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