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