ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004, 2005
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 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_SYSROOT,
  75   OPTION_EB,
  76   OPTION_EL,
  77   OPTION_EMBEDDED_RELOCS,
  78   OPTION_EXPORT_DYNAMIC,
  79   OPTION_HELP,
  80   OPTION_IGNORE,
  81   OPTION_MAP,
  82   OPTION_NO_DEMANGLE,
  83   OPTION_NO_KEEP_MEMORY,
  84   OPTION_NO_WARN_MISMATCH,
  85   OPTION_NOINHIBIT_EXEC,
  86   OPTION_NON_SHARED,
  87   OPTION_NO_WHOLE_ARCHIVE,
  88   OPTION_OFORMAT,
  89   OPTION_RELAX,
  90   OPTION_RETAIN_SYMBOLS_FILE,
  91   OPTION_RPATH,
  92   OPTION_RPATH_LINK,
  93   OPTION_SHARED,
  94   OPTION_SONAME,
  95   OPTION_SORT_COMMON,
  96   OPTION_SORT_SECTION,
  97   OPTION_STATS,
  98   OPTION_SYMBOLIC,
  99   OPTION_TASK_LINK,
 100   OPTION_TBSS,
 101   OPTION_TDATA,
 102   OPTION_TTEXT,
 103   OPTION_TRADITIONAL_FORMAT,
 104   OPTION_UR,
 105   OPTION_VERBOSE,
 106   OPTION_VERSION,
 107   OPTION_VERSION_SCRIPT,
 108   OPTION_VERSION_EXPORTS_SECTION,
 109   OPTION_WARN_COMMON,
 110   OPTION_WARN_CONSTRUCTORS,
 111   OPTION_WARN_FATAL,
 112   OPTION_WARN_MULTIPLE_GP,
 113   OPTION_WARN_ONCE,
 114   OPTION_WARN_SECTION_ALIGN,
 115   OPTION_SPLIT_BY_RELOC,
 116   OPTION_SPLIT_BY_FILE ,
 117   OPTION_WHOLE_ARCHIVE,
 118   OPTION_ADD_NEEDED,
 119   OPTION_NO_ADD_NEEDED,
 120   OPTION_AS_NEEDED,
 121   OPTION_NO_AS_NEEDED,
 122   OPTION_WRAP,
 123   OPTION_FORCE_EXE_SUFFIX,
 124   OPTION_GC_SECTIONS,
 125   OPTION_NO_GC_SECTIONS,
 126   OPTION_HASH_SIZE,
 127   OPTION_CHECK_SECTIONS,
 128   OPTION_NO_CHECK_SECTIONS,
 129   OPTION_NO_UNDEFINED,
 130   OPTION_INIT,
 131   OPTION_FINI,
 132   OPTION_SECTION_START,
 133   OPTION_UNIQUE,
 134   OPTION_TARGET_HELP,
 135   OPTION_ALLOW_SHLIB_UNDEFINED,
 136   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 137   OPTION_ALLOW_MULTIPLE_DEFINITION,
 138   OPTION_NO_UNDEFINED_VERSION,
 139   OPTION_DEFAULT_SYMVER,
 140   OPTION_DEFAULT_IMPORTED_SYMVER,
 141   OPTION_DISCARD_NONE,
 142   OPTION_SPARE_DYNAMIC_TAGS,
 143   OPTION_NO_DEFINE_COMMON,
 144   OPTION_NOSTDLIB,
 145   OPTION_NO_OMAGIC,
 146   OPTION_STRIP_DISCARDED,
 147   OPTION_NO_STRIP_DISCARDED,
 148   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 149   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 150   OPTION_PIE,
 151   OPTION_UNRESOLVED_SYMBOLS,
 152   OPTION_WARN_UNRESOLVED_SYMBOLS,
 153   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 154   OPTION_WARN_SHARED_TEXTREL,
 155   OPTION_REDUCE_MEMORY_OVERHEADS
 156 };
 157
 158 /* The long options.  This structure is used for both the option
 159    parsing and the help text.  */
 160
 161 struct ld_option
 162 {
 163   /* The long option information.  */
 164   struct option opt;
 165   /* The short option with the same meaning ('\0' if none).  */
 166   char shortopt;
 167   /* The name of the argument (NULL if none).  */
 168   const char *arg;
 169   /* The documentation string.  If this is NULL, this is a synonym for
 170      the previous option.  */
 171   const char *doc;
 172   enum {
 173     /* Use one dash before long option name.  */
 174     ONE_DASH,
 175     /* Use two dashes before long option name.  */
 176     TWO_DASHES,
 177     /* Only accept two dashes before the long option name.
 178        This is an overloading of the use of this enum, since originally it
 179        was only intended to tell the --help display function how to display
 180        the long option name.  This feature was added in order to resolve
 181        the confusion about the -omagic command line switch.  Is it setting
 182        the output file name to "magic" or is it setting the NMAGIC flag on
 183        the output ?  It has been decided that it is setting the output file
 184        name, and that if you want to set the NMAGIC flag you should use -N
 185        or --omagic.  */
 186     EXACTLY_TWO_DASHES,
 187     /* Don't mention this option in --help output.  */
 188     NO_HELP
 189   } control;
 190 };
 191
 192 static const struct ld_option ld_options[] =
 193 {
 194   { {NULL, required_argument, NULL, '\0'},
 195     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 196     ONE_DASH },
 197   { {"architecture", required_argument, NULL, 'A'},
 198     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 199   { {"format", required_argument, NULL, 'b'},
 200     'b', N_("TARGET"), N_("Specify target for following input files"),
 201     TWO_DASHES },
 202   { {"mri-script", required_argument, NULL, 'c'},
 203     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 204   { {"dc", no_argument, NULL, 'd'},
 205     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 206   { {"dp", no_argument, NULL, 'd'},
 207     '\0', NULL, NULL, ONE_DASH },
 208   { {"entry", required_argument, NULL, 'e'},
 209     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 210   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 211     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 212   { {"EB", no_argument, NULL, OPTION_EB},
 213     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 214   { {"EL", no_argument, NULL, OPTION_EL},
 215     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 216   { {"auxiliary", required_argument, NULL, 'f'},
 217     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 218     TWO_DASHES },
 219   { {"filter", required_argument, NULL, 'F'},
 220     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 221     TWO_DASHES },
 222   { {NULL, no_argument, NULL, '\0'},
 223     'g', NULL, N_("Ignored"), ONE_DASH },
 224   { {"gpsize", required_argument, NULL, 'G'},
 225     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 226     TWO_DASHES },
 227   { {"soname", required_argument, NULL, OPTION_SONAME},
 228     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 229   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 230     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 231     TWO_DASHES },
 232   { {"library", required_argument, NULL, 'l'},
 233     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 234   { {"library-path", required_argument, NULL, 'L'},
 235     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 236     TWO_DASHES },
 237   { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
 238     '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
 239   { {NULL, required_argument, NULL, '\0'},
 240     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 241   { {"print-map", no_argument, NULL, 'M'},
 242     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 243   { {"nmagic", no_argument, NULL, 'n'},
 244     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 245   { {"omagic", no_argument, NULL, 'N'},
 246     'N', NULL, N_("Do not page align data, do not make text readonly"),
 247     EXACTLY_TWO_DASHES },
 248   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 249     '\0', NULL, N_("Page align data, make text readonly"),
 250     EXACTLY_TWO_DASHES },
 251   { {"output", required_argument, NULL, 'o'},
 252     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 253   { {NULL, required_argument, NULL, '\0'},
 254     'O', NULL, N_("Optimize output file"), ONE_DASH },
 255   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 256     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 257   { {"emit-relocs", no_argument, NULL, 'q'},
 258     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 259   { {"relocatable", no_argument, NULL, 'r'},
 260     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 261   { {NULL, no_argument, NULL, '\0'},
 262     'i', NULL, NULL, ONE_DASH },
 263   { {"just-symbols", required_argument, NULL, 'R'},
 264     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 265     TWO_DASHES },
 266   { {"strip-all", no_argument, NULL, 's'},
 267     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 268   { {"strip-debug", no_argument, NULL, 'S'},
 269     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 270   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 271     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 272   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 273     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 274   { {"trace", no_argument, NULL, 't'},
 275     't', NULL, N_("Trace file opens"), TWO_DASHES },
 276   { {"script", required_argument, NULL, 'T'},
 277     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 278   { {"undefined", required_argument, NULL, 'u'},
 279     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 280     TWO_DASHES },
 281   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 282     '\0', N_("[=SECTION]"),
 283     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 284   { {"Ur", no_argument, NULL, OPTION_UR},
 285     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 286   { {"version", no_argument, NULL, OPTION_VERSION},
 287     'v', NULL, N_("Print version information"), TWO_DASHES },
 288   { {NULL, no_argument, NULL, '\0'},
 289     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 290   { {"discard-all", no_argument, NULL, 'x'},
 291     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 292   { {"discard-locals", no_argument, NULL, 'X'},
 293     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 294   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 295     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 296   { {"trace-symbol", required_argument, NULL, 'y'},
 297     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 298   { {NULL, required_argument, NULL, '\0'},
 299     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 300     ONE_DASH },
 301   { {"start-group", no_argument, NULL, '('},
 302     '(', NULL, N_("Start a group"), TWO_DASHES },
 303   { {"end-group", no_argument, NULL, ')'},
 304     ')', NULL, N_("End a group"), TWO_DASHES },
 305   { {"accept-unknown-input-arch", no_argument, NULL,
 306      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 307     '\0', NULL,
 308     N_("Accept input files whose architecture cannot be determined"),
 309     TWO_DASHES },
 310   { {"no-accept-unknown-input-arch", no_argument, NULL,
 311      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 312     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 313     TWO_DASHES },
 314   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 315     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 316                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 317   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 318     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 319                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 320   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 321     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 322     TWO_DASHES },
 323   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 324     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 325     TWO_DASHES },
 326   { {"assert", required_argument, NULL, OPTION_ASSERT},
 327     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 328   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 329     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 330   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 331     '\0', NULL, NULL, ONE_DASH },
 332   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 333     '\0', NULL, NULL, ONE_DASH },
 334   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 335     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 336   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 337     '\0', NULL, NULL, ONE_DASH },
 338   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 339     '\0', NULL, NULL, ONE_DASH },
 340   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 341     '\0', NULL, NULL, ONE_DASH },
 342   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 343     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 344   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 345     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 346     TWO_DASHES },
 347   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 348     '\0', NULL, N_("Do not check section addresses for overlaps"),
 349     TWO_DASHES },
 350   { {"cref", no_argument, NULL, OPTION_CREF},
 351     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 352   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 353     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 354   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 355     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 356     TWO_DASHES },
 357   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 358     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 359   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 360     '\0', NULL, N_("Treat warnings as errors"),
 361     TWO_DASHES },
 362   { {"fini", required_argument, NULL, OPTION_FINI},
 363     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 364   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 365     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 366   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 367     '\0', NULL, N_("Remove unused sections (on some targets)"),
 368     TWO_DASHES },
 369   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 370     '\0', NULL, N_("Don't remove unused sections (default)"),
 371     TWO_DASHES },
 372   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 373     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 374     TWO_DASHES },
 375   { {"help", no_argument, NULL, OPTION_HELP},
 376     '\0', NULL, N_("Print option help"), TWO_DASHES },
 377   { {"init", required_argument, NULL, OPTION_INIT},
 378     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 379   { {"Map", required_argument, NULL, OPTION_MAP},
 380     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 381   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 382     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 383   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 384     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 385   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 386     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 387   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 388     '\0', NULL, N_("Do not allow unresolved references in object files"),
 389     TWO_DASHES },
 390   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 391     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 392     TWO_DASHES },
 393   { {"no-allow-shlib-undefined", no_argument, NULL,
 394      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 395     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 396     TWO_DASHES },
 397   { {"allow-multiple-definition", no_argument, NULL,
 398      OPTION_ALLOW_MULTIPLE_DEFINITION},
 399     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 400   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 401     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 402   { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
 403     '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
 404   { {"default-imported-symver", no_argument, NULL,
 405       OPTION_DEFAULT_IMPORTED_SYMVER},
 406     '\0', NULL, N_("Create default symbol version for imported symbols"),
 407     TWO_DASHES },
 408   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 409     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 410   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 411     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 412   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 413     '\0', NULL, N_("Create an output file even if errors occur"),
 414     TWO_DASHES },
 415   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 416     '\0', NULL, NULL, NO_HELP },
 417   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 418     '\0', NULL, N_("Only use library directories specified on\n"
 419                    "\t\t\t\tthe command line"), ONE_DASH },
 420   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 421     '\0', N_("TARGET"), N_("Specify target of output file"),
 422     EXACTLY_TWO_DASHES },
 423   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 424     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 425   { {"reduce-memory-overheads", no_argument, NULL,
 426      OPTION_REDUCE_MEMORY_OVERHEADS},
 427     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 428     TWO_DASHES },
 429   { {"relax", no_argument, NULL, OPTION_RELAX},
 430     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 431   { {"retain-symbols-file", required_argument, NULL,
 432      OPTION_RETAIN_SYMBOLS_FILE},
 433     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 434   { {"rpath", required_argument, NULL, OPTION_RPATH},
 435     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 436   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 437     '\0', N_("PATH"), N_("Set link time shared library search path"),
 438     ONE_DASH },
 439   { {"shared", no_argument, NULL, OPTION_SHARED},
 440     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 441   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 442     '\0', NULL, NULL, ONE_DASH },
 443   { {"pie", no_argument, NULL, OPTION_PIE},
 444     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 445   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 446     '\0', NULL, NULL, TWO_DASHES },
 447   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 448     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 449   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 450     '\0', NULL, NULL, NO_HELP },
 451   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 452     '\0', N_("name|alignment"),
 453     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 454   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 455     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 456     TWO_DASHES },
 457   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 458     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 459     TWO_DASHES },
 460   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 461     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 462     TWO_DASHES },
 463   { {"stats", no_argument, NULL, OPTION_STATS},
 464     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 465   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 466     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 467   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 468     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 469   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 470     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 471   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 472     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 473     TWO_DASHES },
 474   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 475     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 476   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 477     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 478   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 479     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 480   { {"unresolved-symbols=<method>", required_argument, NULL,
 481      OPTION_UNRESOLVED_SYMBOLS},
 482     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 483                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 484                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 485   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 486     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 487   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 488     '\0', NULL, NULL, NO_HELP },
 489   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 490     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 491   { {"version-exports-section", required_argument, NULL,
 492      OPTION_VERSION_EXPORTS_SECTION },
 493     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 494                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 495   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 496     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 497   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 498     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 499     TWO_DASHES },
 500   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 501     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 502   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 503     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 504   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 505     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 506     TWO_DASHES },
 507   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 508     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 509     TWO_DASHES },
 510   { {"warn-unresolved-symbols", no_argument, NULL,
 511      OPTION_WARN_UNRESOLVED_SYMBOLS},
 512     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 513   { {"error-unresolved-symbols", no_argument, NULL,
 514      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 515     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 516   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 517     '\0', NULL, N_("Include all objects from following archives"),
 518     TWO_DASHES },
 519   { {"wrap", required_argument, NULL, OPTION_WRAP},
 520     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 521 };
 522
 523 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 524
 525 void
 526 parse_args (unsigned argc, char **argv)
 527 {
 528   unsigned i;
 529   int is, il, irl;
 530   int ingroup = 0;
 531   char *default_dirlist = NULL;
 532   char *shortopts;
 533   struct option *longopts;
 534   struct option *really_longopts;
 535   int last_optind;
 536   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 537
 538   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 539   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 540   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 541
 542   /* Starting the short option string with '-' is for programs that
 543      expect options and other ARGV-elements in any order and that care about
 544      the ordering of the two.  We describe each non-option ARGV-element
 545      as if it were the argument of an option with character code 1.  */
 546   shortopts[0] = '-';
 547   is = 1;
 548   il = 0;
 549   irl = 0;
 550   for (i = 0; i < OPTION_COUNT; i++)
 551     {
 552       if (ld_options[i].shortopt != '\0')
 553         {
 554           shortopts[is] = ld_options[i].shortopt;
 555           ++is;
 556           if (ld_options[i].opt.has_arg == required_argument
 557               || ld_options[i].opt.has_arg == optional_argument)
 558             {
 559               shortopts[is] = ':';
 560               ++is;
 561               if (ld_options[i].opt.has_arg == optional_argument)
 562                 {
 563                   shortopts[is] = ':';
 564                   ++is;
 565                 }
 566             }
 567         }
 568       if (ld_options[i].opt.name != NULL)
 569         {
 570           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 571             {
 572               really_longopts[irl] = ld_options[i].opt;
 573               ++irl;
 574             }
 575           else
 576             {
 577               longopts[il] = ld_options[i].opt;
 578               ++il;
 579             }
 580         }
 581     }
 582   shortopts[is] = '\0';
 583   longopts[il].name = NULL;
 584   really_longopts[irl].name = NULL;
 585
 586   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 587
 588   /* The -G option is ambiguous on different platforms.  Sometimes it
 589      specifies the largest data size to put into the small data
 590      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 591      the first form takes an argument, while the second does not.
 592
 593      We need to permit the --shared form because on some platforms,
 594      such as Solaris, gcc -shared will pass -G to the linker.
 595
 596      To permit either usage, we look through the argument list.  If we
 597      find -G not followed by a number, we change it into --shared.
 598      This will work for most normal cases.  */
 599   for (i = 1; i < argc; i++)
 600     if (strcmp (argv[i], "-G") == 0
 601         && (i + 1 >= argc
 602             || ! ISDIGIT (argv[i + 1][0])))
 603       argv[i] = (char *) "--shared";
 604
 605   /* Because we permit long options to start with a single dash, and
 606      we have a --library option, and the -l option is conventionally
 607      used with an immediately following argument, we can have bad
 608      results if somebody tries to use -l with a library whose name
 609      happens to start with "ibrary", as in -li.  We avoid problems by
 610      simply turning -l into --library.  This means that users will
 611      have to use two dashes in order to use --library, which is OK
 612      since that's how it is documented.
 613
 614      FIXME: It's possible that this problem can arise for other short
 615      options as well, although the user does always have the recourse
 616      of adding a space between the option and the argument.  */
 617   for (i = 1; i < argc; i++)
 618     {
 619       if (argv[i][0] == '-'
 620           && argv[i][1] == 'l'
 621           && argv[i][2] != '\0')
 622         {
 623           char *n;
 624
 625           n = xmalloc (strlen (argv[i]) + 20);
 626           sprintf (n, "--library=%s", argv[i] + 2);
 627           argv[i] = n;
 628         }
 629     }
 630
 631   last_optind = -1;
 632   while (1)
 633     {
 634       int longind;
 635       int optc;
 636
 637       /* Using last_optind lets us avoid calling ldemul_parse_args
 638          multiple times on a single option, which would lead to
 639          confusion in the internal static variables maintained by
 640          getopt.  This could otherwise happen for an argument like
 641          -nx, in which the -n is parsed as a single option, and we
 642          loop around to pick up the -x.  */
 643       if (optind != last_optind)
 644         if (ldemul_parse_args (argc, argv))
 645           continue;
 646
 647       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 648          can indicate a long option.  */
 649       opterr = 0;
 650       last_optind = optind;
 651       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 652       if (optc == '?')
 653         {
 654           optind = last_optind;
 655           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 656         }
 657
 658       if (ldemul_handle_option (optc))
 659         continue;
 660
 661       if (optc == -1)
 662         break;
 663
 664       switch (optc)
 665         {
 666         case '?':
 667           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 668         default:
 669           einfo (_("%P%F: use the --help option for usage information\n"));
 670
 671         case 1:                 /* File name.  */
 672           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 673           break;
 674
 675         case OPTION_IGNORE:
 676           break;
 677         case 'a':
 678           /* For HP/UX compatibility.  Actually -a shared should mean
 679              ``use only shared libraries'' but, then, we don't
 680              currently support shared libraries on HP/UX anyhow.  */
 681           if (strcmp (optarg, "archive") == 0)
 682             config.dynamic_link = FALSE;
 683           else if (strcmp (optarg, "shared") == 0
 684                    || strcmp (optarg, "default") == 0)
 685             config.dynamic_link = TRUE;
 686           else
 687             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 688           break;
 689         case OPTION_ASSERT:
 690           /* FIXME: We just ignore these, but we should handle them.  */
 691           if (strcmp (optarg, "definitions") == 0)
 692             ;
 693           else if (strcmp (optarg, "nodefinitions") == 0)
 694             ;
 695           else if (strcmp (optarg, "nosymbolic") == 0)
 696             ;
 697           else if (strcmp (optarg, "pure-text") == 0)
 698             ;
 699           else
 700             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 701           break;
 702         case 'A':
 703           ldfile_add_arch (optarg);
 704           break;
 705         case 'b':
 706           lang_add_target (optarg);
 707           break;
 708         case 'c':
 709           ldfile_open_command_file (optarg);
 710           parser_input = input_mri_script;
 711           yyparse ();
 712           break;
 713         case OPTION_CALL_SHARED:
 714           config.dynamic_link = TRUE;
 715           break;
 716         case OPTION_NON_SHARED:
 717           config.dynamic_link = FALSE;
 718           break;
 719         case OPTION_CREF:
 720           command_line.cref = TRUE;
 721           link_info.notice_all = TRUE;
 722           break;
 723         case 'd':
 724           command_line.force_common_definition = TRUE;
 725           break;
 726         case OPTION_DEFSYM:
 727           lex_string = optarg;
 728           lex_redirect (optarg);
 729           parser_input = input_defsym;
 730           parsing_defsym = 1;
 731           yyparse ();
 732           parsing_defsym = 0;
 733           lex_string = NULL;
 734           break;
 735         case OPTION_DEMANGLE:
 736           demangling = TRUE;
 737           if (optarg != NULL)
 738             {
 739               enum demangling_styles style;
 740
 741               style = cplus_demangle_name_to_style (optarg);
 742               if (style == unknown_demangling)
 743                 einfo (_("%F%P: unknown demangling style `%s'"),
 744                        optarg);
 745
 746               cplus_demangle_set_style (style);
 747             }
 748           break;
 749         case 'I':               /* Used on Solaris.  */
 750         case OPTION_DYNAMIC_LINKER:
 751           command_line.interpreter = optarg;
 752           break;
 753         case OPTION_SYSROOT:
 754           /* Already handled in ldmain.c.  */
 755           break;
 756         case OPTION_EB:
 757           command_line.endian = ENDIAN_BIG;
 758           break;
 759         case OPTION_EL:
 760           command_line.endian = ENDIAN_LITTLE;
 761           break;
 762         case OPTION_EMBEDDED_RELOCS:
 763           command_line.embedded_relocs = TRUE;
 764           break;
 765         case OPTION_EXPORT_DYNAMIC:
 766         case 'E': /* HP/UX compatibility.  */
 767           link_info.export_dynamic = TRUE;
 768           break;
 769         case 'e':
 770           lang_add_entry (optarg, TRUE);
 771           break;
 772         case 'f':
 773           if (command_line.auxiliary_filters == NULL)
 774             {
 775               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 776               command_line.auxiliary_filters[0] = optarg;
 777               command_line.auxiliary_filters[1] = NULL;
 778             }
 779           else
 780             {
 781               int c;
 782               char **p;
 783
 784               c = 0;
 785               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 786                 ++c;
 787               command_line.auxiliary_filters
 788                 = xrealloc (command_line.auxiliary_filters,
 789                             (c + 2) * sizeof (char *));
 790               command_line.auxiliary_filters[c] = optarg;
 791               command_line.auxiliary_filters[c + 1] = NULL;
 792             }
 793           break;
 794         case 'F':
 795           command_line.filter_shlib = optarg;
 796           break;
 797         case OPTION_FORCE_EXE_SUFFIX:
 798           command_line.force_exe_suffix = TRUE;
 799           break;
 800         case 'G':
 801           {
 802             char *end;
 803             g_switch_value = strtoul (optarg, &end, 0);
 804             if (*end)
 805               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 806           }
 807           break;
 808         case 'g':
 809           /* Ignore.  */
 810           break;
 811         case OPTION_GC_SECTIONS:
 812           command_line.gc_sections = TRUE;
 813           break;
 814         case OPTION_HELP:
 815           help ();
 816           xexit (0);
 817           break;
 818         case 'L':
 819           ldfile_add_library_path (optarg, TRUE);
 820           break;
 821         case 'l':
 822           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 823           break;
 824         case 'M':
 825           config.map_filename = "-";
 826           break;
 827         case 'm':
 828           /* Ignore.  Was handled in a pre-parse.   */
 829           break;
 830         case OPTION_MAP:
 831           config.map_filename = optarg;
 832           break;
 833         case 'N':
 834           config.text_read_only = FALSE;
 835           config.magic_demand_paged = FALSE;
 836           config.dynamic_link = FALSE;
 837           break;
 838         case OPTION_NO_OMAGIC:
 839           config.text_read_only = TRUE;
 840           config.magic_demand_paged = TRUE;
 841           /* NB/ Does not set dynamic_link to TRUE.
 842              Use --call-shared or -Bdynamic for this.  */
 843           break;
 844         case 'n':
 845           config.magic_demand_paged = FALSE;
 846           config.dynamic_link = FALSE;
 847           break;
 848         case OPTION_NO_DEFINE_COMMON:
 849           command_line.inhibit_common_definition = TRUE;
 850           break;
 851         case OPTION_NO_DEMANGLE:
 852           demangling = FALSE;
 853           break;
 854         case OPTION_NO_GC_SECTIONS:
 855           command_line.gc_sections = FALSE;
 856           break;
 857         case OPTION_NO_KEEP_MEMORY:
 858           link_info.keep_memory = FALSE;
 859           break;
 860         case OPTION_NO_UNDEFINED:
 861           link_info.unresolved_syms_in_objects
 862             = how_to_report_unresolved_symbols;
 863           break;
 864         case OPTION_ALLOW_SHLIB_UNDEFINED:
 865           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 866           break;
 867         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 868           link_info.unresolved_syms_in_shared_libs
 869             = how_to_report_unresolved_symbols;
 870           break;
 871         case OPTION_UNRESOLVED_SYMBOLS:
 872           if (strcmp (optarg, "ignore-all") == 0)
 873             {
 874               link_info.unresolved_syms_in_objects = RM_IGNORE;
 875               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 876             }
 877           else if (strcmp (optarg, "report-all") == 0)
 878             {
 879               link_info.unresolved_syms_in_objects
 880                 = how_to_report_unresolved_symbols;
 881               link_info.unresolved_syms_in_shared_libs
 882                 = how_to_report_unresolved_symbols;
 883             }
 884           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 885             {
 886               link_info.unresolved_syms_in_objects = RM_IGNORE;
 887               link_info.unresolved_syms_in_shared_libs
 888                 = how_to_report_unresolved_symbols;
 889             }
 890           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 891             {
 892               link_info.unresolved_syms_in_objects
 893                 = how_to_report_unresolved_symbols;
 894               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 895             }
 896           else
 897             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 898           break;
 899         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 900           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 901           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 902             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 903           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 904             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 905           break;
 906
 907         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 908           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 909           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 910             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 911           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 912             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 913           break;
 914         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 915           link_info.allow_multiple_definition = TRUE;
 916           break;
 917         case OPTION_NO_UNDEFINED_VERSION:
 918           link_info.allow_undefined_version = FALSE;
 919           break;
 920         case OPTION_DEFAULT_SYMVER:
 921           link_info.create_default_symver = TRUE;
 922           break;
 923         case OPTION_DEFAULT_IMPORTED_SYMVER:
 924           link_info.default_imported_symver = TRUE;
 925           break;
 926         case OPTION_NO_WARN_MISMATCH:
 927           command_line.warn_mismatch = FALSE;
 928           break;
 929         case OPTION_NOINHIBIT_EXEC:
 930           force_make_executable = TRUE;
 931           break;
 932         case OPTION_NOSTDLIB:
 933           config.only_cmd_line_lib_dirs = TRUE;
 934           break;
 935         case OPTION_NO_WHOLE_ARCHIVE:
 936           whole_archive = FALSE;
 937           break;
 938         case 'O':
 939           /* FIXME "-O<non-digits> <value>" used to set the address of
 940              section <non-digits>.  Was this for compatibility with
 941              something, or can we create a new option to do that
 942              (with a syntax similar to -defsym)?
 943              getopt can't handle two args to an option without kludges.  */
 944
 945           /* Enable optimizations of output files.  */
 946           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 947           break;
 948         case 'o':
 949           lang_add_output (optarg, 0);
 950           break;
 951         case OPTION_OFORMAT:
 952           lang_add_output_format (optarg, NULL, NULL, 0);
 953           break;
 954         case 'q':
 955           link_info.emitrelocations = TRUE;
 956           break;
 957         case 'i':
 958         case 'r':
 959           if (optind == last_optind)
 960             /* This can happen if the user put "-rpath,a" on the command
 961                line.  (Or something similar.  The comma is important).
 962                Getopt becomes confused and thinks that this is a -r option
 963                but it cannot parse the text after the -r so it refuses to
 964                increment the optind counter.  Detect this case and issue
 965                an error message here.  We cannot just make this a warning,
 966                increment optind, and continue because getopt is too confused
 967                and will seg-fault the next time around.  */
 968             einfo(_("%P%F: bad -rpath option\n"));
 969
 970           link_info.relocatable = TRUE;
 971           config.build_constructors = FALSE;
 972           config.magic_demand_paged = FALSE;
 973           config.text_read_only = FALSE;
 974           config.dynamic_link = FALSE;
 975           break;
 976         case 'R':
 977           /* The GNU linker traditionally uses -R to mean to include
 978              only the symbols from a file.  The Solaris linker uses -R
 979              to set the path used by the runtime linker to find
 980              libraries.  This is the GNU linker -rpath argument.  We
 981              try to support both simultaneously by checking the file
 982              named.  If it is a directory, rather than a regular file,
 983              we assume -rpath was meant.  */
 984           {
 985             struct stat s;
 986
 987             if (stat (optarg, &s) >= 0
 988                 && ! S_ISDIR (s.st_mode))
 989               {
 990                 lang_add_input_file (optarg,
 991                                      lang_input_file_is_symbols_only_enum,
 992                                      NULL);
 993                 break;
 994               }
 995           }
 996           /* Fall through.  */
 997         case OPTION_RPATH:
 998           if (command_line.rpath == NULL)
 999             command_line.rpath = xstrdup (optarg);
1000           else
1001             {
1002               size_t rpath_len = strlen (command_line.rpath);
1003               size_t optarg_len = strlen (optarg);
1004               char *buf;
1005               char *cp = command_line.rpath;
1006
1007               /* First see whether OPTARG is already in the path.  */
1008               do
1009                 {
1010                   size_t idx = 0;
1011
1012                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
1013                     ++idx;
1014                   if (optarg[idx] == '\0'
1015                       && (cp[idx] == '\0' || cp[idx] == ':'))
1016                     /* We found it.  */
1017                     break;
1018
1019                   /* Not yet found.  */
1020                   cp = strchr (cp, ':');
1021                   if (cp != NULL)
1022                     ++cp;
1023                 }
1024               while (cp != NULL);
1025
1026               if (cp == NULL)
1027                 {
1028                   buf = xmalloc (rpath_len + optarg_len + 2);
1029                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1030                   free (command_line.rpath);
1031                   command_line.rpath = buf;
1032                 }
1033             }
1034           break;
1035         case OPTION_RPATH_LINK:
1036           if (command_line.rpath_link == NULL)
1037             command_line.rpath_link = xstrdup (optarg);
1038           else
1039             {
1040               char *buf;
1041
1042               buf = xmalloc (strlen (command_line.rpath_link)
1043                              + strlen (optarg)
1044                              + 2);
1045               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1046               free (command_line.rpath_link);
1047               command_line.rpath_link = buf;
1048             }
1049           break;
1050         case OPTION_RELAX:
1051           command_line.relax = TRUE;
1052           break;
1053         case OPTION_RETAIN_SYMBOLS_FILE:
1054           add_keepsyms_file (optarg);
1055           break;
1056         case 'S':
1057           link_info.strip = strip_debugger;
1058           break;
1059         case 's':
1060           link_info.strip = strip_all;
1061           break;
1062         case OPTION_STRIP_DISCARDED:
1063           link_info.strip_discarded = TRUE;
1064           break;
1065         case OPTION_NO_STRIP_DISCARDED:
1066           link_info.strip_discarded = FALSE;
1067           break;
1068         case OPTION_SHARED:
1069           if (config.has_shared)
1070             {
1071               link_info.shared = TRUE;
1072               /* When creating a shared library, the default
1073                  behaviour is to ignore any unresolved references.  */
1074               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1075                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1076               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1077                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1078             }
1079           else
1080             einfo (_("%P%F: -shared not supported\n"));
1081           break;
1082         case OPTION_PIE:
1083           if (config.has_shared)
1084             {
1085               link_info.shared = TRUE;
1086               link_info.pie = TRUE;
1087             }
1088           else
1089             einfo (_("%P%F: -pie not supported\n"));
1090           break;
1091         case 'h':               /* Used on Solaris.  */
1092         case OPTION_SONAME:
1093           command_line.soname = optarg;
1094           break;
1095         case OPTION_SORT_COMMON:
1096           config.sort_common = TRUE;
1097           break;
1098         case OPTION_SORT_SECTION:
1099           if (strcmp (optarg, N_("name")) == 0)
1100             sort_section = by_name;
1101           else if (strcmp (optarg, N_("alignment")) == 0)
1102             sort_section = by_alignment;
1103           else
1104             einfo (_("%P%F: invalid section sorting option: %s\n"),
1105                    optarg);
1106           break;
1107         case OPTION_STATS:
1108           config.stats = TRUE;
1109           break;
1110         case OPTION_SYMBOLIC:
1111           link_info.symbolic = TRUE;
1112           break;
1113         case 't':
1114           trace_files = TRUE;
1115           break;
1116         case 'T':
1117           ldfile_open_command_file (optarg);
1118           parser_input = input_script;
1119           yyparse ();
1120           break;
1121         case OPTION_SECTION_START:
1122           {
1123             char *optarg2;
1124             char *sec_name;
1125             int len;
1126
1127             /* Check for <something>=<somthing>...  */
1128             optarg2 = strchr (optarg, '=');
1129             if (optarg2 == NULL)
1130               einfo (_("%P%F: invalid argument to option"
1131                        " \"--section-start\"\n"));
1132
1133             optarg2++;
1134
1135             /* So far so good.  Are all the args present?  */
1136             if ((*optarg == '\0') || (*optarg2 == '\0'))
1137               einfo (_("%P%F: missing argument(s) to option"
1138                        " \"--section-start\"\n"));
1139
1140             /* We must copy the section name as set_section_start
1141                doesn't do it for us.  */
1142             len = optarg2 - optarg;
1143             sec_name = xmalloc (len);
1144             memcpy (sec_name, optarg, len - 1);
1145             sec_name[len - 1] = 0;
1146
1147             /* Then set it...  */
1148             set_section_start (sec_name, optarg2);
1149           }
1150           break;
1151         case OPTION_TARGET_HELP:
1152           /* Mention any target specific options.  */
1153           ldemul_list_emulation_options (stdout);
1154           exit (0);
1155         case OPTION_TBSS:
1156           set_segment_start (".bss", optarg);
1157           break;
1158         case OPTION_TDATA:
1159           set_segment_start (".data", optarg);
1160           break;
1161         case OPTION_TTEXT:
1162           set_segment_start (".text", optarg);
1163           break;
1164         case OPTION_TRADITIONAL_FORMAT:
1165           link_info.traditional_format = TRUE;
1166           break;
1167         case OPTION_TASK_LINK:
1168           link_info.task_link = TRUE;
1169           /* Fall through - do an implied -r option.  */
1170         case OPTION_UR:
1171           link_info.relocatable = TRUE;
1172           config.build_constructors = TRUE;
1173           config.magic_demand_paged = FALSE;
1174           config.text_read_only = FALSE;
1175           config.dynamic_link = FALSE;
1176           break;
1177         case 'u':
1178           ldlang_add_undef (optarg);
1179           break;
1180         case OPTION_UNIQUE:
1181           if (optarg != NULL)
1182             lang_add_unique (optarg);
1183           else
1184             config.unique_orphan_sections = TRUE;
1185           break;
1186         case OPTION_VERBOSE:
1187           ldversion (1);
1188           version_printed = TRUE;
1189           trace_file_tries = TRUE;
1190           overflow_cutoff_limit = -2;
1191           break;
1192         case 'v':
1193           ldversion (0);
1194           version_printed = TRUE;
1195           break;
1196         case 'V':
1197           ldversion (1);
1198           version_printed = TRUE;
1199           break;
1200         case OPTION_VERSION:
1201           ldversion (2);
1202           xexit (0);
1203           break;
1204         case OPTION_VERSION_SCRIPT:
1205           /* This option indicates a small script that only specifies
1206              version information.  Read it, but don't assume that
1207              we've seen a linker script.  */
1208           {
1209             FILE *hold_script_handle;
1210
1211             hold_script_handle = saved_script_handle;
1212             ldfile_open_command_file (optarg);
1213             saved_script_handle = hold_script_handle;
1214             parser_input = input_version_script;
1215             yyparse ();
1216           }
1217           break;
1218         case OPTION_VERSION_EXPORTS_SECTION:
1219           /* This option records a version symbol to be applied to the
1220              symbols listed for export to be found in the object files
1221              .exports sections.  */
1222           command_line.version_exports_section = optarg;
1223           break;
1224         case OPTION_WARN_COMMON:
1225           config.warn_common = TRUE;
1226           break;
1227         case OPTION_WARN_CONSTRUCTORS:
1228           config.warn_constructors = TRUE;
1229           break;
1230         case OPTION_WARN_FATAL:
1231           config.fatal_warnings = TRUE;
1232           break;
1233         case OPTION_WARN_MULTIPLE_GP:
1234           config.warn_multiple_gp = TRUE;
1235           break;
1236         case OPTION_WARN_ONCE:
1237           config.warn_once = TRUE;
1238           break;
1239         case OPTION_WARN_SECTION_ALIGN:
1240           config.warn_section_align = TRUE;
1241           break;
1242         case OPTION_WARN_SHARED_TEXTREL:
1243           link_info.warn_shared_textrel = TRUE;
1244           break;
1245         case OPTION_WHOLE_ARCHIVE:
1246           whole_archive = TRUE;
1247           break;
1248         case OPTION_ADD_NEEDED:
1249           add_needed = TRUE;
1250           break;
1251         case OPTION_NO_ADD_NEEDED:
1252           add_needed = FALSE;
1253           break;
1254         case OPTION_AS_NEEDED:
1255           as_needed = TRUE;
1256           break;
1257         case OPTION_NO_AS_NEEDED:
1258           as_needed = FALSE;
1259           break;
1260         case OPTION_WRAP:
1261           add_wrap (optarg);
1262           break;
1263         case OPTION_DISCARD_NONE:
1264           link_info.discard = discard_none;
1265           break;
1266         case 'X':
1267           link_info.discard = discard_l;
1268           break;
1269         case 'x':
1270           link_info.discard = discard_all;
1271           break;
1272         case 'Y':
1273           if (strncmp (optarg, "P,", 2) == 0)
1274             optarg += 2;
1275           if (default_dirlist != NULL)
1276             free (default_dirlist);
1277           default_dirlist = xstrdup (optarg);
1278           break;
1279         case 'y':
1280           add_ysym (optarg);
1281           break;
1282         case OPTION_SPARE_DYNAMIC_TAGS:
1283           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1284           break;
1285         case OPTION_SPLIT_BY_RELOC:
1286           if (optarg != NULL)
1287             config.split_by_reloc = strtoul (optarg, NULL, 0);
1288           else
1289             config.split_by_reloc = 32768;
1290           break;
1291         case OPTION_SPLIT_BY_FILE:
1292           if (optarg != NULL)
1293             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1294           else
1295             config.split_by_file = 1;
1296           break;
1297         case OPTION_CHECK_SECTIONS:
1298           command_line.check_section_addresses = TRUE;
1299           break;
1300         case OPTION_NO_CHECK_SECTIONS:
1301           command_line.check_section_addresses = FALSE;
1302           break;
1303         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1304           command_line.accept_unknown_input_arch = TRUE;
1305           break;
1306         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1307           command_line.accept_unknown_input_arch = FALSE;
1308           break;
1309         case '(':
1310           if (ingroup)
1311             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1312
1313           lang_enter_group ();
1314           ingroup = 1;
1315           break;
1316         case ')':
1317           if (! ingroup)
1318             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1319
1320           lang_leave_group ();
1321           ingroup = 0;
1322           break;
1323
1324         case OPTION_INIT:
1325           link_info.init_function = optarg;
1326           break;
1327
1328         case OPTION_FINI:
1329           link_info.fini_function = optarg;
1330           break;
1331
1332         case OPTION_REDUCE_MEMORY_OVERHEADS:
1333           command_line.reduce_memory_overheads = TRUE;
1334           if (config.hash_table_size == 0)
1335             config.hash_table_size = 1021;
1336           break;
1337
1338         case OPTION_HASH_SIZE:
1339           {
1340             bfd_size_type new_size;
1341
1342             new_size = strtoul (optarg, NULL, 0);
1343             if (new_size)
1344               config.hash_table_size = new_size;
1345             else
1346               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1347           }
1348           break;
1349         }
1350     }
1351
1352   if (ingroup)
1353     lang_leave_group ();
1354
1355   if (default_dirlist != NULL)
1356     {
1357       set_default_dirlist (default_dirlist);
1358       free (default_dirlist);
1359     }
1360
1361   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1362     /* FIXME: Should we allow emulations a chance to set this ?  */
1363     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1364
1365   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1366     /* FIXME: Should we allow emulations a chance to set this ?  */
1367     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1368 }
1369
1370 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1371    library search path.  */
1372
1373 static void
1374 set_default_dirlist (char *dirlist_ptr)
1375 {
1376   char *p;
1377
1378   while (1)
1379     {
1380       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1381       if (p != NULL)
1382         *p = '\0';
1383       if (*dirlist_ptr != '\0')
1384         ldfile_add_library_path (dirlist_ptr, TRUE);
1385       if (p == NULL)
1386         break;
1387       dirlist_ptr = p + 1;
1388     }
1389 }
1390
1391 static void
1392 set_section_start (char *sect, char *valstr)
1393 {
1394   const char *end;
1395   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1396   if (*end)
1397     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1398   lang_section_start (sect, exp_intop (val), NULL);
1399 }
1400
1401 static void
1402 set_segment_start (const char *section, char *valstr)
1403 {
1404   const char *name;
1405   const char *end;
1406   segment_type *seg;
1407
1408   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1409   if (*end)
1410     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1411   /* If we already have an entry for this segment, update the existing
1412      value.  */
1413   name = section + 1;
1414   for (seg = segments; seg; seg = seg->next)
1415     if (strcmp (seg->name, name) == 0)
1416       {
1417         seg->value = val;
1418         return;
1419       }
1420   /* There was no existing value so we must create a new segment
1421      entry.  */
1422   seg = stat_alloc (sizeof (*seg));
1423   seg->name = name;
1424   seg->value = val;
1425   seg->used = FALSE;
1426   /* Add it to the linked list of segments.  */
1427   seg->next = segments;
1428   segments = seg;
1429   /* Historically, -Ttext and friends set the base address of a
1430      particular section.  For backwards compatibility, we still do
1431      that.  If a SEGMENT_START directive is seen, the section address
1432      assignment will be disabled.  */
1433   lang_section_start (section, exp_intop (val), seg);
1434 }
1435
1436 \f
1437 /* Print help messages for the options.  */
1438
1439 static void
1440 help (void)
1441 {
1442   unsigned i;
1443   const char **targets, **pp;
1444
1445   printf (_("Usage: %s [options] file...\n"), program_name);
1446
1447   printf (_("Options:\n"));
1448   for (i = 0; i < OPTION_COUNT; i++)
1449     {
1450       if (ld_options[i].doc != NULL)
1451         {
1452           bfd_boolean comma;
1453           int len;
1454           unsigned j;
1455
1456           printf ("  ");
1457
1458           comma = FALSE;
1459           len = 2;
1460
1461           j = i;
1462           do
1463             {
1464               if (ld_options[j].shortopt != '\0'
1465                   && ld_options[j].control != NO_HELP)
1466                 {
1467                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1468                   len += (comma ? 2 : 0) + 2;
1469                   if (ld_options[j].arg != NULL)
1470                     {
1471                       if (ld_options[j].opt.has_arg != optional_argument)
1472                         {
1473                           printf (" ");
1474                           ++len;
1475                         }
1476                       printf ("%s", _(ld_options[j].arg));
1477                       len += strlen (_(ld_options[j].arg));
1478                     }
1479                   comma = TRUE;
1480                 }
1481               ++j;
1482             }
1483           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1484
1485           j = i;
1486           do
1487             {
1488               if (ld_options[j].opt.name != NULL
1489                   && ld_options[j].control != NO_HELP)
1490                 {
1491                   int two_dashes =
1492                     (ld_options[j].control == TWO_DASHES
1493                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1494
1495                   printf ("%s-%s%s",
1496                           comma ? ", " : "",
1497                           two_dashes ? "-" : "",
1498                           ld_options[j].opt.name);
1499                   len += ((comma ? 2 : 0)
1500                           + 1
1501                           + (two_dashes ? 1 : 0)
1502                           + strlen (ld_options[j].opt.name));
1503                   if (ld_options[j].arg != NULL)
1504                     {
1505                       printf (" %s", _(ld_options[j].arg));
1506                       len += 1 + strlen (_(ld_options[j].arg));
1507                     }
1508                   comma = TRUE;
1509                 }
1510               ++j;
1511             }
1512           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1513
1514           if (len >= 30)
1515             {
1516               printf ("\n");
1517               len = 0;
1518             }
1519
1520           for (; len < 30; len++)
1521             putchar (' ');
1522
1523           printf ("%s\n", _(ld_options[i].doc));
1524         }
1525     }
1526
1527   /* Note: Various tools (such as libtool) depend upon the
1528      format of the listings below - do not change them.  */
1529   /* xgettext:c-format */
1530   printf (_("%s: supported targets:"), program_name);
1531   targets = bfd_target_list ();
1532   for (pp = targets; *pp != NULL; pp++)
1533     printf (" %s", *pp);
1534   free (targets);
1535   printf ("\n");
1536
1537   /* xgettext:c-format */
1538   printf (_("%s: supported emulations: "), program_name);
1539   ldemul_list_emulations (stdout);
1540   printf ("\n");
1541
1542   /* xgettext:c-format */
1543   printf (_("%s: emulation specific options:\n"), program_name);
1544   ldemul_list_emulation_options (stdout);
1545   printf ("\n");
1546
1547   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1548 }