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, 2005
   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, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include "config.h"
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libiberty.h"
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include "safe-ctype.h"
  30 #include "getopt.h"
  31 #include "bfdlink.h"
  32 #include "ld.h"
  33 #include "ldmain.h"
  34 #include "ldmisc.h"
  35 #include "ldexp.h"
  36 #include "ldlang.h"
  37 #include <ldgram.h>
  38 #include "ldlex.h"
  39 #include "ldfile.h"
  40 #include "ldver.h"
  41 #include "ldemul.h"
  42 #include "demangle.h"
  43
  44 #ifndef PATH_SEPARATOR
  45 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  46 #define PATH_SEPARATOR ';'
  47 #else
  48 #define PATH_SEPARATOR ':'
  49 #endif
  50 #endif
  51
  52 /* Somewhere above, sys/stat.h got included . . . .  */
  53 #if !defined(S_ISDIR) && defined(S_IFDIR)
  54 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  55 #endif
  56
  57 static void set_default_dirlist (char *);
  58 static void set_section_start (char *, char *);
  59 static void set_segment_start (const char *, char *);
  60 static void help (void);
  61
  62 /* Non-zero if we are processing a --defsym from the command line.  */
  63 int parsing_defsym = 0;
  64
  65 /* Codes used for the long options with no short synonyms.  150 isn't
  66    special; it's just an arbitrary non-ASCII char value.  */
  67 enum option_values
  68 {
  69   OPTION_ASSERT = 150,
  70   OPTION_CALL_SHARED,
  71   OPTION_CREF,
  72   OPTION_DEFSYM,
  73   OPTION_DEMANGLE,
  74   OPTION_DYNAMIC_LINKER,
  75   OPTION_SYSROOT,
  76   OPTION_EB,
  77   OPTION_EL,
  78   OPTION_EMBEDDED_RELOCS,
  79   OPTION_EXPORT_DYNAMIC,
  80   OPTION_HELP,
  81   OPTION_IGNORE,
  82   OPTION_MAP,
  83   OPTION_NO_DEMANGLE,
  84   OPTION_NO_KEEP_MEMORY,
  85   OPTION_NO_WARN_MISMATCH,
  86   OPTION_NOINHIBIT_EXEC,
  87   OPTION_NON_SHARED,
  88   OPTION_NO_WHOLE_ARCHIVE,
  89   OPTION_OFORMAT,
  90   OPTION_RELAX,
  91   OPTION_RETAIN_SYMBOLS_FILE,
  92   OPTION_RPATH,
  93   OPTION_RPATH_LINK,
  94   OPTION_SHARED,
  95   OPTION_SONAME,
  96   OPTION_SORT_COMMON,
  97   OPTION_SORT_SECTION,
  98   OPTION_STATS,
  99   OPTION_SYMBOLIC,
 100   OPTION_TASK_LINK,
 101   OPTION_TBSS,
 102   OPTION_TDATA,
 103   OPTION_TTEXT,
 104   OPTION_TRADITIONAL_FORMAT,
 105   OPTION_UR,
 106   OPTION_VERBOSE,
 107   OPTION_VERSION,
 108   OPTION_VERSION_SCRIPT,
 109   OPTION_VERSION_EXPORTS_SECTION,
 110   OPTION_DYNAMIC_LIST,
 111   OPTION_DYNAMIC_LIST_CPP_TYPEINFO,
 112   OPTION_WARN_COMMON,
 113   OPTION_WARN_CONSTRUCTORS,
 114   OPTION_WARN_FATAL,
 115   OPTION_WARN_MULTIPLE_GP,
 116   OPTION_WARN_ONCE,
 117   OPTION_WARN_SECTION_ALIGN,
 118   OPTION_SPLIT_BY_RELOC,
 119   OPTION_SPLIT_BY_FILE ,
 120   OPTION_WHOLE_ARCHIVE,
 121   OPTION_ADD_NEEDED,
 122   OPTION_NO_ADD_NEEDED,
 123   OPTION_AS_NEEDED,
 124   OPTION_NO_AS_NEEDED,
 125   OPTION_WRAP,
 126   OPTION_FORCE_EXE_SUFFIX,
 127   OPTION_GC_SECTIONS,
 128   OPTION_NO_GC_SECTIONS,
 129   OPTION_PRINT_GC_SECTIONS,
 130   OPTION_NO_PRINT_GC_SECTIONS,
 131   OPTION_HASH_SIZE,
 132   OPTION_CHECK_SECTIONS,
 133   OPTION_NO_CHECK_SECTIONS,
 134   OPTION_NO_UNDEFINED,
 135   OPTION_INIT,
 136   OPTION_FINI,
 137   OPTION_SECTION_START,
 138   OPTION_UNIQUE,
 139   OPTION_TARGET_HELP,
 140   OPTION_ALLOW_SHLIB_UNDEFINED,
 141   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 142   OPTION_ALLOW_MULTIPLE_DEFINITION,
 143   OPTION_NO_UNDEFINED_VERSION,
 144   OPTION_DEFAULT_SYMVER,
 145   OPTION_DEFAULT_IMPORTED_SYMVER,
 146   OPTION_DISCARD_NONE,
 147   OPTION_SPARE_DYNAMIC_TAGS,
 148   OPTION_NO_DEFINE_COMMON,
 149   OPTION_NOSTDLIB,
 150   OPTION_NO_OMAGIC,
 151   OPTION_STRIP_DISCARDED,
 152   OPTION_NO_STRIP_DISCARDED,
 153   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 154   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 155   OPTION_PIE,
 156   OPTION_UNRESOLVED_SYMBOLS,
 157   OPTION_WARN_UNRESOLVED_SYMBOLS,
 158   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 159   OPTION_WARN_SHARED_TEXTREL,
 160   OPTION_REDUCE_MEMORY_OVERHEADS
 161 };
 162
 163 /* The long options.  This structure is used for both the option
 164    parsing and the help text.  */
 165
 166 struct ld_option
 167 {
 168   /* The long option information.  */
 169   struct option opt;
 170   /* The short option with the same meaning ('\0' if none).  */
 171   char shortopt;
 172   /* The name of the argument (NULL if none).  */
 173   const char *arg;
 174   /* The documentation string.  If this is NULL, this is a synonym for
 175      the previous option.  */
 176   const char *doc;
 177   enum {
 178     /* Use one dash before long option name.  */
 179     ONE_DASH,
 180     /* Use two dashes before long option name.  */
 181     TWO_DASHES,
 182     /* Only accept two dashes before the long option name.
 183        This is an overloading of the use of this enum, since originally it
 184        was only intended to tell the --help display function how to display
 185        the long option name.  This feature was added in order to resolve
 186        the confusion about the -omagic command line switch.  Is it setting
 187        the output file name to "magic" or is it setting the NMAGIC flag on
 188        the output ?  It has been decided that it is setting the output file
 189        name, and that if you want to set the NMAGIC flag you should use -N
 190        or --omagic.  */
 191     EXACTLY_TWO_DASHES,
 192     /* Don't mention this option in --help output.  */
 193     NO_HELP
 194   } control;
 195 };
 196
 197 static const struct ld_option ld_options[] =
 198 {
 199   { {NULL, required_argument, NULL, '\0'},
 200     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 201     ONE_DASH },
 202   { {"architecture", required_argument, NULL, 'A'},
 203     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 204   { {"format", required_argument, NULL, 'b'},
 205     'b', N_("TARGET"), N_("Specify target for following input files"),
 206     TWO_DASHES },
 207   { {"mri-script", required_argument, NULL, 'c'},
 208     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 209   { {"dc", no_argument, NULL, 'd'},
 210     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 211   { {"dp", no_argument, NULL, 'd'},
 212     '\0', NULL, NULL, ONE_DASH },
 213   { {"entry", required_argument, NULL, 'e'},
 214     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 215   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 216     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 217   { {"EB", no_argument, NULL, OPTION_EB},
 218     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 219   { {"EL", no_argument, NULL, OPTION_EL},
 220     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 221   { {"auxiliary", required_argument, NULL, 'f'},
 222     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 223     TWO_DASHES },
 224   { {"filter", required_argument, NULL, 'F'},
 225     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 226     TWO_DASHES },
 227   { {NULL, no_argument, NULL, '\0'},
 228     'g', NULL, N_("Ignored"), ONE_DASH },
 229   { {"gpsize", required_argument, NULL, 'G'},
 230     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 231     TWO_DASHES },
 232   { {"soname", required_argument, NULL, OPTION_SONAME},
 233     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 234   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 235     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 236     TWO_DASHES },
 237   { {"library", required_argument, NULL, 'l'},
 238     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 239   { {"library-path", required_argument, NULL, 'L'},
 240     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 241     TWO_DASHES },
 242   { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
 243     '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
 244   { {NULL, required_argument, NULL, '\0'},
 245     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 246   { {"print-map", no_argument, NULL, 'M'},
 247     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 248   { {"nmagic", no_argument, NULL, 'n'},
 249     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 250   { {"omagic", no_argument, NULL, 'N'},
 251     'N', NULL, N_("Do not page align data, do not make text readonly"),
 252     EXACTLY_TWO_DASHES },
 253   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 254     '\0', NULL, N_("Page align data, make text readonly"),
 255     EXACTLY_TWO_DASHES },
 256   { {"output", required_argument, NULL, 'o'},
 257     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 258   { {NULL, required_argument, NULL, '\0'},
 259     'O', NULL, N_("Optimize output file"), ONE_DASH },
 260   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 261     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 262   { {"emit-relocs", no_argument, NULL, 'q'},
 263     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 264   { {"relocatable", no_argument, NULL, 'r'},
 265     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 266   { {NULL, no_argument, NULL, '\0'},
 267     'i', NULL, NULL, ONE_DASH },
 268   { {"just-symbols", required_argument, NULL, 'R'},
 269     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 270     TWO_DASHES },
 271   { {"strip-all", no_argument, NULL, 's'},
 272     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 273   { {"strip-debug", no_argument, NULL, 'S'},
 274     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 275   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 276     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 277   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 278     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 279   { {"trace", no_argument, NULL, 't'},
 280     't', NULL, N_("Trace file opens"), TWO_DASHES },
 281   { {"script", required_argument, NULL, 'T'},
 282     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 283   { {"undefined", required_argument, NULL, 'u'},
 284     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 285     TWO_DASHES },
 286   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 287     '\0', N_("[=SECTION]"),
 288     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 289   { {"Ur", no_argument, NULL, OPTION_UR},
 290     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 291   { {"version", no_argument, NULL, OPTION_VERSION},
 292     'v', NULL, N_("Print version information"), TWO_DASHES },
 293   { {NULL, no_argument, NULL, '\0'},
 294     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 295   { {"discard-all", no_argument, NULL, 'x'},
 296     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 297   { {"discard-locals", no_argument, NULL, 'X'},
 298     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 299   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 300     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 301   { {"trace-symbol", required_argument, NULL, 'y'},
 302     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 303   { {NULL, required_argument, NULL, '\0'},
 304     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 305     ONE_DASH },
 306   { {"start-group", no_argument, NULL, '('},
 307     '(', NULL, N_("Start a group"), TWO_DASHES },
 308   { {"end-group", no_argument, NULL, ')'},
 309     ')', NULL, N_("End a group"), TWO_DASHES },
 310   { {"accept-unknown-input-arch", no_argument, NULL,
 311      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 312     '\0', NULL,
 313     N_("Accept input files whose architecture cannot be determined"),
 314     TWO_DASHES },
 315   { {"no-accept-unknown-input-arch", no_argument, NULL,
 316      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 317     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 318     TWO_DASHES },
 319   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 320     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 321                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 322   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 323     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 324                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 325   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 326     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 327     TWO_DASHES },
 328   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 329     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 330     TWO_DASHES },
 331   { {"assert", required_argument, NULL, OPTION_ASSERT},
 332     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 333   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 334     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 335   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 336     '\0', NULL, NULL, ONE_DASH },
 337   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 338     '\0', NULL, NULL, ONE_DASH },
 339   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 340     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 341   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 342     '\0', NULL, NULL, ONE_DASH },
 343   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 344     '\0', NULL, NULL, ONE_DASH },
 345   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 346     '\0', NULL, NULL, ONE_DASH },
 347   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 348     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 349   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 350     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 351     TWO_DASHES },
 352   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 353     '\0', NULL, N_("Do not check section addresses for overlaps"),
 354     TWO_DASHES },
 355   { {"cref", no_argument, NULL, OPTION_CREF},
 356     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 357   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 358     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 359   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 360     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 361     TWO_DASHES },
 362   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 363     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 364   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 365     '\0', NULL, N_("Treat warnings as errors"),
 366     TWO_DASHES },
 367   { {"fini", required_argument, NULL, OPTION_FINI},
 368     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 369   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 370     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 371   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 372     '\0', NULL, N_("Remove unused sections (on some targets)"),
 373     TWO_DASHES },
 374   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 375     '\0', NULL, N_("Don't remove unused sections (default)"),
 376     TWO_DASHES },
 377   { {"print-gc-sections", no_argument, NULL, OPTION_PRINT_GC_SECTIONS},
 378     '\0', NULL, N_("List removed unused sections on stderr"),
 379     TWO_DASHES },
 380   { {"no-print-gc-sections", no_argument, NULL, OPTION_NO_PRINT_GC_SECTIONS},
 381     '\0', NULL, N_("Do not list removed unused sections"),
 382     TWO_DASHES },
 383   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 384     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 385     TWO_DASHES },
 386   { {"help", no_argument, NULL, OPTION_HELP},
 387     '\0', NULL, N_("Print option help"), TWO_DASHES },
 388   { {"init", required_argument, NULL, OPTION_INIT},
 389     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 390   { {"Map", required_argument, NULL, OPTION_MAP},
 391     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 392   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 393     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 394   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 395     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 396   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 397     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 398   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 399     '\0', NULL, N_("Do not allow unresolved references in object files"),
 400     TWO_DASHES },
 401   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 402     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 403     TWO_DASHES },
 404   { {"no-allow-shlib-undefined", no_argument, NULL,
 405      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 406     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 407     TWO_DASHES },
 408   { {"allow-multiple-definition", no_argument, NULL,
 409      OPTION_ALLOW_MULTIPLE_DEFINITION},
 410     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 411   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 412     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 413   { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
 414     '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
 415   { {"default-imported-symver", no_argument, NULL,
 416       OPTION_DEFAULT_IMPORTED_SYMVER},
 417     '\0', NULL, N_("Create default symbol version for imported symbols"),
 418     TWO_DASHES },
 419   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 420     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 421   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 422     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 423   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 424     '\0', NULL, N_("Create an output file even if errors occur"),
 425     TWO_DASHES },
 426   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 427     '\0', NULL, NULL, NO_HELP },
 428   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 429     '\0', NULL, N_("Only use library directories specified on\n"
 430                    "\t\t\t\tthe command line"), ONE_DASH },
 431   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 432     '\0', N_("TARGET"), N_("Specify target of output file"),
 433     EXACTLY_TWO_DASHES },
 434   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 435     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 436   { {"reduce-memory-overheads", no_argument, NULL,
 437      OPTION_REDUCE_MEMORY_OVERHEADS},
 438     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 439     TWO_DASHES },
 440   { {"relax", no_argument, NULL, OPTION_RELAX},
 441     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 442   { {"retain-symbols-file", required_argument, NULL,
 443      OPTION_RETAIN_SYMBOLS_FILE},
 444     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 445   { {"rpath", required_argument, NULL, OPTION_RPATH},
 446     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 447   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 448     '\0', N_("PATH"), N_("Set link time shared library search path"),
 449     ONE_DASH },
 450   { {"shared", no_argument, NULL, OPTION_SHARED},
 451     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 452   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 453     '\0', NULL, NULL, ONE_DASH },
 454   { {"pie", no_argument, NULL, OPTION_PIE},
 455     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 456   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 457     '\0', NULL, NULL, TWO_DASHES },
 458   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 459     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 460   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 461     '\0', NULL, NULL, NO_HELP },
 462   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 463     '\0', N_("name|alignment"),
 464     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 465   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 466     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 467     TWO_DASHES },
 468   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 469     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 470     TWO_DASHES },
 471   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 472     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 473     TWO_DASHES },
 474   { {"stats", no_argument, NULL, OPTION_STATS},
 475     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 476   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 477     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 478   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 479     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 480   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 481     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 482   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 483     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 484     TWO_DASHES },
 485   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 486     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 487   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 488     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 489   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 490     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 491   { {"unresolved-symbols=<method>", required_argument, NULL,
 492      OPTION_UNRESOLVED_SYMBOLS},
 493     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 494                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 495                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 496   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 497     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 498   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 499     '\0', NULL, NULL, NO_HELP },
 500   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 501     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 502   { {"version-exports-section", required_argument, NULL,
 503      OPTION_VERSION_EXPORTS_SECTION },
 504     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 505                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 506   { {"dynamic-list-cpp-typeinfo", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_TYPEINFO},
 507     '\0', NULL, N_("Use C++ typeinfo dynamic list"), TWO_DASHES },
 508   { {"dynamic-list", required_argument, NULL, OPTION_DYNAMIC_LIST},
 509     '\0', N_("FILE"), N_("Read dynamic list"), TWO_DASHES },
 510   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 511     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 512   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 513     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 514     TWO_DASHES },
 515   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 516     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 517   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 518     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 519   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 520     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 521     TWO_DASHES },
 522   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 523     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 524     TWO_DASHES },
 525   { {"warn-unresolved-symbols", no_argument, NULL,
 526      OPTION_WARN_UNRESOLVED_SYMBOLS},
 527     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 528   { {"error-unresolved-symbols", no_argument, NULL,
 529      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 530     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 531   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 532     '\0', NULL, N_("Include all objects from following archives"),
 533     TWO_DASHES },
 534   { {"wrap", required_argument, NULL, OPTION_WRAP},
 535     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 536 };
 537
 538 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 539
 540 void
 541 parse_args (unsigned argc, char **argv)
 542 {
 543   unsigned i;
 544   int is, il, irl;
 545   int ingroup = 0;
 546   char *default_dirlist = NULL;
 547   char *shortopts;
 548   struct option *longopts;
 549   struct option *really_longopts;
 550   int last_optind;
 551   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 552
 553   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 554   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 555   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 556
 557   /* Starting the short option string with '-' is for programs that
 558      expect options and other ARGV-elements in any order and that care about
 559      the ordering of the two.  We describe each non-option ARGV-element
 560      as if it were the argument of an option with character code 1.  */
 561   shortopts[0] = '-';
 562   is = 1;
 563   il = 0;
 564   irl = 0;
 565   for (i = 0; i < OPTION_COUNT; i++)
 566     {
 567       if (ld_options[i].shortopt != '\0')
 568         {
 569           shortopts[is] = ld_options[i].shortopt;
 570           ++is;
 571           if (ld_options[i].opt.has_arg == required_argument
 572               || ld_options[i].opt.has_arg == optional_argument)
 573             {
 574               shortopts[is] = ':';
 575               ++is;
 576               if (ld_options[i].opt.has_arg == optional_argument)
 577                 {
 578                   shortopts[is] = ':';
 579                   ++is;
 580                 }
 581             }
 582         }
 583       if (ld_options[i].opt.name != NULL)
 584         {
 585           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 586             {
 587               really_longopts[irl] = ld_options[i].opt;
 588               ++irl;
 589             }
 590           else
 591             {
 592               longopts[il] = ld_options[i].opt;
 593               ++il;
 594             }
 595         }
 596     }
 597   shortopts[is] = '\0';
 598   longopts[il].name = NULL;
 599   really_longopts[irl].name = NULL;
 600
 601   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 602
 603   /* The -G option is ambiguous on different platforms.  Sometimes it
 604      specifies the largest data size to put into the small data
 605      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 606      the first form takes an argument, while the second does not.
 607
 608      We need to permit the --shared form because on some platforms,
 609      such as Solaris, gcc -shared will pass -G to the linker.
 610
 611      To permit either usage, we look through the argument list.  If we
 612      find -G not followed by a number, we change it into --shared.
 613      This will work for most normal cases.  */
 614   for (i = 1; i < argc; i++)
 615     if (strcmp (argv[i], "-G") == 0
 616         && (i + 1 >= argc
 617             || ! ISDIGIT (argv[i + 1][0])))
 618       argv[i] = (char *) "--shared";
 619
 620   /* Because we permit long options to start with a single dash, and
 621      we have a --library option, and the -l option is conventionally
 622      used with an immediately following argument, we can have bad
 623      results if somebody tries to use -l with a library whose name
 624      happens to start with "ibrary", as in -li.  We avoid problems by
 625      simply turning -l into --library.  This means that users will
 626      have to use two dashes in order to use --library, which is OK
 627      since that's how it is documented.
 628
 629      FIXME: It's possible that this problem can arise for other short
 630      options as well, although the user does always have the recourse
 631      of adding a space between the option and the argument.  */
 632   for (i = 1; i < argc; i++)
 633     {
 634       if (argv[i][0] == '-'
 635           && argv[i][1] == 'l'
 636           && argv[i][2] != '\0')
 637         {
 638           char *n;
 639
 640           n = xmalloc (strlen (argv[i]) + 20);
 641           sprintf (n, "--library=%s", argv[i] + 2);
 642           argv[i] = n;
 643         }
 644     }
 645
 646   last_optind = -1;
 647   while (1)
 648     {
 649       int longind;
 650       int optc;
 651
 652       /* Using last_optind lets us avoid calling ldemul_parse_args
 653          multiple times on a single option, which would lead to
 654          confusion in the internal static variables maintained by
 655          getopt.  This could otherwise happen for an argument like
 656          -nx, in which the -n is parsed as a single option, and we
 657          loop around to pick up the -x.  */
 658       if (optind != last_optind)
 659         if (ldemul_parse_args (argc, argv))
 660           continue;
 661
 662       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 663          can indicate a long option.  */
 664       opterr = 0;
 665       last_optind = optind;
 666       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 667       if (optc == '?')
 668         {
 669           optind = last_optind;
 670           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 671         }
 672
 673       if (ldemul_handle_option (optc))
 674         continue;
 675
 676       if (optc == -1)
 677         break;
 678
 679       switch (optc)
 680         {
 681         case '?':
 682           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 683         default:
 684           einfo (_("%P%F: use the --help option for usage information\n"));
 685
 686         case 1:                 /* File name.  */
 687           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 688           break;
 689
 690         case OPTION_IGNORE:
 691           break;
 692         case 'a':
 693           /* For HP/UX compatibility.  Actually -a shared should mean
 694              ``use only shared libraries'' but, then, we don't
 695              currently support shared libraries on HP/UX anyhow.  */
 696           if (strcmp (optarg, "archive") == 0)
 697             config.dynamic_link = FALSE;
 698           else if (strcmp (optarg, "shared") == 0
 699                    || strcmp (optarg, "default") == 0)
 700             config.dynamic_link = TRUE;
 701           else
 702             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 703           break;
 704         case OPTION_ASSERT:
 705           /* FIXME: We just ignore these, but we should handle them.  */
 706           if (strcmp (optarg, "definitions") == 0)
 707             ;
 708           else if (strcmp (optarg, "nodefinitions") == 0)
 709             ;
 710           else if (strcmp (optarg, "nosymbolic") == 0)
 711             ;
 712           else if (strcmp (optarg, "pure-text") == 0)
 713             ;
 714           else
 715             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 716           break;
 717         case 'A':
 718           ldfile_add_arch (optarg);
 719           break;
 720         case 'b':
 721           lang_add_target (optarg);
 722           break;
 723         case 'c':
 724           ldfile_open_command_file (optarg);
 725           parser_input = input_mri_script;
 726           yyparse ();
 727           break;
 728         case OPTION_CALL_SHARED:
 729           config.dynamic_link = TRUE;
 730           break;
 731         case OPTION_NON_SHARED:
 732           config.dynamic_link = FALSE;
 733           break;
 734         case OPTION_CREF:
 735           command_line.cref = TRUE;
 736           link_info.notice_all = TRUE;
 737           break;
 738         case 'd':
 739           command_line.force_common_definition = TRUE;
 740           break;
 741         case OPTION_DEFSYM:
 742           lex_string = optarg;
 743           lex_redirect (optarg);
 744           parser_input = input_defsym;
 745           parsing_defsym = 1;
 746           yyparse ();
 747           parsing_defsym = 0;
 748           lex_string = NULL;
 749           break;
 750         case OPTION_DEMANGLE:
 751           demangling = TRUE;
 752           if (optarg != NULL)
 753             {
 754               enum demangling_styles style;
 755
 756               style = cplus_demangle_name_to_style (optarg);
 757               if (style == unknown_demangling)
 758                 einfo (_("%F%P: unknown demangling style `%s'"),
 759                        optarg);
 760
 761               cplus_demangle_set_style (style);
 762             }
 763           break;
 764         case 'I':               /* Used on Solaris.  */
 765         case OPTION_DYNAMIC_LINKER:
 766           command_line.interpreter = optarg;
 767           break;
 768         case OPTION_SYSROOT:
 769           /* Already handled in ldmain.c.  */
 770           break;
 771         case OPTION_EB:
 772           command_line.endian = ENDIAN_BIG;
 773           break;
 774         case OPTION_EL:
 775           command_line.endian = ENDIAN_LITTLE;
 776           break;
 777         case OPTION_EMBEDDED_RELOCS:
 778           command_line.embedded_relocs = TRUE;
 779           break;
 780         case OPTION_EXPORT_DYNAMIC:
 781         case 'E': /* HP/UX compatibility.  */
 782           link_info.export_dynamic = TRUE;
 783           break;
 784         case 'e':
 785           lang_add_entry (optarg, TRUE);
 786           break;
 787         case 'f':
 788           if (command_line.auxiliary_filters == NULL)
 789             {
 790               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 791               command_line.auxiliary_filters[0] = optarg;
 792               command_line.auxiliary_filters[1] = NULL;
 793             }
 794           else
 795             {
 796               int c;
 797               char **p;
 798
 799               c = 0;
 800               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 801                 ++c;
 802               command_line.auxiliary_filters
 803                 = xrealloc (command_line.auxiliary_filters,
 804                             (c + 2) * sizeof (char *));
 805               command_line.auxiliary_filters[c] = optarg;
 806               command_line.auxiliary_filters[c + 1] = NULL;
 807             }
 808           break;
 809         case 'F':
 810           command_line.filter_shlib = optarg;
 811           break;
 812         case OPTION_FORCE_EXE_SUFFIX:
 813           command_line.force_exe_suffix = TRUE;
 814           break;
 815         case 'G':
 816           {
 817             char *end;
 818             g_switch_value = strtoul (optarg, &end, 0);
 819             if (*end)
 820               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 821           }
 822           break;
 823         case 'g':
 824           /* Ignore.  */
 825           break;
 826         case OPTION_GC_SECTIONS:
 827           link_info.gc_sections = TRUE;
 828           break;
 829         case OPTION_PRINT_GC_SECTIONS:
 830           link_info.print_gc_sections = TRUE;
 831           break;
 832         case OPTION_HELP:
 833           help ();
 834           xexit (0);
 835           break;
 836         case 'L':
 837           ldfile_add_library_path (optarg, TRUE);
 838           break;
 839         case 'l':
 840           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 841           break;
 842         case 'M':
 843           config.map_filename = "-";
 844           break;
 845         case 'm':
 846           /* Ignore.  Was handled in a pre-parse.   */
 847           break;
 848         case OPTION_MAP:
 849           config.map_filename = optarg;
 850           break;
 851         case 'N':
 852           config.text_read_only = FALSE;
 853           config.magic_demand_paged = FALSE;
 854           config.dynamic_link = FALSE;
 855           break;
 856         case OPTION_NO_OMAGIC:
 857           config.text_read_only = TRUE;
 858           config.magic_demand_paged = TRUE;
 859           /* NB/ Does not set dynamic_link to TRUE.
 860              Use --call-shared or -Bdynamic for this.  */
 861           break;
 862         case 'n':
 863           config.magic_demand_paged = FALSE;
 864           config.dynamic_link = FALSE;
 865           break;
 866         case OPTION_NO_DEFINE_COMMON:
 867           command_line.inhibit_common_definition = TRUE;
 868           break;
 869         case OPTION_NO_DEMANGLE:
 870           demangling = FALSE;
 871           break;
 872         case OPTION_NO_GC_SECTIONS:
 873           link_info.gc_sections = FALSE;
 874           break;
 875         case OPTION_NO_PRINT_GC_SECTIONS:
 876           link_info.print_gc_sections = FALSE;
 877           break;
 878         case OPTION_NO_KEEP_MEMORY:
 879           link_info.keep_memory = FALSE;
 880           break;
 881         case OPTION_NO_UNDEFINED:
 882           link_info.unresolved_syms_in_objects
 883             = how_to_report_unresolved_symbols;
 884           break;
 885         case OPTION_ALLOW_SHLIB_UNDEFINED:
 886           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 887           break;
 888         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 889           link_info.unresolved_syms_in_shared_libs
 890             = how_to_report_unresolved_symbols;
 891           break;
 892         case OPTION_UNRESOLVED_SYMBOLS:
 893           if (strcmp (optarg, "ignore-all") == 0)
 894             {
 895               link_info.unresolved_syms_in_objects = RM_IGNORE;
 896               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 897             }
 898           else if (strcmp (optarg, "report-all") == 0)
 899             {
 900               link_info.unresolved_syms_in_objects
 901                 = how_to_report_unresolved_symbols;
 902               link_info.unresolved_syms_in_shared_libs
 903                 = how_to_report_unresolved_symbols;
 904             }
 905           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 906             {
 907               link_info.unresolved_syms_in_objects = RM_IGNORE;
 908               link_info.unresolved_syms_in_shared_libs
 909                 = how_to_report_unresolved_symbols;
 910             }
 911           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 912             {
 913               link_info.unresolved_syms_in_objects
 914                 = how_to_report_unresolved_symbols;
 915               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 916             }
 917           else
 918             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 919           break;
 920         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 921           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 922           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 923             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 924           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 925             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 926           break;
 927
 928         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 929           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 930           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 931             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 932           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 933             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 934           break;
 935         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 936           link_info.allow_multiple_definition = TRUE;
 937           break;
 938         case OPTION_NO_UNDEFINED_VERSION:
 939           link_info.allow_undefined_version = FALSE;
 940           break;
 941         case OPTION_DEFAULT_SYMVER:
 942           link_info.create_default_symver = TRUE;
 943           break;
 944         case OPTION_DEFAULT_IMPORTED_SYMVER:
 945           link_info.default_imported_symver = TRUE;
 946           break;
 947         case OPTION_NO_WARN_MISMATCH:
 948           command_line.warn_mismatch = FALSE;
 949           break;
 950         case OPTION_NOINHIBIT_EXEC:
 951           force_make_executable = TRUE;
 952           break;
 953         case OPTION_NOSTDLIB:
 954           config.only_cmd_line_lib_dirs = TRUE;
 955           break;
 956         case OPTION_NO_WHOLE_ARCHIVE:
 957           whole_archive = FALSE;
 958           break;
 959         case 'O':
 960           /* FIXME "-O<non-digits> <value>" used to set the address of
 961              section <non-digits>.  Was this for compatibility with
 962              something, or can we create a new option to do that
 963              (with a syntax similar to -defsym)?
 964              getopt can't handle two args to an option without kludges.  */
 965
 966           /* Enable optimizations of output files.  */
 967           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 968           break;
 969         case 'o':
 970           lang_add_output (optarg, 0);
 971           break;
 972         case OPTION_OFORMAT:
 973           lang_add_output_format (optarg, NULL, NULL, 0);
 974           break;
 975         case 'q':
 976           link_info.emitrelocations = TRUE;
 977           break;
 978         case 'i':
 979         case 'r':
 980           if (optind == last_optind)
 981             /* This can happen if the user put "-rpath,a" on the command
 982                line.  (Or something similar.  The comma is important).
 983                Getopt becomes confused and thinks that this is a -r option
 984                but it cannot parse the text after the -r so it refuses to
 985                increment the optind counter.  Detect this case and issue
 986                an error message here.  We cannot just make this a warning,
 987                increment optind, and continue because getopt is too confused
 988                and will seg-fault the next time around.  */
 989             einfo(_("%P%F: bad -rpath option\n"));
 990
 991           link_info.relocatable = TRUE;
 992           config.build_constructors = FALSE;
 993           config.magic_demand_paged = FALSE;
 994           config.text_read_only = FALSE;
 995           config.dynamic_link = FALSE;
 996           break;
 997         case 'R':
 998           /* The GNU linker traditionally uses -R to mean to include
 999              only the symbols from a file.  The Solaris linker uses -R
1000              to set the path used by the runtime linker to find
1001              libraries.  This is the GNU linker -rpath argument.  We
1002              try to support both simultaneously by checking the file
1003              named.  If it is a directory, rather than a regular file,
1004              we assume -rpath was meant.  */
1005           {
1006             struct stat s;
1007
1008             if (stat (optarg, &s) >= 0
1009                 && ! S_ISDIR (s.st_mode))
1010               {
1011                 lang_add_input_file (optarg,
1012                                      lang_input_file_is_symbols_only_enum,
1013                                      NULL);
1014                 break;
1015               }
1016           }
1017           /* Fall through.  */
1018         case OPTION_RPATH:
1019           if (command_line.rpath == NULL)
1020             command_line.rpath = xstrdup (optarg);
1021           else
1022             {
1023               size_t rpath_len = strlen (command_line.rpath);
1024               size_t optarg_len = strlen (optarg);
1025               char *buf;
1026               char *cp = command_line.rpath;
1027
1028               /* First see whether OPTARG is already in the path.  */
1029               do
1030                 {
1031                   size_t idx = 0;
1032
1033                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
1034                     ++idx;
1035                   if (optarg[idx] == '\0'
1036                       && (cp[idx] == '\0' || cp[idx] == ':'))
1037                     /* We found it.  */
1038                     break;
1039
1040                   /* Not yet found.  */
1041                   cp = strchr (cp, ':');
1042                   if (cp != NULL)
1043                     ++cp;
1044                 }
1045               while (cp != NULL);
1046
1047               if (cp == NULL)
1048                 {
1049                   buf = xmalloc (rpath_len + optarg_len + 2);
1050                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1051                   free (command_line.rpath);
1052                   command_line.rpath = buf;
1053                 }
1054             }
1055           break;
1056         case OPTION_RPATH_LINK:
1057           if (command_line.rpath_link == NULL)
1058             command_line.rpath_link = xstrdup (optarg);
1059           else
1060             {
1061               char *buf;
1062
1063               buf = xmalloc (strlen (command_line.rpath_link)
1064                              + strlen (optarg)
1065                              + 2);
1066               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1067               free (command_line.rpath_link);
1068               command_line.rpath_link = buf;
1069             }
1070           break;
1071         case OPTION_RELAX:
1072           command_line.relax = TRUE;
1073           break;
1074         case OPTION_RETAIN_SYMBOLS_FILE:
1075           add_keepsyms_file (optarg);
1076           break;
1077         case 'S':
1078           link_info.strip = strip_debugger;
1079           break;
1080         case 's':
1081           link_info.strip = strip_all;
1082           break;
1083         case OPTION_STRIP_DISCARDED:
1084           link_info.strip_discarded = TRUE;
1085           break;
1086         case OPTION_NO_STRIP_DISCARDED:
1087           link_info.strip_discarded = FALSE;
1088           break;
1089         case OPTION_SHARED:
1090           if (config.has_shared)
1091             {
1092               link_info.shared = TRUE;
1093               /* When creating a shared library, the default
1094                  behaviour is to ignore any unresolved references.  */
1095               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1096                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1097               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1098                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1099             }
1100           else
1101             einfo (_("%P%F: -shared not supported\n"));
1102           break;
1103         case OPTION_PIE:
1104           if (config.has_shared)
1105             {
1106               link_info.shared = TRUE;
1107               link_info.pie = TRUE;
1108             }
1109           else
1110             einfo (_("%P%F: -pie not supported\n"));
1111           break;
1112         case 'h':               /* Used on Solaris.  */
1113         case OPTION_SONAME:
1114           command_line.soname = optarg;
1115           break;
1116         case OPTION_SORT_COMMON:
1117           config.sort_common = TRUE;
1118           break;
1119         case OPTION_SORT_SECTION:
1120           if (strcmp (optarg, N_("name")) == 0)
1121             sort_section = by_name;
1122           else if (strcmp (optarg, N_("alignment")) == 0)
1123             sort_section = by_alignment;
1124           else
1125             einfo (_("%P%F: invalid section sorting option: %s\n"),
1126                    optarg);
1127           break;
1128         case OPTION_STATS:
1129           config.stats = TRUE;
1130           break;
1131         case OPTION_SYMBOLIC:
1132           link_info.symbolic = TRUE;
1133           break;
1134         case 't':
1135           trace_files = TRUE;
1136           break;
1137         case 'T':
1138           ldfile_open_command_file (optarg);
1139           parser_input = input_script;
1140           yyparse ();
1141           break;
1142         case OPTION_SECTION_START:
1143           {
1144             char *optarg2;
1145             char *sec_name;
1146             int len;
1147
1148             /* Check for <something>=<somthing>...  */
1149             optarg2 = strchr (optarg, '=');
1150             if (optarg2 == NULL)
1151               einfo (_("%P%F: invalid argument to option"
1152                        " \"--section-start\"\n"));
1153
1154             optarg2++;
1155
1156             /* So far so good.  Are all the args present?  */
1157             if ((*optarg == '\0') || (*optarg2 == '\0'))
1158               einfo (_("%P%F: missing argument(s) to option"
1159                        " \"--section-start\"\n"));
1160
1161             /* We must copy the section name as set_section_start
1162                doesn't do it for us.  */
1163             len = optarg2 - optarg;
1164             sec_name = xmalloc (len);
1165             memcpy (sec_name, optarg, len - 1);
1166             sec_name[len - 1] = 0;
1167
1168             /* Then set it...  */
1169             set_section_start (sec_name, optarg2);
1170           }
1171           break;
1172         case OPTION_TARGET_HELP:
1173           /* Mention any target specific options.  */
1174           ldemul_list_emulation_options (stdout);
1175           exit (0);
1176         case OPTION_TBSS:
1177           set_segment_start (".bss", optarg);
1178           break;
1179         case OPTION_TDATA:
1180           set_segment_start (".data", optarg);
1181           break;
1182         case OPTION_TTEXT:
1183           set_segment_start (".text", optarg);
1184           break;
1185         case OPTION_TRADITIONAL_FORMAT:
1186           link_info.traditional_format = TRUE;
1187           break;
1188         case OPTION_TASK_LINK:
1189           link_info.task_link = TRUE;
1190           /* Fall through - do an implied -r option.  */
1191         case OPTION_UR:
1192           link_info.relocatable = TRUE;
1193           config.build_constructors = TRUE;
1194           config.magic_demand_paged = FALSE;
1195           config.text_read_only = FALSE;
1196           config.dynamic_link = FALSE;
1197           break;
1198         case 'u':
1199           ldlang_add_undef (optarg);
1200           break;
1201         case OPTION_UNIQUE:
1202           if (optarg != NULL)
1203             lang_add_unique (optarg);
1204           else
1205             config.unique_orphan_sections = TRUE;
1206           break;
1207         case OPTION_VERBOSE:
1208           ldversion (1);
1209           version_printed = TRUE;
1210           trace_file_tries = TRUE;
1211           overflow_cutoff_limit = -2;
1212           break;
1213         case 'v':
1214           ldversion (0);
1215           version_printed = TRUE;
1216           break;
1217         case 'V':
1218           ldversion (1);
1219           version_printed = TRUE;
1220           break;
1221         case OPTION_VERSION:
1222           ldversion (2);
1223           xexit (0);
1224           break;
1225         case OPTION_VERSION_SCRIPT:
1226           /* This option indicates a small script that only specifies
1227              version information.  Read it, but don't assume that
1228              we've seen a linker script.  */
1229           {
1230             FILE *hold_script_handle;
1231
1232             hold_script_handle = saved_script_handle;
1233             ldfile_open_command_file (optarg);
1234             saved_script_handle = hold_script_handle;
1235             parser_input = input_version_script;
1236             yyparse ();
1237           }
1238           break;
1239         case OPTION_VERSION_EXPORTS_SECTION:
1240           /* This option records a version symbol to be applied to the
1241              symbols listed for export to be found in the object files
1242              .exports sections.  */
1243           command_line.version_exports_section = optarg;
1244           break;
1245         case OPTION_DYNAMIC_LIST_CPP_TYPEINFO:
1246           lang_append_dynamic_list_cpp_typeinfo ();
1247           break;
1248         case OPTION_DYNAMIC_LIST:
1249           /* This option indicates a small script that only specifies
1250              a dynamic list.  Read it, but don't assume that we've
1251              seen a linker script.  */
1252           {
1253             FILE *hold_script_handle;
1254
1255             hold_script_handle = saved_script_handle;
1256             ldfile_open_command_file (optarg);
1257             saved_script_handle = hold_script_handle;
1258             parser_input = input_dynamic_list;
1259             yyparse ();
1260           }
1261           break;
1262         case OPTION_WARN_COMMON:
1263           config.warn_common = TRUE;
1264           break;
1265         case OPTION_WARN_CONSTRUCTORS:
1266           config.warn_constructors = TRUE;
1267           break;
1268         case OPTION_WARN_FATAL:
1269           config.fatal_warnings = TRUE;
1270           break;
1271         case OPTION_WARN_MULTIPLE_GP:
1272           config.warn_multiple_gp = TRUE;
1273           break;
1274         case OPTION_WARN_ONCE:
1275           config.warn_once = TRUE;
1276           break;
1277         case OPTION_WARN_SECTION_ALIGN:
1278           config.warn_section_align = TRUE;
1279           break;
1280         case OPTION_WARN_SHARED_TEXTREL:
1281           link_info.warn_shared_textrel = TRUE;
1282           break;
1283         case OPTION_WHOLE_ARCHIVE:
1284           whole_archive = TRUE;
1285           break;
1286         case OPTION_ADD_NEEDED:
1287           add_needed = TRUE;
1288           break;
1289         case OPTION_NO_ADD_NEEDED:
1290           add_needed = FALSE;
1291           break;
1292         case OPTION_AS_NEEDED:
1293           as_needed = TRUE;
1294           break;
1295         case OPTION_NO_AS_NEEDED:
1296           as_needed = FALSE;
1297           break;
1298         case OPTION_WRAP:
1299           add_wrap (optarg);
1300           break;
1301         case OPTION_DISCARD_NONE:
1302           link_info.discard = discard_none;
1303           break;
1304         case 'X':
1305           link_info.discard = discard_l;
1306           break;
1307         case 'x':
1308           link_info.discard = discard_all;
1309           break;
1310         case 'Y':
1311           if (strncmp (optarg, "P,", 2) == 0)
1312             optarg += 2;
1313           if (default_dirlist != NULL)
1314             free (default_dirlist);
1315           default_dirlist = xstrdup (optarg);
1316           break;
1317         case 'y':
1318           add_ysym (optarg);
1319           break;
1320         case OPTION_SPARE_DYNAMIC_TAGS:
1321           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1322           break;
1323         case OPTION_SPLIT_BY_RELOC:
1324           if (optarg != NULL)
1325             config.split_by_reloc = strtoul (optarg, NULL, 0);
1326           else
1327             config.split_by_reloc = 32768;
1328           break;
1329         case OPTION_SPLIT_BY_FILE:
1330           if (optarg != NULL)
1331             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1332           else
1333             config.split_by_file = 1;
1334           break;
1335         case OPTION_CHECK_SECTIONS:
1336           command_line.check_section_addresses = TRUE;
1337           break;
1338         case OPTION_NO_CHECK_SECTIONS:
1339           command_line.check_section_addresses = FALSE;
1340           break;
1341         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1342           command_line.accept_unknown_input_arch = TRUE;
1343           break;
1344         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1345           command_line.accept_unknown_input_arch = FALSE;
1346           break;
1347         case '(':
1348           if (ingroup)
1349             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1350
1351           lang_enter_group ();
1352           ingroup = 1;
1353           break;
1354         case ')':
1355           if (! ingroup)
1356             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1357
1358           lang_leave_group ();
1359           ingroup = 0;
1360           break;
1361
1362         case OPTION_INIT:
1363           link_info.init_function = optarg;
1364           break;
1365
1366         case OPTION_FINI:
1367           link_info.fini_function = optarg;
1368           break;
1369
1370         case OPTION_REDUCE_MEMORY_OVERHEADS:
1371           command_line.reduce_memory_overheads = TRUE;
1372           if (config.hash_table_size == 0)
1373             config.hash_table_size = 1021;
1374           break;
1375
1376         case OPTION_HASH_SIZE:
1377           {
1378             bfd_size_type new_size;
1379
1380             new_size = strtoul (optarg, NULL, 0);
1381             if (new_size)
1382               config.hash_table_size = new_size;
1383             else
1384               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1385           }
1386           break;
1387         }
1388     }
1389
1390   if (ingroup)
1391     lang_leave_group ();
1392
1393   if (default_dirlist != NULL)
1394     {
1395       set_default_dirlist (default_dirlist);
1396       free (default_dirlist);
1397     }
1398
1399   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1400     /* FIXME: Should we allow emulations a chance to set this ?  */
1401     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1402
1403   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1404     /* FIXME: Should we allow emulations a chance to set this ?  */
1405     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1406 }
1407
1408 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1409    library search path.  */
1410
1411 static void
1412 set_default_dirlist (char *dirlist_ptr)
1413 {
1414   char *p;
1415
1416   while (1)
1417     {
1418       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1419       if (p != NULL)
1420         *p = '\0';
1421       if (*dirlist_ptr != '\0')
1422         ldfile_add_library_path (dirlist_ptr, TRUE);
1423       if (p == NULL)
1424         break;
1425       dirlist_ptr = p + 1;
1426     }
1427 }
1428
1429 static void
1430 set_section_start (char *sect, char *valstr)
1431 {
1432   const char *end;
1433   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1434   if (*end)
1435     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1436   lang_section_start (sect, exp_intop (val), NULL);
1437 }
1438
1439 static void
1440 set_segment_start (const char *section, char *valstr)
1441 {
1442   const char *name;
1443   const char *end;
1444   segment_type *seg;
1445
1446   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1447   if (*end)
1448     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1449   /* If we already have an entry for this segment, update the existing
1450      value.  */
1451   name = section + 1;
1452   for (seg = segments; seg; seg = seg->next)
1453     if (strcmp (seg->name, name) == 0)
1454       {
1455         seg->value = val;
1456         return;
1457       }
1458   /* There was no existing value so we must create a new segment
1459      entry.  */
1460   seg = stat_alloc (sizeof (*seg));
1461   seg->name = name;
1462   seg->value = val;
1463   seg->used = FALSE;
1464   /* Add it to the linked list of segments.  */
1465   seg->next = segments;
1466   segments = seg;
1467   /* Historically, -Ttext and friends set the base address of a
1468      particular section.  For backwards compatibility, we still do
1469      that.  If a SEGMENT_START directive is seen, the section address
1470      assignment will be disabled.  */
1471   lang_section_start (section, exp_intop (val), seg);
1472 }
1473
1474 \f
1475 /* Print help messages for the options.  */
1476
1477 static void
1478 help (void)
1479 {
1480   unsigned i;
1481   const char **targets, **pp;
1482   int len;
1483
1484   printf (_("Usage: %s [options] file...\n"), program_name);
1485
1486   printf (_("Options:\n"));
1487   for (i = 0; i < OPTION_COUNT; i++)
1488     {
1489       if (ld_options[i].doc != NULL)
1490         {
1491           bfd_boolean comma;
1492           unsigned j;
1493
1494           printf ("  ");
1495
1496           comma = FALSE;
1497           len = 2;
1498
1499           j = i;
1500           do
1501             {
1502               if (ld_options[j].shortopt != '\0'
1503                   && ld_options[j].control != NO_HELP)
1504                 {
1505                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1506                   len += (comma ? 2 : 0) + 2;
1507                   if (ld_options[j].arg != NULL)
1508                     {
1509                       if (ld_options[j].opt.has_arg != optional_argument)
1510                         {
1511                           printf (" ");
1512                           ++len;
1513                         }
1514                       printf ("%s", _(ld_options[j].arg));
1515                       len += strlen (_(ld_options[j].arg));
1516                     }
1517                   comma = TRUE;
1518                 }
1519               ++j;
1520             }
1521           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1522
1523           j = i;
1524           do
1525             {
1526               if (ld_options[j].opt.name != NULL
1527                   && ld_options[j].control != NO_HELP)
1528                 {
1529                   int two_dashes =
1530                     (ld_options[j].control == TWO_DASHES
1531                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1532
1533                   printf ("%s-%s%s",
1534                           comma ? ", " : "",
1535                           two_dashes ? "-" : "",
1536                           ld_options[j].opt.name);
1537                   len += ((comma ? 2 : 0)
1538                           + 1
1539                           + (two_dashes ? 1 : 0)
1540                           + strlen (ld_options[j].opt.name));
1541                   if (ld_options[j].arg != NULL)
1542                     {
1543                       printf (" %s", _(ld_options[j].arg));
1544                       len += 1 + strlen (_(ld_options[j].arg));
1545                     }
1546                   comma = TRUE;
1547                 }
1548               ++j;
1549             }
1550           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1551
1552           if (len >= 30)
1553             {
1554               printf ("\n");
1555               len = 0;
1556             }
1557
1558           for (; len < 30; len++)
1559             putchar (' ');
1560
1561           printf ("%s\n", _(ld_options[i].doc));
1562         }
1563     }
1564   printf (_("  @FILE"));
1565   for (len = strlen ("  @FILE"); len < 30; len++)
1566     putchar (' ');
1567   printf (_("Read options from FILE\n"));
1568
1569   /* Note: Various tools (such as libtool) depend upon the
1570      format of the listings below - do not change them.  */
1571   /* xgettext:c-format */
1572   printf (_("%s: supported targets:"), program_name);
1573   targets = bfd_target_list ();
1574   for (pp = targets; *pp != NULL; pp++)
1575     printf (" %s", *pp);
1576   free (targets);
1577   printf ("\n");
1578
1579   /* xgettext:c-format */
1580   printf (_("%s: supported emulations: "), program_name);
1581   ldemul_list_emulations (stdout);
1582   printf ("\n");
1583
1584   /* xgettext:c-format */
1585   printf (_("%s: emulation specific options:\n"), program_name);
1586   ldemul_list_emulation_options (stdout);
1587   printf ("\n");
1588
1589   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1590 }