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, 2006, 2007
   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 "bfdver.h"
  26 #include "sysdep.h"
  27 #include "libiberty.h"
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include "safe-ctype.h"
  31 #include "getopt.h"
  32 #include "bfdlink.h"
  33 #include "ld.h"
  34 #include "ldmain.h"
  35 #include "ldmisc.h"
  36 #include "ldexp.h"
  37 #include "ldlang.h"
  38 #include <ldgram.h>
  39 #include "ldlex.h"
  40 #include "ldfile.h"
  41 #include "ldver.h"
  42 #include "ldemul.h"
  43 #include "demangle.h"
  44
  45 #ifndef PATH_SEPARATOR
  46 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  47 #define PATH_SEPARATOR ';'
  48 #else
  49 #define PATH_SEPARATOR ':'
  50 #endif
  51 #endif
  52
  53 /* Somewhere above, sys/stat.h got included . . . .  */
  54 #if !defined(S_ISDIR) && defined(S_IFDIR)
  55 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  56 #endif
  57
  58 static void set_default_dirlist (char *);
  59 static void set_section_start (char *, char *);
  60 static void set_segment_start (const char *, char *);
  61 static void help (void);
  62
  63 /* Non-zero if we are processing a --defsym from the command line.  */
  64 int parsing_defsym = 0;
  65
  66 /* Codes used for the long options with no short synonyms.  150 isn't
  67    special; it's just an arbitrary non-ASCII char value.  */
  68 enum option_values
  69 {
  70   OPTION_ASSERT = 150,
  71   OPTION_CALL_SHARED,
  72   OPTION_CREF,
  73   OPTION_DEFSYM,
  74   OPTION_DEMANGLE,
  75   OPTION_DYNAMIC_LINKER,
  76   OPTION_SYSROOT,
  77   OPTION_EB,
  78   OPTION_EL,
  79   OPTION_EMBEDDED_RELOCS,
  80   OPTION_EXPORT_DYNAMIC,
  81   OPTION_HELP,
  82   OPTION_IGNORE,
  83   OPTION_MAP,
  84   OPTION_NO_DEMANGLE,
  85   OPTION_NO_KEEP_MEMORY,
  86   OPTION_NO_WARN_MISMATCH,
  87   OPTION_NOINHIBIT_EXEC,
  88   OPTION_NON_SHARED,
  89   OPTION_NO_WHOLE_ARCHIVE,
  90   OPTION_OFORMAT,
  91   OPTION_RELAX,
  92   OPTION_RETAIN_SYMBOLS_FILE,
  93   OPTION_RPATH,
  94   OPTION_RPATH_LINK,
  95   OPTION_SHARED,
  96   OPTION_SONAME,
  97   OPTION_SORT_COMMON,
  98   OPTION_SORT_SECTION,
  99   OPTION_STATS,
 100   OPTION_SYMBOLIC,
 101   OPTION_SYMBOLIC_FUNCTIONS,
 102   OPTION_TASK_LINK,
 103   OPTION_TBSS,
 104   OPTION_TDATA,
 105   OPTION_TTEXT,
 106   OPTION_TRADITIONAL_FORMAT,
 107   OPTION_UR,
 108   OPTION_VERBOSE,
 109   OPTION_VERSION,
 110   OPTION_VERSION_SCRIPT,
 111   OPTION_VERSION_EXPORTS_SECTION,
 112   OPTION_DYNAMIC_LIST,
 113   OPTION_DYNAMIC_LIST_CPP_NEW,
 114   OPTION_DYNAMIC_LIST_CPP_TYPEINFO,
 115   OPTION_DYNAMIC_LIST_DATA,
 116   OPTION_WARN_COMMON,
 117   OPTION_WARN_CONSTRUCTORS,
 118   OPTION_WARN_FATAL,
 119   OPTION_WARN_MULTIPLE_GP,
 120   OPTION_WARN_ONCE,
 121   OPTION_WARN_SECTION_ALIGN,
 122   OPTION_SPLIT_BY_RELOC,
 123   OPTION_SPLIT_BY_FILE ,
 124   OPTION_WHOLE_ARCHIVE,
 125   OPTION_ADD_NEEDED,
 126   OPTION_NO_ADD_NEEDED,
 127   OPTION_AS_NEEDED,
 128   OPTION_NO_AS_NEEDED,
 129   OPTION_WRAP,
 130   OPTION_FORCE_EXE_SUFFIX,
 131   OPTION_GC_SECTIONS,
 132   OPTION_NO_GC_SECTIONS,
 133   OPTION_PRINT_GC_SECTIONS,
 134   OPTION_NO_PRINT_GC_SECTIONS,
 135   OPTION_HASH_SIZE,
 136   OPTION_CHECK_SECTIONS,
 137   OPTION_NO_CHECK_SECTIONS,
 138   OPTION_NO_UNDEFINED,
 139   OPTION_INIT,
 140   OPTION_FINI,
 141   OPTION_SECTION_START,
 142   OPTION_UNIQUE,
 143   OPTION_TARGET_HELP,
 144   OPTION_ALLOW_SHLIB_UNDEFINED,
 145   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 146   OPTION_ALLOW_MULTIPLE_DEFINITION,
 147   OPTION_NO_UNDEFINED_VERSION,
 148   OPTION_DEFAULT_SYMVER,
 149   OPTION_DEFAULT_IMPORTED_SYMVER,
 150   OPTION_DISCARD_NONE,
 151   OPTION_SPARE_DYNAMIC_TAGS,
 152   OPTION_NO_DEFINE_COMMON,
 153   OPTION_NOSTDLIB,
 154   OPTION_NO_OMAGIC,
 155   OPTION_STRIP_DISCARDED,
 156   OPTION_NO_STRIP_DISCARDED,
 157   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 158   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 159   OPTION_PIE,
 160   OPTION_UNRESOLVED_SYMBOLS,
 161   OPTION_WARN_UNRESOLVED_SYMBOLS,
 162   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 163   OPTION_WARN_SHARED_TEXTREL,
 164   OPTION_REDUCE_MEMORY_OVERHEADS,
 165   OPTION_DEFAULT_SCRIPT
 166 };
 167
 168 /* The long options.  This structure is used for both the option
 169    parsing and the help text.  */
 170
 171 struct ld_option
 172 {
 173   /* The long option information.  */
 174   struct option opt;
 175   /* The short option with the same meaning ('\0' if none).  */
 176   char shortopt;
 177   /* The name of the argument (NULL if none).  */
 178   const char *arg;
 179   /* The documentation string.  If this is NULL, this is a synonym for
 180      the previous option.  */
 181   const char *doc;
 182   enum {
 183     /* Use one dash before long option name.  */
 184     ONE_DASH,
 185     /* Use two dashes before long option name.  */
 186     TWO_DASHES,
 187     /* Only accept two dashes before the long option name.
 188        This is an overloading of the use of this enum, since originally it
 189        was only intended to tell the --help display function how to display
 190        the long option name.  This feature was added in order to resolve
 191        the confusion about the -omagic command line switch.  Is it setting
 192        the output file name to "magic" or is it setting the NMAGIC flag on
 193        the output ?  It has been decided that it is setting the output file
 194        name, and that if you want to set the NMAGIC flag you should use -N
 195        or --omagic.  */
 196     EXACTLY_TWO_DASHES,
 197     /* Don't mention this option in --help output.  */
 198     NO_HELP
 199   } control;
 200 };
 201
 202 static const struct ld_option ld_options[] =
 203 {
 204   { {NULL, required_argument, NULL, '\0'},
 205     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 206     ONE_DASH },
 207   { {"architecture", required_argument, NULL, 'A'},
 208     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 209   { {"format", required_argument, NULL, 'b'},
 210     'b', N_("TARGET"), N_("Specify target for following input files"),
 211     TWO_DASHES },
 212   { {"mri-script", required_argument, NULL, 'c'},
 213     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 214   { {"dc", no_argument, NULL, 'd'},
 215     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 216   { {"dp", no_argument, NULL, 'd'},
 217     '\0', NULL, NULL, ONE_DASH },
 218   { {"entry", required_argument, NULL, 'e'},
 219     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 220   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 221     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 222   { {"EB", no_argument, NULL, OPTION_EB},
 223     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 224   { {"EL", no_argument, NULL, OPTION_EL},
 225     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 226   { {"auxiliary", required_argument, NULL, 'f'},
 227     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 228     TWO_DASHES },
 229   { {"filter", required_argument, NULL, 'F'},
 230     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 231     TWO_DASHES },
 232   { {NULL, no_argument, NULL, '\0'},
 233     'g', NULL, N_("Ignored"), ONE_DASH },
 234   { {"gpsize", required_argument, NULL, 'G'},
 235     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 236     TWO_DASHES },
 237   { {"soname", required_argument, NULL, OPTION_SONAME},
 238     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 239   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 240     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 241     TWO_DASHES },
 242   { {"library", required_argument, NULL, 'l'},
 243     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 244   { {"library-path", required_argument, NULL, 'L'},
 245     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 246     TWO_DASHES },
 247   { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
 248     '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
 249   { {NULL, required_argument, NULL, '\0'},
 250     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 251   { {"print-map", no_argument, NULL, 'M'},
 252     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 253   { {"nmagic", no_argument, NULL, 'n'},
 254     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 255   { {"omagic", no_argument, NULL, 'N'},
 256     'N', NULL, N_("Do not page align data, do not make text readonly"),
 257     EXACTLY_TWO_DASHES },
 258   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 259     '\0', NULL, N_("Page align data, make text readonly"),
 260     EXACTLY_TWO_DASHES },
 261   { {"output", required_argument, NULL, 'o'},
 262     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 263   { {NULL, required_argument, NULL, '\0'},
 264     'O', NULL, N_("Optimize output file"), ONE_DASH },
 265   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 266     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 267   { {"emit-relocs", no_argument, NULL, 'q'},
 268     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 269   { {"relocatable", no_argument, NULL, 'r'},
 270     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 271   { {NULL, no_argument, NULL, '\0'},
 272     'i', NULL, NULL, ONE_DASH },
 273   { {"just-symbols", required_argument, NULL, 'R'},
 274     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 275     TWO_DASHES },
 276   { {"strip-all", no_argument, NULL, 's'},
 277     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 278   { {"strip-debug", no_argument, NULL, 'S'},
 279     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 280   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 281     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 282   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 283     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 284   { {"trace", no_argument, NULL, 't'},
 285     't', NULL, N_("Trace file opens"), TWO_DASHES },
 286   { {"script", required_argument, NULL, 'T'},
 287     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 288   { {"default-script", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
 289     '\0', N_("FILE"), N_("Read default linker script"), TWO_DASHES },
 290   { {"dT", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
 291     '\0', NULL, NULL, ONE_DASH },
 292   { {"undefined", required_argument, NULL, 'u'},
 293     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 294     TWO_DASHES },
 295   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 296     '\0', N_("[=SECTION]"),
 297     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 298   { {"Ur", no_argument, NULL, OPTION_UR},
 299     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 300   { {"version", no_argument, NULL, OPTION_VERSION},
 301     'v', NULL, N_("Print version information"), TWO_DASHES },
 302   { {NULL, no_argument, NULL, '\0'},
 303     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 304   { {"discard-all", no_argument, NULL, 'x'},
 305     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 306   { {"discard-locals", no_argument, NULL, 'X'},
 307     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 308   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 309     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 310   { {"trace-symbol", required_argument, NULL, 'y'},
 311     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 312   { {NULL, required_argument, NULL, '\0'},
 313     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 314     ONE_DASH },
 315   { {"start-group", no_argument, NULL, '('},
 316     '(', NULL, N_("Start a group"), TWO_DASHES },
 317   { {"end-group", no_argument, NULL, ')'},
 318     ')', NULL, N_("End a group"), TWO_DASHES },
 319   { {"accept-unknown-input-arch", no_argument, NULL,
 320      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 321     '\0', NULL,
 322     N_("Accept input files whose architecture cannot be determined"),
 323     TWO_DASHES },
 324   { {"no-accept-unknown-input-arch", no_argument, NULL,
 325      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 326     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 327     TWO_DASHES },
 328   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 329     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 330                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 331   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 332     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 333                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 334   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 335     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 336     TWO_DASHES },
 337   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 338     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 339     TWO_DASHES },
 340   { {"assert", required_argument, NULL, OPTION_ASSERT},
 341     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 342   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 343     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 344   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 345     '\0', NULL, NULL, ONE_DASH },
 346   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 347     '\0', NULL, NULL, ONE_DASH },
 348   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 349     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 350   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 351     '\0', NULL, NULL, ONE_DASH },
 352   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 353     '\0', NULL, NULL, ONE_DASH },
 354   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 355     '\0', NULL, NULL, ONE_DASH },
 356   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 357     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 358   { {"Bsymbolic-functions", no_argument, NULL, OPTION_SYMBOLIC_FUNCTIONS},
 359     '\0', NULL, N_("Bind global function references locally"), ONE_DASH },
 360   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 361     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 362     TWO_DASHES },
 363   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 364     '\0', NULL, N_("Do not check section addresses for overlaps"),
 365     TWO_DASHES },
 366   { {"cref", no_argument, NULL, OPTION_CREF},
 367     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 368   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 369     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 370   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 371     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 372     TWO_DASHES },
 373   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 374     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 375   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 376     '\0', NULL, N_("Treat warnings as errors"),
 377     TWO_DASHES },
 378   { {"fini", required_argument, NULL, OPTION_FINI},
 379     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 380   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 381     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 382   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 383     '\0', NULL, N_("Remove unused sections (on some targets)"),
 384     TWO_DASHES },
 385   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 386     '\0', NULL, N_("Don't remove unused sections (default)"),
 387     TWO_DASHES },
 388   { {"print-gc-sections", no_argument, NULL, OPTION_PRINT_GC_SECTIONS},
 389     '\0', NULL, N_("List removed unused sections on stderr"),
 390     TWO_DASHES },
 391   { {"no-print-gc-sections", no_argument, NULL, OPTION_NO_PRINT_GC_SECTIONS},
 392     '\0', NULL, N_("Do not list removed unused sections"),
 393     TWO_DASHES },
 394   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 395     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 396     TWO_DASHES },
 397   { {"help", no_argument, NULL, OPTION_HELP},
 398     '\0', NULL, N_("Print option help"), TWO_DASHES },
 399   { {"init", required_argument, NULL, OPTION_INIT},
 400     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 401   { {"Map", required_argument, NULL, OPTION_MAP},
 402     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 403   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 404     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 405   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 406     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 407   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 408     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 409   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 410     '\0', NULL, N_("Do not allow unresolved references in object files"),
 411     TWO_DASHES },
 412   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 413     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 414     TWO_DASHES },
 415   { {"no-allow-shlib-undefined", no_argument, NULL,
 416      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 417     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 418     TWO_DASHES },
 419   { {"allow-multiple-definition", no_argument, NULL,
 420      OPTION_ALLOW_MULTIPLE_DEFINITION},
 421     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 422   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 423     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 424   { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
 425     '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
 426   { {"default-imported-symver", no_argument, NULL,
 427       OPTION_DEFAULT_IMPORTED_SYMVER},
 428     '\0', NULL, N_("Create default symbol version for imported symbols"),
 429     TWO_DASHES },
 430   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 431     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 432   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 433     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 434   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 435     '\0', NULL, N_("Create an output file even if errors occur"),
 436     TWO_DASHES },
 437   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 438     '\0', NULL, NULL, NO_HELP },
 439   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 440     '\0', NULL, N_("Only use library directories specified on\n"
 441                    "\t\t\t\tthe command line"), ONE_DASH },
 442   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 443     '\0', N_("TARGET"), N_("Specify target of output file"),
 444     EXACTLY_TWO_DASHES },
 445   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 446     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 447   { {"reduce-memory-overheads", no_argument, NULL,
 448      OPTION_REDUCE_MEMORY_OVERHEADS},
 449     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 450     TWO_DASHES },
 451   { {"relax", no_argument, NULL, OPTION_RELAX},
 452     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 453   { {"retain-symbols-file", required_argument, NULL,
 454      OPTION_RETAIN_SYMBOLS_FILE},
 455     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 456   { {"rpath", required_argument, NULL, OPTION_RPATH},
 457     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 458   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 459     '\0', N_("PATH"), N_("Set link time shared library search path"),
 460     ONE_DASH },
 461   { {"shared", no_argument, NULL, OPTION_SHARED},
 462     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 463   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 464     '\0', NULL, NULL, ONE_DASH },
 465   { {"pie", no_argument, NULL, OPTION_PIE},
 466     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 467   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 468     '\0', NULL, NULL, TWO_DASHES },
 469   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 470     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 471   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 472     '\0', NULL, NULL, NO_HELP },
 473   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 474     '\0', N_("name|alignment"),
 475     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 476   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 477     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 478     TWO_DASHES },
 479   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 480     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 481     TWO_DASHES },
 482   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 483     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 484     TWO_DASHES },
 485   { {"stats", no_argument, NULL, OPTION_STATS},
 486     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 487   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 488     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 489   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 490     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 491   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 492     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 493   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 494     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 495     TWO_DASHES },
 496   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 497     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 498   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 499     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 500   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 501     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 502   { {"unresolved-symbols=<method>", required_argument, NULL,
 503      OPTION_UNRESOLVED_SYMBOLS},
 504     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 505                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 506                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 507   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 508     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 509   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 510     '\0', NULL, NULL, NO_HELP },
 511   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 512     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 513   { {"version-exports-section", required_argument, NULL,
 514      OPTION_VERSION_EXPORTS_SECTION },
 515     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 516                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 517   { {"dynamic-list-data", no_argument, NULL, OPTION_DYNAMIC_LIST_DATA},
 518     '\0', NULL, N_("Add data symbols to dynamic list"), TWO_DASHES },
 519   { {"dynamic-list-cpp-new", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_NEW},
 520     '\0', NULL, N_("Use C++ operator new/delete dynamic list"), TWO_DASHES },
 521   { {"dynamic-list-cpp-typeinfo", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_TYPEINFO},
 522     '\0', NULL, N_("Use C++ typeinfo dynamic list"), TWO_DASHES },
 523   { {"dynamic-list", required_argument, NULL, OPTION_DYNAMIC_LIST},
 524     '\0', N_("FILE"), N_("Read dynamic list"), TWO_DASHES },
 525   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 526     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 527   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 528     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 529     TWO_DASHES },
 530   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 531     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 532   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 533     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 534   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 535     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 536     TWO_DASHES },
 537   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 538     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 539     TWO_DASHES },
 540   { {"warn-unresolved-symbols", no_argument, NULL,
 541      OPTION_WARN_UNRESOLVED_SYMBOLS},
 542     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 543   { {"error-unresolved-symbols", no_argument, NULL,
 544      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 545     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 546   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 547     '\0', NULL, N_("Include all objects from following archives"),
 548     TWO_DASHES },
 549   { {"wrap", required_argument, NULL, OPTION_WRAP},
 550     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 551 };
 552
 553 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 554
 555 void
 556 parse_args (unsigned argc, char **argv)
 557 {
 558   unsigned i;
 559   int is, il, irl;
 560   int ingroup = 0;
 561   char *default_dirlist = NULL;
 562   char *shortopts;
 563   struct option *longopts;
 564   struct option *really_longopts;
 565   int last_optind;
 566   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 567
 568   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 569   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 570   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 571
 572   /* Starting the short option string with '-' is for programs that
 573      expect options and other ARGV-elements in any order and that care about
 574      the ordering of the two.  We describe each non-option ARGV-element
 575      as if it were the argument of an option with character code 1.  */
 576   shortopts[0] = '-';
 577   is = 1;
 578   il = 0;
 579   irl = 0;
 580   for (i = 0; i < OPTION_COUNT; i++)
 581     {
 582       if (ld_options[i].shortopt != '\0')
 583         {
 584           shortopts[is] = ld_options[i].shortopt;
 585           ++is;
 586           if (ld_options[i].opt.has_arg == required_argument
 587               || ld_options[i].opt.has_arg == optional_argument)
 588             {
 589               shortopts[is] = ':';
 590               ++is;
 591               if (ld_options[i].opt.has_arg == optional_argument)
 592                 {
 593                   shortopts[is] = ':';
 594                   ++is;
 595                 }
 596             }
 597         }
 598       if (ld_options[i].opt.name != NULL)
 599         {
 600           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 601             {
 602               really_longopts[irl] = ld_options[i].opt;
 603               ++irl;
 604             }
 605           else
 606             {
 607               longopts[il] = ld_options[i].opt;
 608               ++il;
 609             }
 610         }
 611     }
 612   shortopts[is] = '\0';
 613   longopts[il].name = NULL;
 614   really_longopts[irl].name = NULL;
 615
 616   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 617
 618   /* The -G option is ambiguous on different platforms.  Sometimes it
 619      specifies the largest data size to put into the small data
 620      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 621      the first form takes an argument, while the second does not.
 622
 623      We need to permit the --shared form because on some platforms,
 624      such as Solaris, gcc -shared will pass -G to the linker.
 625
 626      To permit either usage, we look through the argument list.  If we
 627      find -G not followed by a number, we change it into --shared.
 628      This will work for most normal cases.  */
 629   for (i = 1; i < argc; i++)
 630     if (strcmp (argv[i], "-G") == 0
 631         && (i + 1 >= argc
 632             || ! ISDIGIT (argv[i + 1][0])))
 633       argv[i] = (char *) "--shared";
 634
 635   /* Because we permit long options to start with a single dash, and
 636      we have a --library option, and the -l option is conventionally
 637      used with an immediately following argument, we can have bad
 638      results if somebody tries to use -l with a library whose name
 639      happens to start with "ibrary", as in -li.  We avoid problems by
 640      simply turning -l into --library.  This means that users will
 641      have to use two dashes in order to use --library, which is OK
 642      since that's how it is documented.
 643
 644      FIXME: It's possible that this problem can arise for other short
 645      options as well, although the user does always have the recourse
 646      of adding a space between the option and the argument.  */
 647   for (i = 1; i < argc; i++)
 648     {
 649       if (argv[i][0] == '-'
 650           && argv[i][1] == 'l'
 651           && argv[i][2] != '\0')
 652         {
 653           char *n;
 654
 655           n = xmalloc (strlen (argv[i]) + 20);
 656           sprintf (n, "--library=%s", argv[i] + 2);
 657           argv[i] = n;
 658         }
 659     }
 660
 661   last_optind = -1;
 662   while (1)
 663     {
 664       int longind;
 665       int optc;
 666
 667       /* Using last_optind lets us avoid calling ldemul_parse_args
 668          multiple times on a single option, which would lead to
 669          confusion in the internal static variables maintained by
 670          getopt.  This could otherwise happen for an argument like
 671          -nx, in which the -n is parsed as a single option, and we
 672          loop around to pick up the -x.  */
 673       if (optind != last_optind)
 674         if (ldemul_parse_args (argc, argv))
 675           continue;
 676
 677       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 678          can indicate a long option.  */
 679       opterr = 0;
 680       last_optind = optind;
 681       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 682       if (optc == '?')
 683         {
 684           optind = last_optind;
 685           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 686         }
 687
 688       if (ldemul_handle_option (optc))
 689         continue;
 690
 691       if (optc == -1)
 692         break;
 693
 694       switch (optc)
 695         {
 696         case '?':
 697           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 698           /* Fall through.  */
 699
 700         default:
 701           einfo (_("%P%F: use the --help option for usage information\n"));
 702
 703         case 1:                 /* File name.  */
 704           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 705           break;
 706
 707         case OPTION_IGNORE:
 708           break;
 709         case 'a':
 710           /* For HP/UX compatibility.  Actually -a shared should mean
 711              ``use only shared libraries'' but, then, we don't
 712              currently support shared libraries on HP/UX anyhow.  */
 713           if (strcmp (optarg, "archive") == 0)
 714             config.dynamic_link = FALSE;
 715           else if (strcmp (optarg, "shared") == 0
 716                    || strcmp (optarg, "default") == 0)
 717             config.dynamic_link = TRUE;
 718           else
 719             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 720           break;
 721         case OPTION_ASSERT:
 722           /* FIXME: We just ignore these, but we should handle them.  */
 723           if (strcmp (optarg, "definitions") == 0)
 724             ;
 725           else if (strcmp (optarg, "nodefinitions") == 0)
 726             ;
 727           else if (strcmp (optarg, "nosymbolic") == 0)
 728             ;
 729           else if (strcmp (optarg, "pure-text") == 0)
 730             ;
 731           else
 732             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 733           break;
 734         case 'A':
 735           ldfile_add_arch (optarg);
 736           break;
 737         case 'b':
 738           lang_add_target (optarg);
 739           break;
 740         case 'c':
 741           ldfile_open_command_file (optarg);
 742           parser_input = input_mri_script;
 743           yyparse ();
 744           break;
 745         case OPTION_CALL_SHARED:
 746           config.dynamic_link = TRUE;
 747           break;
 748         case OPTION_NON_SHARED:
 749           config.dynamic_link = FALSE;
 750           break;
 751         case OPTION_CREF:
 752           command_line.cref = TRUE;
 753           link_info.notice_all = TRUE;
 754           break;
 755         case 'd':
 756           command_line.force_common_definition = TRUE;
 757           break;
 758         case OPTION_DEFSYM:
 759           lex_string = optarg;
 760           lex_redirect (optarg);
 761           parser_input = input_defsym;
 762           parsing_defsym = 1;
 763           yyparse ();
 764           parsing_defsym = 0;
 765           lex_string = NULL;
 766           break;
 767         case OPTION_DEMANGLE:
 768           demangling = TRUE;
 769           if (optarg != NULL)
 770             {
 771               enum demangling_styles style;
 772
 773               style = cplus_demangle_name_to_style (optarg);
 774               if (style == unknown_demangling)
 775                 einfo (_("%F%P: unknown demangling style `%s'"),
 776                        optarg);
 777
 778               cplus_demangle_set_style (style);
 779             }
 780           break;
 781         case 'I':               /* Used on Solaris.  */
 782         case OPTION_DYNAMIC_LINKER:
 783           command_line.interpreter = optarg;
 784           break;
 785         case OPTION_SYSROOT:
 786           /* Already handled in ldmain.c.  */
 787           break;
 788         case OPTION_EB:
 789           command_line.endian = ENDIAN_BIG;
 790           break;
 791         case OPTION_EL:
 792           command_line.endian = ENDIAN_LITTLE;
 793           break;
 794         case OPTION_EMBEDDED_RELOCS:
 795           command_line.embedded_relocs = TRUE;
 796           break;
 797         case OPTION_EXPORT_DYNAMIC:
 798         case 'E': /* HP/UX compatibility.  */
 799           link_info.export_dynamic = TRUE;
 800           break;
 801         case 'e':
 802           lang_add_entry (optarg, TRUE);
 803           break;
 804         case 'f':
 805           if (command_line.auxiliary_filters == NULL)
 806             {
 807               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 808               command_line.auxiliary_filters[0] = optarg;
 809               command_line.auxiliary_filters[1] = NULL;
 810             }
 811           else
 812             {
 813               int c;
 814               char **p;
 815
 816               c = 0;
 817               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 818                 ++c;
 819               command_line.auxiliary_filters
 820                 = xrealloc (command_line.auxiliary_filters,
 821                             (c + 2) * sizeof (char *));
 822               command_line.auxiliary_filters[c] = optarg;
 823               command_line.auxiliary_filters[c + 1] = NULL;
 824             }
 825           break;
 826         case 'F':
 827           command_line.filter_shlib = optarg;
 828           break;
 829         case OPTION_FORCE_EXE_SUFFIX:
 830           command_line.force_exe_suffix = TRUE;
 831           break;
 832         case 'G':
 833           {
 834             char *end;
 835             g_switch_value = strtoul (optarg, &end, 0);
 836             if (*end)
 837               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 838           }
 839           break;
 840         case 'g':
 841           /* Ignore.  */
 842           break;
 843         case OPTION_GC_SECTIONS:
 844           link_info.gc_sections = TRUE;
 845           break;
 846         case OPTION_PRINT_GC_SECTIONS:
 847           link_info.print_gc_sections = TRUE;
 848           break;
 849         case OPTION_HELP:
 850           help ();
 851           xexit (0);
 852           break;
 853         case 'L':
 854           ldfile_add_library_path (optarg, TRUE);
 855           break;
 856         case 'l':
 857           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 858           break;
 859         case 'M':
 860           config.map_filename = "-";
 861           break;
 862         case 'm':
 863           /* Ignore.  Was handled in a pre-parse.   */
 864           break;
 865         case OPTION_MAP:
 866           config.map_filename = optarg;
 867           break;
 868         case 'N':
 869           config.text_read_only = FALSE;
 870           config.magic_demand_paged = FALSE;
 871           config.dynamic_link = FALSE;
 872           break;
 873         case OPTION_NO_OMAGIC:
 874           config.text_read_only = TRUE;
 875           config.magic_demand_paged = TRUE;
 876           /* NB/ Does not set dynamic_link to TRUE.
 877              Use --call-shared or -Bdynamic for this.  */
 878           break;
 879         case 'n':
 880           config.magic_demand_paged = FALSE;
 881           config.dynamic_link = FALSE;
 882           break;
 883         case OPTION_NO_DEFINE_COMMON:
 884           command_line.inhibit_common_definition = TRUE;
 885           break;
 886         case OPTION_NO_DEMANGLE:
 887           demangling = FALSE;
 888           break;
 889         case OPTION_NO_GC_SECTIONS:
 890           link_info.gc_sections = FALSE;
 891           break;
 892         case OPTION_NO_PRINT_GC_SECTIONS:
 893           link_info.print_gc_sections = FALSE;
 894           break;
 895         case OPTION_NO_KEEP_MEMORY:
 896           link_info.keep_memory = FALSE;
 897           break;
 898         case OPTION_NO_UNDEFINED:
 899           link_info.unresolved_syms_in_objects
 900             = how_to_report_unresolved_symbols;
 901           break;
 902         case OPTION_ALLOW_SHLIB_UNDEFINED:
 903           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 904           break;
 905         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 906           link_info.unresolved_syms_in_shared_libs
 907             = how_to_report_unresolved_symbols;
 908           break;
 909         case OPTION_UNRESOLVED_SYMBOLS:
 910           if (strcmp (optarg, "ignore-all") == 0)
 911             {
 912               link_info.unresolved_syms_in_objects = RM_IGNORE;
 913               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 914             }
 915           else if (strcmp (optarg, "report-all") == 0)
 916             {
 917               link_info.unresolved_syms_in_objects
 918                 = how_to_report_unresolved_symbols;
 919               link_info.unresolved_syms_in_shared_libs
 920                 = how_to_report_unresolved_symbols;
 921             }
 922           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 923             {
 924               link_info.unresolved_syms_in_objects = RM_IGNORE;
 925               link_info.unresolved_syms_in_shared_libs
 926                 = how_to_report_unresolved_symbols;
 927             }
 928           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 929             {
 930               link_info.unresolved_syms_in_objects
 931                 = how_to_report_unresolved_symbols;
 932               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 933             }
 934           else
 935             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 936           break;
 937         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 938           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 939           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 940             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 941           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 942             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 943           break;
 944
 945         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 946           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 947           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 948             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 949           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 950             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 951           break;
 952         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 953           link_info.allow_multiple_definition = TRUE;
 954           break;
 955         case OPTION_NO_UNDEFINED_VERSION:
 956           link_info.allow_undefined_version = FALSE;
 957           break;
 958         case OPTION_DEFAULT_SYMVER:
 959           link_info.create_default_symver = TRUE;
 960           break;
 961         case OPTION_DEFAULT_IMPORTED_SYMVER:
 962           link_info.default_imported_symver = TRUE;
 963           break;
 964         case OPTION_NO_WARN_MISMATCH:
 965           command_line.warn_mismatch = FALSE;
 966           break;
 967         case OPTION_NOINHIBIT_EXEC:
 968           force_make_executable = TRUE;
 969           break;
 970         case OPTION_NOSTDLIB:
 971           config.only_cmd_line_lib_dirs = TRUE;
 972           break;
 973         case OPTION_NO_WHOLE_ARCHIVE:
 974           whole_archive = FALSE;
 975           break;
 976         case 'O':
 977           /* FIXME "-O<non-digits> <value>" used to set the address of
 978              section <non-digits>.  Was this for compatibility with
 979              something, or can we create a new option to do that
 980              (with a syntax similar to -defsym)?
 981              getopt can't handle two args to an option without kludges.  */
 982
 983           /* Enable optimizations of output files.  */
 984           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 985           break;
 986         case 'o':
 987           lang_add_output (optarg, 0);
 988           break;
 989         case OPTION_OFORMAT:
 990           lang_add_output_format (optarg, NULL, NULL, 0);
 991           break;
 992         case 'q':
 993           link_info.emitrelocations = TRUE;
 994           break;
 995         case 'i':
 996         case 'r':
 997           if (optind == last_optind)
 998             /* This can happen if the user put "-rpath,a" on the command
 999                line.  (Or something similar.  The comma is important).
1000                Getopt becomes confused and thinks that this is a -r option
1001                but it cannot parse the text after the -r so it refuses to
1002                increment the optind counter.  Detect this case and issue
1003                an error message here.  We cannot just make this a warning,
1004                increment optind, and continue because getopt is too confused
1005                and will seg-fault the next time around.  */
1006             einfo(_("%P%F: bad -rpath option\n"));
1007
1008           link_info.relocatable = TRUE;
1009           config.build_constructors = FALSE;
1010           config.magic_demand_paged = FALSE;
1011           config.text_read_only = FALSE;
1012           config.dynamic_link = FALSE;
1013           break;
1014         case 'R':
1015           /* The GNU linker traditionally uses -R to mean to include
1016              only the symbols from a file.  The Solaris linker uses -R
1017              to set the path used by the runtime linker to find
1018              libraries.  This is the GNU linker -rpath argument.  We
1019              try to support both simultaneously by checking the file
1020              named.  If it is a directory, rather than a regular file,
1021              we assume -rpath was meant.  */
1022           {
1023             struct stat s;
1024
1025             if (stat (optarg, &s) >= 0
1026                 && ! S_ISDIR (s.st_mode))
1027               {
1028                 lang_add_input_file (optarg,
1029                                      lang_input_file_is_symbols_only_enum,
1030                                      NULL);
1031                 break;
1032               }
1033           }
1034           /* Fall through.  */
1035         case OPTION_RPATH:
1036           if (command_line.rpath == NULL)
1037             command_line.rpath = xstrdup (optarg);
1038           else
1039             {
1040               size_t rpath_len = strlen (command_line.rpath);
1041               size_t optarg_len = strlen (optarg);
1042               char *buf;
1043               char *cp = command_line.rpath;
1044
1045               /* First see whether OPTARG is already in the path.  */
1046               do
1047                 {
1048                   size_t idx = 0;
1049
1050                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
1051                     ++idx;
1052                   if (optarg[idx] == '\0'
1053                       && (cp[idx] == '\0' || cp[idx] == ':'))
1054                     /* We found it.  */
1055                     break;
1056
1057                   /* Not yet found.  */
1058                   cp = strchr (cp, ':');
1059                   if (cp != NULL)
1060                     ++cp;
1061                 }
1062               while (cp != NULL);
1063
1064               if (cp == NULL)
1065                 {
1066                   buf = xmalloc (rpath_len + optarg_len + 2);
1067                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1068                   free (command_line.rpath);
1069                   command_line.rpath = buf;
1070                 }
1071             }
1072           break;
1073         case OPTION_RPATH_LINK:
1074           if (command_line.rpath_link == NULL)
1075             command_line.rpath_link = xstrdup (optarg);
1076           else
1077             {
1078               char *buf;
1079
1080               buf = xmalloc (strlen (command_line.rpath_link)
1081                              + strlen (optarg)
1082                              + 2);
1083               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1084               free (command_line.rpath_link);
1085               command_line.rpath_link = buf;
1086             }
1087           break;
1088         case OPTION_RELAX:
1089           command_line.relax = TRUE;
1090           break;
1091         case OPTION_RETAIN_SYMBOLS_FILE:
1092           add_keepsyms_file (optarg);
1093           break;
1094         case 'S':
1095           link_info.strip = strip_debugger;
1096           break;
1097         case 's':
1098           link_info.strip = strip_all;
1099           break;
1100         case OPTION_STRIP_DISCARDED:
1101           link_info.strip_discarded = TRUE;
1102           break;
1103         case OPTION_NO_STRIP_DISCARDED:
1104           link_info.strip_discarded = FALSE;
1105           break;
1106         case OPTION_SHARED:
1107           if (config.has_shared)
1108             {
1109               link_info.shared = TRUE;
1110               /* When creating a shared library, the default
1111                  behaviour is to ignore any unresolved references.  */
1112               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1113                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1114               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1115                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1116             }
1117           else
1118             einfo (_("%P%F: -shared not supported\n"));
1119           break;
1120         case OPTION_PIE:
1121           if (config.has_shared)
1122             {
1123               link_info.shared = TRUE;
1124               link_info.pie = TRUE;
1125             }
1126           else
1127             einfo (_("%P%F: -pie not supported\n"));
1128           break;
1129         case 'h':               /* Used on Solaris.  */
1130         case OPTION_SONAME:
1131           command_line.soname = optarg;
1132           break;
1133         case OPTION_SORT_COMMON:
1134           config.sort_common = TRUE;
1135           break;
1136         case OPTION_SORT_SECTION:
1137           if (strcmp (optarg, N_("name")) == 0)
1138             sort_section = by_name;
1139           else if (strcmp (optarg, N_("alignment")) == 0)
1140             sort_section = by_alignment;
1141           else
1142             einfo (_("%P%F: invalid section sorting option: %s\n"),
1143                    optarg);
1144           break;
1145         case OPTION_STATS:
1146           config.stats = TRUE;
1147           break;
1148         case OPTION_SYMBOLIC:
1149           command_line.symbolic = symbolic;
1150           break;
1151         case OPTION_SYMBOLIC_FUNCTIONS:
1152           command_line.symbolic = symbolic_functions;
1153           break;
1154         case 't':
1155           trace_files = TRUE;
1156           break;
1157         case 'T':
1158           ldfile_open_command_file (optarg);
1159           parser_input = input_script;
1160           yyparse ();
1161           break;
1162         case OPTION_DEFAULT_SCRIPT:
1163           command_line.default_script = optarg;
1164           break;
1165         case OPTION_SECTION_START:
1166           {
1167             char *optarg2;
1168             char *sec_name;
1169             int len;
1170
1171             /* Check for <something>=<somthing>...  */
1172             optarg2 = strchr (optarg, '=');
1173             if (optarg2 == NULL)
1174               einfo (_("%P%F: invalid argument to option"
1175                        " \"--section-start\"\n"));
1176
1177             optarg2++;
1178
1179             /* So far so good.  Are all the args present?  */
1180             if ((*optarg == '\0') || (*optarg2 == '\0'))
1181               einfo (_("%P%F: missing argument(s) to option"
1182                        " \"--section-start\"\n"));
1183
1184             /* We must copy the section name as set_section_start
1185                doesn't do it for us.  */
1186             len = optarg2 - optarg;
1187             sec_name = xmalloc (len);
1188             memcpy (sec_name, optarg, len - 1);
1189             sec_name[len - 1] = 0;
1190
1191             /* Then set it...  */
1192             set_section_start (sec_name, optarg2);
1193           }
1194           break;
1195         case OPTION_TARGET_HELP:
1196           /* Mention any target specific options.  */
1197           ldemul_list_emulation_options (stdout);
1198           exit (0);
1199         case OPTION_TBSS:
1200           set_segment_start (".bss", optarg);
1201           break;
1202         case OPTION_TDATA:
1203           set_segment_start (".data", optarg);
1204           break;
1205         case OPTION_TTEXT:
1206           set_segment_start (".text", optarg);
1207           break;
1208         case OPTION_TRADITIONAL_FORMAT:
1209           link_info.traditional_format = TRUE;
1210           break;
1211         case OPTION_TASK_LINK:
1212           link_info.task_link = TRUE;
1213           /* Fall through - do an implied -r option.  */
1214         case OPTION_UR:
1215           link_info.relocatable = TRUE;
1216           config.build_constructors = TRUE;
1217           config.magic_demand_paged = FALSE;
1218           config.text_read_only = FALSE;
1219           config.dynamic_link = FALSE;
1220           break;
1221         case 'u':
1222           ldlang_add_undef (optarg);
1223           break;
1224         case OPTION_UNIQUE:
1225           if (optarg != NULL)
1226             lang_add_unique (optarg);
1227           else
1228             config.unique_orphan_sections = TRUE;
1229           break;
1230         case OPTION_VERBOSE:
1231           ldversion (1);
1232           version_printed = TRUE;
1233           trace_file_tries = TRUE;
1234           overflow_cutoff_limit = -2;
1235           break;
1236         case 'v':
1237           ldversion (0);
1238           version_printed = TRUE;
1239           break;
1240         case 'V':
1241           ldversion (1);
1242           version_printed = TRUE;
1243           break;
1244         case OPTION_VERSION:
1245           ldversion (2);
1246           xexit (0);
1247           break;
1248         case OPTION_VERSION_SCRIPT:
1249           /* This option indicates a small script that only specifies
1250              version information.  Read it, but don't assume that
1251              we've 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_version_script;
1259             yyparse ();
1260           }
1261           break;
1262         case OPTION_VERSION_EXPORTS_SECTION:
1263           /* This option records a version symbol to be applied to the
1264              symbols listed for export to be found in the object files
1265              .exports sections.  */
1266           command_line.version_exports_section = optarg;
1267           break;
1268         case OPTION_DYNAMIC_LIST_DATA:
1269           command_line.dynamic_list = dynamic_list_data;
1270           if (command_line.symbolic == symbolic)
1271             command_line.symbolic = symbolic_unset;
1272           break;
1273         case OPTION_DYNAMIC_LIST_CPP_TYPEINFO:
1274           lang_append_dynamic_list_cpp_typeinfo ();
1275           if (command_line.dynamic_list != dynamic_list_data)
1276             command_line.dynamic_list = dynamic_list;
1277           if (command_line.symbolic == symbolic)
1278             command_line.symbolic = symbolic_unset;
1279           break;
1280         case OPTION_DYNAMIC_LIST_CPP_NEW:
1281           lang_append_dynamic_list_cpp_new ();
1282           if (command_line.dynamic_list != dynamic_list_data)
1283             command_line.dynamic_list = dynamic_list;
1284           if (command_line.symbolic == symbolic)
1285             command_line.symbolic = symbolic_unset;
1286           break;
1287         case OPTION_DYNAMIC_LIST:
1288           /* This option indicates a small script that only specifies
1289              a dynamic list.  Read it, but don't assume that we've
1290              seen a linker script.  */
1291           {
1292             FILE *hold_script_handle;
1293
1294             hold_script_handle = saved_script_handle;
1295             ldfile_open_command_file (optarg);
1296             saved_script_handle = hold_script_handle;
1297             parser_input = input_dynamic_list;
1298             yyparse ();
1299           }
1300           if (command_line.dynamic_list != dynamic_list_data)
1301             command_line.dynamic_list = dynamic_list;
1302           if (command_line.symbolic == symbolic)
1303             command_line.symbolic = symbolic_unset;
1304           break;
1305         case OPTION_WARN_COMMON:
1306           config.warn_common = TRUE;
1307           break;
1308         case OPTION_WARN_CONSTRUCTORS:
1309           config.warn_constructors = TRUE;
1310           break;
1311         case OPTION_WARN_FATAL:
1312           config.fatal_warnings = TRUE;
1313           break;
1314         case OPTION_WARN_MULTIPLE_GP:
1315           config.warn_multiple_gp = TRUE;
1316           break;
1317         case OPTION_WARN_ONCE:
1318           config.warn_once = TRUE;
1319           break;
1320         case OPTION_WARN_SECTION_ALIGN:
1321           config.warn_section_align = TRUE;
1322           break;
1323         case OPTION_WARN_SHARED_TEXTREL:
1324           link_info.warn_shared_textrel = TRUE;
1325           break;
1326         case OPTION_WHOLE_ARCHIVE:
1327           whole_archive = TRUE;
1328           break;
1329         case OPTION_ADD_NEEDED:
1330           add_needed = TRUE;
1331           break;
1332         case OPTION_NO_ADD_NEEDED:
1333           add_needed = FALSE;
1334           break;
1335         case OPTION_AS_NEEDED:
1336           as_needed = TRUE;
1337           break;
1338         case OPTION_NO_AS_NEEDED:
1339           as_needed = FALSE;
1340           break;
1341         case OPTION_WRAP:
1342           add_wrap (optarg);
1343           break;
1344         case OPTION_DISCARD_NONE:
1345           link_info.discard = discard_none;
1346           break;
1347         case 'X':
1348           link_info.discard = discard_l;
1349           break;
1350         case 'x':
1351           link_info.discard = discard_all;
1352           break;
1353         case 'Y':
1354           if (CONST_STRNEQ (optarg, "P,"))
1355             optarg += 2;
1356           if (default_dirlist != NULL)
1357             free (default_dirlist);
1358           default_dirlist = xstrdup (optarg);
1359           break;
1360         case 'y':
1361           add_ysym (optarg);
1362           break;
1363         case OPTION_SPARE_DYNAMIC_TAGS:
1364           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1365           break;
1366         case OPTION_SPLIT_BY_RELOC:
1367           if (optarg != NULL)
1368             config.split_by_reloc = strtoul (optarg, NULL, 0);
1369           else
1370             config.split_by_reloc = 32768;
1371           break;
1372         case OPTION_SPLIT_BY_FILE:
1373           if (optarg != NULL)
1374             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1375           else
1376             config.split_by_file = 1;
1377           break;
1378         case OPTION_CHECK_SECTIONS:
1379           command_line.check_section_addresses = TRUE;
1380           break;
1381         case OPTION_NO_CHECK_SECTIONS:
1382           command_line.check_section_addresses = FALSE;
1383           break;
1384         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1385           command_line.accept_unknown_input_arch = TRUE;
1386           break;
1387         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1388           command_line.accept_unknown_input_arch = FALSE;
1389           break;
1390         case '(':
1391           if (ingroup)
1392             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1393
1394           lang_enter_group ();
1395           ingroup = 1;
1396           break;
1397         case ')':
1398           if (! ingroup)
1399             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1400
1401           lang_leave_group ();
1402           ingroup = 0;
1403           break;
1404
1405         case OPTION_INIT:
1406           link_info.init_function = optarg;
1407           break;
1408
1409         case OPTION_FINI:
1410           link_info.fini_function = optarg;
1411           break;
1412
1413         case OPTION_REDUCE_MEMORY_OVERHEADS:
1414           link_info.reduce_memory_overheads = TRUE;
1415           if (config.hash_table_size == 0)
1416             config.hash_table_size = 1021;
1417           break;
1418
1419         case OPTION_HASH_SIZE:
1420           {
1421             bfd_size_type new_size;
1422
1423             new_size = strtoul (optarg, NULL, 0);
1424             if (new_size)
1425               config.hash_table_size = new_size;
1426             else
1427               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1428           }
1429           break;
1430         }
1431     }
1432
1433   if (ingroup)
1434     lang_leave_group ();
1435
1436   if (default_dirlist != NULL)
1437     {
1438       set_default_dirlist (default_dirlist);
1439       free (default_dirlist);
1440     }
1441
1442   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1443     /* FIXME: Should we allow emulations a chance to set this ?  */
1444     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1445
1446   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1447     /* FIXME: Should we allow emulations a chance to set this ?  */
1448     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1449 }
1450
1451 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1452    library search path.  */
1453
1454 static void
1455 set_default_dirlist (char *dirlist_ptr)
1456 {
1457   char *p;
1458
1459   while (1)
1460     {
1461       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1462       if (p != NULL)
1463         *p = '\0';
1464       if (*dirlist_ptr != '\0')
1465         ldfile_add_library_path (dirlist_ptr, TRUE);
1466       if (p == NULL)
1467         break;
1468       dirlist_ptr = p + 1;
1469     }
1470 }
1471
1472 static void
1473 set_section_start (char *sect, char *valstr)
1474 {
1475   const char *end;
1476   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1477   if (*end)
1478     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1479   lang_section_start (sect, exp_intop (val), NULL);
1480 }
1481
1482 static void
1483 set_segment_start (const char *section, char *valstr)
1484 {
1485   const char *name;
1486   const char *end;
1487   segment_type *seg;
1488
1489   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1490   if (*end)
1491     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1492   /* If we already have an entry for this segment, update the existing
1493      value.  */
1494   name = section + 1;
1495   for (seg = segments; seg; seg = seg->next)
1496     if (strcmp (seg->name, name) == 0)
1497       {
1498         seg->value = val;
1499         return;
1500       }
1501   /* There was no existing value so we must create a new segment
1502      entry.  */
1503   seg = stat_alloc (sizeof (*seg));
1504   seg->name = name;
1505   seg->value = val;
1506   seg->used = FALSE;
1507   /* Add it to the linked list of segments.  */
1508   seg->next = segments;
1509   segments = seg;
1510   /* Historically, -Ttext and friends set the base address of a
1511      particular section.  For backwards compatibility, we still do
1512      that.  If a SEGMENT_START directive is seen, the section address
1513      assignment will be disabled.  */
1514   lang_section_start (section, exp_intop (val), seg);
1515 }
1516
1517 \f
1518 /* Print help messages for the options.  */
1519
1520 static void
1521 help (void)
1522 {
1523   unsigned i;
1524   const char **targets, **pp;
1525   int len;
1526
1527   printf (_("Usage: %s [options] file...\n"), program_name);
1528
1529   printf (_("Options:\n"));
1530   for (i = 0; i < OPTION_COUNT; i++)
1531     {
1532       if (ld_options[i].doc != NULL)
1533         {
1534           bfd_boolean comma;
1535           unsigned j;
1536
1537           printf ("  ");
1538
1539           comma = FALSE;
1540           len = 2;
1541
1542           j = i;
1543           do
1544             {
1545               if (ld_options[j].shortopt != '\0'
1546                   && ld_options[j].control != NO_HELP)
1547                 {
1548                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1549                   len += (comma ? 2 : 0) + 2;
1550                   if (ld_options[j].arg != NULL)
1551                     {
1552                       if (ld_options[j].opt.has_arg != optional_argument)
1553                         {
1554                           printf (" ");
1555                           ++len;
1556                         }
1557                       printf ("%s", _(ld_options[j].arg));
1558                       len += strlen (_(ld_options[j].arg));
1559                     }
1560                   comma = TRUE;
1561                 }
1562               ++j;
1563             }
1564           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1565
1566           j = i;
1567           do
1568             {
1569               if (ld_options[j].opt.name != NULL
1570                   && ld_options[j].control != NO_HELP)
1571                 {
1572                   int two_dashes =
1573                     (ld_options[j].control == TWO_DASHES
1574                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1575
1576                   printf ("%s-%s%s",
1577                           comma ? ", " : "",
1578                           two_dashes ? "-" : "",
1579                           ld_options[j].opt.name);
1580                   len += ((comma ? 2 : 0)
1581                           + 1
1582                           + (two_dashes ? 1 : 0)
1583                           + strlen (ld_options[j].opt.name));
1584                   if (ld_options[j].arg != NULL)
1585                     {
1586                       printf (" %s", _(ld_options[j].arg));
1587                       len += 1 + strlen (_(ld_options[j].arg));
1588                     }
1589                   comma = TRUE;
1590                 }
1591               ++j;
1592             }
1593           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1594
1595           if (len >= 30)
1596             {
1597               printf ("\n");
1598               len = 0;
1599             }
1600
1601           for (; len < 30; len++)
1602             putchar (' ');
1603
1604           printf ("%s\n", _(ld_options[i].doc));
1605         }
1606     }
1607   printf (_("  @FILE"));
1608   for (len = strlen ("  @FILE"); len < 30; len++)
1609     putchar (' ');
1610   printf (_("Read options from FILE\n"));
1611
1612   /* Note: Various tools (such as libtool) depend upon the
1613      format of the listings below - do not change them.  */
1614   /* xgettext:c-format */
1615   printf (_("%s: supported targets:"), program_name);
1616   targets = bfd_target_list ();
1617   for (pp = targets; *pp != NULL; pp++)
1618     printf (" %s", *pp);
1619   free (targets);
1620   printf ("\n");
1621
1622   /* xgettext:c-format */
1623   printf (_("%s: supported emulations: "), program_name);
1624   ldemul_list_emulations (stdout);
1625   printf ("\n");
1626
1627   /* xgettext:c-format */
1628   printf (_("%s: emulation specific options:\n"), program_name);
1629   ldemul_list_emulation_options (stdout);
1630   printf ("\n");
1631
1632   if (REPORT_BUGS_TO[0])
1633     printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1634 }