ld/lexsup.c

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