);
 982           parser_input = input_script;
 983           yyparse ();
 984           break;
 985         case OPTION_SECTION_START:
 986           {
 987             char *optarg2;
 988             char *sec_name;
 989             int len;
 990
 991             /* Check for <something>=<somthing>...  */
 992             optarg2 = strchr (optarg, '=');
 993             if (optarg2 == NULL)
 994               einfo (_("%P%F: invalid argument to option \"--section-start\"\n"));
 995
 996             optarg2++;
 997
 998             /* So far so good.  Are all the args present?  */
 999             if ((*optarg == '\0') || (*optarg2 == '\0'))
1000               einfo (_("%P%F: missing argument(s) to option \"--section-start\"\n"));
1001
1002             /* We must copy the section name as set_section_start
1003                doesn't do it for us.  */
1004             len = optarg2 - optarg;
1005             sec_name = xmalloc (len);
1006             memcpy (sec_name, optarg, len - 1);
1007             sec_name[len - 1] = 0;
1008
1009             /* Then set it...  */
1010             set_section_start (sec_name, optarg2);
1011           }
1012           break;
1013         case OPTION_TARGET_HELP:
1014           /* Mention any target specific options.  */
1015           ldemul_list_emulation_options (stdout);
1016           exit (0);
1017         case OPTION_TBSS:
1018           set_section_start (".bss", optarg);
1019           break;
1020         case OPTION_TDATA:
1021           set_section_start (".data", optarg);
1022           break;
1023         case OPTION_TTEXT:
1024           set_section_start (".text", optarg);
1025           break;
1026         case OPTION_TRADITIONAL_FORMAT:
1027           link_info.traditional_format = TRUE;
1028           break;
1029         case OPTION_TASK_LINK:
1030           link_info.task_link = TRUE;
1031           /* Fall through - do an implied -r option.  */
1032         case OPTION_UR:
1033           link_info.relocatable = TRUE;
1034           config.build_constructors = TRUE;
1035           config.magic_demand_paged = FALSE;
1036           config.text_read_only = FALSE;
1037           config.dynamic_link = FALSE;
1038           break;
1039         case 'u':
1040           ldlang_add_undef (optarg);
1041           break;
1042         case OPTION_UNIQUE:
1043           if (optarg != NULL)
1044             lang_add_unique (optarg);
1045           else
1046             config.unique_orphan_sections = TRUE;
1047           break;
1048         case OPTION_VERBOSE:
1049           ldversion (1);
1050           version_printed = TRUE;
1051           trace_file_tries = TRUE;
1052           overflow_cutoff_limit = -2;
1053           break;
1054         case 'v':
1055           ldversion (0);
1056           version_printed = TRUE;
1057           break;
1058         case 'V':
1059           ldversion (1);
1060           version_printed = TRUE;
1061           break;
1062         case OPTION_VERSION:
1063           ldversion (2);
1064           xexit (0);
1065           break;
1066         case OPTION_VERSION_SCRIPT:
1067           /* This option indicates a small script that only specifies
1068              version information.  Read it, but don't assume that
1069              we've seen a linker script.  */
1070           {
1071             FILE *hold_script_handle;
1072
1073             hold_script_handle = saved_script_handle;
1074             ldfile_open_command_file (optarg);
1075             saved_script_handle = hold_script_handle;
1076             parser_input = input_version_script;
1077             yyparse ();
1078           }
1079           break;
1080         case OPTION_VERSION_EXPORTS_SECTION:
1081           /* This option records a version symbol to be applied to the
1082              symbols listed for export to be found in the object files
1083              .exports sections.  */
1084           command_line.version_exports_section = optarg;
1085           break;
1086         case OPTION_WARN_COMMON:
1087           config.warn_common = TRUE;
1088           break;
1089         case OPTION_WARN_CONSTRUCTORS:
1090           config.warn_constructors = TRUE;
1091           break;
1092         case OPTION_WARN_FATAL:
1093           config.fatal_warnings = TRUE;
1094           break;
1095         case OPTION_WARN_MULTIPLE_GP:
1096           config.warn_multiple_gp = TRUE;
1097           break;
1098         case OPTION_WARN_ONCE:
1099           config.warn_once = TRUE;
1100           break;
1101         case OPTION_WARN_SECTION_ALIGN:
1102           config.warn_section_align = TRUE;
1103           break;
1104         case OPTION_WHOLE_ARCHIVE:
1105           whole_archive = TRUE;
1106           break;
1107         case OPTION_WRAP:
1108           add_wrap (optarg);
1109           break;
1110         case OPTION_DISCARD_NONE:
1111           link_info.discard = discard_none;
1112           break;
1113         case 'X':
1114           link_info.discard = discard_l;
1115           break;
1116         case 'x':
1117           link_info.discard = discard_all;
1118           break;
1119         case 'Y':
1120           if (strncmp (optarg, "P,", 2) == 0)
1121             optarg += 2;
1122           if (default_dirlist != NULL)
1123             free (default_dirlist);
1124           default_dirlist = xstrdup (optarg);
1125           break;
1126         case 'y':
1127           add_ysym (optarg);
1128           break;
1129         case OPTION_SPARE_DYNAMIC_TAGS:
1130           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1131           break;
1132         case OPTION_SPLIT_BY_RELOC:
1133           if (optarg != NULL)
1134             config.split_by_reloc = strtoul (optarg, NULL, 0);
1135           else
1136             config.split_by_reloc = 32768;
1137           break;
1138         case OPTION_SPLIT_BY_FILE:
1139           if (optarg != NULL)
1140             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1141           else
1142             config.split_by_file = 1;
1143           break;
1144         case OPTION_CHECK_SECTIONS:
1145           command_line.check_section_addresses = TRUE;
1146           break;
1147         case OPTION_NO_CHECK_SECTIONS:
1148           command_line.check_section_addresses = FALSE;
1149           break;
1150         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1151           command_line.accept_unknown_input_arch = TRUE;
1152           break;
1153         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1154           command_line.accept_unknown_input_arch = FALSE;
1155           break;
1156         case '(':
1157           if (ingroup)
1158             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1159
1160           lang_enter_group ();
1161           ingroup = 1;
1162           break;
1163         case ')':
1164           if (! ingroup)
1165             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1166
1167           lang_leave_group ();
1168           ingroup = 0;
1169           break;
1170         case OPTION_MPC860C0:
1171           /* Default value (in bytes).  */
1172           link_info.mpc860c0 = 20;
1173           if (optarg)
1174             {
1175               unsigned words;
1176
1177               words = is_num (optarg, 1, 10, 0);
1178               if (words == 0)
1179                 einfo (_("%P%F: invalid argument to option \"mpc860c0\"\n"));
1180
1181               /* Convert words to bytes.  */
1182               link_info.mpc860c0 = words * 4;
1183             }
1184           command_line.relax = TRUE;
1185           break;
1186
1187         case OPTION_INIT:
1188           link_info.init_function = optarg;
1189           break;
1190
1191         case OPTION_FINI:
1192           link_info.fini_function = optarg;
1193           break;
1194         }
1195     }
1196
1197   if (ingroup)
1198     lang_leave_group ();
1199
1200   if (default_dirlist != NULL)
1201     {
1202       set_default_dirlist (default_dirlist);
1203       free (default_dirlist);
1204     }
1205 }
1206
1207 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1208    library search path.  */
1209
1210 static void
1211 set_default_dirlist (char *dirlist_ptr)
1212 {
1213   char *p;
1214
1215   while (1)
1216     {
1217       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1218       if (p != NULL)
1219         *p = '\0';
1220       if (*dirlist_ptr != '\0')
1221         ldfile_add_library_path (dirlist_ptr, TRUE);
1222       if (p == NULL)
1223         break;
1224       dirlist_ptr = p + 1;
1225     }
1226 }
1227
1228 static void
1229 set_section_start (char *sect, char *valstr)
1230 {
1231   const char *end;
1232   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1233   if (*end)
1234     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1235   lang_section_start (sect, exp_intop (val));
1236 }
1237 \f
1238 /* Print help messages for the options.  */
1239
1240 static void
1241 help (void)
1242 {
1243   unsigned i;
1244   const char **targets, **pp;
1245
1246   printf (_("Usage: %s [options] file...\n"), program_name);
1247
1248   printf (_("Options:\n"));
1249   for (i = 0; i < OPTION_COUNT; i++)
1250     {
1251       if (ld_options[i].doc != NULL)
1252         {
1253           bfd_boolean comma;
1254           int len;
1255           unsigned j;
1256
1257           printf ("  ");
1258
1259           comma = FALSE;
1260           len = 2;
1261
1262           j = i;
1263           do
1264             {
1265               if (ld_options[j].shortopt != '\0'
1266                   && ld_options[j].control != NO_HELP)
1267                 {
1268                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1269                   len += (comma ? 2 : 0) + 2;
1270                   if (ld_options[j].arg != NULL)
1271                     {
1272                       if (ld_options[j].opt.has_arg != optional_argument)
1273                         {
1274                           printf (" ");
1275                           ++len;
1276                         }
1277                       printf ("%s", _(ld_options[j].arg));
1278                       len += strlen (_(ld_options[j].arg));
1279                     }
1280                   comma = TRUE;
1281                 }
1282               ++j;
1283             }
1284           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1285
1286           j = i;
1287           do
1288             {
1289               if (ld_options[j].opt.name != NULL
1290                   && ld_options[j].control != NO_HELP)
1291                 {
1292                   int two_dashes =
1293                     (ld_options[j].control == TWO_DASHES
1294                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1295
1296                   printf ("%s-%s%s",
1297                           comma ? ", " : "",
1298                           two_dashes ? "-" : "",
1299                           ld_options[j].opt.name);
1300                   len += ((comma ? 2 : 0)
1301                           + 1
1302                           + (two_dashes ? 1 : 0)
1303                           + strlen (ld_options[j].opt.name));
1304                   if (ld_options[j].arg != NULL)
1305                     {
1306                       printf (" %s", _(ld_options[j].arg));
1307                       len += 1 + strlen (_(ld_options[j].arg));
1308                     }
1309                   comma = TRUE;
1310                 }
1311               ++j;
1312             }
1313           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1314
1315           if (len >= 30)
1316             {
1317               printf ("\n");
1318               len = 0;
1319             }
1320
1321           for (; len < 30; len++)
1322             putchar (' ');
1323
1324           printf ("%s\n", _(ld_options[i].doc));
1325         }
1326     }
1327
1328   /* Note: Various tools (such as libtool) depend upon the
1329      format of the listings below - do not change them.  */
1330   /* xgettext:c-format */
1331   printf (_("%s: supported targets:"), program_name);
1332   targets = bfd_target_list ();
1333   for (pp = targets; *pp != NULL; pp++)
1334     printf (" %s", *pp);
1335   free (targets);
1336   printf ("\n");
1337
1338   /* xgettext:c-format */
1339   printf (_("%s: supported emulations: "), program_name);
1340   ldemul_list_emulations (stdout);
1341   printf ("\n");
1342
1343   /* xgettext:c-format */
1344   printf (_("%s: emulation specific options:\n"), program_name);
1345   ldemul_list_emulation_options (stdout);
1346   printf ("\n");
1347
1348   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1349 }