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