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