toolchain/binutils/ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libiberty.h"
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "safe-ctype.h"
  29 #include "getopt.h"
  30 #include "bfdlink.h"
  31 #include "ld.h"
  32 #include "ldmain.h"
  33 #include "ldmisc.h"
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include <ldgram.h>
  37 #include "ldlex.h"
  38 #include "ldfile.h"
  39 #include "ldver.h"
  40 #include "ldemul.h"
  41 #include "demangle.h"
  42
  43 #ifndef PATH_SEPARATOR
  44 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  45 #define PATH_SEPARATOR ';'
  46 #else
  47 #define PATH_SEPARATOR ':'
  48 #endif
  49 #endif
  50
  51 /* Somewhere above, sys/stat.h got included . . . .  */
  52 #if !defined(S_ISDIR) && defined(S_IFDIR)
  53 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  54 #endif
  55
  56 static void set_default_dirlist (char *);
  57 static void set_section_start (char *, char *);
  58 static void help (void);
  59
  60 /* Non-zero if we are processing a --defsym from the command line.  */
  61 int parsing_defsym = 0;
  62
  63 /* Codes used for the long options with no short synonyms.  150 isn't
  64    special; it's just an arbitrary non-ASCII char value.  */
  65 enum option_values
  66 {
  67   OPTION_ASSERT = 150,
  68   OPTION_CALL_SHARED,
  69   OPTION_CREF,
  70   OPTION_DEFSYM,
  71   OPTION_DEMANGLE,
  72   OPTION_DYNAMIC_LINKER,
  73   OPTION_EB,
  74   OPTION_EL,
  75   OPTION_EMBEDDED_RELOCS,
  76   OPTION_EXPORT_DYNAMIC,
  77   OPTION_HELP,
  78   OPTION_IGNORE,
  79   OPTION_MAP,
  80   OPTION_NO_DEMANGLE,
  81   OPTION_NO_KEEP_MEMORY,
  82   OPTION_NO_WARN_MISMATCH,
  83   OPTION_NOINHIBIT_EXEC,
  84   OPTION_NON_SHARED,
  85   OPTION_NO_WHOLE_ARCHIVE,
  86   OPTION_OFORMAT,
  87   OPTION_RELAX,
  88   OPTION_RETAIN_SYMBOLS_FILE,
  89   OPTION_RPATH,
  90   OPTION_RPATH_LINK,
  91   OPTION_SHARED,
  92   OPTION_SONAME,
  93   OPTION_SORT_COMMON,
  94   OPTION_STATS,
  95   OPTION_SYMBOLIC,
  96   OPTION_TASK_LINK,
  97   OPTION_TBSS,
  98   OPTION_TDATA,
  99   OPTION_TTEXT,
 100   OPTION_TRADITIONAL_FORMAT,
 101   OPTION_UR,
 102   OPTION_VERBOSE,
 103   OPTION_VERSION,
 104   OPTION_VERSION_SCRIPT,
 105   OPTION_VERSION_EXPORTS_SECTION,
 106   OPTION_WARN_COMMON,
 107   OPTION_WARN_CONSTRUCTORS,
 108   OPTION_WARN_FATAL,
 109   OPTION_WARN_MULTIPLE_GP,
 110   OPTION_WARN_ONCE,
 111   OPTION_WARN_SECTION_ALIGN,
 112   OPTION_SPLIT_BY_RELOC,
 113   OPTION_SPLIT_BY_FILE ,
 114   OPTION_WHOLE_ARCHIVE,
 115   OPTION_AS_NEEDED,
 116   OPTION_NO_AS_NEEDED,
 117   OPTION_WRAP,
 118   OPTION_FORCE_EXE_SUFFIX,
 119   OPTION_GC_SECTIONS,
 120   OPTION_NO_GC_SECTIONS,
 121   OPTION_CHECK_SECTIONS,
 122   OPTION_NO_CHECK_SECTIONS,
 123   OPTION_NO_UNDEFINED,
 124   OPTION_INIT,
 125   OPTION_FINI,
 126   OPTION_SECTION_START,
 127   OPTION_UNIQUE,
 128   OPTION_TARGET_HELP,
 129   OPTION_ALLOW_SHLIB_UNDEFINED,
 130   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 131   OPTION_ALLOW_MULTIPLE_DEFINITION,
 132   OPTION_NO_UNDEFINED_VERSION,
 133   OPTION_DISCARD_NONE,
 134   OPTION_SPARE_DYNAMIC_TAGS,
 135   OPTION_NO_DEFINE_COMMON,
 136   OPTION_NOSTDLIB,
 137   OPTION_NO_OMAGIC,
 138   OPTION_STRIP_DISCARDED,
 139   OPTION_NO_STRIP_DISCARDED,
 140   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 141   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 142   OPTION_PIE,
 143   OPTION_UNRESOLVED_SYMBOLS,
 144   OPTION_WARN_UNRESOLVED_SYMBOLS,
 145   OPTION_ERROR_UNRESOLVED_SYMBOLS
 146 };
 147
 148 /* The long options.  This structure is used for both the option
 149    parsing and the help text.  */
 150
 151 struct ld_option
 152 {
 153   /* The long option information.  */
 154   struct option opt;
 155   /* The short option with the same meaning ('\0' if none).  */
 156   char shortopt;
 157   /* The name of the argument (NULL if none).  */
 158   const char *arg;
 159   /* The documentation string.  If this is NULL, this is a synonym for
 160      the previous option.  */
 161   const char *doc;
 162   enum {
 163     /* Use one dash before long option name.  */
 164     ONE_DASH,
 165     /* Use two dashes before long option name.  */
 166     TWO_DASHES,
 167     /* Only accept two dashes before the long option name.
 168        This is an overloading of the use of this enum, since originally it
 169        was only intended to tell the --help display function how to display
 170        the long option name.  This feature was added in order to resolve
 171        the confusion about the -omagic command line switch.  Is it setting
 172        the output file name to "magic" or is it setting the NMAGIC flag on
 173        the output ?  It has been decided that it is setting the output file
 174        name, and that if you want to set the NMAGIC flag you should use -N
 175        or --omagic.  */
 176     EXACTLY_TWO_DASHES,
 177     /* Don't mention this option in --help output.  */
 178     NO_HELP
 179   } control;
 180 };
 181
 182 static const struct ld_option ld_options[] =
 183 {
 184   { {NULL, required_argument, NULL, '\0'},
 185       'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 186       ONE_DASH },
 187   { {"architecture", required_argument, NULL, 'A'},
 188       'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 189   { {"format", required_argument, NULL, 'b'},
 190       'b', N_("TARGET"), N_("Specify target for following input files"), TWO_DASHES },
 191   { {"mri-script", required_argument, NULL, 'c'},
 192       'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 193   { {"dc", no_argument, NULL, 'd'},
 194       'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 195   { {"dp", no_argument, NULL, 'd'},
 196       '\0', NULL, NULL, ONE_DASH },
 197   { {"entry", required_argument, NULL, 'e'},
 198       'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 199   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 200       'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 201   { {"EB", no_argument, NULL, OPTION_EB},
 202       '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 203   { {"EL", no_argument, NULL, OPTION_EL},
 204       '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 205   { {"auxiliary", required_argument, NULL, 'f'},
 206       'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 207       TWO_DASHES },
 208   { {"filter", required_argument, NULL, 'F'},
 209       'F', N_("SHLIB"), N_("Filter for shared object symbol table"), TWO_DASHES },
 210   { {NULL, no_argument, NULL, '\0'},
 211       'g', NULL, N_("Ignored"), ONE_DASH },
 212   { {"gpsize", required_argument, NULL, 'G'},
 213       'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 214       TWO_DASHES },
 215   { {"soname", required_argument, NULL, OPTION_SONAME},
 216       'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 217   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 218       'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"), TWO_DASHES },
 219   { {"library", required_argument, NULL, 'l'},
 220       'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 221   { {"library-path", required_argument, NULL, 'L'},
 222       'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"), TWO_DASHES },
 223   { {NULL, required_argument, NULL, '\0'},
 224       'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 225   { {"print-map", no_argument, NULL, 'M'},
 226       'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 227   { {"nmagic", no_argument, NULL, 'n'},
 228       'n', NULL, N_("Do not page align data"), TWO_DASHES },
 229   { {"omagic", no_argument, NULL, 'N'},
 230       'N', NULL, N_("Do not page align data, do not make text readonly"),
 231       EXACTLY_TWO_DASHES },
 232   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 233       '\0', NULL, N_("Page align data, make text readonly"), EXACTLY_TWO_DASHES },
 234   { {"output", required_argument, NULL, 'o'},
 235       'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 236   { {NULL, required_argument, NULL, '\0'},
 237       'O', NULL, N_("Optimize output file"), ONE_DASH },
 238   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 239       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 240   { {"emit-relocs", no_argument, NULL, 'q'},
 241       'q', NULL, "Generate relocations in final output", TWO_DASHES },
 242   { {"relocatable", no_argument, NULL, 'r'},
 243       'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 244   { {NULL, no_argument, NULL, '\0'},
 245       'i', NULL, NULL, ONE_DASH },
 246   { {"just-symbols", required_argument, NULL, 'R'},
 247       'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 248       TWO_DASHES },
 249   { {"strip-all", no_argument, NULL, 's'},
 250       's', NULL, N_("Strip all symbols"), TWO_DASHES },
 251   { {"strip-debug", no_argument, NULL, 'S'},
 252       'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 253   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 254       '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 255   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 256       '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 257   { {"trace", no_argument, NULL, 't'},
 258       't', NULL, N_("Trace file opens"), TWO_DASHES },
 259   { {"script", required_argument, NULL, 'T'},
 260       'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 261   { {"undefined", required_argument, NULL, 'u'},
 262       'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES },
 263   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 264       '\0', N_("[=SECTION]"), N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 265   { {"Ur", no_argument, NULL, OPTION_UR},
 266       '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 267   { {"version", no_argument, NULL, OPTION_VERSION},
 268       'v', NULL, N_("Print version information"), TWO_DASHES },
 269   { {NULL, no_argument, NULL, '\0'},
 270       'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 271   { {"discard-all", no_argument, NULL, 'x'},
 272       'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 273   { {"discard-locals", no_argument, NULL, 'X'},
 274       'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 275   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 276       '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 277   { {"trace-symbol", required_argument, NULL, 'y'},
 278       'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 279   { {NULL, required_argument, NULL, '\0'},
 280       'Y', N_("PATH"), N_("Default search path for Solaris compatibility"), ONE_DASH },
 281   { {"start-group", no_argument, NULL, '('},
 282       '(', NULL, N_("Start a group"), TWO_DASHES },
 283   { {"end-group", no_argument, NULL, ')'},
 284       ')', NULL, N_("End a group"), TWO_DASHES },
 285   { {"accept-unknown-input-arch", no_argument, NULL, OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 286     '\0', NULL, N_("Accept input files whose architecture cannot be determined"), TWO_DASHES },
 287   { {"no-accept-unknown-input-arch", no_argument, NULL, OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 288     '\0', NULL, N_("Reject input files whose architecture is unknown"), TWO_DASHES },
 289   { {"assert", required_argument, NULL, OPTION_ASSERT},
 290       '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 291   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 292       '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 293   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 294       '\0', NULL, NULL, ONE_DASH },
 295   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 296       '\0', NULL, NULL, ONE_DASH },
 297   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 298       '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 299   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 300       '\0', NULL, NULL, ONE_DASH },
 301   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 302       '\0', NULL, NULL, ONE_DASH },
 303   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 304       '\0', NULL, NULL, ONE_DASH },
 305   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 306       '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 307   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 308       '\0', NULL, N_("Check section addresses for overlaps (default)"), TWO_DASHES },
 309   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 310       '\0', NULL, N_("Do not check section addresses for overlaps"),
 311       TWO_DASHES },
 312   { {"cref", no_argument, NULL, OPTION_CREF},
 313       '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 314   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 315       '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 316   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 317       '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"), TWO_DASHES },
 318   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 319       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 320   { {"fini", required_argument, NULL, OPTION_FINI},
 321      '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 322   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 323       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 324   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 325       '\0', NULL, N_("Remove unused sections (on some targets)"),
 326       TWO_DASHES },
 327   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 328       '\0', NULL, N_("Don't remove unused sections (default)"),
 329       TWO_DASHES },
 330   { {"help", no_argument, NULL, OPTION_HELP},
 331       '\0', NULL, N_("Print option help"), TWO_DASHES },
 332   { {"init", required_argument, NULL, OPTION_INIT},
 333      '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 334   { {"Map", required_argument, NULL, OPTION_MAP},
 335       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 336   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 337       '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 338   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 339       '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 340   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 341       '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 342   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 343      '\0', NULL, N_("Do not allow unresolved references in object files"), TWO_DASHES },
 344   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 345      '\0', NULL, N_("Allow unresolved references in shared libaries"), TWO_DASHES },
 346   { {"no-allow-shlib-undefined", no_argument, NULL, OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 347      '\0', NULL, N_("Do not allow unresolved references in shared libs"), TWO_DASHES },
 348   { {"allow-multiple-definition", no_argument, NULL, OPTION_ALLOW_MULTIPLE_DEFINITION},
 349      '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 350   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 351      '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 352   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 353       '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 354   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 355       '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 356   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 357       '\0', NULL, N_("Create an output file even if errors occur"), TWO_DASHES },
 358   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 359       '\0', NULL, NULL, NO_HELP },
 360   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 361       '\0', NULL, N_("Only use library directories specified on\n\t\t\t\tthe command line"), ONE_DASH },
 362   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 363       '\0', N_("TARGET"), N_("Specify target of output file"), EXACTLY_TWO_DASHES },
 364   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 365       '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 366   { {"relax", no_argument, NULL, OPTION_RELAX},
 367       '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 368   { {"retain-symbols-file", required_argument, NULL,
 369        OPTION_RETAIN_SYMBOLS_FILE},
 370       '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 371   { {"rpath", required_argument, NULL, OPTION_RPATH},
 372       '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 373   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 374       '\0', N_("PATH"), N_("Set link time shared library search path"), ONE_DASH },
 375   { {"shared", no_argument, NULL, OPTION_SHARED},
 376       '\0', NULL, N_("Create a shared library"), ONE_DASH },
 377   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 378       '\0', NULL, NULL, ONE_DASH },
 379   { {"pie", no_argument, NULL, OPTION_PIE},
 380       '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 381   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 382       '\0', NULL, NULL, TWO_DASHES },
 383   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 384       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 385   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 386       '\0', NULL, NULL, NO_HELP },
 387   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 388       '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"), TWO_DASHES },
 389   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 390       '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"), TWO_DASHES },
 391   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 392       '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 393   { {"stats", no_argument, NULL, OPTION_STATS},
 394       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 395   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 396       '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 397   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 398       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 399   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 400       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 401   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 402       '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"), TWO_DASHES },
 403   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 404       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 405   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 406       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 407   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 408       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 409   { {"unresolved-symbols=<method>", required_argument, NULL, OPTION_UNRESOLVED_SYMBOLS},
 410      '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n\t\t\t\tignore-all, report-all, ignore-in-object-files,\n\t\t\t\tignore-in-shared-libs"),
 411     TWO_DASHES },
 412   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 413       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 414   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 415       '\0', NULL, NULL, NO_HELP },
 416   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 417       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 418   { {"version-exports-section", required_argument, NULL,
 419      OPTION_VERSION_EXPORTS_SECTION },
 420     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n\t\t\t\tSYMBOL as the version."),
 421     TWO_DASHES },
 422   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 423       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 424   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 425       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 426       TWO_DASHES },
 427   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 428       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 429   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 430       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 431   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 432       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 433       TWO_DASHES },
 434   { {"warn-unresolved-symbols", no_argument, NULL, OPTION_WARN_UNRESOLVED_SYMBOLS},
 435     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 436   { {"error-unresolved-symbols", no_argument, NULL, OPTION_ERROR_UNRESOLVED_SYMBOLS},
 437     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 438   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 439      '\0', NULL, N_("Treat warnings as errors"),
 440      TWO_DASHES },
 441   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 442       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 443   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 444       '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"), TWO_DASHES },
 445   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 446       '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"), TWO_DASHES },
 447   { {"wrap", required_argument, NULL, OPTION_WRAP},
 448       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES }
 449 };
 450
 451 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 452
 453 void
 454 parse_args (unsigned argc, char **argv)
 455 {
 456   unsigned i;
 457   int is, il, irl;
 458   int ingroup = 0;
 459   char *default_dirlist = NULL;
 460   char *shortopts;
 461   struct option *longopts;
 462   struct option *really_longopts;
 463   int last_optind;
 464   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 465
 466   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 467   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 468   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 469
 470   /* Starting the short option string with '-' is for programs that
 471      expect options and other ARGV-elements in any order and that care about
 472      the ordering of the two.  We describe each non-option ARGV-element
 473      as if it were the argument of an option with character code 1.  */
 474   shortopts[0] = '-';
 475   is = 1;
 476   il = 0;
 477   irl = 0;
 478   for (i = 0; i < OPTION_COUNT; i++)
 479     {
 480       if (ld_options[i].shortopt != '\0')
 481         {
 482           shortopts[is] = ld_options[i].shortopt;
 483           ++is;
 484           if (ld_options[i].opt.has_arg == required_argument
 485               || ld_options[i].opt.has_arg == optional_argument)
 486             {
 487               shortopts[is] = ':';
 488               ++is;
 489               if (ld_options[i].opt.has_arg == optional_argument)
 490                 {
 491                   shortopts[is] = ':';
 492                   ++is;
 493                 }
 494             }
 495         }
 496       if (ld_options[i].opt.name != NULL)
 497         {
 498           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 499             {
 500               really_longopts[irl] = ld_options[i].opt;
 501               ++irl;
 502             }
 503           else
 504             {
 505               longopts[il] = ld_options[i].opt;
 506               ++il;
 507             }
 508         }
 509     }
 510   shortopts[is] = '\0';
 511   longopts[il].name = NULL;
 512   really_longopts[irl].name = NULL;
 513
 514   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 515
 516   /* The -G option is ambiguous on different platforms.  Sometimes it
 517      specifies the largest data size to put into the small data
 518      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 519      the first form takes an argument, while the second does not.
 520
 521      We need to permit the --shared form because on some platforms,
 522      such as Solaris, gcc -shared will pass -G to the linker.
 523
 524      To permit either usage, we look through the argument list.  If we
 525      find -G not followed by a number, we change it into --shared.
 526      This will work for most normal cases.  */
 527   for (i = 1; i < argc; i++)
 528     if (strcmp (argv[i], "-G") == 0
 529         && (i + 1 >= argc
 530             || ! ISDIGIT (argv[i + 1][0])))
 531       argv[i] = (char *) "--shared";
 532
 533   /* Because we permit long options to start with a single dash, and
 534      we have a --library option, and the -l option is conventionally
 535      used with an immediately following argument, we can have bad
 536      results if somebody tries to use -l with a library whose name
 537      happens to start with "ibrary", as in -li.  We avoid problems by
 538      simply turning -l into --library.  This means that users will
 539      have to use two dashes in order to use --library, which is OK
 540      since that's how it is documented.
 541
 542      FIXME: It's possible that this problem can arise for other short
 543      options as well, although the user does always have the recourse
 544      of adding a space between the option and the argument.  */
 545   for (i = 1; i < argc; i++)
 546     {
 547       if (argv[i][0] == '-'
 548           && argv[i][1] == 'l'
 549           && argv[i][2] != '\0')
 550         {
 551           char *n;
 552
 553           n = xmalloc (strlen (argv[i]) + 20);
 554           sprintf (n, "--library=%s", argv[i] + 2);
 555           argv[i] = n;
 556         }
 557     }
 558
 559   last_optind = -1;
 560   while (1)
 561     {
 562       int longind;
 563       int optc;
 564
 565       /* Using last_optind lets us avoid calling ldemul_parse_args
 566          multiple times on a single option, which would lead to
 567          confusion in the internal static variables maintained by
 568          getopt.  This could otherwise happen for an argument like
 569          -nx, in which the -n is parsed as a single option, and we
 570          loop around to pick up the -x.  */
 571       if (optind != last_optind)
 572         if (ldemul_parse_args (argc, argv))
 573           continue;
 574
 575       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 576          can indicate a long option.  */
 577       opterr = 0;
 578       last_optind = optind;
 579       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 580       if (optc == '?')
 581         {
 582           optind = last_optind;
 583           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 584         }
 585
 586       if (ldemul_handle_option (optc))
 587         continue;
 588
 589       if (optc == -1)
 590         break;
 591
 592       switch (optc)
 593         {
 594         case '?':
 595           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 596         default:
 597           einfo (_("%P%F: use the --help option for usage information\n"));
 598
 599         case 1:                 /* File name.  */
 600           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 601           break;
 602
 603         case OPTION_IGNORE:
 604           break;
 605         case 'a':
 606           /* For HP/UX compatibility.  Actually -a shared should mean
 607              ``use only shared libraries'' but, then, we don't
 608              currently support shared libraries on HP/UX anyhow.  */
 609           if (strcmp (optarg, "archive") == 0)
 610             config.dynamic_link = FALSE;
 611           else if (strcmp (optarg, "shared") == 0
 612                    || strcmp (optarg, "default") == 0)
 613             config.dynamic_link = TRUE;
 614           else
 615             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 616           break;
 617         case OPTION_ASSERT:
 618           /* FIXME: We just ignore these, but we should handle them.  */
 619           if (strcmp (optarg, "definitions") == 0)
 620             ;
 621           else if (strcmp (optarg, "nodefinitions") == 0)
 622             ;
 623           else if (strcmp (optarg, "nosymbolic") == 0)
 624             ;
 625           else if (strcmp (optarg, "pure-text") == 0)
 626             ;
 627           else
 628             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 629           break;
 630         case 'A':
 631           ldfile_add_arch (optarg);
 632           break;
 633         case 'b':
 634           lang_add_target (optarg);
 635           break;
 636         case 'c':
 637           ldfile_open_command_file (optarg);
 638           parser_input = input_mri_script;
 639           yyparse ();
 640           break;
 641         case OPTION_CALL_SHARED:
 642           config.dynamic_link = TRUE;
 643           break;
 644         case OPTION_NON_SHARED:
 645           config.dynamic_link = FALSE;
 646           break;
 647         case OPTION_CREF:
 648           command_line.cref = TRUE;
 649           link_info.notice_all = TRUE;
 650           break;
 651         case 'd':
 652           command_line.force_common_definition = TRUE;
 653           break;
 654         case OPTION_DEFSYM:
 655           lex_string = optarg;
 656           lex_redirect (optarg);
 657           parser_input = input_defsym;
 658           parsing_defsym = 1;
 659           yyparse ();
 660           parsing_defsym = 0;
 661           lex_string = NULL;
 662           break;
 663         case OPTION_DEMANGLE:
 664           demangling = TRUE;
 665           if (optarg != NULL)
 666             {
 667               enum demangling_styles style;
 668
 669               style = cplus_demangle_name_to_style (optarg);
 670               if (style == unknown_demangling)
 671                 einfo (_("%F%P: unknown demangling style `%s'"),
 672                        optarg);
 673
 674               cplus_demangle_set_style (style);
 675             }
 676           break;
 677         case 'I':               /* Used on Solaris.  */
 678         case OPTION_DYNAMIC_LINKER:
 679           command_line.interpreter = optarg;
 680           break;
 681         case OPTION_EB:
 682           command_line.endian = ENDIAN_BIG;
 683           break;
 684         case OPTION_EL:
 685           command_line.endian = ENDIAN_LITTLE;
 686           break;
 687         case OPTION_EMBEDDED_RELOCS:
 688           command_line.embedded_relocs = TRUE;
 689           break;
 690         case OPTION_EXPORT_DYNAMIC:
 691         case 'E': /* HP/UX compatibility.  */
 692           link_info.export_dynamic = TRUE;
 693           break;
 694         case 'e':
 695           lang_add_entry (optarg, TRUE);
 696           break;
 697         case 'f':
 698           if (command_line.auxiliary_filters == NULL)
 699             {
 700               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 701               command_line.auxiliary_filters[0] = optarg;
 702               command_line.auxiliary_filters[1] = NULL;
 703             }
 704           else
 705             {
 706               int c;
 707               char **p;
 708
 709               c = 0;
 710               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 711                 ++c;
 712               command_line.auxiliary_filters
 713                 = xrealloc (command_line.auxiliary_filters,
 714                             (c + 2) * sizeof (char *));
 715               command_line.auxiliary_filters[c] = optarg;
 716               command_line.auxiliary_filters[c + 1] = NULL;
 717             }
 718           break;
 719         case 'F':
 720           command_line.filter_shlib = optarg;
 721           break;
 722         case OPTION_FORCE_EXE_SUFFIX:
 723           command_line.force_exe_suffix = TRUE;
 724           break;
 725         case 'G':
 726           {
 727             char *end;
 728             g_switch_value = strtoul (optarg, &end, 0);
 729             if (*end)
 730               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 731           }
 732           break;
 733         case 'g':
 734           /* Ignore.  */
 735           break;
 736         case OPTION_GC_SECTIONS:
 737           command_line.gc_sections = TRUE;
 738           break;
 739         case OPTION_HELP:
 740           help ();
 741           xexit (0);
 742           break;
 743         case 'L':
 744           ldfile_add_library_path (optarg, TRUE);
 745           break;
 746         case 'l':
 747           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 748           break;
 749         case 'M':
 750           config.map_filename = "-";
 751           break;
 752         case 'm':
 753           /* Ignore.  Was handled in a pre-parse.   */
 754           break;
 755         case OPTION_MAP:
 756           config.map_filename = optarg;
 757           break;
 758         case 'N':
 759           config.text_read_only = FALSE;
 760           config.magic_demand_paged = FALSE;
 761           config.dynamic_link = FALSE;
 762           break;
 763         case OPTION_NO_OMAGIC:
 764           config.text_read_only = TRUE;
 765           config.magic_demand_paged = TRUE;
 766           /* NB/ Does not set dynamic_link to TRUE.
 767              Use --call-shared or -Bdynamic for this.  */
 768           break;
 769         case 'n':
 770           config.magic_demand_paged = FALSE;
 771           config.dynamic_link = FALSE;
 772           break;
 773         case OPTION_NO_DEFINE_COMMON:
 774           command_line.inhibit_common_definition = TRUE;
 775           break;
 776         case OPTION_NO_DEMANGLE:
 777           demangling = FALSE;
 778           break;
 779         case OPTION_NO_GC_SECTIONS:
 780           command_line.gc_sections = FALSE;
 781           break;
 782         case OPTION_NO_KEEP_MEMORY:
 783           link_info.keep_memory = FALSE;
 784           break;
 785         case OPTION_NO_UNDEFINED:
 786           link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 787           break;
 788         case OPTION_ALLOW_SHLIB_UNDEFINED:
 789           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 790           break;
 791         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 792           link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 793           break;
 794         case OPTION_UNRESOLVED_SYMBOLS:
 795           if (strcmp (optarg, "ignore-all") == 0)
 796             {
 797               link_info.unresolved_syms_in_objects = RM_IGNORE;
 798               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 799             }
 800           else if (strcmp (optarg, "report-all") == 0)
 801             {
 802               link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 803               link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 804             }
 805           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 806             {
 807               link_info.unresolved_syms_in_objects = RM_IGNORE;
 808               link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 809             }
 810           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 811             {
 812               link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 813               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 814             }
 815           else
 816             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 817           break;
 818         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 819           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 820           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 821             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 822           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 823             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 824           break;
 825
 826         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 827           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 828           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 829             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 830           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 831             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 832           break;
 833         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 834           link_info.allow_multiple_definition = TRUE;
 835           break;
 836         case OPTION_NO_UNDEFINED_VERSION:
 837           link_info.allow_undefined_version = FALSE;
 838           break;
 839         case OPTION_NO_WARN_MISMATCH:
 840           command_line.warn_mismatch = FALSE;
 841           break;
 842         case OPTION_NOINHIBIT_EXEC:
 843           force_make_executable = TRUE;
 844           break;
 845         case OPTION_NOSTDLIB:
 846           config.only_cmd_line_lib_dirs = TRUE;
 847           break;
 848         case OPTION_NO_WHOLE_ARCHIVE:
 849           whole_archive = FALSE;
 850           break;
 851         case 'O':
 852           /* FIXME "-O<non-digits> <value>" used to set the address of
 853              section <non-digits>.  Was this for compatibility with
 854              something, or can we create a new option to do that
 855              (with a syntax similar to -defsym)?
 856              getopt can't handle two args to an option without kludges.  */
 857
 858           /* Enable optimizations of output files.  */
 859           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 860           break;
 861         case 'o':
 862           lang_add_output (optarg, 0);
 863           break;
 864         case OPTION_OFORMAT:
 865           lang_add_output_format (optarg, NULL, NULL, 0);
 866           break;
 867         case 'q':
 868           link_info.emitrelocations = TRUE;
 869           break;
 870         case 'i':
 871         case 'r':
 872           if (optind == last_optind)
 873             /* This can happen if the user put "-rpath,a" on the command
 874                line.  (Or something similar.  The comma is important).
 875                Getopt becomes confused and thinks that this is a -r option
 876                but it cannot parse the text after the -r so it refuses to
 877                increment the optind counter.  Detect this case and issue
 878                an error message here.  We cannot just make this a warning,
 879                increment optind, and continue because getopt is too confused
 880                and will seg-fault the next time around.  */
 881             einfo(_("%P%F: bad -rpath option\n"));
 882
 883           link_info.relocatable = TRUE;
 884           config.build_constructors = FALSE;
 885           config.magic_demand_paged = FALSE;
 886           config.text_read_only = FALSE;
 887           config.dynamic_link = FALSE;
 888           break;
 889         case 'R':
 890           /* The GNU linker traditionally uses -R to mean to include
 891              only the symbols from a file.  The Solaris linker uses -R
 892              to set the path used by the runtime linker to find
 893              libraries.  This is the GNU linker -rpath argument.  We
 894              try to support both simultaneously by checking the file
 895              named.  If it is a directory, rather than a regular file,
 896              we assume -rpath was meant.  */
 897           {
 898             struct stat s;
 899
 900             if (stat (optarg, &s) >= 0
 901                 && ! S_ISDIR (s.st_mode))
 902               {
 903                 lang_add_input_file (optarg,
 904                                      lang_input_file_is_symbols_only_enum,
 905                                      NULL);
 906                 break;
 907               }
 908           }
 909           /* Fall through.  */
 910         case OPTION_RPATH:
 911           if (command_line.rpath == NULL)
 912             command_line.rpath = xstrdup (optarg);
 913           else
 914             {
 915               size_t rpath_len = strlen (command_line.rpath);
 916               size_t optarg_len = strlen (optarg);
 917               char *buf;
 918               char *cp = command_line.rpath;
 919
 920               /* First see whether OPTARG is already in the path.  */
 921               do
 922                 {
 923                   size_t idx = 0;
 924
 925                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 926                     ++idx;
 927                   if (optarg[idx] == '\0'
 928                       && (cp[idx] == '\0' || cp[idx] == ':'))
 929                     /* We found it.  */
 930                     break;
 931
 932                   /* Not yet found.  */
 933                   cp = strchr (cp, ':');
 934                   if (cp != NULL)
 935                     ++cp;
 936                 }
 937               while (cp != NULL);
 938
 939               if (cp == NULL)
 940                 {
 941                   buf = xmalloc (rpath_len + optarg_len + 2);
 942                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
 943                   free (command_line.rpath);
 944                   command_line.rpath = buf;
 945                 }
 946             }
 947           break;
 948         case OPTION_RPATH_LINK:
 949           if (command_line.rpath_link == NULL)
 950             command_line.rpath_link = xstrdup (optarg);
 951           else
 952             {
 953               char *buf;
 954
 955               buf = xmalloc (strlen (command_line.rpath_link)
 956                              + strlen (optarg)
 957                              + 2);
 958               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 959               free (command_line.rpath_link);
 960               command_line.rpath_link = buf;
 961             }
 962           break;
 963         case OPTION_RELAX:
 964           command_line.relax = TRUE;
 965           break;
 966         case OPTION_RETAIN_SYMBOLS_FILE:
 967           add_keepsyms_file (optarg);
 968           break;
 969         case 'S':
 970           link_info.strip = strip_debugger;
 971           break;
 972         case 's':
 973           link_info.strip = strip_all;
 974           break;
 975         case OPTION_STRIP_DISCARDED:
 976           link_info.strip_discarded = TRUE;
 977           break;
 978         case OPTION_NO_STRIP_DISCARDED:
 979           link_info.strip_discarded = FALSE;
 980           break;
 981         case OPTION_SHARED:
 982           if (config.has_shared)
 983             {
 984               link_info.shared = TRUE;
 985               /* When creating a shared library, the default
 986                  behaviour is to ignore any unresolved references.  */
 987               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
 988                 link_info.unresolved_syms_in_objects = RM_IGNORE;
 989               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
 990                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 991             }
 992           else
 993             einfo (_("%P%F: -shared not supported\n"));
 994           break;
 995         case OPTION_PIE:
 996           if (config.has_shared)
 997             {
 998               link_info.shared = TRUE;
 999               link_info.pie = TRUE;
1000             }
1001           else
1002             einfo (_("%P%F: -pie not supported\n"));
1003           break;
1004         case 'h':               /* Used on Solaris.  */
1005         case OPTION_SONAME:
1006           command_line.soname = optarg;
1007           break;
1008         case OPTION_SORT_COMMON:
1009           config.sort_common = TRUE;
1010           break;
1011         case OPTION_STATS:
1012           config.stats = TRUE;
1013           break;
1014         case OPTION_SYMBOLIC:
1015           link_info.symbolic = TRUE;
1016           break;
1017         case 't':
1018           trace_files = TRUE;
1019           break;
1020         case 'T':
1021           ldfile_open_command_file (optarg);
1022           parser_input = input_script;
1023           yyparse ();
1024           break;
1025         case OPTION_SECTION_START:
1026           {
1027             char *optarg2;
1028             char *sec_name;
1029             int len;
1030
1031             /* Check for <something>=<somthing>...  */
1032             optarg2 = strchr (optarg, '=');
1033             if (optarg2 == NULL)
1034               einfo (_("%P%F: invalid argument to option \"--section-start\"\n"));
1035
1036             optarg2++;
1037
1038             /* So far so good.  Are all the args present?  */
1039             if ((*optarg == '\0') || (*optarg2 == '\0'))
1040               einfo (_("%P%F: missing argument(s) to option \"--section-start\"\n"));
1041
1042             /* We must copy the section name as set_section_start
1043                doesn't do it for us.  */
1044             len = optarg2 - optarg;
1045             sec_name = xmalloc (len);
1046             memcpy (sec_name, optarg, len - 1);
1047             sec_name[len - 1] = 0;
1048
1049             /* Then set it...  */
1050             set_section_start (sec_name, optarg2);
1051           }
1052           break;
1053         case OPTION_TARGET_HELP:
1054           /* Mention any target specific options.  */
1055           ldemul_list_emulation_options (stdout);
1056           exit (0);
1057         case OPTION_TBSS:
1058           set_section_start (".bss", optarg);
1059           break;
1060         case OPTION_TDATA:
1061           set_section_start (".data", optarg);
1062           break;
1063         case OPTION_TTEXT:
1064           set_section_start (".text", optarg);
1065           break;
1066         case OPTION_TRADITIONAL_FORMAT:
1067           link_info.traditional_format = TRUE;
1068           break;
1069         case OPTION_TASK_LINK:
1070           link_info.task_link = TRUE;
1071           /* Fall through - do an implied -r option.  */
1072         case OPTION_UR:
1073           link_info.relocatable = TRUE;
1074           config.build_constructors = TRUE;
1075           config.magic_demand_paged = FALSE;
1076           config.text_read_only = FALSE;
1077           config.dynamic_link = FALSE;
1078           break;
1079         case 'u':
1080           ldlang_add_undef (optarg);
1081           break;
1082         case OPTION_UNIQUE:
1083           if (optarg != NULL)
1084             lang_add_unique (optarg);
1085           else
1086             config.unique_orphan_sections = TRUE;
1087           break;
1088         case OPTION_VERBOSE:
1089           ldversion (1);
1090           version_printed = TRUE;
1091           trace_file_tries = TRUE;
1092           overflow_cutoff_limit = -2;
1093           break;
1094         case 'v':
1095           ldversion (0);
1096           version_printed = TRUE;
1097           break;
1098         case 'V':
1099           ldversion (1);
1100           version_printed = TRUE;
1101           break;
1102         case OPTION_VERSION:
1103           ldversion (2);
1104           xexit (0);
1105           break;
1106         case OPTION_VERSION_SCRIPT:
1107           /* This option indicates a small script that only specifies
1108              version information.  Read it, but don't assume that
1109              we've seen a linker script.  */
1110           {
1111             FILE *hold_script_handle;
1112
1113             hold_script_handle = saved_script_handle;
1114             ldfile_open_command_file (optarg);
1115             saved_script_handle = hold_script_handle;
1116             parser_input = input_version_script;
1117             yyparse ();
1118           }
1119           break;
1120         case OPTION_VERSION_EXPORTS_SECTION:
1121           /* This option records a version symbol to be applied to the
1122              symbols listed for export to be found in the object files
1123              .exports sections.  */
1124           command_line.version_exports_section = optarg;
1125           break;
1126         case OPTION_WARN_COMMON:
1127           config.warn_common = TRUE;
1128           break;
1129         case OPTION_WARN_CONSTRUCTORS:
1130           config.warn_constructors = TRUE;
1131           break;
1132         case OPTION_WARN_FATAL:
1133           config.fatal_warnings = TRUE;
1134           break;
1135         case OPTION_WARN_MULTIPLE_GP:
1136           config.warn_multiple_gp = TRUE;
1137           break;
1138         case OPTION_WARN_ONCE:
1139           config.warn_once = TRUE;
1140           break;
1141         case OPTION_WARN_SECTION_ALIGN:
1142           config.warn_section_align = TRUE;
1143           break;
1144         case OPTION_WHOLE_ARCHIVE:
1145           whole_archive = TRUE;
1146           break;
1147         case OPTION_AS_NEEDED:
1148           as_needed = TRUE;
1149           break;
1150         case OPTION_NO_AS_NEEDED:
1151           as_needed = FALSE;
1152           break;
1153         case OPTION_WRAP:
1154           add_wrap (optarg);
1155           break;
1156         case OPTION_DISCARD_NONE:
1157           link_info.discard = discard_none;
1158           break;
1159         case 'X':
1160           link_info.discard = discard_l;
1161           break;
1162         case 'x':
1163           link_info.discard = discard_all;
1164           break;
1165         case 'Y':
1166           if (strncmp (optarg, "P,", 2) == 0)
1167             optarg += 2;
1168           if (default_dirlist != NULL)
1169             free (default_dirlist);
1170           default_dirlist = xstrdup (optarg);
1171           break;
1172         case 'y':
1173           add_ysym (optarg);
1174           break;
1175         case OPTION_SPARE_DYNAMIC_TAGS:
1176           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1177           break;
1178         case OPTION_SPLIT_BY_RELOC:
1179           if (optarg != NULL)
1180             config.split_by_reloc = strtoul (optarg, NULL, 0);
1181           else
1182             config.split_by_reloc = 32768;
1183           break;
1184         case OPTION_SPLIT_BY_FILE:
1185           if (optarg != NULL)
1186             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1187           else
1188             config.split_by_file = 1;
1189           break;
1190         case OPTION_CHECK_SECTIONS:
1191           command_line.check_section_addresses = TRUE;
1192           break;
1193         case OPTION_NO_CHECK_SECTIONS:
1194           command_line.check_section_addresses = FALSE;
1195           break;
1196         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1197           command_line.accept_unknown_input_arch = TRUE;
1198           break;
1199         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1200           command_line.accept_unknown_input_arch = FALSE;
1201           break;
1202         case '(':
1203           if (ingroup)
1204             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1205
1206           lang_enter_group ();
1207           ingroup = 1;
1208           break;
1209         case ')':
1210           if (! ingroup)
1211             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1212
1213           lang_leave_group ();
1214           ingroup = 0;
1215           break;
1216
1217         case OPTION_INIT:
1218           link_info.init_function = optarg;
1219           break;
1220
1221         case OPTION_FINI:
1222           link_info.fini_function = optarg;
1223           break;
1224         }
1225     }
1226
1227   if (ingroup)
1228     lang_leave_group ();
1229
1230   if (default_dirlist != NULL)
1231     {
1232       set_default_dirlist (default_dirlist);
1233       free (default_dirlist);
1234     }
1235
1236   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1237     /* FIXME: Should we allow emulations a chance to set this ?  */
1238     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1239
1240   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1241     /* FIXME: Should we allow emulations a chance to set this ?  */
1242     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1243 }
1244
1245 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1246    library search path.  */
1247
1248 static void
1249 set_default_dirlist (char *dirlist_ptr)
1250 {
1251   char *p;
1252
1253   while (1)
1254     {
1255       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1256       if (p != NULL)
1257         *p = '\0';
1258       if (*dirlist_ptr != '\0')
1259         ldfile_add_library_path (dirlist_ptr, TRUE);
1260       if (p == NULL)
1261         break;
1262       dirlist_ptr = p + 1;
1263     }
1264 }
1265
1266 static void
1267 set_section_start (char *sect, char *valstr)
1268 {
1269   const char *end;
1270   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1271   if (*end)
1272     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1273   lang_section_start (sect, exp_intop (val));
1274 }
1275 \f
1276 /* Print help messages for the options.  */
1277
1278 static void
1279 help (void)
1280 {
1281   unsigned i;
1282   const char **targets, **pp;
1283
1284   printf (_("Usage: %s [options] file...\n"), program_name);
1285
1286   printf (_("Options:\n"));
1287   for (i = 0; i < OPTION_COUNT; i++)
1288     {
1289       if (ld_options[i].doc != NULL)
1290         {
1291           bfd_boolean comma;
1292           int len;
1293           unsigned j;
1294
1295           printf ("  ");
1296
1297           comma = FALSE;
1298           len = 2;
1299
1300           j = i;
1301           do
1302             {
1303               if (ld_options[j].shortopt != '\0'
1304                   && ld_options[j].control != NO_HELP)
1305                 {
1306                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1307                   len += (comma ? 2 : 0) + 2;
1308                   if (ld_options[j].arg != NULL)
1309                     {
1310                       if (ld_options[j].opt.has_arg != optional_argument)
1311                         {
1312                           printf (" ");
1313                           ++len;
1314                         }
1315                       printf ("%s", _(ld_options[j].arg));
1316                       len += strlen (_(ld_options[j].arg));
1317                     }
1318                   comma = TRUE;
1319                 }
1320               ++j;
1321             }
1322           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1323
1324           j = i;
1325           do
1326             {
1327               if (ld_options[j].opt.name != NULL
1328                   && ld_options[j].control != NO_HELP)
1329                 {
1330                   int two_dashes =
1331                     (ld_options[j].control == TWO_DASHES
1332                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1333
1334                   printf ("%s-%s%s",
1335                           comma ? ", " : "",
1336                           two_dashes ? "-" : "",
1337                           ld_options[j].opt.name);
1338                   len += ((comma ? 2 : 0)
1339                           + 1
1340                           + (two_dashes ? 1 : 0)
1341                           + strlen (ld_options[j].opt.name));
1342                   if (ld_options[j].arg != NULL)
1343                     {
1344                       printf (" %s", _(ld_options[j].arg));
1345                       len += 1 + strlen (_(ld_options[j].arg));
1346                     }
1347                   comma = TRUE;
1348                 }
1349               ++j;
1350             }
1351           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1352
1353           if (len >= 30)
1354             {
1355               printf ("\n");
1356               len = 0;
1357             }
1358
1359           for (; len < 30; len++)
1360             putchar (' ');
1361
1362           printf ("%s\n", _(ld_options[i].doc));
1363         }
1364     }
1365
1366   /* Note: Various tools (such as libtool) depend upon the
1367      format of the listings below - do not change them.  */
1368   /* xgettext:c-format */
1369   printf (_("%s: supported targets:"), program_name);
1370   targets = bfd_target_list ();
1371   for (pp = targets; *pp != NULL; pp++)
1372     printf (" %s", *pp);
1373   free (targets);
1374   printf ("\n");
1375
1376   /* xgettext:c-format */
1377   printf (_("%s: supported emulations: "), program_name);
1378   ldemul_list_emulations (stdout);
1379   printf ("\n");
1380
1381   /* xgettext:c-format */
1382   printf (_("%s: emulation specific options:\n"), program_name);
1383   ldemul_list_emulation_options (stdout);
1384   printf ("\n");
1385
1386   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1387 }