ld/lexsup.c

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