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