ld/lexsup.c

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