ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libiberty.h"
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "safe-ctype.h"
  29 #include "getopt.h"
  30 #include "bfdlink.h"
  31 #include "ld.h"
  32 #include "ldmain.h"
  33 #include "ldmisc.h"
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include <ldgram.h>
  37 #include "ldlex.h"
  38 #include "ldfile.h"
  39 #include "ldver.h"
  40 #include "ldemul.h"
  41 #include "demangle.h"
  42
  43 #ifndef PATH_SEPARATOR
  44 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  45 #define PATH_SEPARATOR ';'
  46 #else
  47 #define PATH_SEPARATOR ':'
  48 #endif
  49 #endif
  50
  51 /* Somewhere above, sys/stat.h got included . . . .  */
  52 #if !defined(S_ISDIR) && defined(S_IFDIR)
  53 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  54 #endif
  55
  56 static void set_default_dirlist (char *);
  57 static void set_section_start (char *, char *);
  58 static void set_segment_start (const char *, char *);
  59 static void help (void);
  60
  61 /* Non-zero if we are processing a --defsym from the command line.  */
  62 int parsing_defsym = 0;
  63
  64 /* Codes used for the long options with no short synonyms.  150 isn't
  65    special; it's just an arbitrary non-ASCII char value.  */
  66 enum option_values
  67 {
  68   OPTION_ASSERT = 150,
  69   OPTION_CALL_SHARED,
  70   OPTION_CREF,
  71   OPTION_DEFSYM,
  72   OPTION_DEMANGLE,
  73   OPTION_DYNAMIC_LINKER,
  74   OPTION_EB,
  75   OPTION_EL,
  76   OPTION_EMBEDDED_RELOCS,
  77   OPTION_EXPORT_DYNAMIC,
  78   OPTION_HELP,
  79   OPTION_IGNORE,
  80   OPTION_MAP,
  81   OPTION_NO_DEMANGLE,
  82   OPTION_NO_KEEP_MEMORY,
  83   OPTION_NO_WARN_MISMATCH,
  84   OPTION_NOINHIBIT_EXEC,
  85   OPTION_NON_SHARED,
  86   OPTION_NO_WHOLE_ARCHIVE,
  87   OPTION_OFORMAT,
  88   OPTION_RELAX,
  89   OPTION_RETAIN_SYMBOLS_FILE,
  90   OPTION_RPATH,
  91   OPTION_RPATH_LINK,
  92   OPTION_SHARED,
  93   OPTION_SONAME,
  94   OPTION_SORT_COMMON,
  95   OPTION_SORT_SECTION,
  96   OPTION_STATS,
  97   OPTION_SYMBOLIC,
  98   OPTION_TASK_LINK,
  99   OPTION_TBSS,
 100   OPTION_TDATA,
 101   OPTION_TTEXT,
 102   OPTION_TRADITIONAL_FORMAT,
 103   OPTION_UR,
 104   OPTION_VERBOSE,
 105   OPTION_VERSION,
 106   OPTION_VERSION_SCRIPT,
 107   OPTION_VERSION_EXPORTS_SECTION,
 108   OPTION_WARN_COMMON,
 109   OPTION_WARN_CONSTRUCTORS,
 110   OPTION_WARN_FATAL,
 111   OPTION_WARN_MULTIPLE_GP,
 112   OPTION_WARN_ONCE,
 113   OPTION_WARN_SECTION_ALIGN,
 114   OPTION_SPLIT_BY_RELOC,
 115   OPTION_SPLIT_BY_FILE ,
 116   OPTION_WHOLE_ARCHIVE,
 117   OPTION_ADD_NEEDED,
 118   OPTION_NO_ADD_NEEDED,
 119   OPTION_AS_NEEDED,
 120   OPTION_NO_AS_NEEDED,
 121   OPTION_WRAP,
 122   OPTION_FORCE_EXE_SUFFIX,
 123   OPTION_GC_SECTIONS,
 124   OPTION_NO_GC_SECTIONS,
 125   OPTION_HASH_SIZE,
 126   OPTION_CHECK_SECTIONS,
 127   OPTION_NO_CHECK_SECTIONS,
 128   OPTION_NO_UNDEFINED,
 129   OPTION_INIT,
 130   OPTION_FINI,
 131   OPTION_SECTION_START,
 132   OPTION_UNIQUE,
 133   OPTION_TARGET_HELP,
 134   OPTION_ALLOW_SHLIB_UNDEFINED,
 135   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 136   OPTION_ALLOW_MULTIPLE_DEFINITION,
 137   OPTION_NO_UNDEFINED_VERSION,
 138   OPTION_DEFAULT_SYMVER,
 139   OPTION_DISCARD_NONE,
 140   OPTION_SPARE_DYNAMIC_TAGS,
 141   OPTION_NO_DEFINE_COMMON,
 142   OPTION_NOSTDLIB,
 143   OPTION_NO_OMAGIC,
 144   OPTION_STRIP_DISCARDED,
 145   OPTION_NO_STRIP_DISCARDED,
 146   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 147   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 148   OPTION_PIE,
 149   OPTION_UNRESOLVED_SYMBOLS,
 150   OPTION_WARN_UNRESOLVED_SYMBOLS,
 151   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 152   OPTION_WARN_SHARED_TEXTREL,
 153   OPTION_REDUCE_MEMORY_OVERHEADS
 154 };
 155
 156 /* The long options.  This structure is used for both the option
 157    parsing and the help text.  */
 158
 159 struct ld_option
 160 {
 161   /* The long option information.  */
 162   struct option opt;
 163   /* The short option with the same meaning ('\0' if none).  */
 164   char shortopt;
 165   /* The name of the argument (NULL if none).  */
 166   const char *arg;
 167   /* The documentation string.  If this is NULL, this is a synonym for
 168      the previous option.  */
 169   const char *doc;
 170   enum {
 171     /* Use one dash before long option name.  */
 172     ONE_DASH,
 173     /* Use two dashes before long option name.  */
 174     TWO_DASHES,
 175     /* Only accept two dashes before the long option name.
 176        This is an overloading of the use of this enum, since originally it
 177        was only intended to tell the --help display function how to display
 178        the long option name.  This feature was added in order to resolve
 179        the confusion about the -omagic command line switch.  Is it setting
 180        the output file name to "magic" or is it setting the NMAGIC flag on
 181        the output ?  It has been decided that it is setting the output file
 182        name, and that if you want to set the NMAGIC flag you should use -N
 183        or --omagic.  */
 184     EXACTLY_TWO_DASHES,
 185     /* Don't mention this option in --help output.  */
 186     NO_HELP
 187   } control;
 188 };
 189
 190 static const struct ld_option ld_options[] =
 191 {
 192   { {NULL, required_argument, NULL, '\0'},
 193     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 194     ONE_DASH },
 195   { {"architecture", required_argument, NULL, 'A'},
 196     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 197   { {"format", required_argument, NULL, 'b'},
 198     'b', N_("TARGET"), N_("Specify target for following input files"),
 199     TWO_DASHES },
 200   { {"mri-script", required_argument, NULL, 'c'},
 201     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 202   { {"dc", no_argument, NULL, 'd'},
 203     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 204   { {"dp", no_argument, NULL, 'd'},
 205     '\0', NULL, NULL, ONE_DASH },
 206   { {"entry", required_argument, NULL, 'e'},
 207     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 208   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 209     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 210   { {"EB", no_argument, NULL, OPTION_EB},
 211     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 212   { {"EL", no_argument, NULL, OPTION_EL},
 213     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 214   { {"auxiliary", required_argument, NULL, 'f'},
 215     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 216     TWO_DASHES },
 217   { {"filter", required_argument, NULL, 'F'},
 218     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 219     TWO_DASHES },
 220   { {NULL, no_argument, NULL, '\0'},
 221     'g', NULL, N_("Ignored"), ONE_DASH },
 222   { {"gpsize", required_argument, NULL, 'G'},
 223     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 224     TWO_DASHES },
 225   { {"soname", required_argument, NULL, OPTION_SONAME},
 226     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 227   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 228     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 229     TWO_DASHES },
 230   { {"library", required_argument, NULL, 'l'},
 231     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 232   { {"library-path", required_argument, NULL, 'L'},
 233     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 234     TWO_DASHES },
 235   { {NULL, required_argument, NULL, '\0'},
 236     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 237   { {"print-map", no_argument, NULL, 'M'},
 238     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 239   { {"nmagic", no_argument, NULL, 'n'},
 240     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 241   { {"omagic", no_argument, NULL, 'N'},
 242     'N', NULL, N_("Do not page align data, do not make text readonly"),
 243     EXACTLY_TWO_DASHES },
 244   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 245     '\0', NULL, N_("Page align data, make text readonly"),
 246     EXACTLY_TWO_DASHES },
 247   { {"output", required_argument, NULL, 'o'},
 248     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 249   { {NULL, required_argument, NULL, '\0'},
 250     'O', NULL, N_("Optimize output file"), ONE_DASH },
 251   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 252     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 253   { {"emit-relocs", no_argument, NULL, 'q'},
 254     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 255   { {"relocatable", no_argument, NULL, 'r'},
 256     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 257   { {NULL, no_argument, NULL, '\0'},
 258     'i', NULL, NULL, ONE_DASH },
 259   { {"just-symbols", required_argument, NULL, 'R'},
 260     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 261     TWO_DASHES },
 262   { {"strip-all", no_argument, NULL, 's'},
 263     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 264   { {"strip-debug", no_argument, NULL, 'S'},
 265     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 266   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 267     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 268   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 269     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 270   { {"trace", no_argument, NULL, 't'},
 271     't', NULL, N_("Trace file opens"), TWO_DASHES },
 272   { {"script", required_argument, NULL, 'T'},
 273     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 274   { {"undefined", required_argument, NULL, 'u'},
 275     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 276     TWO_DASHES },
 277   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 278     '\0', N_("[=SECTION]"),
 279     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 280   { {"Ur", no_argument, NULL, OPTION_UR},
 281     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 282   { {"version", no_argument, NULL, OPTION_VERSION},
 283     'v', NULL, N_("Print version information"), TWO_DASHES },
 284   { {NULL, no_argument, NULL, '\0'},
 285     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 286   { {"discard-all", no_argument, NULL, 'x'},
 287     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 288   { {"discard-locals", no_argument, NULL, 'X'},
 289     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 290   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 291     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 292   { {"trace-symbol", required_argument, NULL, 'y'},
 293     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 294   { {NULL, required_argument, NULL, '\0'},
 295     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 296     ONE_DASH },
 297   { {"start-group", no_argument, NULL, '('},
 298     '(', NULL, N_("Start a group"), TWO_DASHES },
 299   { {"end-group", no_argument, NULL, ')'},
 300     ')', NULL, N_("End a group"), TWO_DASHES },
 301   { {"accept-unknown-input-arch", no_argument, NULL,
 302      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 303     '\0', NULL,
 304     N_("Accept input files whose architecture cannot be determined"),
 305     TWO_DASHES },
 306   { {"no-accept-unknown-input-arch", no_argument, NULL,
 307      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 308     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 309     TWO_DASHES },
 310   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 311     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 312                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 313   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 314     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 315                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 316   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 317     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 318     TWO_DASHES },
 319   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 320     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 321     TWO_DASHES },
 322   { {"assert", required_argument, NULL, OPTION_ASSERT},
 323     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 324   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 325     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 326   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 327     '\0', NULL, NULL, ONE_DASH },
 328   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 329     '\0', NULL, NULL, ONE_DASH },
 330   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 331     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 332   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 333     '\0', NULL, NULL, ONE_DASH },
 334   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 335     '\0', NULL, NULL, ONE_DASH },
 336   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 337     '\0', NULL, NULL, ONE_DASH },
 338   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 339     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 340   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 341     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 342     TWO_DASHES },
 343   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 344     '\0', NULL, N_("Do not check section addresses for overlaps"),
 345     TWO_DASHES },
 346   { {"cref", no_argument, NULL, OPTION_CREF},
 347     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 348   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 349     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 350   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 351     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 352     TWO_DASHES },
 353   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 354     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 355   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 356     '\0', NULL, N_("Treat warnings as errors"),
 357     TWO_DASHES },
 358   { {"fini", required_argument, NULL, OPTION_FINI},
 359     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 360   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 361     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 362   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 363     '\0', NULL, N_("Remove unused sections (on some targets)"),
 364     TWO_DASHES },
 365   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 366     '\0', NULL, N_("Don't remove unused sections (default)"),
 367     TWO_DASHES },
 368   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 369     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 370     TWO_DASHES },
 371   { {"help", no_argument, NULL, OPTION_HELP},
 372     '\0', NULL, N_("Print option help"), TWO_DASHES },
 373   { {"init", required_argument, NULL, OPTION_INIT},
 374     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 375   { {"Map", required_argument, NULL, OPTION_MAP},
 376     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 377   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 378     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 379   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 380     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 381   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 382     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 383   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 384     '\0', NULL, N_("Do not allow unresolved references in object files"),
 385     TWO_DASHES },
 386   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 387     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 388     TWO_DASHES },
 389   { {"no-allow-shlib-undefined", no_argument, NULL,
 390      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 391     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 392     TWO_DASHES },
 393   { {"allow-multiple-definition", no_argument, NULL,
 394      OPTION_ALLOW_MULTIPLE_DEFINITION},
 395     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 396   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 397     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 398   { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
 399     '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
 400   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 401     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 402   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 403     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 404   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 405     '\0', NULL, N_("Create an output file even if errors occur"),
 406     TWO_DASHES },
 407   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 408     '\0', NULL, NULL, NO_HELP },
 409   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 410     '\0', NULL, N_("Only use library directories specified on\n"
 411                    "\t\t\t\tthe command line"), ONE_DASH },
 412   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 413     '\0', N_("TARGET"), N_("Specify target of output file"),
 414     EXACTLY_TWO_DASHES },
 415   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 416     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 417   { {"reduce-memory-overheads", no_argument, NULL,
 418      OPTION_REDUCE_MEMORY_OVERHEADS},
 419     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 420     TWO_DASHES },
 421   { {"relax", no_argument, NULL, OPTION_RELAX},
 422     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 423   { {"retain-symbols-file", required_argument, NULL,
 424      OPTION_RETAIN_SYMBOLS_FILE},
 425     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 426   { {"rpath", required_argument, NULL, OPTION_RPATH},
 427     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 428   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 429     '\0', N_("PATH"), N_("Set link time shared library search path"),
 430     ONE_DASH },
 431   { {"shared", no_argument, NULL, OPTION_SHARED},
 432     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 433   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 434     '\0', NULL, NULL, ONE_DASH },
 435   { {"pie", no_argument, NULL, OPTION_PIE},
 436     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 437   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 438     '\0', NULL, NULL, TWO_DASHES },
 439   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 440     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 441   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 442     '\0', NULL, NULL, NO_HELP },
 443   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 444     '\0', N_("name|alignment"),
 445     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 446   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 447     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 448     TWO_DASHES },
 449   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 450     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 451     TWO_DASHES },
 452   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 453     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 454     TWO_DASHES },
 455   { {"stats", no_argument, NULL, OPTION_STATS},
 456     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 457   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 458     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 459   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 460     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 461   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 462     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 463   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 464     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 465     TWO_DASHES },
 466   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 467     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 468   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 469     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 470   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 471     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 472   { {"unresolved-symbols=<method>", required_argument, NULL,
 473      OPTION_UNRESOLVED_SYMBOLS},
 474     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 475                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 476                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 477   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 478     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 479   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 480     '\0', NULL, NULL, NO_HELP },
 481   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 482     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 483   { {"version-exports-section", required_argument, NULL,
 484      OPTION_VERSION_EXPORTS_SECTION },
 485     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 486                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 487   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 488     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 489   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 490     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 491     TWO_DASHES },
 492   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 493     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 494   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 495     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 496   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 497     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 498     TWO_DASHES },
 499   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 500     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 501     TWO_DASHES },
 502   { {"warn-unresolved-symbols", no_argument, NULL,
 503      OPTION_WARN_UNRESOLVED_SYMBOLS},
 504     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 505   { {"error-unresolved-symbols", no_argument, NULL,
 506      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 507     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 508   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 509     '\0', NULL, N_("Include all objects from following archives"),
 510     TWO_DASHES },
 511   { {"wrap", required_argument, NULL, OPTION_WRAP},
 512     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 513 };
 514
 515 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 516
 517 void
 518 parse_args (unsigned argc, char **argv)
 519 {
 520   unsigned i;
 521   int is, il, irl;
 522   int ingroup = 0;
 523   char *default_dirlist = NULL;
 524   char *shortopts;
 525   struct option *longopts;
 526   struct option *really_longopts;
 527   int last_optind;
 528   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 529
 530   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 531   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 532   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 533
 534   /* Starting the short option string with '-' is for programs that
 535      expect options and other ARGV-elements in any order and that care about
 536      the ordering of the two.  We describe each non-option ARGV-element
 537      as if it were the argument of an option with character code 1.  */
 538   shortopts[0] = '-';
 539   is = 1;
 540   il = 0;
 541   irl = 0;
 542   for (i = 0; i < OPTION_COUNT; i++)
 543     {
 544       if (ld_options[i].shortopt != '\0')
 545         {
 546           shortopts[is] = ld_options[i].shortopt;
 547           ++is;
 548           if (ld_options[i].opt.has_arg == required_argument
 549               || ld_options[i].opt.has_arg == optional_argument)
 550             {
 551               shortopts[is] = ':';
 552               ++is;
 553               if (ld_options[i].opt.has_arg == optional_argument)
 554                 {
 555                   shortopts[is] = ':';
 556                   ++is;
 557                 }
 558             }
 559         }
 560       if (ld_options[i].opt.name != NULL)
 561         {
 562           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 563             {
 564               really_longopts[irl] = ld_options[i].opt;
 565               ++irl;
 566             }
 567           else
 568             {
 569               longopts[il] = ld_options[i].opt;
 570               ++il;
 571             }
 572         }
 573     }
 574   shortopts[is] = '\0';
 575   longopts[il].name = NULL;
 576   really_longopts[irl].name = NULL;
 577
 578   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 579
 580   /* The -G option is ambiguous on different platforms.  Sometimes it
 581      specifies the largest data size to put into the small data
 582      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 583      the first form takes an argument, while the second does not.
 584
 585      We need to permit the --shared form because on some platforms,
 586      such as Solaris, gcc -shared will pass -G to the linker.
 587
 588      To permit either usage, we look through the argument list.  If we
 589      find -G not followed by a number, we change it into --shared.
 590      This will work for most normal cases.  */
 591   for (i = 1; i < argc; i++)
 592     if (strcmp (argv[i], "-G") == 0
 593         && (i + 1 >= argc
 594             || ! ISDIGIT (argv[i + 1][0])))
 595       argv[i] = (char *) "--shared";
 596
 597   /* Because we permit long options to start with a single dash, and
 598      we have a --library option, and the -l option is conventionally
 599      used with an immediately following argument, we can have bad
 600      results if somebody tries to use -l with a library whose name
 601      happens to start with "ibrary", as in -li.  We avoid problems by
 602      simply turning -l into --library.  This means that users will
 603      have to use two dashes in order to use --library, which is OK
 604      since that's how it is documented.
 605
 606      FIXME: It's possible that this problem can arise for other short
 607      options as well, although the user does always have the recourse
 608      of adding a space between the option and the argument.  */
 609   for (i = 1; i < argc; i++)
 610     {
 611       if (argv[i][0] == '-'
 612           && argv[i][1] == 'l'
 613           && argv[i][2] != '\0')
 614         {
 615           char *n;
 616
 617           n = xmalloc (strlen (argv[i]) + 20);
 618           sprintf (n, "--library=%s", argv[i] + 2);
 619           argv[i] = n;
 620         }
 621     }
 622
 623   last_optind = -1;
 624   while (1)
 625     {
 626       int longind;
 627       int optc;
 628
 629       /* Using last_optind lets us avoid calling ldemul_parse_args
 630          multiple times on a single option, which would lead to
 631          confusion in the internal static variables maintained by
 632          getopt.  This could otherwise happen for an argument like
 633          -nx, in which the -n is parsed as a single option, and we
 634          loop around to pick up the -x.  */
 635       if (optind != last_optind)
 636         if (ldemul_parse_args (argc, argv))
 637           continue;
 638
 639       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 640          can indicate a long option.  */
 641       opterr = 0;
 642       last_optind = optind;
 643       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 644       if (optc == '?')
 645         {
 646           optind = last_optind;
 647           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 648         }
 649
 650       if (ldemul_handle_option (optc))
 651         continue;
 652
 653       if (optc == -1)
 654         break;
 655
 656       switch (optc)
 657         {
 658         case '?':
 659           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 660         default:
 661           einfo (_("%P%F: use the --help option for usage information\n"));
 662
 663         case 1:                 /* File name.  */
 664           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 665           break;
 666
 667         case OPTION_IGNORE:
 668           break;
 669         case 'a':
 670           /* For HP/UX compatibility.  Actually -a shared should mean
 671              ``use only shared libraries'' but, then, we don't
 672              currently support shared libraries on HP/UX anyhow.  */
 673           if (strcmp (optarg, "archive") == 0)
 674             config.dynamic_link = FALSE;
 675           else if (strcmp (optarg, "shared") == 0
 676                    || strcmp (optarg, "default") == 0)
 677             config.dynamic_link = TRUE;
 678           else
 679             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 680           break;
 681         case OPTION_ASSERT:
 682           /* FIXME: We just ignore these, but we should handle them.  */
 683           if (strcmp (optarg, "definitions") == 0)
 684             ;
 685           else if (strcmp (optarg, "nodefinitions") == 0)
 686             ;
 687           else if (strcmp (optarg, "nosymbolic") == 0)
 688             ;
 689           else if (strcmp (optarg, "pure-text") == 0)
 690             ;
 691           else
 692             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 693           break;
 694         case 'A':
 695           ldfile_add_arch (optarg);
 696           break;
 697         case 'b':
 698           lang_add_target (optarg);
 699           break;
 700         case 'c':
 701           ldfile_open_command_file (optarg);
 702           parser_input = input_mri_script;
 703           yyparse ();
 704           break;
 705         case OPTION_CALL_SHARED:
 706           config.dynamic_link = TRUE;
 707           break;
 708         case OPTION_NON_SHARED:
 709           config.dynamic_link = FALSE;
 710           break;
 711         case OPTION_CREF:
 712           command_line.cref = TRUE;
 713           link_info.notice_all = TRUE;
 714           break;
 715         case 'd':
 716           command_line.force_common_definition = TRUE;
 717           break;
 718         case OPTION_DEFSYM:
 719           lex_string = optarg;
 720           lex_redirect (optarg);
 721           parser_input = input_defsym;
 722           parsing_defsym = 1;
 723           yyparse ();
 724           parsing_defsym = 0;
 725           lex_string = NULL;
 726           break;
 727         case OPTION_DEMANGLE:
 728           demangling = TRUE;
 729           if (optarg != NULL)
 730             {
 731               enum demangling_styles style;
 732
 733               style = cplus_demangle_name_to_style (optarg);
 734               if (style == unknown_demangling)
 735                 einfo (_("%F%P: unknown demangling style `%s'"),
 736                        optarg);
 737
 738               cplus_demangle_set_style (style);
 739             }
 740           break;
 741         case 'I':               /* Used on Solaris.  */
 742         case OPTION_DYNAMIC_LINKER:
 743           command_line.interpreter = optarg;
 744           break;
 745         case OPTION_EB:
 746           command_line.endian = ENDIAN_BIG;
 747           break;
 748         case OPTION_EL:
 749           command_line.endian = ENDIAN_LITTLE;
 750           break;
 751         case OPTION_EMBEDDED_RELOCS:
 752           command_line.embedded_relocs = TRUE;
 753           break;
 754         case OPTION_EXPORT_DYNAMIC:
 755         case 'E': /* HP/UX compatibility.  */
 756           link_info.export_dynamic = TRUE;
 757           break;
 758         case 'e':
 759           lang_add_entry (optarg, TRUE);
 760           break;
 761         case 'f':
 762           if (command_line.auxiliary_filters == NULL)
 763             {
 764               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 765               command_line.auxiliary_filters[0] = optarg;
 766               command_line.auxiliary_filters[1] = NULL;
 767             }
 768           else
 769             {
 770               int c;
 771               char **p;
 772
 773               c = 0;
 774               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 775                 ++c;
 776               command_line.auxiliary_filters
 777                 = xrealloc (command_line.auxiliary_filters,
 778                             (c + 2) * sizeof (char *));
 779               command_line.auxiliary_filters[c] = optarg;
 780               command_line.auxiliary_filters[c + 1] = NULL;
 781             }
 782           break;
 783         case 'F':
 784           command_line.filter_shlib = optarg;
 785           break;
 786         case OPTION_FORCE_EXE_SUFFIX:
 787           command_line.force_exe_suffix = TRUE;
 788           break;
 789         case 'G':
 790           {
 791             char *end;
 792             g_switch_value = strtoul (optarg, &end, 0);
 793             if (*end)
 794               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 795           }
 796           break;
 797         case 'g':
 798           /* Ignore.  */
 799           break;
 800         case OPTION_GC_SECTIONS:
 801           command_line.gc_sections = TRUE;
 802           break;
 803         case OPTION_HELP:
 804           help ();
 805           xexit (0);
 806           break;
 807         case 'L':
 808           ldfile_add_library_path (optarg, TRUE);
 809           break;
 810         case 'l':
 811           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 812           break;
 813         case 'M':
 814           config.map_filename = "-";
 815           break;
 816         case 'm':
 817           /* Ignore.  Was handled in a pre-parse.   */
 818           break;
 819         case OPTION_MAP:
 820           config.map_filename = optarg;
 821           break;
 822         case 'N':
 823           config.text_read_only = FALSE;
 824           config.magic_demand_paged = FALSE;
 825           config.dynamic_link = FALSE;
 826           break;
 827         case OPTION_NO_OMAGIC:
 828           config.text_read_only = TRUE;
 829           config.magic_demand_paged = TRUE;
 830           /* NB/ Does not set dynamic_link to TRUE.
 831              Use --call-shared or -Bdynamic for this.  */
 832           break;
 833         case 'n':
 834           config.magic_demand_paged = FALSE;
 835           config.dynamic_link = FALSE;
 836           break;
 837         case OPTION_NO_DEFINE_COMMON:
 838           command_line.inhibit_common_definition = TRUE;
 839           break;
 840         case OPTION_NO_DEMANGLE:
 841           demangling = FALSE;
 842           break;
 843         case OPTION_NO_GC_SECTIONS:
 844           command_line.gc_sections = FALSE;
 845           break;
 846         case OPTION_NO_KEEP_MEMORY:
 847           link_info.keep_memory = FALSE;
 848           break;
 849         case OPTION_NO_UNDEFINED:
 850           link_info.unresolved_syms_in_objects
 851             = how_to_report_unresolved_symbols;
 852           break;
 853         case OPTION_ALLOW_SHLIB_UNDEFINED:
 854           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 855           break;
 856         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 857           link_info.unresolved_syms_in_shared_libs
 858             = how_to_report_unresolved_symbols;
 859           break;
 860         case OPTION_UNRESOLVED_SYMBOLS:
 861           if (strcmp (optarg, "ignore-all") == 0)
 862             {
 863               link_info.unresolved_syms_in_objects = RM_IGNORE;
 864               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 865             }
 866           else if (strcmp (optarg, "report-all") == 0)
 867             {
 868               link_info.unresolved_syms_in_objects
 869                 = how_to_report_unresolved_symbols;
 870               link_info.unresolved_syms_in_shared_libs
 871                 = how_to_report_unresolved_symbols;
 872             }
 873           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 874             {
 875               link_info.unresolved_syms_in_objects = RM_IGNORE;
 876               link_info.unresolved_syms_in_shared_libs
 877                 = how_to_report_unresolved_symbols;
 878             }
 879           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 880             {
 881               link_info.unresolved_syms_in_objects
 882                 = how_to_report_unresolved_symbols;
 883               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 884             }
 885           else
 886             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 887           break;
 888         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 889           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 890           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 891             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 892           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 893             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 894           break;
 895
 896         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 897           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 898           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 899             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 900           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 901             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 902           break;
 903         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 904           link_info.allow_multiple_definition = TRUE;
 905           break;
 906         case OPTION_NO_UNDEFINED_VERSION:
 907           link_info.allow_undefined_version = FALSE;
 908           break;
 909         case OPTION_DEFAULT_SYMVER:
 910           link_info.create_default_symver = TRUE;
 911           break;
 912         case OPTION_NO_WARN_MISMATCH:
 913           command_line.warn_mismatch = FALSE;
 914           break;
 915         case OPTION_NOINHIBIT_EXEC:
 916           force_make_executable = TRUE;
 917           break;
 918         case OPTION_NOSTDLIB:
 919           config.only_cmd_line_lib_dirs = TRUE;
 920           break;
 921         case OPTION_NO_WHOLE_ARCHIVE:
 922           whole_archive = FALSE;
 923           break;
 924         case 'O':
 925           /* FIXME "-O<non-digits> <value>" used to set the address of
 926              section <non-digits>.  Was this for compatibility with
 927              something, or can we create a new option to do that
 928              (with a syntax similar to -defsym)?
 929              getopt can't handle two args to an option without kludges.  */
 930
 931           /* Enable optimizations of output files.  */
 932           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 933           break;
 934         case 'o':
 935           lang_add_output (optarg, 0);
 936           break;
 937         case OPTION_OFORMAT:
 938           lang_add_output_format (optarg, NULL, NULL, 0);
 939           break;
 940         case 'q':
 941           link_info.emitrelocations = TRUE;
 942           break;
 943         case 'i':
 944         case 'r':
 945           if (optind == last_optind)
 946             /* This can happen if the user put "-rpath,a" on the command
 947                line.  (Or something similar.  The comma is important).
 948                Getopt becomes confused and thinks that this is a -r option
 949                but it cannot parse the text after the -r so it refuses to
 950                increment the optind counter.  Detect this case and issue
 951                an error message here.  We cannot just make this a warning,
 952                increment optind, and continue because getopt is too confused
 953                and will seg-fault the next time around.  */
 954             einfo(_("%P%F: bad -rpath option\n"));
 955
 956           link_info.relocatable = TRUE;
 957           config.build_constructors = FALSE;
 958           config.magic_demand_paged = FALSE;
 959           config.text_read_only = FALSE;
 960           config.dynamic_link = FALSE;
 961           break;
 962         case 'R':
 963           /* The GNU linker traditionally uses -R to mean to include
 964              only the symbols from a file.  The Solaris linker uses -R
 965              to set the path used by the runtime linker to find
 966              libraries.  This is the GNU linker -rpath argument.  We
 967              try to support both simultaneously by checking the file
 968              named.  If it is a directory, rather than a regular file,
 969              we assume -rpath was meant.  */
 970           {
 971             struct stat s;
 972
 973             if (stat (optarg, &s) >= 0
 974                 && ! S_ISDIR (s.st_mode))
 975               {
 976                 lang_add_input_file (optarg,
 977                                      lang_input_file_is_symbols_only_enum,
 978                                      NULL);
 979                 break;
 980               }
 981           }
 982           /* Fall through.  */
 983         case OPTION_RPATH:
 984           if (command_line.rpath == NULL)
 985             command_line.rpath = xstrdup (optarg);
 986           else
 987             {
 988               size_t rpath_len = strlen (command_line.rpath);
 989               size_t optarg_len = strlen (optarg);
 990               char *buf;
 991               char *cp = command_line.rpath;
 992
 993               /* First see whether OPTARG is already in the path.  */
 994               do
 995                 {
 996                   size_t idx = 0;
 997
 998                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 999                     ++idx;
1000                   if (optarg[idx] == '\0'
1001                       && (cp[idx] == '\0' || cp[idx] == ':'))
1002                     /* We found it.  */
1003                     break;
1004
1005                   /* Not yet found.  */
1006                   cp = strchr (cp, ':');
1007                   if (cp != NULL)
1008                     ++cp;
1009                 }
1010               while (cp != NULL);
1011
1012               if (cp == NULL)
1013                 {
1014                   buf = xmalloc (rpath_len + optarg_len + 2);
1015                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1016                   free (command_line.rpath);
1017                   command_line.rpath = buf;
1018                 }
1019             }
1020           break;
1021         case OPTION_RPATH_LINK:
1022           if (command_line.rpath_link == NULL)
1023             command_line.rpath_link = xstrdup (optarg);
1024           else
1025             {
1026               char *buf;
1027
1028               buf = xmalloc (strlen (command_line.rpath_link)
1029                              + strlen (optarg)
1030                              + 2);
1031               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1032               free (command_line.rpath_link);
1033               command_line.rpath_link = buf;
1034             }
1035           break;
1036         case OPTION_RELAX:
1037           command_line.relax = TRUE;
1038           break;
1039         case OPTION_RETAIN_SYMBOLS_FILE:
1040           add_keepsyms_file (optarg);
1041           break;
1042         case 'S':
1043           link_info.strip = strip_debugger;
1044           break;
1045         case 's':
1046           link_info.strip = strip_all;
1047           break;
1048         case OPTION_STRIP_DISCARDED:
1049           link_info.strip_discarded = TRUE;
1050           break;
1051         case OPTION_NO_STRIP_DISCARDED:
1052           link_info.strip_discarded = FALSE;
1053           break;
1054         case OPTION_SHARED:
1055           if (config.has_shared)
1056             {
1057               link_info.shared = TRUE;
1058               /* When creating a shared library, the default
1059                  behaviour is to ignore any unresolved references.  */
1060               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1061                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1062               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1063                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1064             }
1065           else
1066             einfo (_("%P%F: -shared not supported\n"));
1067           break;
1068         case OPTION_PIE:
1069           if (config.has_shared)
1070             {
1071               link_info.shared = TRUE;
1072               link_info.pie = TRUE;
1073             }
1074           else
1075             einfo (_("%P%F: -pie not supported\n"));
1076           break;
1077         case 'h':               /* Used on Solaris.  */
1078         case OPTION_SONAME:
1079           command_line.soname = optarg;
1080           break;
1081         case OPTION_SORT_COMMON:
1082           config.sort_common = TRUE;
1083           break;
1084         case OPTION_SORT_SECTION:
1085           if (strcmp (optarg, N_("name")) == 0)
1086             sort_section = by_name;
1087           else if (strcmp (optarg, N_("alignment")) == 0)
1088             sort_section = by_alignment;
1089           else
1090             einfo (_("%P%F: invalid section sorting option: %s\n"),
1091                    optarg);
1092           break;
1093         case OPTION_STATS:
1094           config.stats = TRUE;
1095           break;
1096         case OPTION_SYMBOLIC:
1097           link_info.symbolic = TRUE;
1098           break;
1099         case 't':
1100           trace_files = TRUE;
1101           break;
1102         case 'T':
1103           ldfile_open_command_file (optarg);
1104           parser_input = input_script;
1105           yyparse ();
1106           break;
1107         case OPTION_SECTION_START:
1108           {
1109             char *optarg2;
1110             char *sec_name;
1111             int len;
1112
1113             /* Check for <something>=<somthing>...  */
1114             optarg2 = strchr (optarg, '=');
1115             if (optarg2 == NULL)
1116               einfo (_("%P%F: invalid argument to option"
1117                        " \"--section-start\"\n"));
1118
1119             optarg2++;
1120
1121             /* So far so good.  Are all the args present?  */
1122             if ((*optarg == '\0') || (*optarg2 == '\0'))
1123               einfo (_("%P%F: missing argument(s) to option"
1124                        " \"--section-start\"\n"));
1125
1126             /* We must copy the section name as set_section_start
1127                doesn't do it for us.  */
1128             len = optarg2 - optarg;
1129             sec_name = xmalloc (len);
1130             memcpy (sec_name, optarg, len - 1);
1131             sec_name[len - 1] = 0;
1132
1133             /* Then set it...  */
1134             set_section_start (sec_name, optarg2);
1135           }
1136           break;
1137         case OPTION_TARGET_HELP:
1138           /* Mention any target specific options.  */
1139           ldemul_list_emulation_options (stdout);
1140           exit (0);
1141         case OPTION_TBSS:
1142           set_segment_start (".bss", optarg);
1143           break;
1144         case OPTION_TDATA:
1145           set_segment_start (".data", optarg);
1146           break;
1147         case OPTION_TTEXT:
1148           set_segment_start (".text", optarg);
1149           break;
1150         case OPTION_TRADITIONAL_FORMAT:
1151           link_info.traditional_format = TRUE;
1152           break;
1153         case OPTION_TASK_LINK:
1154           link_info.task_link = TRUE;
1155           /* Fall through - do an implied -r option.  */
1156         case OPTION_UR:
1157           link_info.relocatable = TRUE;
1158           config.build_constructors = TRUE;
1159           config.magic_demand_paged = FALSE;
1160           config.text_read_only = FALSE;
1161           config.dynamic_link = FALSE;
1162           break;
1163         case 'u':
1164           ldlang_add_undef (optarg);
1165           break;
1166         case OPTION_UNIQUE:
1167           if (optarg != NULL)
1168             lang_add_unique (optarg);
1169           else
1170             config.unique_orphan_sections = TRUE;
1171           break;
1172         case OPTION_VERBOSE:
1173           ldversion (1);
1174           version_printed = TRUE;
1175           trace_file_tries = TRUE;
1176           overflow_cutoff_limit = -2;
1177           break;
1178         case 'v':
1179           ldversion (0);
1180           version_printed = TRUE;
1181           break;
1182         case 'V':
1183           ldversion (1);
1184           version_printed = TRUE;
1185           break;
1186         case OPTION_VERSION:
1187           ldversion (2);
1188           xexit (0);
1189           break;
1190         case OPTION_VERSION_SCRIPT:
1191           /* This option indicates a small script that only specifies
1192              version information.  Read it, but don't assume that
1193              we've seen a linker script.  */
1194           {
1195             FILE *hold_script_handle;
1196
1197             hold_script_handle = saved_script_handle;
1198             ldfile_open_command_file (optarg);
1199             saved_script_handle = hold_script_handle;
1200             parser_input = input_version_script;
1201             yyparse ();
1202           }
1203           break;
1204         case OPTION_VERSION_EXPORTS_SECTION:
1205           /* This option records a version symbol to be applied to the
1206              symbols listed for export to be found in the object files
1207              .exports sections.  */
1208           command_line.version_exports_section = optarg;
1209           break;
1210         case OPTION_WARN_COMMON:
1211           config.warn_common = TRUE;
1212           break;
1213         case OPTION_WARN_CONSTRUCTORS:
1214           config.warn_constructors = TRUE;
1215           break;
1216         case OPTION_WARN_FATAL:
1217           config.fatal_warnings = TRUE;
1218           break;
1219         case OPTION_WARN_MULTIPLE_GP:
1220           config.warn_multiple_gp = TRUE;
1221           break;
1222         case OPTION_WARN_ONCE:
1223           config.warn_once = TRUE;
1224           break;
1225         case OPTION_WARN_SECTION_ALIGN:
1226           config.warn_section_align = TRUE;
1227           break;
1228         case OPTION_WARN_SHARED_TEXTREL:
1229           link_info.warn_shared_textrel = TRUE;
1230           break;
1231         case OPTION_WHOLE_ARCHIVE:
1232           whole_archive = TRUE;
1233           break;
1234         case OPTION_ADD_NEEDED:
1235           add_needed = TRUE;
1236           break;
1237         case OPTION_NO_ADD_NEEDED:
1238           add_needed = FALSE;
1239           break;
1240         case OPTION_AS_NEEDED:
1241           as_needed = TRUE;
1242           break;
1243         case OPTION_NO_AS_NEEDED:
1244           as_needed = FALSE;
1245           break;
1246         case OPTION_WRAP:
1247           add_wrap (optarg);
1248           break;
1249         case OPTION_DISCARD_NONE:
1250           link_info.discard = discard_none;
1251           break;
1252         case 'X':
1253           link_info.discard = discard_l;
1254           break;
1255         case 'x':
1256           link_info.discard = discard_all;
1257           break;
1258         case 'Y':
1259           if (strncmp (optarg, "P,", 2) == 0)
1260             optarg += 2;
1261           if (default_dirlist != NULL)
1262             free (default_dirlist);
1263           default_dirlist = xstrdup (optarg);
1264           break;
1265         case 'y':
1266           add_ysym (optarg);
1267           break;
1268         case OPTION_SPARE_DYNAMIC_TAGS:
1269           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1270           break;
1271         case OPTION_SPLIT_BY_RELOC:
1272           if (optarg != NULL)
1273             config.split_by_reloc = strtoul (optarg, NULL, 0);
1274           else
1275             config.split_by_reloc = 32768;
1276           break;
1277         case OPTION_SPLIT_BY_FILE:
1278           if (optarg != NULL)
1279             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1280           else
1281             config.split_by_file = 1;
1282           break;
1283         case OPTION_CHECK_SECTIONS:
1284           command_line.check_section_addresses = TRUE;
1285           break;
1286         case OPTION_NO_CHECK_SECTIONS:
1287           command_line.check_section_addresses = FALSE;
1288           break;
1289         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1290           command_line.accept_unknown_input_arch = TRUE;
1291           break;
1292         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1293           command_line.accept_unknown_input_arch = FALSE;
1294           break;
1295         case '(':
1296           if (ingroup)
1297             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1298
1299           lang_enter_group ();
1300           ingroup = 1;
1301           break;
1302         case ')':
1303           if (! ingroup)
1304             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1305
1306           lang_leave_group ();
1307           ingroup = 0;
1308           break;
1309
1310         case OPTION_INIT:
1311           link_info.init_function = optarg;
1312           break;
1313
1314         case OPTION_FINI:
1315           link_info.fini_function = optarg;
1316           break;
1317
1318         case OPTION_REDUCE_MEMORY_OVERHEADS:
1319           command_line.reduce_memory_overheads = TRUE;
1320           if (config.hash_table_size == 0)
1321             config.hash_table_size = 1021;
1322           break;
1323
1324         case OPTION_HASH_SIZE:
1325           {
1326             bfd_size_type new_size;
1327
1328             new_size = strtoul (optarg, NULL, 0);
1329             if (new_size)
1330               config.hash_table_size = new_size;
1331             else
1332               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1333           }
1334           break;
1335         }
1336     }
1337
1338   if (ingroup)
1339     lang_leave_group ();
1340
1341   if (default_dirlist != NULL)
1342     {
1343       set_default_dirlist (default_dirlist);
1344       free (default_dirlist);
1345     }
1346
1347   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1348     /* FIXME: Should we allow emulations a chance to set this ?  */
1349     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1350
1351   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1352     /* FIXME: Should we allow emulations a chance to set this ?  */
1353     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1354 }
1355
1356 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1357    library search path.  */
1358
1359 static void
1360 set_default_dirlist (char *dirlist_ptr)
1361 {
1362   char *p;
1363
1364   while (1)
1365     {
1366       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1367       if (p != NULL)
1368         *p = '\0';
1369       if (*dirlist_ptr != '\0')
1370         ldfile_add_library_path (dirlist_ptr, TRUE);
1371       if (p == NULL)
1372         break;
1373       dirlist_ptr = p + 1;
1374     }
1375 }
1376
1377 static void
1378 set_section_start (char *sect, char *valstr)
1379 {
1380   const char *end;
1381   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1382   if (*end)
1383     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1384   lang_section_start (sect, exp_intop (val), NULL);
1385 }
1386
1387 static void
1388 set_segment_start (const char *section, char *valstr)
1389 {
1390   const char *name;
1391   const char *end;
1392   segment_type *seg;
1393
1394   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1395   if (*end)
1396     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1397   /* If we already have an entry for this segment, update the existing
1398      value.  */
1399   name = section + 1;
1400   for (seg = segments; seg; seg = seg->next)
1401     if (strcmp (seg->name, name) == 0)
1402       {
1403         seg->value = val;
1404         return;
1405       }
1406   /* There was no existing value so we must create a new segment
1407      entry.  */
1408   seg = stat_alloc (sizeof (*seg));
1409   seg->name = name;
1410   seg->value = val;
1411   seg->used = FALSE;
1412   /* Add it to the linked list of segments.  */
1413   seg->next = segments;
1414   segments = seg;
1415   /* Historically, -Ttext and friends set the base address of a
1416      particular section.  For backwards compatibility, we still do
1417      that.  If a SEGMENT_START directive is seen, the section address
1418      assignment will be disabled.  */
1419   lang_section_start (section, exp_intop (val), seg);
1420 }
1421
1422 \f
1423 /* Print help messages for the options.  */
1424
1425 static void
1426 help (void)
1427 {
1428   unsigned i;
1429   const char **targets, **pp;
1430
1431   printf (_("Usage: %s [options] file...\n"), program_name);
1432
1433   printf (_("Options:\n"));
1434   for (i = 0; i < OPTION_COUNT; i++)
1435     {
1436       if (ld_options[i].doc != NULL)
1437         {
1438           bfd_boolean comma;
1439           int len;
1440           unsigned j;
1441
1442           printf ("  ");
1443
1444           comma = FALSE;
1445           len = 2;
1446
1447           j = i;
1448           do
1449             {
1450               if (ld_options[j].shortopt != '\0'
1451                   && ld_options[j].control != NO_HELP)
1452                 {
1453                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1454                   len += (comma ? 2 : 0) + 2;
1455                   if (ld_options[j].arg != NULL)
1456                     {
1457                       if (ld_options[j].opt.has_arg != optional_argument)
1458                         {
1459                           printf (" ");
1460                           ++len;
1461                         }
1462                       printf ("%s", _(ld_options[j].arg));
1463                       len += strlen (_(ld_options[j].arg));
1464                     }
1465                   comma = TRUE;
1466                 }
1467               ++j;
1468             }
1469           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1470
1471           j = i;
1472           do
1473             {
1474               if (ld_options[j].opt.name != NULL
1475                   && ld_options[j].control != NO_HELP)
1476                 {
1477                   int two_dashes =
1478                     (ld_options[j].control == TWO_DASHES
1479                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1480
1481                   printf ("%s-%s%s",
1482                           comma ? ", " : "",
1483                           two_dashes ? "-" : "",
1484                           ld_options[j].opt.name);
1485                   len += ((comma ? 2 : 0)
1486                           + 1
1487                           + (two_dashes ? 1 : 0)
1488                           + strlen (ld_options[j].opt.name));
1489                   if (ld_options[j].arg != NULL)
1490                     {
1491                       printf (" %s", _(ld_options[j].arg));
1492                       len += 1 + strlen (_(ld_options[j].arg));
1493                     }
1494                   comma = TRUE;
1495                 }
1496               ++j;
1497             }
1498           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1499
1500           if (len >= 30)
1501             {
1502               printf ("\n");
1503               len = 0;
1504             }
1505
1506           for (; len < 30; len++)
1507             putchar (' ');
1508
1509           printf ("%s\n", _(ld_options[i].doc));
1510         }
1511     }
1512
1513   /* Note: Various tools (such as libtool) depend upon the
1514      format of the listings below - do not change them.  */
1515   /* xgettext:c-format */
1516   printf (_("%s: supported targets:"), program_name);
1517   targets = bfd_target_list ();
1518   for (pp = targets; *pp != NULL; pp++)
1519     printf (" %s", *pp);
1520   free (targets);
1521   printf ("\n");
1522
1523   /* xgettext:c-format */
1524   printf (_("%s: supported emulations: "), program_name);
1525   ldemul_list_emulations (stdout);
1526   printf ("\n");
1527
1528   /* xgettext:c-format */
1529   printf (_("%s: emulation specific options:\n"), program_name);
1530   ldemul_list_emulation_options (stdout);
1531   printf ("\n");
1532
1533   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1534 }