ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libiberty.h"
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "safe-ctype.h"
  29 #include "getopt.h"
  30 #include "bfdlink.h"
  31 #include "ld.h"
  32 #include "ldmain.h"
  33 #include "ldmisc.h"
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include <ldgram.h>
  37 #include "ldlex.h"
  38 #include "ldfile.h"
  39 #include "ldver.h"
  40 #include "ldemul.h"
  41 #include "demangle.h"
  42
  43 #ifndef PATH_SEPARATOR
  44 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  45 #define PATH_SEPARATOR ';'
  46 #else
  47 #define PATH_SEPARATOR ':'
  48 #endif
  49 #endif
  50
  51 /* Somewhere above, sys/stat.h got included . . . .  */
  52 #if !defined(S_ISDIR) && defined(S_IFDIR)
  53 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  54 #endif
  55
  56 static void set_default_dirlist (char *);
  57 static void set_section_start (char *, char *);
  58 static void help (void);
  59
  60 /* Non-zero if we are processing a --defsym from the command line.  */
  61 int parsing_defsym = 0;
  62
  63 /* Codes used for the long options with no short synonyms.  150 isn't
  64    special; it's just an arbitrary non-ASCII char value.  */
  65 enum option_values
  66 {
  67   OPTION_ASSERT = 150,
  68   OPTION_CALL_SHARED,
  69   OPTION_CREF,
  70   OPTION_DEFSYM,
  71   OPTION_DEMANGLE,
  72   OPTION_DYNAMIC_LINKER,
  73   OPTION_EB,
  74   OPTION_EL,
  75   OPTION_EMBEDDED_RELOCS,
  76   OPTION_EXPORT_DYNAMIC,
  77   OPTION_HELP,
  78   OPTION_IGNORE,
  79   OPTION_MAP,
  80   OPTION_NO_DEMANGLE,
  81   OPTION_NO_KEEP_MEMORY,
  82   OPTION_NO_WARN_MISMATCH,
  83   OPTION_NOINHIBIT_EXEC,
  84   OPTION_NON_SHARED,
  85   OPTION_NO_WHOLE_ARCHIVE,
  86   OPTION_OFORMAT,
  87   OPTION_RELAX,
  88   OPTION_RETAIN_SYMBOLS_FILE,
  89   OPTION_RPATH,
  90   OPTION_RPATH_LINK,
  91   OPTION_SHARED,
  92   OPTION_SONAME,
  93   OPTION_SORT_COMMON,
  94   OPTION_SORT_SECTION,
  95   OPTION_STATS,
  96   OPTION_SYMBOLIC,
  97   OPTION_TASK_LINK,
  98   OPTION_TBSS,
  99   OPTION_TDATA,
 100   OPTION_TTEXT,
 101   OPTION_TRADITIONAL_FORMAT,
 102   OPTION_UR,
 103   OPTION_VERBOSE,
 104   OPTION_VERSION,
 105   OPTION_VERSION_SCRIPT,
 106   OPTION_VERSION_EXPORTS_SECTION,
 107   OPTION_WARN_COMMON,
 108   OPTION_WARN_CONSTRUCTORS,
 109   OPTION_WARN_FATAL,
 110   OPTION_WARN_MULTIPLE_GP,
 111   OPTION_WARN_ONCE,
 112   OPTION_WARN_SECTION_ALIGN,
 113   OPTION_SPLIT_BY_RELOC,
 114   OPTION_SPLIT_BY_FILE ,
 115   OPTION_WHOLE_ARCHIVE,
 116   OPTION_ADD_NEEDED,
 117   OPTION_NO_ADD_NEEDED,
 118   OPTION_AS_NEEDED,
 119   OPTION_NO_AS_NEEDED,
 120   OPTION_WRAP,
 121   OPTION_FORCE_EXE_SUFFIX,
 122   OPTION_GC_SECTIONS,
 123   OPTION_NO_GC_SECTIONS,
 124   OPTION_HASH_SIZE,
 125   OPTION_CHECK_SECTIONS,
 126   OPTION_NO_CHECK_SECTIONS,
 127   OPTION_NO_UNDEFINED,
 128   OPTION_INIT,
 129   OPTION_FINI,
 130   OPTION_SECTION_START,
 131   OPTION_UNIQUE,
 132   OPTION_TARGET_HELP,
 133   OPTION_ALLOW_SHLIB_UNDEFINED,
 134   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 135   OPTION_ALLOW_MULTIPLE_DEFINITION,
 136   OPTION_NO_UNDEFINED_VERSION,
 137   OPTION_DISCARD_NONE,
 138   OPTION_SPARE_DYNAMIC_TAGS,
 139   OPTION_NO_DEFINE_COMMON,
 140   OPTION_NOSTDLIB,
 141   OPTION_NO_OMAGIC,
 142   OPTION_STRIP_DISCARDED,
 143   OPTION_NO_STRIP_DISCARDED,
 144   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 145   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 146   OPTION_PIE,
 147   OPTION_UNRESOLVED_SYMBOLS,
 148   OPTION_WARN_UNRESOLVED_SYMBOLS,
 149   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 150   OPTION_WARN_SHARED_TEXTREL,
 151   OPTION_REDUCE_MEMORY_OVERHEADS
 152 };
 153
 154 /* The long options.  This structure is used for both the option
 155    parsing and the help text.  */
 156
 157 struct ld_option
 158 {
 159   /* The long option information.  */
 160   struct option opt;
 161   /* The short option with the same meaning ('\0' if none).  */
 162   char shortopt;
 163   /* The name of the argument (NULL if none).  */
 164   const char *arg;
 165   /* The documentation string.  If this is NULL, this is a synonym for
 166      the previous option.  */
 167   const char *doc;
 168   enum {
 169     /* Use one dash before long option name.  */
 170     ONE_DASH,
 171     /* Use two dashes before long option name.  */
 172     TWO_DASHES,
 173     /* Only accept two dashes before the long option name.
 174        This is an overloading of the use of this enum, since originally it
 175        was only intended to tell the --help display function how to display
 176        the long option name.  This feature was added in order to resolve
 177        the confusion about the -omagic command line switch.  Is it setting
 178        the output file name to "magic" or is it setting the NMAGIC flag on
 179        the output ?  It has been decided that it is setting the output file
 180        name, and that if you want to set the NMAGIC flag you should use -N
 181        or --omagic.  */
 182     EXACTLY_TWO_DASHES,
 183     /* Don't mention this option in --help output.  */
 184     NO_HELP
 185   } control;
 186 };
 187
 188 static const struct ld_option ld_options[] =
 189 {
 190   { {NULL, required_argument, NULL, '\0'},
 191     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 192     ONE_DASH },
 193   { {"architecture", required_argument, NULL, 'A'},
 194     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 195   { {"format", required_argument, NULL, 'b'},
 196     'b', N_("TARGET"), N_("Specify target for following input files"),
 197     TWO_DASHES },
 198   { {"mri-script", required_argument, NULL, 'c'},
 199     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 200   { {"dc", no_argument, NULL, 'd'},
 201     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 202   { {"dp", no_argument, NULL, 'd'},
 203     '\0', NULL, NULL, ONE_DASH },
 204   { {"entry", required_argument, NULL, 'e'},
 205     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 206   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 207     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 208   { {"EB", no_argument, NULL, OPTION_EB},
 209     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 210   { {"EL", no_argument, NULL, OPTION_EL},
 211     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 212   { {"auxiliary", required_argument, NULL, 'f'},
 213     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 214     TWO_DASHES },
 215   { {"filter", required_argument, NULL, 'F'},
 216     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 217     TWO_DASHES },
 218   { {NULL, no_argument, NULL, '\0'},
 219     'g', NULL, N_("Ignored"), ONE_DASH },
 220   { {"gpsize", required_argument, NULL, 'G'},
 221     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 222     TWO_DASHES },
 223   { {"soname", required_argument, NULL, OPTION_SONAME},
 224     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 225   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 226     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 227     TWO_DASHES },
 228   { {"library", required_argument, NULL, 'l'},
 229     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 230   { {"library-path", required_argument, NULL, 'L'},
 231     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 232     TWO_DASHES },
 233   { {NULL, required_argument, NULL, '\0'},
 234     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 235   { {"print-map", no_argument, NULL, 'M'},
 236     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 237   { {"nmagic", no_argument, NULL, 'n'},
 238     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 239   { {"omagic", no_argument, NULL, 'N'},
 240     'N', NULL, N_("Do not page align data, do not make text readonly"),
 241     EXACTLY_TWO_DASHES },
 242   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 243     '\0', NULL, N_("Page align data, make text readonly"),
 244     EXACTLY_TWO_DASHES },
 245   { {"output", required_argument, NULL, 'o'},
 246     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 247   { {NULL, required_argument, NULL, '\0'},
 248     'O', NULL, N_("Optimize output file"), ONE_DASH },
 249   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 250     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 251   { {"emit-relocs", no_argument, NULL, 'q'},
 252     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 253   { {"relocatable", no_argument, NULL, 'r'},
 254     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 255   { {NULL, no_argument, NULL, '\0'},
 256     'i', NULL, NULL, ONE_DASH },
 257   { {"just-symbols", required_argument, NULL, 'R'},
 258     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 259     TWO_DASHES },
 260   { {"strip-all", no_argument, NULL, 's'},
 261     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 262   { {"strip-debug", no_argument, NULL, 'S'},
 263     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 264   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 265     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 266   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 267     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 268   { {"trace", no_argument, NULL, 't'},
 269     't', NULL, N_("Trace file opens"), TWO_DASHES },
 270   { {"script", required_argument, NULL, 'T'},
 271     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 272   { {"undefined", required_argument, NULL, 'u'},
 273     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 274     TWO_DASHES },
 275   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 276     '\0', N_("[=SECTION]"),
 277     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 278   { {"Ur", no_argument, NULL, OPTION_UR},
 279     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 280   { {"version", no_argument, NULL, OPTION_VERSION},
 281     'v', NULL, N_("Print version information"), TWO_DASHES },
 282   { {NULL, no_argument, NULL, '\0'},
 283     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 284   { {"discard-all", no_argument, NULL, 'x'},
 285     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 286   { {"discard-locals", no_argument, NULL, 'X'},
 287     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 288   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 289     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 290   { {"trace-symbol", required_argument, NULL, 'y'},
 291     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 292   { {NULL, required_argument, NULL, '\0'},
 293     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 294     ONE_DASH },
 295   { {"start-group", no_argument, NULL, '('},
 296     '(', NULL, N_("Start a group"), TWO_DASHES },
 297   { {"end-group", no_argument, NULL, ')'},
 298     ')', NULL, N_("End a group"), TWO_DASHES },
 299   { {"accept-unknown-input-arch", no_argument, NULL,
 300      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 301     '\0', NULL,
 302     N_("Accept input files whose architecture cannot be determined"),
 303     TWO_DASHES },
 304   { {"no-accept-unknown-input-arch", no_argument, NULL,
 305      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 306     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 307     TWO_DASHES },
 308   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 309     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 310                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 311   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 312     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 313                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 314   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 315     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 316     TWO_DASHES },
 317   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 318     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 319     TWO_DASHES },
 320   { {"assert", required_argument, NULL, OPTION_ASSERT},
 321     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 322   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 323     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 324   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 325     '\0', NULL, NULL, ONE_DASH },
 326   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 327     '\0', NULL, NULL, ONE_DASH },
 328   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 329     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 330   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 331     '\0', NULL, NULL, ONE_DASH },
 332   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 333     '\0', NULL, NULL, ONE_DASH },
 334   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 335     '\0', NULL, NULL, ONE_DASH },
 336   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 337     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 338   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 339     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 340     TWO_DASHES },
 341   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 342     '\0', NULL, N_("Do not check section addresses for overlaps"),
 343     TWO_DASHES },
 344   { {"cref", no_argument, NULL, OPTION_CREF},
 345     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 346   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 347     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 348   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 349     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 350     TWO_DASHES },
 351   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 352     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 353   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 354     '\0', NULL, N_("Treat warnings as errors"),
 355     TWO_DASHES },
 356   { {"fini", required_argument, NULL, OPTION_FINI},
 357     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 358   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 359     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 360   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 361     '\0', NULL, N_("Remove unused sections (on some targets)"),
 362     TWO_DASHES },
 363   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 364     '\0', NULL, N_("Don't remove unused sections (default)"),
 365     TWO_DASHES },
 366   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 367     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 368     TWO_DASHES },
 369   { {"help", no_argument, NULL, OPTION_HELP},
 370     '\0', NULL, N_("Print option help"), TWO_DASHES },
 371   { {"init", required_argument, NULL, OPTION_INIT},
 372     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 373   { {"Map", required_argument, NULL, OPTION_MAP},
 374     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 375   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 376     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 377   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 378     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 379   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 380     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 381   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 382     '\0', NULL, N_("Do not allow unresolved references in object files"),
 383     TWO_DASHES },
 384   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 385     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 386     TWO_DASHES },
 387   { {"no-allow-shlib-undefined", no_argument, NULL,
 388      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 389     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 390     TWO_DASHES },
 391   { {"allow-multiple-definition", no_argument, NULL,
 392      OPTION_ALLOW_MULTIPLE_DEFINITION},
 393     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 394   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 395     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 396   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 397     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 398   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 399     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 400   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 401     '\0', NULL, N_("Create an output file even if errors occur"),
 402     TWO_DASHES },
 403   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 404     '\0', NULL, NULL, NO_HELP },
 405   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 406     '\0', NULL, N_("Only use library directories specified on\n"
 407                    "\t\t\t\tthe command line"), ONE_DASH },
 408   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 409     '\0', N_("TARGET"), N_("Specify target of output file"),
 410     EXACTLY_TWO_DASHES },
 411   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 412     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 413   { {"reduce-memory-overheads", no_argument, NULL,
 414      OPTION_REDUCE_MEMORY_OVERHEADS},
 415     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 416     TWO_DASHES },
 417   { {"relax", no_argument, NULL, OPTION_RELAX},
 418     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 419   { {"retain-symbols-file", required_argument, NULL,
 420      OPTION_RETAIN_SYMBOLS_FILE},
 421     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 422   { {"rpath", required_argument, NULL, OPTION_RPATH},
 423     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 424   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 425     '\0', N_("PATH"), N_("Set link time shared library search path"),
 426     ONE_DASH },
 427   { {"shared", no_argument, NULL, OPTION_SHARED},
 428     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 429   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 430     '\0', NULL, NULL, ONE_DASH },
 431   { {"pie", no_argument, NULL, OPTION_PIE},
 432     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 433   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 434     '\0', NULL, NULL, TWO_DASHES },
 435   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 436     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 437   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 438     '\0', NULL, NULL, NO_HELP },
 439   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 440     '\0', N_("name|alignment"),
 441     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 442   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 443     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 444     TWO_DASHES },
 445   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 446     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 447     TWO_DASHES },
 448   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 449     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 450     TWO_DASHES },
 451   { {"stats", no_argument, NULL, OPTION_STATS},
 452     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 453   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 454     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 455   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 456     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 457   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 458     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 459   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 460     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 461     TWO_DASHES },
 462   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 463     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 464   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 465     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 466   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 467     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 468   { {"unresolved-symbols=<method>", required_argument, NULL,
 469      OPTION_UNRESOLVED_SYMBOLS},
 470     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 471                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 472                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 473   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 474     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 475   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 476     '\0', NULL, NULL, NO_HELP },
 477   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 478     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 479   { {"version-exports-section", required_argument, NULL,
 480      OPTION_VERSION_EXPORTS_SECTION },
 481     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 482                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 483   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 484     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 485   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 486     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 487     TWO_DASHES },
 488   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 489     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 490   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 491     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 492   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 493     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 494     TWO_DASHES },
 495   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 496     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 497     TWO_DASHES },
 498   { {"warn-unresolved-symbols", no_argument, NULL,
 499      OPTION_WARN_UNRESOLVED_SYMBOLS},
 500     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 501   { {"error-unresolved-symbols", no_argument, NULL,
 502      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 503     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 504   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 505     '\0', NULL, N_("Include all objects from following archives"),
 506     TWO_DASHES },
 507   { {"wrap", required_argument, NULL, OPTION_WRAP},
 508     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 509 };
 510
 511 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 512
 513 void
 514 parse_args (unsigned argc, char **argv)
 515 {
 516   unsigned i;
 517   int is, il, irl;
 518   int ingroup = 0;
 519   char *default_dirlist = NULL;
 520   char *shortopts;
 521   struct option *longopts;
 522   struct option *really_longopts;
 523   int last_optind;
 524   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 525
 526   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 527   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 528   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 529
 530   /* Starting the short option string with '-' is for programs that
 531      expect options and other ARGV-elements in any order and that care about
 532      the ordering of the two.  We describe each non-option ARGV-element
 533      as if it were the argument of an option with character code 1.  */
 534   shortopts[0] = '-';
 535   is = 1;
 536   il = 0;
 537   irl = 0;
 538   for (i = 0; i < OPTION_COUNT; i++)
 539     {
 540       if (ld_options[i].shortopt != '\0')
 541         {
 542           shortopts[is] = ld_options[i].shortopt;
 543           ++is;
 544           if (ld_options[i].opt.has_arg == required_argument
 545               || ld_options[i].opt.has_arg == optional_argument)
 546             {
 547               shortopts[is] = ':';
 548               ++is;
 549               if (ld_options[i].opt.has_arg == optional_argument)
 550                 {
 551                   shortopts[is] = ':';
 552                   ++is;
 553                 }
 554             }
 555         }
 556       if (ld_options[i].opt.name != NULL)
 557         {
 558           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 559             {
 560               really_longopts[irl] = ld_options[i].opt;
 561               ++irl;
 562             }
 563           else
 564             {
 565               longopts[il] = ld_options[i].opt;
 566               ++il;
 567             }
 568         }
 569     }
 570   shortopts[is] = '\0';
 571   longopts[il].name = NULL;
 572   really_longopts[irl].name = NULL;
 573
 574   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 575
 576   /* The -G option is ambiguous on different platforms.  Sometimes it
 577      specifies the largest data size to put into the small data
 578      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 579      the first form takes an argument, while the second does not.
 580
 581      We need to permit the --shared form because on some platforms,
 582      such as Solaris, gcc -shared will pass -G to the linker.
 583
 584      To permit either usage, we look through the argument list.  If we
 585      find -G not followed by a number, we change it into --shared.
 586      This will work for most normal cases.  */
 587   for (i = 1; i < argc; i++)
 588     if (strcmp (argv[i], "-G") == 0
 589         && (i + 1 >= argc
 590             || ! ISDIGIT (argv[i + 1][0])))
 591       argv[i] = (char *) "--shared";
 592
 593   /* Because we permit long options to start with a single dash, and
 594      we have a --library option, and the -l option is conventionally
 595      used with an immediately following argument, we can have bad
 596      results if somebody tries to use -l with a library whose name
 597      happens to start with "ibrary", as in -li.  We avoid problems by
 598      simply turning -l into --library.  This means that users will
 599      have to use two dashes in order to use --library, which is OK
 600      since that's how it is documented.
 601
 602      FIXME: It's possible that this problem can arise for other short
 603      options as well, although the user does always have the recourse
 604      of adding a space between the option and the argument.  */
 605   for (i = 1; i < argc; i++)
 606     {
 607       if (argv[i][0] == '-'
 608           && argv[i][1] == 'l'
 609           && argv[i][2] != '\0')
 610         {
 611           char *n;
 612
 613           n = xmalloc (strlen (argv[i]) + 20);
 614           sprintf (n, "--library=%s", argv[i] + 2);
 615           argv[i] = n;
 616         }
 617     }
 618
 619   last_optind = -1;
 620   while (1)
 621     {
 622       int longind;
 623       int optc;
 624
 625       /* Using last_optind lets us avoid calling ldemul_parse_args
 626          multiple times on a single option, which would lead to
 627          confusion in the internal static variables maintained by
 628          getopt.  This could otherwise happen for an argument like
 629          -nx, in which the -n is parsed as a single option, and we
 630          loop around to pick up the -x.  */
 631       if (optind != last_optind)
 632         if (ldemul_parse_args (argc, argv))
 633           continue;
 634
 635       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 636          can indicate a long option.  */
 637       opterr = 0;
 638       last_optind = optind;
 639       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 640       if (optc == '?')
 641         {
 642           optind = last_optind;
 643           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 644         }
 645
 646       if (ldemul_handle_option (optc))
 647         continue;
 648
 649       if (optc == -1)
 650         break;
 651
 652       switch (optc)
 653         {
 654         case '?':
 655           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 656         default:
 657           einfo (_("%P%F: use the --help option for usage information\n"));
 658
 659         case 1:                 /* File name.  */
 660           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 661           break;
 662
 663         case OPTION_IGNORE:
 664           break;
 665         case 'a':
 666           /* For HP/UX compatibility.  Actually -a shared should mean
 667              ``use only shared libraries'' but, then, we don't
 668              currently support shared libraries on HP/UX anyhow.  */
 669           if (strcmp (optarg, "archive") == 0)
 670             config.dynamic_link = FALSE;
 671           else if (strcmp (optarg, "shared") == 0
 672                    || strcmp (optarg, "default") == 0)
 673             config.dynamic_link = TRUE;
 674           else
 675             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 676           break;
 677         case OPTION_ASSERT:
 678           /* FIXME: We just ignore these, but we should handle them.  */
 679           if (strcmp (optarg, "definitions") == 0)
 680             ;
 681           else if (strcmp (optarg, "nodefinitions") == 0)
 682             ;
 683           else if (strcmp (optarg, "nosymbolic") == 0)
 684             ;
 685           else if (strcmp (optarg, "pure-text") == 0)
 686             ;
 687           else
 688             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 689           break;
 690         case 'A':
 691           ldfile_add_arch (optarg);
 692           break;
 693         case 'b':
 694           lang_add_target (optarg);
 695           break;
 696         case 'c':
 697           ldfile_open_command_file (optarg);
 698           parser_input = input_mri_script;
 699           yyparse ();
 700           break;
 701         case OPTION_CALL_SHARED:
 702           config.dynamic_link = TRUE;
 703           break;
 704         case OPTION_NON_SHARED:
 705           config.dynamic_link = FALSE;
 706           break;
 707         case OPTION_CREF:
 708           command_line.cref = TRUE;
 709           link_info.notice_all = TRUE;
 710           break;
 711         case 'd':
 712           command_line.force_common_definition = TRUE;
 713           break;
 714         case OPTION_DEFSYM:
 715           lex_string = optarg;
 716           lex_redirect (optarg);
 717           parser_input = input_defsym;
 718           parsing_defsym = 1;
 719           yyparse ();
 720           parsing_defsym = 0;
 721           lex_string = NULL;
 722           break;
 723         case OPTION_DEMANGLE:
 724           demangling = TRUE;
 725           if (optarg != NULL)
 726             {
 727               enum demangling_styles style;
 728
 729               style = cplus_demangle_name_to_style (optarg);
 730               if (style == unknown_demangling)
 731                 einfo (_("%F%P: unknown demangling style `%s'"),
 732                        optarg);
 733
 734               cplus_demangle_set_style (style);
 735             }
 736           break;
 737         case 'I':               /* Used on Solaris.  */
 738         case OPTION_DYNAMIC_LINKER:
 739           command_line.interpreter = optarg;
 740           break;
 741         case OPTION_EB:
 742           command_line.endian = ENDIAN_BIG;
 743           break;
 744         case OPTION_EL:
 745           command_line.endian = ENDIAN_LITTLE;
 746           break;
 747         case OPTION_EMBEDDED_RELOCS:
 748           command_line.embedded_relocs = TRUE;
 749           break;
 750         case OPTION_EXPORT_DYNAMIC:
 751         case 'E': /* HP/UX compatibility.  */
 752           link_info.export_dynamic = TRUE;
 753           break;
 754         case 'e':
 755           lang_add_entry (optarg, TRUE);
 756           break;
 757         case 'f':
 758           if (command_line.auxiliary_filters == NULL)
 759             {
 760               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 761               command_line.auxiliary_filters[0] = optarg;
 762               command_line.auxiliary_filters[1] = NULL;
 763             }
 764           else
 765             {
 766               int c;
 767               char **p;
 768
 769               c = 0;
 770               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 771                 ++c;
 772               command_line.auxiliary_filters
 773                 = xrealloc (command_line.auxiliary_filters,
 774                             (c + 2) * sizeof (char *));
 775               command_line.auxiliary_filters[c] = optarg;
 776               command_line.auxiliary_filters[c + 1] = NULL;
 777             }
 778           break;
 779         case 'F':
 780           command_line.filter_shlib = optarg;
 781           break;
 782         case OPTION_FORCE_EXE_SUFFIX:
 783           command_line.force_exe_suffix = TRUE;
 784           break;
 785         case 'G':
 786           {
 787             char *end;
 788             g_switch_value = strtoul (optarg, &end, 0);
 789             if (*end)
 790               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 791           }
 792           break;
 793         case 'g':
 794           /* Ignore.  */
 795           break;
 796         case OPTION_GC_SECTIONS:
 797           command_line.gc_sections = TRUE;
 798           break;
 799         case OPTION_HELP:
 800           help ();
 801           xexit (0);
 802           break;
 803         case 'L':
 804           ldfile_add_library_path (optarg, TRUE);
 805           break;
 806         case 'l':
 807           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 808           break;
 809         case 'M':
 810           config.map_filename = "-";
 811           break;
 812         case 'm':
 813           /* Ignore.  Was handled in a pre-parse.   */
 814           break;
 815         case OPTION_MAP:
 816           config.map_filename = optarg;
 817           break;
 818         case 'N':
 819           config.text_read_only = FALSE;
 820           config.magic_demand_paged = FALSE;
 821           config.dynamic_link = FALSE;
 822           break;
 823         case OPTION_NO_OMAGIC:
 824           config.text_read_only = TRUE;
 825           config.magic_demand_paged = TRUE;
 826           /* NB/ Does not set dynamic_link to TRUE.
 827              Use --call-shared or -Bdynamic for this.  */
 828           break;
 829         case 'n':
 830           config.magic_demand_paged = FALSE;
 831           config.dynamic_link = FALSE;
 832           break;
 833         case OPTION_NO_DEFINE_COMMON:
 834           command_line.inhibit_common_definition = TRUE;
 835           break;
 836         case OPTION_NO_DEMANGLE:
 837           demangling = FALSE;
 838           break;
 839         case OPTION_NO_GC_SECTIONS:
 840           command_line.gc_sections = FALSE;
 841           break;
 842         case OPTION_NO_KEEP_MEMORY:
 843           link_info.keep_memory = FALSE;
 844           break;
 845         case OPTION_NO_UNDEFINED:
 846           link_info.unresolved_syms_in_objects
 847             = how_to_report_unresolved_symbols;
 848           break;
 849         case OPTION_ALLOW_SHLIB_UNDEFINED:
 850           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 851           break;
 852         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 853           link_info.unresolved_syms_in_shared_libs
 854             = how_to_report_unresolved_symbols;
 855           break;
 856         case OPTION_UNRESOLVED_SYMBOLS:
 857           if (strcmp (optarg, "ignore-all") == 0)
 858             {
 859               link_info.unresolved_syms_in_objects = RM_IGNORE;
 860               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 861             }
 862           else if (strcmp (optarg, "report-all") == 0)
 863             {
 864               link_info.unresolved_syms_in_objects
 865                 = how_to_report_unresolved_symbols;
 866               link_info.unresolved_syms_in_shared_libs
 867                 = how_to_report_unresolved_symbols;
 868             }
 869           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 870             {
 871               link_info.unresolved_syms_in_objects = RM_IGNORE;
 872               link_info.unresolved_syms_in_shared_libs
 873                 = how_to_report_unresolved_symbols;
 874             }
 875           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 876             {
 877               link_info.unresolved_syms_in_objects
 878                 = how_to_report_unresolved_symbols;
 879               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 880             }
 881           else
 882             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 883           break;
 884         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 885           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 886           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 887             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 888           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 889             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 890           break;
 891
 892         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 893           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 894           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 895             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 896           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 897             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 898           break;
 899         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 900           link_info.allow_multiple_definition = TRUE;
 901           break;
 902         case OPTION_NO_UNDEFINED_VERSION:
 903           link_info.allow_undefined_version = FALSE;
 904           break;
 905         case OPTION_NO_WARN_MISMATCH:
 906           command_line.warn_mismatch = FALSE;
 907           break;
 908         case OPTION_NOINHIBIT_EXEC:
 909           force_make_executable = TRUE;
 910           break;
 911         case OPTION_NOSTDLIB:
 912           config.only_cmd_line_lib_dirs = TRUE;
 913           break;
 914         case OPTION_NO_WHOLE_ARCHIVE:
 915           whole_archive = FALSE;
 916           break;
 917         case 'O':
 918           /* FIXME "-O<non-digits> <value>" used to set the address of
 919              section <non-digits>.  Was this for compatibility with
 920              something, or can we create a new option to do that
 921              (with a syntax similar to -defsym)?
 922              getopt can't handle two args to an option without kludges.  */
 923
 924           /* Enable optimizations of output files.  */
 925           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 926           break;
 927         case 'o':
 928           lang_add_output (optarg, 0);
 929           break;
 930         case OPTION_OFORMAT:
 931           lang_add_output_format (optarg, NULL, NULL, 0);
 932           break;
 933         case 'q':
 934           link_info.emitrelocations = TRUE;
 935           break;
 936         case 'i':
 937         case 'r':
 938           if (optind == last_optind)
 939             /* This can happen if the user put "-rpath,a" on the command
 940                line.  (Or something similar.  The comma is important).
 941                Getopt becomes confused and thinks that this is a -r option
 942                but it cannot parse the text after the -r so it refuses to
 943                increment the optind counter.  Detect this case and issue
 944                an error message here.  We cannot just make this a warning,
 945                increment optind, and continue because getopt is too confused
 946                and will seg-fault the next time around.  */
 947             einfo(_("%P%F: bad -rpath option\n"));
 948
 949           link_info.relocatable = TRUE;
 950           config.build_constructors = FALSE;
 951           config.magic_demand_paged = FALSE;
 952           config.text_read_only = FALSE;
 953           config.dynamic_link = FALSE;
 954           break;
 955         case 'R':
 956           /* The GNU linker traditionally uses -R to mean to include
 957              only the symbols from a file.  The Solaris linker uses -R
 958              to set the path used by the runtime linker to find
 959              libraries.  This is the GNU linker -rpath argument.  We
 960              try to support both simultaneously by checking the file
 961              named.  If it is a directory, rather than a regular file,
 962              we assume -rpath was meant.  */
 963           {
 964             struct stat s;
 965
 966             if (stat (optarg, &s) >= 0
 967                 && ! S_ISDIR (s.st_mode))
 968               {
 969                 lang_add_input_file (optarg,
 970                                      lang_input_file_is_symbols_only_enum,
 971                                      NULL);
 972                 break;
 973               }
 974           }
 975           /* Fall through.  */
 976         case OPTION_RPATH:
 977           if (command_line.rpath == NULL)
 978             command_line.rpath = xstrdup (optarg);
 979           else
 980             {
 981               size_t rpath_len = strlen (command_line.rpath);
 982               size_t optarg_len = strlen (optarg);
 983               char *buf;
 984               char *cp = command_line.rpath;
 985
 986               /* First see whether OPTARG is already in the path.  */
 987               do
 988                 {
 989                   size_t idx = 0;
 990
 991                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 992                     ++idx;
 993                   if (optarg[idx] == '\0'
 994                       && (cp[idx] == '\0' || cp[idx] == ':'))
 995                     /* We found it.  */
 996                     break;
 997
 998                   /* Not yet found.  */
 999                   cp = strchr (cp, ':');
1000                   if (cp != NULL)
1001                     ++cp;
1002                 }
1003               while (cp != NULL);
1004
1005               if (cp == NULL)
1006                 {
1007                   buf = xmalloc (rpath_len + optarg_len + 2);
1008                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1009                   free (command_line.rpath);
1010                   command_line.rpath = buf;
1011                 }
1012             }
1013           break;
1014         case OPTION_RPATH_LINK:
1015           if (command_line.rpath_link == NULL)
1016             command_line.rpath_link = xstrdup (optarg);
1017           else
1018             {
1019               char *buf;
1020
1021               buf = xmalloc (strlen (command_line.rpath_link)
1022                              + strlen (optarg)
1023                              + 2);
1024               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1025               free (command_line.rpath_link);
1026               command_line.rpath_link = buf;
1027             }
1028           break;
1029         case OPTION_RELAX:
1030           command_line.relax = TRUE;
1031           break;
1032         case OPTION_RETAIN_SYMBOLS_FILE:
1033           add_keepsyms_file (optarg);
1034           break;
1035         case 'S':
1036           link_info.strip = strip_debugger;
1037           break;
1038         case 's':
1039           link_info.strip = strip_all;
1040           break;
1041         case OPTION_STRIP_DISCARDED:
1042           link_info.strip_discarded = TRUE;
1043           break;
1044         case OPTION_NO_STRIP_DISCARDED:
1045           link_info.strip_discarded = FALSE;
1046           break;
1047         case OPTION_SHARED:
1048           if (config.has_shared)
1049             {
1050               link_info.shared = TRUE;
1051               /* When creating a shared library, the default
1052                  behaviour is to ignore any unresolved references.  */
1053               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1054                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1055               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1056                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1057             }
1058           else
1059             einfo (_("%P%F: -shared not supported\n"));
1060           break;
1061         case OPTION_PIE:
1062           if (config.has_shared)
1063             {
1064               link_info.shared = TRUE;
1065               link_info.pie = TRUE;
1066             }
1067           else
1068             einfo (_("%P%F: -pie not supported\n"));
1069           break;
1070         case 'h':               /* Used on Solaris.  */
1071         case OPTION_SONAME:
1072           command_line.soname = optarg;
1073           break;
1074         case OPTION_SORT_COMMON:
1075           config.sort_common = TRUE;
1076           break;
1077         case OPTION_SORT_SECTION:
1078           if (strcmp (optarg, N_("name")) == 0)
1079             sort_section = by_name;
1080           else if (strcmp (optarg, N_("alignment")) == 0)
1081             sort_section = by_alignment;
1082           else
1083             einfo (_("%P%F: invalid section sorting option: %s\n"),
1084                    optarg);
1085           break;
1086         case OPTION_STATS:
1087           config.stats = TRUE;
1088           break;
1089         case OPTION_SYMBOLIC:
1090           link_info.symbolic = TRUE;
1091           break;
1092         case 't':
1093           trace_files = TRUE;
1094           break;
1095         case 'T':
1096           ldfile_open_command_file (optarg);
1097           parser_input = input_script;
1098           yyparse ();
1099           break;
1100         case OPTION_SECTION_START:
1101           {
1102             char *optarg2;
1103             char *sec_name;
1104             int len;
1105
1106             /* Check for <something>=<somthing>...  */
1107             optarg2 = strchr (optarg, '=');
1108             if (optarg2 == NULL)
1109               einfo (_("%P%F: invalid argument to option"
1110                        " \"--section-start\"\n"));
1111
1112             optarg2++;
1113
1114             /* So far so good.  Are all the args present?  */
1115             if ((*optarg == '\0') || (*optarg2 == '\0'))
1116               einfo (_("%P%F: missing argument(s) to option"
1117                        " \"--section-start\"\n"));
1118
1119             /* We must copy the section name as set_section_start
1120                doesn't do it for us.  */
1121             len = optarg2 - optarg;
1122             sec_name = xmalloc (len);
1123             memcpy (sec_name, optarg, len - 1);
1124             sec_name[len - 1] = 0;
1125
1126             /* Then set it...  */
1127             set_section_start (sec_name, optarg2);
1128           }
1129           break;
1130         case OPTION_TARGET_HELP:
1131           /* Mention any target specific options.  */
1132           ldemul_list_emulation_options (stdout);
1133           exit (0);
1134         case OPTION_TBSS:
1135           set_section_start (".bss", optarg);
1136           break;
1137         case OPTION_TDATA:
1138           set_section_start (".data", optarg);
1139           break;
1140         case OPTION_TTEXT:
1141           set_section_start (".text", optarg);
1142           break;
1143         case OPTION_TRADITIONAL_FORMAT:
1144           link_info.traditional_format = TRUE;
1145           break;
1146         case OPTION_TASK_LINK:
1147           link_info.task_link = TRUE;
1148           /* Fall through - do an implied -r option.  */
1149         case OPTION_UR:
1150           link_info.relocatable = TRUE;
1151           config.build_constructors = TRUE;
1152           config.magic_demand_paged = FALSE;
1153           config.text_read_only = FALSE;
1154           config.dynamic_link = FALSE;
1155           break;
1156         case 'u':
1157           ldlang_add_undef (optarg);
1158           break;
1159         case OPTION_UNIQUE:
1160           if (optarg != NULL)
1161             lang_add_unique (optarg);
1162           else
1163             config.unique_orphan_sections = TRUE;
1164           break;
1165         case OPTION_VERBOSE:
1166           ldversion (1);
1167           version_printed = TRUE;
1168           trace_file_tries = TRUE;
1169           overflow_cutoff_limit = -2;
1170           break;
1171         case 'v':
1172           ldversion (0);
1173           version_printed = TRUE;
1174           break;
1175         case 'V':
1176           ldversion (1);
1177           version_printed = TRUE;
1178           break;
1179         case OPTION_VERSION:
1180           ldversion (2);
1181           xexit (0);
1182           break;
1183         case OPTION_VERSION_SCRIPT:
1184           /* This option indicates a small script that only specifies
1185              version information.  Read it, but don't assume that
1186              we've seen a linker script.  */
1187           {
1188             FILE *hold_script_handle;
1189
1190             hold_script_handle = saved_script_handle;
1191             ldfile_open_command_file (optarg);
1192             saved_script_handle = hold_script_handle;
1193             parser_input = input_version_script;
1194             yyparse ();
1195           }
1196           break;
1197         case OPTION_VERSION_EXPORTS_SECTION:
1198           /* This option records a version symbol to be applied to the
1199              symbols listed for export to be found in the object files
1200              .exports sections.  */
1201           command_line.version_exports_section = optarg;
1202           break;
1203         case OPTION_WARN_COMMON:
1204           config.warn_common = TRUE;
1205           break;
1206         case OPTION_WARN_CONSTRUCTORS:
1207           config.warn_constructors = TRUE;
1208           break;
1209         case OPTION_WARN_FATAL:
1210           config.fatal_warnings = TRUE;
1211           break;
1212         case OPTION_WARN_MULTIPLE_GP:
1213           config.warn_multiple_gp = TRUE;
1214           break;
1215         case OPTION_WARN_ONCE:
1216           config.warn_once = TRUE;
1217           break;
1218         case OPTION_WARN_SECTION_ALIGN:
1219           config.warn_section_align = TRUE;
1220           break;
1221         case OPTION_WARN_SHARED_TEXTREL:
1222           link_info.warn_shared_textrel = TRUE;
1223           break;
1224         case OPTION_WHOLE_ARCHIVE:
1225           whole_archive = TRUE;
1226           break;
1227         case OPTION_ADD_NEEDED:
1228           add_needed = TRUE;
1229           break;
1230         case OPTION_NO_ADD_NEEDED:
1231           add_needed = FALSE;
1232           break;
1233         case OPTION_AS_NEEDED:
1234           as_needed = TRUE;
1235           break;
1236         case OPTION_NO_AS_NEEDED:
1237           as_needed = FALSE;
1238           break;
1239         case OPTION_WRAP:
1240           add_wrap (optarg);
1241           break;
1242         case OPTION_DISCARD_NONE:
1243           link_info.discard = discard_none;
1244           break;
1245         case 'X':
1246           link_info.discard = discard_l;
1247           break;
1248         case 'x':
1249           link_info.discard = discard_all;
1250           break;
1251         case 'Y':
1252           if (strncmp (optarg, "P,", 2) == 0)
1253             optarg += 2;
1254           if (default_dirlist != NULL)
1255             free (default_dirlist);
1256           default_dirlist = xstrdup (optarg);
1257           break;
1258         case 'y':
1259           add_ysym (optarg);
1260           break;
1261         case OPTION_SPARE_DYNAMIC_TAGS:
1262           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1263           break;
1264         case OPTION_SPLIT_BY_RELOC:
1265           if (optarg != NULL)
1266             config.split_by_reloc = strtoul (optarg, NULL, 0);
1267           else
1268             config.split_by_reloc = 32768;
1269           break;
1270         case OPTION_SPLIT_BY_FILE:
1271           if (optarg != NULL)
1272             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1273           else
1274             config.split_by_file = 1;
1275           break;
1276         case OPTION_CHECK_SECTIONS:
1277           command_line.check_section_addresses = TRUE;
1278           break;
1279         case OPTION_NO_CHECK_SECTIONS:
1280           command_line.check_section_addresses = FALSE;
1281           break;
1282         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1283           command_line.accept_unknown_input_arch = TRUE;
1284           break;
1285         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1286           command_line.accept_unknown_input_arch = FALSE;
1287           break;
1288         case '(':
1289           if (ingroup)
1290             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1291
1292           lang_enter_group ();
1293           ingroup = 1;
1294           break;
1295         case ')':
1296           if (! ingroup)
1297             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1298
1299           lang_leave_group ();
1300           ingroup = 0;
1301           break;
1302
1303         case OPTION_INIT:
1304           link_info.init_function = optarg;
1305           break;
1306
1307         case OPTION_FINI:
1308           link_info.fini_function = optarg;
1309           break;
1310
1311         case OPTION_REDUCE_MEMORY_OVERHEADS:
1312           command_line.reduce_memory_overheads = TRUE;
1313           if (config.hash_table_size == 0)
1314             config.hash_table_size = 1021;
1315           break;
1316
1317         case OPTION_HASH_SIZE:
1318           {
1319             bfd_size_type new_size;
1320
1321             new_size = strtoul (optarg, NULL, 0);
1322             if (new_size)
1323               config.hash_table_size = new_size;
1324             else
1325               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1326           }
1327           break;
1328         }
1329     }
1330
1331   if (ingroup)
1332     lang_leave_group ();
1333
1334   if (default_dirlist != NULL)
1335     {
1336       set_default_dirlist (default_dirlist);
1337       free (default_dirlist);
1338     }
1339
1340   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1341     /* FIXME: Should we allow emulations a chance to set this ?  */
1342     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1343
1344   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1345     /* FIXME: Should we allow emulations a chance to set this ?  */
1346     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1347 }
1348
1349 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1350    library search path.  */
1351
1352 static void
1353 set_default_dirlist (char *dirlist_ptr)
1354 {
1355   char *p;
1356
1357   while (1)
1358     {
1359       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1360       if (p != NULL)
1361         *p = '\0';
1362       if (*dirlist_ptr != '\0')
1363         ldfile_add_library_path (dirlist_ptr, TRUE);
1364       if (p == NULL)
1365         break;
1366       dirlist_ptr = p + 1;
1367     }
1368 }
1369
1370 static void
1371 set_section_start (char *sect, char *valstr)
1372 {
1373   const char *end;
1374   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1375   if (*end)
1376     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1377   lang_section_start (sect, exp_intop (val));
1378 }
1379 \f
1380 /* Print help messages for the options.  */
1381
1382 static void
1383 help (void)
1384 {
1385   unsigned i;
1386   const char **targets, **pp;
1387
1388   printf (_("Usage: %s [options] file...\n"), program_name);
1389
1390   printf (_("Options:\n"));
1391   for (i = 0; i < OPTION_COUNT; i++)
1392     {
1393       if (ld_options[i].doc != NULL)
1394         {
1395           bfd_boolean comma;
1396           int len;
1397           unsigned j;
1398
1399           printf ("  ");
1400
1401           comma = FALSE;
1402           len = 2;
1403
1404           j = i;
1405           do
1406             {
1407               if (ld_options[j].shortopt != '\0'
1408                   && ld_options[j].control != NO_HELP)
1409                 {
1410                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1411                   len += (comma ? 2 : 0) + 2;
1412                   if (ld_options[j].arg != NULL)
1413                     {
1414                       if (ld_options[j].opt.has_arg != optional_argument)
1415                         {
1416                           printf (" ");
1417                           ++len;
1418                         }
1419                       printf ("%s", _(ld_options[j].arg));
1420                       len += strlen (_(ld_options[j].arg));
1421                     }
1422                   comma = TRUE;
1423                 }
1424               ++j;
1425             }
1426           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1427
1428           j = i;
1429           do
1430             {
1431               if (ld_options[j].opt.name != NULL
1432                   && ld_options[j].control != NO_HELP)
1433                 {
1434                   int two_dashes =
1435                     (ld_options[j].control == TWO_DASHES
1436                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1437
1438                   printf ("%s-%s%s",
1439                           comma ? ", " : "",
1440                           two_dashes ? "-" : "",
1441                           ld_options[j].opt.name);
1442                   len += ((comma ? 2 : 0)
1443                           + 1
1444                           + (two_dashes ? 1 : 0)
1445                           + strlen (ld_options[j].opt.name));
1446                   if (ld_options[j].arg != NULL)
1447                     {
1448                       printf (" %s", _(ld_options[j].arg));
1449                       len += 1 + strlen (_(ld_options[j].arg));
1450                     }
1451                   comma = TRUE;
1452                 }
1453               ++j;
1454             }
1455           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1456
1457           if (len >= 30)
1458             {
1459               printf ("\n");
1460               len = 0;
1461             }
1462
1463           for (; len < 30; len++)
1464             putchar (' ');
1465
1466           printf ("%s\n", _(ld_options[i].doc));
1467         }
1468     }
1469
1470   /* Note: Various tools (such as libtool) depend upon the
1471      format of the listings below - do not change them.  */
1472   /* xgettext:c-format */
1473   printf (_("%s: supported targets:"), program_name);
1474   targets = bfd_target_list ();
1475   for (pp = targets; *pp != NULL; pp++)
1476     printf (" %s", *pp);
1477   free (targets);
1478   printf ("\n");
1479
1480   /* xgettext:c-format */
1481   printf (_("%s: supported emulations: "), program_name);
1482   ldemul_list_emulations (stdout);
1483   printf ("\n");
1484
1485   /* xgettext:c-format */
1486   printf (_("%s: emulation specific options:\n"), program_name);
1487   ldemul_list_emulation_options (stdout);
1488   printf ("\n");
1489
1490   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1491 }