ld/lexsup.c

   1 /* Parse options for the GNU linker.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004, 2005
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GLD is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include "config.h"
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libiberty.h"
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include "safe-ctype.h"
  30 #include "getopt.h"
  31 #include "bfdlink.h"
  32 #include "ld.h"
  33 #include "ldmain.h"
  34 #include "ldmisc.h"
  35 #include "ldexp.h"
  36 #include "ldlang.h"
  37 #include <ldgram.h>
  38 #include "ldlex.h"
  39 #include "ldfile.h"
  40 #include "ldver.h"
  41 #include "ldemul.h"
  42 #include "demangle.h"
  43
  44 #ifndef PATH_SEPARATOR
  45 #if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
  46 #define PATH_SEPARATOR ';'
  47 #else
  48 #define PATH_SEPARATOR ':'
  49 #endif
  50 #endif
  51
  52 /* Somewhere above, sys/stat.h got included . . . .  */
  53 #if !defined(S_ISDIR) && defined(S_IFDIR)
  54 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  55 #endif
  56
  57 static void set_default_dirlist (char *);
  58 static void set_section_start (char *, char *);
  59 static void set_segment_start (const char *, char *);
  60 static void help (void);
  61
  62 /* Non-zero if we are processing a --defsym from the command line.  */
  63 int parsing_defsym = 0;
  64
  65 /* Codes used for the long options with no short synonyms.  150 isn't
  66    special; it's just an arbitrary non-ASCII char value.  */
  67 enum option_values
  68 {
  69   OPTION_ASSERT = 150,
  70   OPTION_CALL_SHARED,
  71   OPTION_CREF,
  72   OPTION_DEFSYM,
  73   OPTION_DEMANGLE,
  74   OPTION_DYNAMIC_LINKER,
  75   OPTION_SYSROOT,
  76   OPTION_EB,
  77   OPTION_EL,
  78   OPTION_EMBEDDED_RELOCS,
  79   OPTION_EXPORT_DYNAMIC,
  80   OPTION_HELP,
  81   OPTION_IGNORE,
  82   OPTION_MAP,
  83   OPTION_NO_DEMANGLE,
  84   OPTION_NO_KEEP_MEMORY,
  85   OPTION_NO_WARN_MISMATCH,
  86   OPTION_NOINHIBIT_EXEC,
  87   OPTION_NON_SHARED,
  88   OPTION_NO_WHOLE_ARCHIVE,
  89   OPTION_OFORMAT,
  90   OPTION_RELAX,
  91   OPTION_RETAIN_SYMBOLS_FILE,
  92   OPTION_RPATH,
  93   OPTION_RPATH_LINK,
  94   OPTION_SHARED,
  95   OPTION_SONAME,
  96   OPTION_SORT_COMMON,
  97   OPTION_SORT_SECTION,
  98   OPTION_STATS,
  99   OPTION_SYMBOLIC,
 100   OPTION_TASK_LINK,
 101   OPTION_TBSS,
 102   OPTION_TDATA,
 103   OPTION_TTEXT,
 104   OPTION_TRADITIONAL_FORMAT,
 105   OPTION_UR,
 106   OPTION_VERBOSE,
 107   OPTION_VERSION,
 108   OPTION_VERSION_SCRIPT,
 109   OPTION_VERSION_EXPORTS_SECTION,
 110   OPTION_WARN_COMMON,
 111   OPTION_WARN_CONSTRUCTORS,
 112   OPTION_WARN_FATAL,
 113   OPTION_WARN_MULTIPLE_GP,
 114   OPTION_WARN_ONCE,
 115   OPTION_WARN_SECTION_ALIGN,
 116   OPTION_SPLIT_BY_RELOC,
 117   OPTION_SPLIT_BY_FILE ,
 118   OPTION_WHOLE_ARCHIVE,
 119   OPTION_ADD_NEEDED,
 120   OPTION_NO_ADD_NEEDED,
 121   OPTION_AS_NEEDED,
 122   OPTION_NO_AS_NEEDED,
 123   OPTION_WRAP,
 124   OPTION_FORCE_EXE_SUFFIX,
 125   OPTION_GC_SECTIONS,
 126   OPTION_NO_GC_SECTIONS,
 127   OPTION_PRINT_GC_SECTIONS,
 128   OPTION_NO_PRINT_GC_SECTIONS,
 129   OPTION_HASH_SIZE,
 130   OPTION_CHECK_SECTIONS,
 131   OPTION_NO_CHECK_SECTIONS,
 132   OPTION_NO_UNDEFINED,
 133   OPTION_INIT,
 134   OPTION_FINI,
 135   OPTION_SECTION_START,
 136   OPTION_UNIQUE,
 137   OPTION_TARGET_HELP,
 138   OPTION_ALLOW_SHLIB_UNDEFINED,
 139   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 140   OPTION_ALLOW_MULTIPLE_DEFINITION,
 141   OPTION_NO_UNDEFINED_VERSION,
 142   OPTION_DEFAULT_SYMVER,
 143   OPTION_DEFAULT_IMPORTED_SYMVER,
 144   OPTION_DISCARD_NONE,
 145   OPTION_SPARE_DYNAMIC_TAGS,
 146   OPTION_NO_DEFINE_COMMON,
 147   OPTION_NOSTDLIB,
 148   OPTION_NO_OMAGIC,
 149   OPTION_STRIP_DISCARDED,
 150   OPTION_NO_STRIP_DISCARDED,
 151   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 152   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 153   OPTION_PIE,
 154   OPTION_UNRESOLVED_SYMBOLS,
 155   OPTION_WARN_UNRESOLVED_SYMBOLS,
 156   OPTION_ERROR_UNRESOLVED_SYMBOLS,
 157   OPTION_WARN_SHARED_TEXTREL,
 158   OPTION_REDUCE_MEMORY_OVERHEADS
 159 };
 160
 161 /* The long options.  This structure is used for both the option
 162    parsing and the help text.  */
 163
 164 struct ld_option
 165 {
 166   /* The long option information.  */
 167   struct option opt;
 168   /* The short option with the same meaning ('\0' if none).  */
 169   char shortopt;
 170   /* The name of the argument (NULL if none).  */
 171   const char *arg;
 172   /* The documentation string.  If this is NULL, this is a synonym for
 173      the previous option.  */
 174   const char *doc;
 175   enum {
 176     /* Use one dash before long option name.  */
 177     ONE_DASH,
 178     /* Use two dashes before long option name.  */
 179     TWO_DASHES,
 180     /* Only accept two dashes before the long option name.
 181        This is an overloading of the use of this enum, since originally it
 182        was only intended to tell the --help display function how to display
 183        the long option name.  This feature was added in order to resolve
 184        the confusion about the -omagic command line switch.  Is it setting
 185        the output file name to "magic" or is it setting the NMAGIC flag on
 186        the output ?  It has been decided that it is setting the output file
 187        name, and that if you want to set the NMAGIC flag you should use -N
 188        or --omagic.  */
 189     EXACTLY_TWO_DASHES,
 190     /* Don't mention this option in --help output.  */
 191     NO_HELP
 192   } control;
 193 };
 194
 195 static const struct ld_option ld_options[] =
 196 {
 197   { {NULL, required_argument, NULL, '\0'},
 198     'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 199     ONE_DASH },
 200   { {"architecture", required_argument, NULL, 'A'},
 201     'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 202   { {"format", required_argument, NULL, 'b'},
 203     'b', N_("TARGET"), N_("Specify target for following input files"),
 204     TWO_DASHES },
 205   { {"mri-script", required_argument, NULL, 'c'},
 206     'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 207   { {"dc", no_argument, NULL, 'd'},
 208     'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 209   { {"dp", no_argument, NULL, 'd'},
 210     '\0', NULL, NULL, ONE_DASH },
 211   { {"entry", required_argument, NULL, 'e'},
 212     'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 213   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 214     'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 215   { {"EB", no_argument, NULL, OPTION_EB},
 216     '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 217   { {"EL", no_argument, NULL, OPTION_EL},
 218     '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 219   { {"auxiliary", required_argument, NULL, 'f'},
 220     'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 221     TWO_DASHES },
 222   { {"filter", required_argument, NULL, 'F'},
 223     'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
 224     TWO_DASHES },
 225   { {NULL, no_argument, NULL, '\0'},
 226     'g', NULL, N_("Ignored"), ONE_DASH },
 227   { {"gpsize", required_argument, NULL, 'G'},
 228     'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 229     TWO_DASHES },
 230   { {"soname", required_argument, NULL, OPTION_SONAME},
 231     'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 232   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 233     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
 234     TWO_DASHES },
 235   { {"library", required_argument, NULL, 'l'},
 236     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 237   { {"library-path", required_argument, NULL, 'L'},
 238     'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
 239     TWO_DASHES },
 240   { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
 241     '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
 242   { {NULL, required_argument, NULL, '\0'},
 243     'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 244   { {"print-map", no_argument, NULL, 'M'},
 245     'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 246   { {"nmagic", no_argument, NULL, 'n'},
 247     'n', NULL, N_("Do not page align data"), TWO_DASHES },
 248   { {"omagic", no_argument, NULL, 'N'},
 249     'N', NULL, N_("Do not page align data, do not make text readonly"),
 250     EXACTLY_TWO_DASHES },
 251   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 252     '\0', NULL, N_("Page align data, make text readonly"),
 253     EXACTLY_TWO_DASHES },
 254   { {"output", required_argument, NULL, 'o'},
 255     'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 256   { {NULL, required_argument, NULL, '\0'},
 257     'O', NULL, N_("Optimize output file"), ONE_DASH },
 258   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 259     '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 260   { {"emit-relocs", no_argument, NULL, 'q'},
 261     'q', NULL, "Generate relocations in final output", TWO_DASHES },
 262   { {"relocatable", no_argument, NULL, 'r'},
 263     'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 264   { {NULL, no_argument, NULL, '\0'},
 265     'i', NULL, NULL, ONE_DASH },
 266   { {"just-symbols", required_argument, NULL, 'R'},
 267     'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 268     TWO_DASHES },
 269   { {"strip-all", no_argument, NULL, 's'},
 270     's', NULL, N_("Strip all symbols"), TWO_DASHES },
 271   { {"strip-debug", no_argument, NULL, 'S'},
 272     'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 273   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 274     '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 275   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 276     '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 277   { {"trace", no_argument, NULL, 't'},
 278     't', NULL, N_("Trace file opens"), TWO_DASHES },
 279   { {"script", required_argument, NULL, 'T'},
 280     'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 281   { {"undefined", required_argument, NULL, 'u'},
 282     'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
 283     TWO_DASHES },
 284   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 285     '\0', N_("[=SECTION]"),
 286     N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 287   { {"Ur", no_argument, NULL, OPTION_UR},
 288     '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 289   { {"version", no_argument, NULL, OPTION_VERSION},
 290     'v', NULL, N_("Print version information"), TWO_DASHES },
 291   { {NULL, no_argument, NULL, '\0'},
 292     'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 293   { {"discard-all", no_argument, NULL, 'x'},
 294     'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 295   { {"discard-locals", no_argument, NULL, 'X'},
 296     'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 297   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 298     '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 299   { {"trace-symbol", required_argument, NULL, 'y'},
 300     'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 301   { {NULL, required_argument, NULL, '\0'},
 302     'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
 303     ONE_DASH },
 304   { {"start-group", no_argument, NULL, '('},
 305     '(', NULL, N_("Start a group"), TWO_DASHES },
 306   { {"end-group", no_argument, NULL, ')'},
 307     ')', NULL, N_("End a group"), TWO_DASHES },
 308   { {"accept-unknown-input-arch", no_argument, NULL,
 309      OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 310     '\0', NULL,
 311     N_("Accept input files whose architecture cannot be determined"),
 312     TWO_DASHES },
 313   { {"no-accept-unknown-input-arch", no_argument, NULL,
 314      OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 315     '\0', NULL, N_("Reject input files whose architecture is unknown"),
 316     TWO_DASHES },
 317   { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
 318     '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
 319                    "\t\t\t\tfollowing dynamic libs"), TWO_DASHES },
 320   { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
 321     '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
 322                    "\t\t\t\tin following dynamic libs"), TWO_DASHES },
 323   { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
 324     '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
 325     TWO_DASHES },
 326   { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
 327     '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
 328     TWO_DASHES },
 329   { {"assert", required_argument, NULL, OPTION_ASSERT},
 330     '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 331   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 332     '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 333   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 334     '\0', NULL, NULL, ONE_DASH },
 335   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 336     '\0', NULL, NULL, ONE_DASH },
 337   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 338     '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 339   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 340     '\0', NULL, NULL, ONE_DASH },
 341   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 342     '\0', NULL, NULL, ONE_DASH },
 343   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 344     '\0', NULL, NULL, ONE_DASH },
 345   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 346     '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 347   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 348     '\0', NULL, N_("Check section addresses for overlaps (default)"),
 349     TWO_DASHES },
 350   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 351     '\0', NULL, N_("Do not check section addresses for overlaps"),
 352     TWO_DASHES },
 353   { {"cref", no_argument, NULL, OPTION_CREF},
 354     '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 355   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 356     '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 357   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 358     '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
 359     TWO_DASHES },
 360   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 361     '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 362   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 363     '\0', NULL, N_("Treat warnings as errors"),
 364     TWO_DASHES },
 365   { {"fini", required_argument, NULL, OPTION_FINI},
 366     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 367   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 368     '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 369   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 370     '\0', NULL, N_("Remove unused sections (on some targets)"),
 371     TWO_DASHES },
 372   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 373     '\0', NULL, N_("Don't remove unused sections (default)"),
 374     TWO_DASHES },
 375   { {"print-gc-sections", no_argument, NULL, OPTION_PRINT_GC_SECTIONS},
 376     '\0', NULL, N_("List removed unused sections on stderr"),
 377     TWO_DASHES },
 378   { {"no-print-gc-sections", no_argument, NULL, OPTION_NO_PRINT_GC_SECTIONS},
 379     '\0', NULL, N_("Do not list removed unused sections"),
 380     TWO_DASHES },
 381   { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
 382     '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
 383     TWO_DASHES },
 384   { {"help", no_argument, NULL, OPTION_HELP},
 385     '\0', NULL, N_("Print option help"), TWO_DASHES },
 386   { {"init", required_argument, NULL, OPTION_INIT},
 387     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 388   { {"Map", required_argument, NULL, OPTION_MAP},
 389     '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 390   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 391     '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 392   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 393     '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 394   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 395     '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 396   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 397     '\0', NULL, N_("Do not allow unresolved references in object files"),
 398     TWO_DASHES },
 399   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 400     '\0', NULL, N_("Allow unresolved references in shared libaries"),
 401     TWO_DASHES },
 402   { {"no-allow-shlib-undefined", no_argument, NULL,
 403      OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 404     '\0', NULL, N_("Do not allow unresolved references in shared libs"),
 405     TWO_DASHES },
 406   { {"allow-multiple-definition", no_argument, NULL,
 407      OPTION_ALLOW_MULTIPLE_DEFINITION},
 408     '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 409   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 410     '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 411   { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
 412     '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
 413   { {"default-imported-symver", no_argument, NULL,
 414       OPTION_DEFAULT_IMPORTED_SYMVER},
 415     '\0', NULL, N_("Create default symbol version for imported symbols"),
 416     TWO_DASHES },
 417   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 418     '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 419   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 420     '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 421   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 422     '\0', NULL, N_("Create an output file even if errors occur"),
 423     TWO_DASHES },
 424   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 425     '\0', NULL, NULL, NO_HELP },
 426   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 427     '\0', NULL, N_("Only use library directories specified on\n"
 428                    "\t\t\t\tthe command line"), ONE_DASH },
 429   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 430     '\0', N_("TARGET"), N_("Specify target of output file"),
 431     EXACTLY_TWO_DASHES },
 432   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 433     '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 434   { {"reduce-memory-overheads", no_argument, NULL,
 435      OPTION_REDUCE_MEMORY_OVERHEADS},
 436     '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
 437     TWO_DASHES },
 438   { {"relax", no_argument, NULL, OPTION_RELAX},
 439     '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 440   { {"retain-symbols-file", required_argument, NULL,
 441      OPTION_RETAIN_SYMBOLS_FILE},
 442     '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 443   { {"rpath", required_argument, NULL, OPTION_RPATH},
 444     '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 445   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 446     '\0', N_("PATH"), N_("Set link time shared library search path"),
 447     ONE_DASH },
 448   { {"shared", no_argument, NULL, OPTION_SHARED},
 449     '\0', NULL, N_("Create a shared library"), ONE_DASH },
 450   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 451     '\0', NULL, NULL, ONE_DASH },
 452   { {"pie", no_argument, NULL, OPTION_PIE},
 453     '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 454   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 455     '\0', NULL, NULL, TWO_DASHES },
 456   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 457     '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 458   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 459     '\0', NULL, NULL, NO_HELP },
 460   { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
 461     '\0', N_("name|alignment"),
 462     N_("Sort sections by name or maximum alignment"), TWO_DASHES },
 463   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 464     '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
 465     TWO_DASHES },
 466   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 467     '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
 468     TWO_DASHES },
 469   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 470     '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
 471     TWO_DASHES },
 472   { {"stats", no_argument, NULL, OPTION_STATS},
 473     '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 474   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 475     '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 476   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 477     '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 478   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 479     '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 480   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 481     '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
 482     TWO_DASHES },
 483   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 484     '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 485   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 486     '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 487   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 488     '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 489   { {"unresolved-symbols=<method>", required_argument, NULL,
 490      OPTION_UNRESOLVED_SYMBOLS},
 491     '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
 492                    "\t\t\t\tignore-all, report-all, ignore-in-object-files,\n"
 493                    "\t\t\t\tignore-in-shared-libs"), TWO_DASHES },
 494   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 495     '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 496   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 497     '\0', NULL, NULL, NO_HELP },
 498   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 499     '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 500   { {"version-exports-section", required_argument, NULL,
 501      OPTION_VERSION_EXPORTS_SECTION },
 502     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
 503                            "\t\t\t\tSYMBOL as the version."), TWO_DASHES },
 504   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 505     '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 506   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 507     '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 508     TWO_DASHES },
 509   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 510     '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 511   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 512     '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 513   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 514     '\0', NULL, N_("Warn if start of section changes due to alignment"),
 515     TWO_DASHES },
 516   { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
 517     '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
 518     TWO_DASHES },
 519   { {"warn-unresolved-symbols", no_argument, NULL,
 520      OPTION_WARN_UNRESOLVED_SYMBOLS},
 521     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 522   { {"error-unresolved-symbols", no_argument, NULL,
 523      OPTION_ERROR_UNRESOLVED_SYMBOLS},
 524     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 525   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 526     '\0', NULL, N_("Include all objects from following archives"),
 527     TWO_DASHES },
 528   { {"wrap", required_argument, NULL, OPTION_WRAP},
 529     '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 530 };
 531
 532 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 533
 534 void
 535 parse_args (unsigned argc, char **argv)
 536 {
 537   unsigned i;
 538   int is, il, irl;
 539   int ingroup = 0;
 540   char *default_dirlist = NULL;
 541   char *shortopts;
 542   struct option *longopts;
 543   struct option *really_longopts;
 544   int last_optind;
 545   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 546
 547   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 548   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 549   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 550
 551   /* Starting the short option string with '-' is for programs that
 552      expect options and other ARGV-elements in any order and that care about
 553      the ordering of the two.  We describe each non-option ARGV-element
 554      as if it were the argument of an option with character code 1.  */
 555   shortopts[0] = '-';
 556   is = 1;
 557   il = 0;
 558   irl = 0;
 559   for (i = 0; i < OPTION_COUNT; i++)
 560     {
 561       if (ld_options[i].shortopt != '\0')
 562         {
 563           shortopts[is] = ld_options[i].shortopt;
 564           ++is;
 565           if (ld_options[i].opt.has_arg == required_argument
 566               || ld_options[i].opt.has_arg == optional_argument)
 567             {
 568               shortopts[is] = ':';
 569               ++is;
 570               if (ld_options[i].opt.has_arg == optional_argument)
 571                 {
 572                   shortopts[is] = ':';
 573                   ++is;
 574                 }
 575             }
 576         }
 577       if (ld_options[i].opt.name != NULL)
 578         {
 579           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 580             {
 581               really_longopts[irl] = ld_options[i].opt;
 582               ++irl;
 583             }
 584           else
 585             {
 586               longopts[il] = ld_options[i].opt;
 587               ++il;
 588             }
 589         }
 590     }
 591   shortopts[is] = '\0';
 592   longopts[il].name = NULL;
 593   really_longopts[irl].name = NULL;
 594
 595   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 596
 597   /* The -G option is ambiguous on different platforms.  Sometimes it
 598      specifies the largest data size to put into the small data
 599      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 600      the first form takes an argument, while the second does not.
 601
 602      We need to permit the --shared form because on some platforms,
 603      such as Solaris, gcc -shared will pass -G to the linker.
 604
 605      To permit either usage, we look through the argument list.  If we
 606      find -G not followed by a number, we change it into --shared.
 607      This will work for most normal cases.  */
 608   for (i = 1; i < argc; i++)
 609     if (strcmp (argv[i], "-G") == 0
 610         && (i + 1 >= argc
 611             || ! ISDIGIT (argv[i + 1][0])))
 612       argv[i] = (char *) "--shared";
 613
 614   /* Because we permit long options to start with a single dash, and
 615      we have a --library option, and the -l option is conventionally
 616      used with an immediately following argument, we can have bad
 617      results if somebody tries to use -l with a library whose name
 618      happens to start with "ibrary", as in -li.  We avoid problems by
 619      simply turning -l into --library.  This means that users will
 620      have to use two dashes in order to use --library, which is OK
 621      since that's how it is documented.
 622
 623      FIXME: It's possible that this problem can arise for other short
 624      options as well, although the user does always have the recourse
 625      of adding a space between the option and the argument.  */
 626   for (i = 1; i < argc; i++)
 627     {
 628       if (argv[i][0] == '-'
 629           && argv[i][1] == 'l'
 630           && argv[i][2] != '\0')
 631         {
 632           char *n;
 633
 634           n = xmalloc (strlen (argv[i]) + 20);
 635           sprintf (n, "--library=%s", argv[i] + 2);
 636           argv[i] = n;
 637         }
 638     }
 639
 640   last_optind = -1;
 641   while (1)
 642     {
 643       int longind;
 644       int optc;
 645
 646       /* Using last_optind lets us avoid calling ldemul_parse_args
 647          multiple times on a single option, which would lead to
 648          confusion in the internal static variables maintained by
 649          getopt.  This could otherwise happen for an argument like
 650          -nx, in which the -n is parsed as a single option, and we
 651          loop around to pick up the -x.  */
 652       if (optind != last_optind)
 653         if (ldemul_parse_args (argc, argv))
 654           continue;
 655
 656       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 657          can indicate a long option.  */
 658       opterr = 0;
 659       last_optind = optind;
 660       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 661       if (optc == '?')
 662         {
 663           optind = last_optind;
 664           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 665         }
 666
 667       if (ldemul_handle_option (optc))
 668         continue;
 669
 670       if (optc == -1)
 671         break;
 672
 673       switch (optc)
 674         {
 675         case '?':
 676           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 677         default:
 678           einfo (_("%P%F: use the --help option for usage information\n"));
 679
 680         case 1:                 /* File name.  */
 681           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 682           break;
 683
 684         case OPTION_IGNORE:
 685           break;
 686         case 'a':
 687           /* For HP/UX compatibility.  Actually -a shared should mean
 688              ``use only shared libraries'' but, then, we don't
 689              currently support shared libraries on HP/UX anyhow.  */
 690           if (strcmp (optarg, "archive") == 0)
 691             config.dynamic_link = FALSE;
 692           else if (strcmp (optarg, "shared") == 0
 693                    || strcmp (optarg, "default") == 0)
 694             config.dynamic_link = TRUE;
 695           else
 696             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 697           break;
 698         case OPTION_ASSERT:
 699           /* FIXME: We just ignore these, but we should handle them.  */
 700           if (strcmp (optarg, "definitions") == 0)
 701             ;
 702           else if (strcmp (optarg, "nodefinitions") == 0)
 703             ;
 704           else if (strcmp (optarg, "nosymbolic") == 0)
 705             ;
 706           else if (strcmp (optarg, "pure-text") == 0)
 707             ;
 708           else
 709             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 710           break;
 711         case 'A':
 712           ldfile_add_arch (optarg);
 713           break;
 714         case 'b':
 715           lang_add_target (optarg);
 716           break;
 717         case 'c':
 718           ldfile_open_command_file (optarg);
 719           parser_input = input_mri_script;
 720           yyparse ();
 721           break;
 722         case OPTION_CALL_SHARED:
 723           config.dynamic_link = TRUE;
 724           break;
 725         case OPTION_NON_SHARED:
 726           config.dynamic_link = FALSE;
 727           break;
 728         case OPTION_CREF:
 729           command_line.cref = TRUE;
 730           link_info.notice_all = TRUE;
 731           break;
 732         case 'd':
 733           command_line.force_common_definition = TRUE;
 734           break;
 735         case OPTION_DEFSYM:
 736           lex_string = optarg;
 737           lex_redirect (optarg);
 738           parser_input = input_defsym;
 739           parsing_defsym = 1;
 740           yyparse ();
 741           parsing_defsym = 0;
 742           lex_string = NULL;
 743           break;
 744         case OPTION_DEMANGLE:
 745           demangling = TRUE;
 746           if (optarg != NULL)
 747             {
 748               enum demangling_styles style;
 749
 750               style = cplus_demangle_name_to_style (optarg);
 751               if (style == unknown_demangling)
 752                 einfo (_("%F%P: unknown demangling style `%s'"),
 753                        optarg);
 754
 755               cplus_demangle_set_style (style);
 756             }
 757           break;
 758         case 'I':               /* Used on Solaris.  */
 759         case OPTION_DYNAMIC_LINKER:
 760           command_line.interpreter = optarg;
 761           break;
 762         case OPTION_SYSROOT:
 763           /* Already handled in ldmain.c.  */
 764           break;
 765         case OPTION_EB:
 766           command_line.endian = ENDIAN_BIG;
 767           break;
 768         case OPTION_EL:
 769           command_line.endian = ENDIAN_LITTLE;
 770           break;
 771         case OPTION_EMBEDDED_RELOCS:
 772           command_line.embedded_relocs = TRUE;
 773           break;
 774         case OPTION_EXPORT_DYNAMIC:
 775         case 'E': /* HP/UX compatibility.  */
 776           link_info.export_dynamic = TRUE;
 777           break;
 778         case 'e':
 779           lang_add_entry (optarg, TRUE);
 780           break;
 781         case 'f':
 782           if (command_line.auxiliary_filters == NULL)
 783             {
 784               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 785               command_line.auxiliary_filters[0] = optarg;
 786               command_line.auxiliary_filters[1] = NULL;
 787             }
 788           else
 789             {
 790               int c;
 791               char **p;
 792
 793               c = 0;
 794               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 795                 ++c;
 796               command_line.auxiliary_filters
 797                 = xrealloc (command_line.auxiliary_filters,
 798                             (c + 2) * sizeof (char *));
 799               command_line.auxiliary_filters[c] = optarg;
 800               command_line.auxiliary_filters[c + 1] = NULL;
 801             }
 802           break;
 803         case 'F':
 804           command_line.filter_shlib = optarg;
 805           break;
 806         case OPTION_FORCE_EXE_SUFFIX:
 807           command_line.force_exe_suffix = TRUE;
 808           break;
 809         case 'G':
 810           {
 811             char *end;
 812             g_switch_value = strtoul (optarg, &end, 0);
 813             if (*end)
 814               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 815           }
 816           break;
 817         case 'g':
 818           /* Ignore.  */
 819           break;
 820         case OPTION_GC_SECTIONS:
 821           link_info.gc_sections = TRUE;
 822           break;
 823         case OPTION_PRINT_GC_SECTIONS:
 824           link_info.print_gc_sections = TRUE;
 825           break;
 826         case OPTION_HELP:
 827           help ();
 828           xexit (0);
 829           break;
 830         case 'L':
 831           ldfile_add_library_path (optarg, TRUE);
 832           break;
 833         case 'l':
 834           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 835           break;
 836         case 'M':
 837           config.map_filename = "-";
 838           break;
 839         case 'm':
 840           /* Ignore.  Was handled in a pre-parse.   */
 841           break;
 842         case OPTION_MAP:
 843           config.map_filename = optarg;
 844           break;
 845         case 'N':
 846           config.text_read_only = FALSE;
 847           config.magic_demand_paged = FALSE;
 848           config.dynamic_link = FALSE;
 849           break;
 850         case OPTION_NO_OMAGIC:
 851           config.text_read_only = TRUE;
 852           config.magic_demand_paged = TRUE;
 853           /* NB/ Does not set dynamic_link to TRUE.
 854              Use --call-shared or -Bdynamic for this.  */
 855           break;
 856         case 'n':
 857           config.magic_demand_paged = FALSE;
 858           config.dynamic_link = FALSE;
 859           break;
 860         case OPTION_NO_DEFINE_COMMON:
 861           command_line.inhibit_common_definition = TRUE;
 862           break;
 863         case OPTION_NO_DEMANGLE:
 864           demangling = FALSE;
 865           break;
 866         case OPTION_NO_GC_SECTIONS:
 867           link_info.gc_sections = FALSE;
 868           break;
 869         case OPTION_NO_PRINT_GC_SECTIONS:
 870           link_info.print_gc_sections = FALSE;
 871           break;
 872         case OPTION_NO_KEEP_MEMORY:
 873           link_info.keep_memory = FALSE;
 874           break;
 875         case OPTION_NO_UNDEFINED:
 876           link_info.unresolved_syms_in_objects
 877             = how_to_report_unresolved_symbols;
 878           break;
 879         case OPTION_ALLOW_SHLIB_UNDEFINED:
 880           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 881           break;
 882         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 883           link_info.unresolved_syms_in_shared_libs
 884             = how_to_report_unresolved_symbols;
 885           break;
 886         case OPTION_UNRESOLVED_SYMBOLS:
 887           if (strcmp (optarg, "ignore-all") == 0)
 888             {
 889               link_info.unresolved_syms_in_objects = RM_IGNORE;
 890               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 891             }
 892           else if (strcmp (optarg, "report-all") == 0)
 893             {
 894               link_info.unresolved_syms_in_objects
 895                 = how_to_report_unresolved_symbols;
 896               link_info.unresolved_syms_in_shared_libs
 897                 = how_to_report_unresolved_symbols;
 898             }
 899           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 900             {
 901               link_info.unresolved_syms_in_objects = RM_IGNORE;
 902               link_info.unresolved_syms_in_shared_libs
 903                 = how_to_report_unresolved_symbols;
 904             }
 905           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 906             {
 907               link_info.unresolved_syms_in_objects
 908                 = how_to_report_unresolved_symbols;
 909               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 910             }
 911           else
 912             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 913           break;
 914         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 915           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 916           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 917             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 918           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 919             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 920           break;
 921
 922         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 923           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 924           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 925             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 926           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 927             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 928           break;
 929         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 930           link_info.allow_multiple_definition = TRUE;
 931           break;
 932         case OPTION_NO_UNDEFINED_VERSION:
 933           link_info.allow_undefined_version = FALSE;
 934           break;
 935         case OPTION_DEFAULT_SYMVER:
 936           link_info.create_default_symver = TRUE;
 937           break;
 938         case OPTION_DEFAULT_IMPORTED_SYMVER:
 939           link_info.default_imported_symver = TRUE;
 940           break;
 941         case OPTION_NO_WARN_MISMATCH:
 942           command_line.warn_mismatch = FALSE;
 943           break;
 944         case OPTION_NOINHIBIT_EXEC:
 945           force_make_executable = TRUE;
 946           break;
 947         case OPTION_NOSTDLIB:
 948           config.only_cmd_line_lib_dirs = TRUE;
 949           break;
 950         case OPTION_NO_WHOLE_ARCHIVE:
 951           whole_archive = FALSE;
 952           break;
 953         case 'O':
 954           /* FIXME "-O<non-digits> <value>" used to set the address of
 955              section <non-digits>.  Was this for compatibility with
 956              something, or can we create a new option to do that
 957              (with a syntax similar to -defsym)?
 958              getopt can't handle two args to an option without kludges.  */
 959
 960           /* Enable optimizations of output files.  */
 961           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 962           break;
 963         case 'o':
 964           lang_add_output (optarg, 0);
 965           break;
 966         case OPTION_OFORMAT:
 967           lang_add_output_format (optarg, NULL, NULL, 0);
 968           break;
 969         case 'q':
 970           link_info.emitrelocations = TRUE;
 971           break;
 972         case 'i':
 973         case 'r':
 974           if (optind == last_optind)
 975             /* This can happen if the user put "-rpath,a" on the command
 976                line.  (Or something similar.  The comma is important).
 977                Getopt becomes confused and thinks that this is a -r option
 978                but it cannot parse the text after the -r so it refuses to
 979                increment the optind counter.  Detect this case and issue
 980                an error message here.  We cannot just make this a warning,
 981                increment optind, and continue because getopt is too confused
 982                and will seg-fault the next time around.  */
 983             einfo(_("%P%F: bad -rpath option\n"));
 984
 985           link_info.relocatable = TRUE;
 986           config.build_constructors = FALSE;
 987           config.magic_demand_paged = FALSE;
 988           config.text_read_only = FALSE;
 989           config.dynamic_link = FALSE;
 990           break;
 991         case 'R':
 992           /* The GNU linker traditionally uses -R to mean to include
 993              only the symbols from a file.  The Solaris linker uses -R
 994              to set the path used by the runtime linker to find
 995              libraries.  This is the GNU linker -rpath argument.  We
 996              try to support both simultaneously by checking the file
 997              named.  If it is a directory, rather than a regular file,
 998              we assume -rpath was meant.  */
 999           {
1000             struct stat s;
1001
1002             if (stat (optarg, &s) >= 0
1003                 && ! S_ISDIR (s.st_mode))
1004               {
1005                 lang_add_input_file (optarg,
1006                                      lang_input_file_is_symbols_only_enum,
1007                                      NULL);
1008                 break;
1009               }
1010           }
1011           /* Fall through.  */
1012         case OPTION_RPATH:
1013           if (command_line.rpath == NULL)
1014             command_line.rpath = xstrdup (optarg);
1015           else
1016             {
1017               size_t rpath_len = strlen (command_line.rpath);
1018               size_t optarg_len = strlen (optarg);
1019               char *buf;
1020               char *cp = command_line.rpath;
1021
1022               /* First see whether OPTARG is already in the path.  */
1023               do
1024                 {
1025                   size_t idx = 0;
1026
1027                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
1028                     ++idx;
1029                   if (optarg[idx] == '\0'
1030                       && (cp[idx] == '\0' || cp[idx] == ':'))
1031                     /* We found it.  */
1032                     break;
1033
1034                   /* Not yet found.  */
1035                   cp = strchr (cp, ':');
1036                   if (cp != NULL)
1037                     ++cp;
1038                 }
1039               while (cp != NULL);
1040
1041               if (cp == NULL)
1042                 {
1043                   buf = xmalloc (rpath_len + optarg_len + 2);
1044                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
1045                   free (command_line.rpath);
1046                   command_line.rpath = buf;
1047                 }
1048             }
1049           break;
1050         case OPTION_RPATH_LINK:
1051           if (command_line.rpath_link == NULL)
1052             command_line.rpath_link = xstrdup (optarg);
1053           else
1054             {
1055               char *buf;
1056
1057               buf = xmalloc (strlen (command_line.rpath_link)
1058                              + strlen (optarg)
1059                              + 2);
1060               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
1061               free (command_line.rpath_link);
1062               command_line.rpath_link = buf;
1063             }
1064           break;
1065         case OPTION_RELAX:
1066           command_line.relax = TRUE;
1067           break;
1068         case OPTION_RETAIN_SYMBOLS_FILE:
1069           add_keepsyms_file (optarg);
1070           break;
1071         case 'S':
1072           link_info.strip = strip_debugger;
1073           break;
1074         case 's':
1075           link_info.strip = strip_all;
1076           break;
1077         case OPTION_STRIP_DISCARDED:
1078           link_info.strip_discarded = TRUE;
1079           break;
1080         case OPTION_NO_STRIP_DISCARDED:
1081           link_info.strip_discarded = FALSE;
1082           break;
1083         case OPTION_SHARED:
1084           if (config.has_shared)
1085             {
1086               link_info.shared = TRUE;
1087               /* When creating a shared library, the default
1088                  behaviour is to ignore any unresolved references.  */
1089               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1090                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1091               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1092                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1093             }
1094           else
1095             einfo (_("%P%F: -shared not supported\n"));
1096           break;
1097         case OPTION_PIE:
1098           if (config.has_shared)
1099             {
1100               link_info.shared = TRUE;
1101               link_info.pie = TRUE;
1102             }
1103           else
1104             einfo (_("%P%F: -pie not supported\n"));
1105           break;
1106         case 'h':               /* Used on Solaris.  */
1107         case OPTION_SONAME:
1108           command_line.soname = optarg;
1109           break;
1110         case OPTION_SORT_COMMON:
1111           config.sort_common = TRUE;
1112           break;
1113         case OPTION_SORT_SECTION:
1114           if (strcmp (optarg, N_("name")) == 0)
1115             sort_section = by_name;
1116           else if (strcmp (optarg, N_("alignment")) == 0)
1117             sort_section = by_alignment;
1118           else
1119             einfo (_("%P%F: invalid section sorting option: %s\n"),
1120                    optarg);
1121           break;
1122         case OPTION_STATS:
1123           config.stats = TRUE;
1124           break;
1125         case OPTION_SYMBOLIC:
1126           link_info.symbolic = TRUE;
1127           break;
1128         case 't':
1129           trace_files = TRUE;
1130           break;
1131         case 'T':
1132           ldfile_open_command_file (optarg);
1133           parser_input = input_script;
1134           yyparse ();
1135           break;
1136         case OPTION_SECTION_START:
1137           {
1138             char *optarg2;
1139             char *sec_name;
1140             int len;
1141
1142             /* Check for <something>=<somthing>...  */
1143             optarg2 = strchr (optarg, '=');
1144             if (optarg2 == NULL)
1145               einfo (_("%P%F: invalid argument to option"
1146                        " \"--section-start\"\n"));
1147
1148             optarg2++;
1149
1150             /* So far so good.  Are all the args present?  */
1151             if ((*optarg == '\0') || (*optarg2 == '\0'))
1152               einfo (_("%P%F: missing argument(s) to option"
1153                        " \"--section-start\"\n"));
1154
1155             /* We must copy the section name as set_section_start
1156                doesn't do it for us.  */
1157             len = optarg2 - optarg;
1158             sec_name = xmalloc (len);
1159             memcpy (sec_name, optarg, len - 1);
1160             sec_name[len - 1] = 0;
1161
1162             /* Then set it...  */
1163             set_section_start (sec_name, optarg2);
1164           }
1165           break;
1166         case OPTION_TARGET_HELP:
1167           /* Mention any target specific options.  */
1168           ldemul_list_emulation_options (stdout);
1169           exit (0);
1170         case OPTION_TBSS:
1171           set_segment_start (".bss", optarg);
1172           break;
1173         case OPTION_TDATA:
1174           set_segment_start (".data", optarg);
1175           break;
1176         case OPTION_TTEXT:
1177           set_segment_start (".text", optarg);
1178           break;
1179         case OPTION_TRADITIONAL_FORMAT:
1180           link_info.traditional_format = TRUE;
1181           break;
1182         case OPTION_TASK_LINK:
1183           link_info.task_link = TRUE;
1184           /* Fall through - do an implied -r option.  */
1185         case OPTION_UR:
1186           link_info.relocatable = TRUE;
1187           config.build_constructors = TRUE;
1188           config.magic_demand_paged = FALSE;
1189           config.text_read_only = FALSE;
1190           config.dynamic_link = FALSE;
1191           break;
1192         case 'u':
1193           ldlang_add_undef (optarg);
1194           break;
1195         case OPTION_UNIQUE:
1196           if (optarg != NULL)
1197             lang_add_unique (optarg);
1198           else
1199             config.unique_orphan_sections = TRUE;
1200           break;
1201         case OPTION_VERBOSE:
1202           ldversion (1);
1203           version_printed = TRUE;
1204           trace_file_tries = TRUE;
1205           overflow_cutoff_limit = -2;
1206           break;
1207         case 'v':
1208           ldversion (0);
1209           version_printed = TRUE;
1210           break;
1211         case 'V':
1212           ldversion (1);
1213           version_printed = TRUE;
1214           break;
1215         case OPTION_VERSION:
1216           ldversion (2);
1217           xexit (0);
1218           break;
1219         case OPTION_VERSION_SCRIPT:
1220           /* This option indicates a small script that only specifies
1221              version information.  Read it, but don't assume that
1222              we've seen a linker script.  */
1223           {
1224             FILE *hold_script_handle;
1225
1226             hold_script_handle = saved_script_handle;
1227             ldfile_open_command_file (optarg);
1228             saved_script_handle = hold_script_handle;
1229             parser_input = input_version_script;
1230             yyparse ();
1231           }
1232           break;
1233         case OPTION_VERSION_EXPORTS_SECTION:
1234           /* This option records a version symbol to be applied to the
1235              symbols listed for export to be found in the object files
1236              .exports sections.  */
1237           command_line.version_exports_section = optarg;
1238           break;
1239         case OPTION_WARN_COMMON:
1240           config.warn_common = TRUE;
1241           break;
1242         case OPTION_WARN_CONSTRUCTORS:
1243           config.warn_constructors = TRUE;
1244           break;
1245         case OPTION_WARN_FATAL:
1246           config.fatal_warnings = TRUE;
1247           break;
1248         case OPTION_WARN_MULTIPLE_GP:
1249           config.warn_multiple_gp = TRUE;
1250           break;
1251         case OPTION_WARN_ONCE:
1252           config.warn_once = TRUE;
1253           break;
1254         case OPTION_WARN_SECTION_ALIGN:
1255           config.warn_section_align = TRUE;
1256           break;
1257         case OPTION_WARN_SHARED_TEXTREL:
1258           link_info.warn_shared_textrel = TRUE;
1259           break;
1260         case OPTION_WHOLE_ARCHIVE:
1261           whole_archive = TRUE;
1262           break;
1263         case OPTION_ADD_NEEDED:
1264           add_needed = TRUE;
1265           break;
1266         case OPTION_NO_ADD_NEEDED:
1267           add_needed = FALSE;
1268           break;
1269         case OPTION_AS_NEEDED:
1270           as_needed = TRUE;
1271           break;
1272         case OPTION_NO_AS_NEEDED:
1273           as_needed = FALSE;
1274           break;
1275         case OPTION_WRAP:
1276           add_wrap (optarg);
1277           break;
1278         case OPTION_DISCARD_NONE:
1279           link_info.discard = discard_none;
1280           break;
1281         case 'X':
1282           link_info.discard = discard_l;
1283           break;
1284         case 'x':
1285           link_info.discard = discard_all;
1286           break;
1287         case 'Y':
1288           if (strncmp (optarg, "P,", 2) == 0)
1289             optarg += 2;
1290           if (default_dirlist != NULL)
1291             free (default_dirlist);
1292           default_dirlist = xstrdup (optarg);
1293           break;
1294         case 'y':
1295           add_ysym (optarg);
1296           break;
1297         case OPTION_SPARE_DYNAMIC_TAGS:
1298           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1299           break;
1300         case OPTION_SPLIT_BY_RELOC:
1301           if (optarg != NULL)
1302             config.split_by_reloc = strtoul (optarg, NULL, 0);
1303           else
1304             config.split_by_reloc = 32768;
1305           break;
1306         case OPTION_SPLIT_BY_FILE:
1307           if (optarg != NULL)
1308             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1309           else
1310             config.split_by_file = 1;
1311           break;
1312         case OPTION_CHECK_SECTIONS:
1313           command_line.check_section_addresses = TRUE;
1314           break;
1315         case OPTION_NO_CHECK_SECTIONS:
1316           command_line.check_section_addresses = FALSE;
1317           break;
1318         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1319           command_line.accept_unknown_input_arch = TRUE;
1320           break;
1321         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1322           command_line.accept_unknown_input_arch = FALSE;
1323           break;
1324         case '(':
1325           if (ingroup)
1326             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1327
1328           lang_enter_group ();
1329           ingroup = 1;
1330           break;
1331         case ')':
1332           if (! ingroup)
1333             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1334
1335           lang_leave_group ();
1336           ingroup = 0;
1337           break;
1338
1339         case OPTION_INIT:
1340           link_info.init_function = optarg;
1341           break;
1342
1343         case OPTION_FINI:
1344           link_info.fini_function = optarg;
1345           break;
1346
1347         case OPTION_REDUCE_MEMORY_OVERHEADS:
1348           command_line.reduce_memory_overheads = TRUE;
1349           if (config.hash_table_size == 0)
1350             config.hash_table_size = 1021;
1351           break;
1352
1353         case OPTION_HASH_SIZE:
1354           {
1355             bfd_size_type new_size;
1356
1357             new_size = strtoul (optarg, NULL, 0);
1358             if (new_size)
1359               config.hash_table_size = new_size;
1360             else
1361               einfo (_("%P%X: --hash-size needs a numeric argument\n"));
1362           }
1363           break;
1364         }
1365     }
1366
1367   if (ingroup)
1368     lang_leave_group ();
1369
1370   if (default_dirlist != NULL)
1371     {
1372       set_default_dirlist (default_dirlist);
1373       free (default_dirlist);
1374     }
1375
1376   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1377     /* FIXME: Should we allow emulations a chance to set this ?  */
1378     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1379
1380   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1381     /* FIXME: Should we allow emulations a chance to set this ?  */
1382     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1383 }
1384
1385 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1386    library search path.  */
1387
1388 static void
1389 set_default_dirlist (char *dirlist_ptr)
1390 {
1391   char *p;
1392
1393   while (1)
1394     {
1395       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1396       if (p != NULL)
1397         *p = '\0';
1398       if (*dirlist_ptr != '\0')
1399         ldfile_add_library_path (dirlist_ptr, TRUE);
1400       if (p == NULL)
1401         break;
1402       dirlist_ptr = p + 1;
1403     }
1404 }
1405
1406 static void
1407 set_section_start (char *sect, char *valstr)
1408 {
1409   const char *end;
1410   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1411   if (*end)
1412     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1413   lang_section_start (sect, exp_intop (val), NULL);
1414 }
1415
1416 static void
1417 set_segment_start (const char *section, char *valstr)
1418 {
1419   const char *name;
1420   const char *end;
1421   segment_type *seg;
1422
1423   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1424   if (*end)
1425     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1426   /* If we already have an entry for this segment, update the existing
1427      value.  */
1428   name = section + 1;
1429   for (seg = segments; seg; seg = seg->next)
1430     if (strcmp (seg->name, name) == 0)
1431       {
1432         seg->value = val;
1433         return;
1434       }
1435   /* There was no existing value so we must create a new segment
1436      entry.  */
1437   seg = stat_alloc (sizeof (*seg));
1438   seg->name = name;
1439   seg->value = val;
1440   seg->used = FALSE;
1441   /* Add it to the linked list of segments.  */
1442   seg->next = segments;
1443   segments = seg;
1444   /* Historically, -Ttext and friends set the base address of a
1445      particular section.  For backwards compatibility, we still do
1446      that.  If a SEGMENT_START directive is seen, the section address
1447      assignment will be disabled.  */
1448   lang_section_start (section, exp_intop (val), seg);
1449 }
1450
1451 \f
1452 /* Print help messages for the options.  */
1453
1454 static void
1455 help (void)
1456 {
1457   unsigned i;
1458   const char **targets, **pp;
1459   int len;
1460
1461   printf (_("Usage: %s [options] file...\n"), program_name);
1462
1463   printf (_("Options:\n"));
1464   for (i = 0; i < OPTION_COUNT; i++)
1465     {
1466       if (ld_options[i].doc != NULL)
1467         {
1468           bfd_boolean comma;
1469           unsigned j;
1470
1471           printf ("  ");
1472
1473           comma = FALSE;
1474           len = 2;
1475
1476           j = i;
1477           do
1478             {
1479               if (ld_options[j].shortopt != '\0'
1480                   && ld_options[j].control != NO_HELP)
1481                 {
1482                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1483                   len += (comma ? 2 : 0) + 2;
1484                   if (ld_options[j].arg != NULL)
1485                     {
1486                       if (ld_options[j].opt.has_arg != optional_argument)
1487                         {
1488                           printf (" ");
1489                           ++len;
1490                         }
1491                       printf ("%s", _(ld_options[j].arg));
1492                       len += 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           j = i;
1501           do
1502             {
1503               if (ld_options[j].opt.name != NULL
1504                   && ld_options[j].control != NO_HELP)
1505                 {
1506                   int two_dashes =
1507                     (ld_options[j].control == TWO_DASHES
1508                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1509
1510                   printf ("%s-%s%s",
1511                           comma ? ", " : "",
1512                           two_dashes ? "-" : "",
1513                           ld_options[j].opt.name);
1514                   len += ((comma ? 2 : 0)
1515                           + 1
1516                           + (two_dashes ? 1 : 0)
1517                           + strlen (ld_options[j].opt.name));
1518                   if (ld_options[j].arg != NULL)
1519                     {
1520                       printf (" %s", _(ld_options[j].arg));
1521                       len += 1 + strlen (_(ld_options[j].arg));
1522                     }
1523                   comma = TRUE;
1524                 }
1525               ++j;
1526             }
1527           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1528
1529           if (len >= 30)
1530             {
1531               printf ("\n");
1532               len = 0;
1533             }
1534
1535           for (; len < 30; len++)
1536             putchar (' ');
1537
1538           printf ("%s\n", _(ld_options[i].doc));
1539         }
1540     }
1541   printf (_("  @FILE"));
1542   for (len = strlen ("  @FILE"); len < 30; len++)
1543     putchar (' ');
1544   printf (_("Read options from FILE\n"));
1545
1546   /* Note: Various tools (such as libtool) depend upon the
1547      format of the listings below - do not change them.  */
1548   /* xgettext:c-format */
1549   printf (_("%s: supported targets:"), program_name);
1550   targets = bfd_target_list ();
1551   for (pp = targets; *pp != NULL; pp++)
1552     printf (" %s", *pp);
1553   free (targets);
1554   printf ("\n");
1555
1556   /* xgettext:c-format */
1557   printf (_("%s: supported emulations: "), program_name);
1558   ldemul_list_emulations (stdout);
1559   printf ("\n");
1560
1561   /* xgettext:c-format */
1562   printf (_("%s: emulation specific options:\n"), program_name);
1563   ldemul_list_emulation_options (stdout);
1564   printf ("\n");
1565
1566   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1567 }