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
   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_WRAP,
 116   OPTION_FORCE_EXE_SUFFIX,
 117   OPTION_GC_SECTIONS,
 118   OPTION_NO_GC_SECTIONS,
 119   OPTION_CHECK_SECTIONS,
 120   OPTION_NO_CHECK_SECTIONS,
 121   OPTION_MPC860C0,
 122   OPTION_NO_UNDEFINED,
 123   OPTION_INIT,
 124   OPTION_FINI,
 125   OPTION_SECTION_START,
 126   OPTION_UNIQUE,
 127   OPTION_TARGET_HELP,
 128   OPTION_ALLOW_SHLIB_UNDEFINED,
 129   OPTION_NO_ALLOW_SHLIB_UNDEFINED,
 130   OPTION_ALLOW_MULTIPLE_DEFINITION,
 131   OPTION_NO_UNDEFINED_VERSION,
 132   OPTION_DISCARD_NONE,
 133   OPTION_SPARE_DYNAMIC_TAGS,
 134   OPTION_NO_DEFINE_COMMON,
 135   OPTION_NOSTDLIB,
 136   OPTION_NO_OMAGIC,
 137   OPTION_STRIP_DISCARDED,
 138   OPTION_NO_STRIP_DISCARDED,
 139   OPTION_ACCEPT_UNKNOWN_INPUT_ARCH,
 140   OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH,
 141   OPTION_PIE,
 142   OPTION_UNRESOLVED_SYMBOLS,
 143   OPTION_WARN_UNRESOLVED_SYMBOLS,
 144   OPTION_ERROR_UNRESOLVED_SYMBOLS
 145 };
 146
 147 /* The long options.  This structure is used for both the option
 148    parsing and the help text.  */
 149
 150 struct ld_option
 151 {
 152   /* The long option information.  */
 153   struct option opt;
 154   /* The short option with the same meaning ('\0' if none).  */
 155   char shortopt;
 156   /* The name of the argument (NULL if none).  */
 157   const char *arg;
 158   /* The documentation string.  If this is NULL, this is a synonym for
 159      the previous option.  */
 160   const char *doc;
 161   enum {
 162     /* Use one dash before long option name.  */
 163     ONE_DASH,
 164     /* Use two dashes before long option name.  */
 165     TWO_DASHES,
 166     /* Only accept two dashes before the long option name.
 167        This is an overloading of the use of this enum, since originally it
 168        was only intended to tell the --help display function how to display
 169        the long option name.  This feature was added in order to resolve
 170        the confusion about the -omagic command line switch.  Is it setting
 171        the output file name to "magic" or is it setting the NMAGIC flag on
 172        the output ?  It has been decided that it is setting the output file
 173        name, and that if you want to set the NMAGIC flag you should use -N
 174        or --omagic.  */
 175     EXACTLY_TWO_DASHES,
 176     /* Don't mention this option in --help output.  */
 177     NO_HELP
 178   } control;
 179 };
 180
 181 static const struct ld_option ld_options[] =
 182 {
 183   { {NULL, required_argument, NULL, '\0'},
 184       'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
 185       ONE_DASH },
 186   { {"architecture", required_argument, NULL, 'A'},
 187       'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
 188   { {"format", required_argument, NULL, 'b'},
 189       'b', N_("TARGET"), N_("Specify target for following input files"), TWO_DASHES },
 190   { {"mri-script", required_argument, NULL, 'c'},
 191       'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
 192   { {"dc", no_argument, NULL, 'd'},
 193       'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
 194   { {"dp", no_argument, NULL, 'd'},
 195       '\0', NULL, NULL, ONE_DASH },
 196   { {"entry", required_argument, NULL, 'e'},
 197       'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
 198   { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
 199       'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
 200   { {"EB", no_argument, NULL, OPTION_EB},
 201       '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
 202   { {"EL", no_argument, NULL, OPTION_EL},
 203       '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
 204   { {"auxiliary", required_argument, NULL, 'f'},
 205       'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
 206       TWO_DASHES },
 207   { {"filter", required_argument, NULL, 'F'},
 208       'F', N_("SHLIB"), N_("Filter for shared object symbol table"), TWO_DASHES },
 209   { {NULL, no_argument, NULL, '\0'},
 210       'g', NULL, N_("Ignored"), ONE_DASH },
 211   { {"gpsize", required_argument, NULL, 'G'},
 212       'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
 213       TWO_DASHES },
 214   { {"soname", required_argument, NULL, OPTION_SONAME},
 215       'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
 216   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
 217       'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"), TWO_DASHES },
 218   { {"library", required_argument, NULL, 'l'},
 219       'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
 220   { {"library-path", required_argument, NULL, 'L'},
 221       'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"), TWO_DASHES },
 222   { {NULL, required_argument, NULL, '\0'},
 223       'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
 224   { {"print-map", no_argument, NULL, 'M'},
 225       'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
 226   { {"nmagic", no_argument, NULL, 'n'},
 227       'n', NULL, N_("Do not page align data"), TWO_DASHES },
 228   { {"omagic", no_argument, NULL, 'N'},
 229       'N', NULL, N_("Do not page align data, do not make text readonly"),
 230       EXACTLY_TWO_DASHES },
 231   { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
 232       '\0', NULL, N_("Page align data, make text readonly"), EXACTLY_TWO_DASHES },
 233   { {"output", required_argument, NULL, 'o'},
 234       'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
 235   { {NULL, required_argument, NULL, '\0'},
 236       'O', NULL, N_("Optimize output file"), ONE_DASH },
 237   { {"Qy", no_argument, NULL, OPTION_IGNORE},
 238       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
 239   { {"emit-relocs", no_argument, NULL, 'q'},
 240       'q', NULL, "Generate relocations in final output", TWO_DASHES },
 241   { {"relocatable", no_argument, NULL, 'r'},
 242       'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
 243   { {NULL, no_argument, NULL, '\0'},
 244       'i', NULL, NULL, ONE_DASH },
 245   { {"just-symbols", required_argument, NULL, 'R'},
 246       'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
 247       TWO_DASHES },
 248   { {"strip-all", no_argument, NULL, 's'},
 249       's', NULL, N_("Strip all symbols"), TWO_DASHES },
 250   { {"strip-debug", no_argument, NULL, 'S'},
 251       'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
 252   { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
 253       '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
 254   { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
 255       '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
 256   { {"trace", no_argument, NULL, 't'},
 257       't', NULL, N_("Trace file opens"), TWO_DASHES },
 258   { {"script", required_argument, NULL, 'T'},
 259       'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
 260   { {"undefined", required_argument, NULL, 'u'},
 261       'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES },
 262   { {"unique", optional_argument, NULL, OPTION_UNIQUE},
 263       '\0', N_("[=SECTION]"), N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
 264   { {"Ur", no_argument, NULL, OPTION_UR},
 265       '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
 266   { {"version", no_argument, NULL, OPTION_VERSION},
 267       'v', NULL, N_("Print version information"), TWO_DASHES },
 268   { {NULL, no_argument, NULL, '\0'},
 269       'V', NULL, N_("Print version and emulation information"), ONE_DASH },
 270   { {"discard-all", no_argument, NULL, 'x'},
 271       'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
 272   { {"discard-locals", no_argument, NULL, 'X'},
 273       'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
 274   { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
 275       '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
 276   { {"trace-symbol", required_argument, NULL, 'y'},
 277       'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
 278   { {NULL, required_argument, NULL, '\0'},
 279       'Y', N_("PATH"), N_("Default search path for Solaris compatibility"), ONE_DASH },
 280   { {"start-group", no_argument, NULL, '('},
 281       '(', NULL, N_("Start a group"), TWO_DASHES },
 282   { {"end-group", no_argument, NULL, ')'},
 283       ')', NULL, N_("End a group"), TWO_DASHES },
 284   { {"accept-unknown-input-arch", no_argument, NULL, OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
 285     '\0', NULL, N_("Accept input files whose architecture cannot be determined"), TWO_DASHES },
 286   { {"no-accept-unknown-input-arch", no_argument, NULL, OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
 287     '\0', NULL, N_("Reject input files whose architecture is unknown"), TWO_DASHES },
 288   { {"assert", required_argument, NULL, OPTION_ASSERT},
 289       '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
 290   { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
 291       '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
 292   { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
 293       '\0', NULL, NULL, ONE_DASH },
 294   { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
 295       '\0', NULL, NULL, ONE_DASH },
 296   { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
 297       '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
 298   { {"dn", no_argument, NULL, OPTION_NON_SHARED},
 299       '\0', NULL, NULL, ONE_DASH },
 300   { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
 301       '\0', NULL, NULL, ONE_DASH },
 302   { {"static", no_argument, NULL, OPTION_NON_SHARED},
 303       '\0', NULL, NULL, ONE_DASH },
 304   { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
 305       '\0', NULL, N_("Bind global references locally"), ONE_DASH },
 306   { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
 307       '\0', NULL, N_("Check section addresses for overlaps (default)"), TWO_DASHES },
 308   { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
 309       '\0', NULL, N_("Do not check section addresses for overlaps"),
 310       TWO_DASHES },
 311   { {"cref", no_argument, NULL, OPTION_CREF},
 312       '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
 313   { {"defsym", required_argument, NULL, OPTION_DEFSYM},
 314       '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
 315   { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
 316       '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"), TWO_DASHES },
 317   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
 318       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
 319   { {"fini", required_argument, NULL, OPTION_FINI},
 320      '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
 321   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
 322       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
 323   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
 324       '\0', NULL, N_("Remove unused sections (on some targets)"),
 325       TWO_DASHES },
 326   { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
 327       '\0', NULL, N_("Don't remove unused sections (default)"),
 328       TWO_DASHES },
 329   { {"help", no_argument, NULL, OPTION_HELP},
 330       '\0', NULL, N_("Print option help"), TWO_DASHES },
 331   { {"init", required_argument, NULL, OPTION_INIT},
 332      '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
 333   { {"Map", required_argument, NULL, OPTION_MAP},
 334       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
 335   { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
 336       '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
 337   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
 338       '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
 339   { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
 340       '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
 341   { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
 342      '\0', NULL, N_("Do not allow unresolved references in object files"), TWO_DASHES },
 343   { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
 344      '\0', NULL, N_("Allow unresolved references in shared libaries"), TWO_DASHES },
 345   { {"no-allow-shlib-undefined", no_argument, NULL, OPTION_NO_ALLOW_SHLIB_UNDEFINED},
 346      '\0', NULL, N_("Do not allow unresolved references in shared libs"), TWO_DASHES },
 347   { {"allow-multiple-definition", no_argument, NULL, OPTION_ALLOW_MULTIPLE_DEFINITION},
 348      '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
 349   { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
 350      '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
 351   { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
 352       '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
 353   { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
 354       '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
 355   { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 356       '\0', NULL, N_("Create an output file even if errors occur"), TWO_DASHES },
 357   { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
 358       '\0', NULL, NULL, NO_HELP },
 359   { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
 360       '\0', NULL, N_("Only use library directories specified on\n\t\t\t\tthe command line"), ONE_DASH },
 361   { {"oformat", required_argument, NULL, OPTION_OFORMAT},
 362       '\0', N_("TARGET"), N_("Specify target of output file"), EXACTLY_TWO_DASHES },
 363   { {"qmagic", no_argument, NULL, OPTION_IGNORE},
 364       '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
 365   { {"relax", no_argument, NULL, OPTION_RELAX},
 366       '\0', NULL, N_("Relax branches on certain targets"), TWO_DASHES },
 367   { {"retain-symbols-file", required_argument, NULL,
 368        OPTION_RETAIN_SYMBOLS_FILE},
 369       '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
 370   { {"rpath", required_argument, NULL, OPTION_RPATH},
 371       '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
 372   { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
 373       '\0', N_("PATH"), N_("Set link time shared library search path"), ONE_DASH },
 374   { {"shared", no_argument, NULL, OPTION_SHARED},
 375       '\0', NULL, N_("Create a shared library"), ONE_DASH },
 376   { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
 377       '\0', NULL, NULL, ONE_DASH },
 378   { {"pie", no_argument, NULL, OPTION_PIE},
 379       '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
 380   { {"pic-executable", no_argument, NULL, OPTION_PIE},
 381       '\0', NULL, NULL, TWO_DASHES },
 382   { {"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
 383       '\0', NULL, N_("Sort common symbols by size"), TWO_DASHES },
 384   { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
 385       '\0', NULL, NULL, NO_HELP },
 386   { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
 387       '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"), TWO_DASHES },
 388   { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
 389       '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"), TWO_DASHES },
 390   { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
 391       '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"), TWO_DASHES },
 392   { {"stats", no_argument, NULL, OPTION_STATS},
 393       '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
 394   { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
 395       '\0', NULL, N_("Display target specific options"), TWO_DASHES },
 396   { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
 397       '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
 398   { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
 399       '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
 400   { {"section-start", required_argument, NULL, OPTION_SECTION_START},
 401       '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"), TWO_DASHES },
 402   { {"Tbss", required_argument, NULL, OPTION_TBSS},
 403       '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
 404   { {"Tdata", required_argument, NULL, OPTION_TDATA},
 405       '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
 406   { {"Ttext", required_argument, NULL, OPTION_TTEXT},
 407       '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
 408   { {"unresolved-symbols=<method>", required_argument, NULL, OPTION_UNRESOLVED_SYMBOLS},
 409      '\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"),
 410     TWO_DASHES },
 411   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 412       '\0', NULL, N_("Output lots of information during link"), TWO_DASHES },
 413   { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
 414       '\0', NULL, NULL, NO_HELP },
 415   { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
 416       '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
 417   { {"version-exports-section", required_argument, NULL,
 418      OPTION_VERSION_EXPORTS_SECTION },
 419     '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n\t\t\t\tSYMBOL as the version."),
 420     TWO_DASHES },
 421   { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
 422       '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
 423   { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
 424       '\0', NULL, N_("Warn if global constructors/destructors are seen"),
 425       TWO_DASHES },
 426   { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
 427       '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
 428   { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
 429       '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
 430   { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
 431       '\0', NULL, N_("Warn if start of section changes due to alignment"),
 432       TWO_DASHES },
 433   { {"warn-unresolved-symbols", no_argument, NULL, OPTION_WARN_UNRESOLVED_SYMBOLS},
 434     '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
 435   { {"error-unresolved-symbols", no_argument, NULL, OPTION_ERROR_UNRESOLVED_SYMBOLS},
 436     '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
 437   { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
 438      '\0', NULL, N_("Treat warnings as errors"),
 439      TWO_DASHES },
 440   { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
 441       '\0', NULL, N_("Include all objects from following archives"), TWO_DASHES },
 442   { {"wrap", required_argument, NULL, OPTION_WRAP},
 443       '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
 444   { {"mpc860c0", optional_argument, NULL, OPTION_MPC860C0},
 445       '\0', N_("[=WORDS]"), N_("Modify problematic branches in last WORDS (1-10,\n\t\t\t\tdefault 5) words of a page"), TWO_DASHES }
 446 };
 447
 448 #define OPTION_COUNT ARRAY_SIZE (ld_options)
 449
 450 /* Test STRING for containing a string of digits that form a number
 451    between MIN and MAX.  The return value is the number or ERR.  */
 452
 453 static int
 454 is_num (const char *string, int min, int max, int err)
 455 {
 456   int result = 0;
 457
 458   for (; *string; ++string)
 459     {
 460       if (! ISDIGIT (*string))
 461         {
 462           result = err;
 463           break;
 464         }
 465       result = result * 10 + (*string - '0');
 466     }
 467   if (result < min || result > max)
 468     result = err;
 469
 470   return result;
 471 }
 472
 473 void
 474 parse_args (unsigned argc, char **argv)
 475 {
 476   unsigned i;
 477   int is, il, irl;
 478   int ingroup = 0;
 479   char *default_dirlist = NULL;
 480   char *shortopts;
 481   struct option *longopts;
 482   struct option *really_longopts;
 483   int last_optind;
 484   enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 485
 486   shortopts = xmalloc (OPTION_COUNT * 3 + 2);
 487   longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
 488   really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));
 489
 490   /* Starting the short option string with '-' is for programs that
 491      expect options and other ARGV-elements in any order and that care about
 492      the ordering of the two.  We describe each non-option ARGV-element
 493      as if it were the argument of an option with character code 1.  */
 494   shortopts[0] = '-';
 495   is = 1;
 496   il = 0;
 497   irl = 0;
 498   for (i = 0; i < OPTION_COUNT; i++)
 499     {
 500       if (ld_options[i].shortopt != '\0')
 501         {
 502           shortopts[is] = ld_options[i].shortopt;
 503           ++is;
 504           if (ld_options[i].opt.has_arg == required_argument
 505               || ld_options[i].opt.has_arg == optional_argument)
 506             {
 507               shortopts[is] = ':';
 508               ++is;
 509               if (ld_options[i].opt.has_arg == optional_argument)
 510                 {
 511                   shortopts[is] = ':';
 512                   ++is;
 513                 }
 514             }
 515         }
 516       if (ld_options[i].opt.name != NULL)
 517         {
 518           if (ld_options[i].control == EXACTLY_TWO_DASHES)
 519             {
 520               really_longopts[irl] = ld_options[i].opt;
 521               ++irl;
 522             }
 523           else
 524             {
 525               longopts[il] = ld_options[i].opt;
 526               ++il;
 527             }
 528         }
 529     }
 530   shortopts[is] = '\0';
 531   longopts[il].name = NULL;
 532   really_longopts[irl].name = NULL;
 533
 534   ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);
 535
 536   /* The -G option is ambiguous on different platforms.  Sometimes it
 537      specifies the largest data size to put into the small data
 538      section.  Sometimes it is equivalent to --shared.  Unfortunately,
 539      the first form takes an argument, while the second does not.
 540
 541      We need to permit the --shared form because on some platforms,
 542      such as Solaris, gcc -shared will pass -G to the linker.
 543
 544      To permit either usage, we look through the argument list.  If we
 545      find -G not followed by a number, we change it into --shared.
 546      This will work for most normal cases.  */
 547   for (i = 1; i < argc; i++)
 548     if (strcmp (argv[i], "-G") == 0
 549         && (i + 1 >= argc
 550             || ! ISDIGIT (argv[i + 1][0])))
 551       argv[i] = (char *) "--shared";
 552
 553   /* Because we permit long options to start with a single dash, and
 554      we have a --library option, and the -l option is conventionally
 555      used with an immediately following argument, we can have bad
 556      results if somebody tries to use -l with a library whose name
 557      happens to start with "ibrary", as in -li.  We avoid problems by
 558      simply turning -l into --library.  This means that users will
 559      have to use two dashes in order to use --library, which is OK
 560      since that's how it is documented.
 561
 562      FIXME: It's possible that this problem can arise for other short
 563      options as well, although the user does always have the recourse
 564      of adding a space between the option and the argument.  */
 565   for (i = 1; i < argc; i++)
 566     {
 567       if (argv[i][0] == '-'
 568           && argv[i][1] == 'l'
 569           && argv[i][2] != '\0')
 570         {
 571           char *n;
 572
 573           n = xmalloc (strlen (argv[i]) + 20);
 574           sprintf (n, "--library=%s", argv[i] + 2);
 575           argv[i] = n;
 576         }
 577     }
 578
 579   last_optind = -1;
 580   while (1)
 581     {
 582       int longind;
 583       int optc;
 584
 585       /* Using last_optind lets us avoid calling ldemul_parse_args
 586          multiple times on a single option, which would lead to
 587          confusion in the internal static variables maintained by
 588          getopt.  This could otherwise happen for an argument like
 589          -nx, in which the -n is parsed as a single option, and we
 590          loop around to pick up the -x.  */
 591       if (optind != last_optind)
 592         if (ldemul_parse_args (argc, argv))
 593           continue;
 594
 595       /* getopt_long_only is like getopt_long, but '-' as well as '--'
 596          can indicate a long option.  */
 597       opterr = 0;
 598       last_optind = optind;
 599       optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
 600       if (optc == '?')
 601         {
 602           optind = last_optind;
 603           optc = getopt_long (argc, argv, "-", really_longopts, &longind);
 604         }
 605
 606       if (ldemul_handle_option (optc))
 607         continue;
 608
 609       if (optc == -1)
 610         break;
 611
 612       switch (optc)
 613         {
 614         case '?':
 615           einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
 616         default:
 617           einfo (_("%P%F: use the --help option for usage information\n"));
 618
 619         case 1:                 /* File name.  */
 620           lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
 621           break;
 622
 623         case OPTION_IGNORE:
 624           break;
 625         case 'a':
 626           /* For HP/UX compatibility.  Actually -a shared should mean
 627              ``use only shared libraries'' but, then, we don't
 628              currently support shared libraries on HP/UX anyhow.  */
 629           if (strcmp (optarg, "archive") == 0)
 630             config.dynamic_link = FALSE;
 631           else if (strcmp (optarg, "shared") == 0
 632                    || strcmp (optarg, "default") == 0)
 633             config.dynamic_link = TRUE;
 634           else
 635             einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
 636           break;
 637         case OPTION_ASSERT:
 638           /* FIXME: We just ignore these, but we should handle them.  */
 639           if (strcmp (optarg, "definitions") == 0)
 640             ;
 641           else if (strcmp (optarg, "nodefinitions") == 0)
 642             ;
 643           else if (strcmp (optarg, "nosymbolic") == 0)
 644             ;
 645           else if (strcmp (optarg, "pure-text") == 0)
 646             ;
 647           else
 648             einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
 649           break;
 650         case 'A':
 651           ldfile_add_arch (optarg);
 652           break;
 653         case 'b':
 654           lang_add_target (optarg);
 655           break;
 656         case 'c':
 657           ldfile_open_command_file (optarg);
 658           parser_input = input_mri_script;
 659           yyparse ();
 660           break;
 661         case OPTION_CALL_SHARED:
 662           config.dynamic_link = TRUE;
 663           /* When linking against shared libraries, the default
 664              behaviour is to ignore any unresolved references.  */
 665           if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
 666             link_info.unresolved_syms_in_objects = RM_IGNORE;
 667           if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
 668             link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 669           break;
 670         case OPTION_NON_SHARED:
 671           config.dynamic_link = FALSE;
 672           /* When linking against static libraries, the default
 673              behaviour is to report any unresolved references.  */
 674           if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
 675             link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 676           if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
 677             link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 678           break;
 679         case OPTION_CREF:
 680           command_line.cref = TRUE;
 681           link_info.notice_all = TRUE;
 682           break;
 683         case 'd':
 684           command_line.force_common_definition = TRUE;
 685           break;
 686         case OPTION_DEFSYM:
 687           lex_string = optarg;
 688           lex_redirect (optarg);
 689           parser_input = input_defsym;
 690           parsing_defsym = 1;
 691           yyparse ();
 692           parsing_defsym = 0;
 693           lex_string = NULL;
 694           break;
 695         case OPTION_DEMANGLE:
 696           demangling = TRUE;
 697           if (optarg != NULL)
 698             {
 699               enum demangling_styles style;
 700
 701               style = cplus_demangle_name_to_style (optarg);
 702               if (style == unknown_demangling)
 703                 einfo (_("%F%P: unknown demangling style `%s'"),
 704                        optarg);
 705
 706               cplus_demangle_set_style (style);
 707             }
 708           break;
 709         case 'I':               /* Used on Solaris.  */
 710         case OPTION_DYNAMIC_LINKER:
 711           command_line.interpreter = optarg;
 712           break;
 713         case OPTION_EB:
 714           command_line.endian = ENDIAN_BIG;
 715           break;
 716         case OPTION_EL:
 717           command_line.endian = ENDIAN_LITTLE;
 718           break;
 719         case OPTION_EMBEDDED_RELOCS:
 720           command_line.embedded_relocs = TRUE;
 721           break;
 722         case OPTION_EXPORT_DYNAMIC:
 723         case 'E': /* HP/UX compatibility.  */
 724           link_info.export_dynamic = TRUE;
 725           break;
 726         case 'e':
 727           lang_add_entry (optarg, TRUE);
 728           break;
 729         case 'f':
 730           if (command_line.auxiliary_filters == NULL)
 731             {
 732               command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
 733               command_line.auxiliary_filters[0] = optarg;
 734               command_line.auxiliary_filters[1] = NULL;
 735             }
 736           else
 737             {
 738               int c;
 739               char **p;
 740
 741               c = 0;
 742               for (p = command_line.auxiliary_filters; *p != NULL; p++)
 743                 ++c;
 744               command_line.auxiliary_filters
 745                 = xrealloc (command_line.auxiliary_filters,
 746                             (c + 2) * sizeof (char *));
 747               command_line.auxiliary_filters[c] = optarg;
 748               command_line.auxiliary_filters[c + 1] = NULL;
 749             }
 750           break;
 751         case 'F':
 752           command_line.filter_shlib = optarg;
 753           break;
 754         case OPTION_FORCE_EXE_SUFFIX:
 755           command_line.force_exe_suffix = TRUE;
 756           break;
 757         case 'G':
 758           {
 759             char *end;
 760             g_switch_value = strtoul (optarg, &end, 0);
 761             if (*end)
 762               einfo (_("%P%F: invalid number `%s'\n"), optarg);
 763           }
 764           break;
 765         case 'g':
 766           /* Ignore.  */
 767           break;
 768         case OPTION_GC_SECTIONS:
 769           command_line.gc_sections = TRUE;
 770           break;
 771         case OPTION_HELP:
 772           help ();
 773           xexit (0);
 774           break;
 775         case 'L':
 776           ldfile_add_library_path (optarg, TRUE);
 777           break;
 778         case 'l':
 779           lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
 780           break;
 781         case 'M':
 782           config.map_filename = "-";
 783           break;
 784         case 'm':
 785           /* Ignore.  Was handled in a pre-parse.   */
 786           break;
 787         case OPTION_MAP:
 788           config.map_filename = optarg;
 789           break;
 790         case 'N':
 791           config.text_read_only = FALSE;
 792           config.magic_demand_paged = FALSE;
 793           config.dynamic_link = FALSE;
 794           break;
 795         case OPTION_NO_OMAGIC:
 796           config.text_read_only = TRUE;
 797           config.magic_demand_paged = TRUE;
 798           /* NB/ Does not set dynamic_link to TRUE.
 799              Use --call-shared or -Bdynamic for this.  */
 800           break;
 801         case 'n':
 802           config.magic_demand_paged = FALSE;
 803           config.dynamic_link = FALSE;
 804           break;
 805         case OPTION_NO_DEFINE_COMMON:
 806           command_line.inhibit_common_definition = TRUE;
 807           break;
 808         case OPTION_NO_DEMANGLE:
 809           demangling = FALSE;
 810           break;
 811         case OPTION_NO_GC_SECTIONS:
 812           command_line.gc_sections = FALSE;
 813           break;
 814         case OPTION_NO_KEEP_MEMORY:
 815           link_info.keep_memory = FALSE;
 816           break;
 817         case OPTION_NO_UNDEFINED:
 818           link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 819           break;
 820         case OPTION_ALLOW_SHLIB_UNDEFINED:
 821           link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 822           break;
 823         case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
 824           link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 825           break;
 826         case OPTION_UNRESOLVED_SYMBOLS:
 827           if (strcmp (optarg, "ignore-all") == 0)
 828             {
 829               link_info.unresolved_syms_in_objects = RM_IGNORE;
 830               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 831             }
 832           else if (strcmp (optarg, "report-all") == 0)
 833             {
 834               link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 835               link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 836             }
 837           else if (strcmp (optarg, "ignore-in-object-files") == 0)
 838             {
 839               link_info.unresolved_syms_in_objects = RM_IGNORE;
 840               link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
 841             }
 842           else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
 843             {
 844               link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
 845               link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
 846             }
 847           else
 848             einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
 849           break;
 850         case OPTION_WARN_UNRESOLVED_SYMBOLS:
 851           how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
 852           if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
 853             link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
 854           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
 855             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
 856           break;
 857
 858         case OPTION_ERROR_UNRESOLVED_SYMBOLS:
 859           how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
 860           if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
 861             link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
 862           if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
 863             link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
 864           break;
 865         case OPTION_ALLOW_MULTIPLE_DEFINITION:
 866           link_info.allow_multiple_definition = TRUE;
 867           break;
 868         case OPTION_NO_UNDEFINED_VERSION:
 869           link_info.allow_undefined_version = FALSE;
 870           break;
 871         case OPTION_NO_WARN_MISMATCH:
 872           command_line.warn_mismatch = FALSE;
 873           break;
 874         case OPTION_NOINHIBIT_EXEC:
 875           force_make_executable = TRUE;
 876           break;
 877         case OPTION_NOSTDLIB:
 878           config.only_cmd_line_lib_dirs = TRUE;
 879           break;
 880         case OPTION_NO_WHOLE_ARCHIVE:
 881           whole_archive = FALSE;
 882           break;
 883         case 'O':
 884           /* FIXME "-O<non-digits> <value>" used to set the address of
 885              section <non-digits>.  Was this for compatibility with
 886              something, or can we create a new option to do that
 887              (with a syntax similar to -defsym)?
 888              getopt can't handle two args to an option without kludges.  */
 889
 890           /* Enable optimizations of output files.  */
 891           link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
 892           break;
 893         case 'o':
 894           lang_add_output (optarg, 0);
 895           break;
 896         case OPTION_OFORMAT:
 897           lang_add_output_format (optarg, NULL, NULL, 0);
 898           break;
 899         case 'q':
 900           link_info.emitrelocations = TRUE;
 901           break;
 902         case 'i':
 903         case 'r':
 904           if (optind == last_optind)
 905             /* This can happen if the user put "-rpath,a" on the command
 906                line.  (Or something similar.  The comma is important).
 907                Getopt becomes confused and thinks that this is a -r option
 908                but it cannot parse the text after the -r so it refuses to
 909                increment the optind counter.  Detect this case and issue
 910                an error message here.  We cannot just make this a warning,
 911                increment optind, and continue because getopt is too confused
 912                and will seg-fault the next time around.  */
 913             einfo(_("%P%F: bad -rpath option\n"));
 914
 915           link_info.relocatable = TRUE;
 916           config.build_constructors = FALSE;
 917           config.magic_demand_paged = FALSE;
 918           config.text_read_only = FALSE;
 919           config.dynamic_link = FALSE;
 920           break;
 921         case 'R':
 922           /* The GNU linker traditionally uses -R to mean to include
 923              only the symbols from a file.  The Solaris linker uses -R
 924              to set the path used by the runtime linker to find
 925              libraries.  This is the GNU linker -rpath argument.  We
 926              try to support both simultaneously by checking the file
 927              named.  If it is a directory, rather than a regular file,
 928              we assume -rpath was meant.  */
 929           {
 930             struct stat s;
 931
 932             if (stat (optarg, &s) >= 0
 933                 && ! S_ISDIR (s.st_mode))
 934               {
 935                 lang_add_input_file (optarg,
 936                                      lang_input_file_is_symbols_only_enum,
 937                                      NULL);
 938                 break;
 939               }
 940           }
 941           /* Fall through.  */
 942         case OPTION_RPATH:
 943           if (command_line.rpath == NULL)
 944             command_line.rpath = xstrdup (optarg);
 945           else
 946             {
 947               size_t rpath_len = strlen (command_line.rpath);
 948               size_t optarg_len = strlen (optarg);
 949               char *buf;
 950               char *cp = command_line.rpath;
 951
 952               /* First see whether OPTARG is already in the path.  */
 953               do
 954                 {
 955                   size_t idx = 0;
 956
 957                   while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
 958                     ++idx;
 959                   if (optarg[idx] == '\0'
 960                       && (cp[idx] == '\0' || cp[idx] == ':'))
 961                     /* We found it.  */
 962                     break;
 963
 964                   /* Not yet found.  */
 965                   cp = strchr (cp, ':');
 966                   if (cp != NULL)
 967                     ++cp;
 968                 }
 969               while (cp != NULL);
 970
 971               if (cp == NULL)
 972                 {
 973                   buf = xmalloc (rpath_len + optarg_len + 2);
 974                   sprintf (buf, "%s:%s", command_line.rpath, optarg);
 975                   free (command_line.rpath);
 976                   command_line.rpath = buf;
 977                 }
 978             }
 979           break;
 980         case OPTION_RPATH_LINK:
 981           if (command_line.rpath_link == NULL)
 982             command_line.rpath_link = xstrdup (optarg);
 983           else
 984             {
 985               char *buf;
 986
 987               buf = xmalloc (strlen (command_line.rpath_link)
 988                              + strlen (optarg)
 989                              + 2);
 990               sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
 991               free (command_line.rpath_link);
 992               command_line.rpath_link = buf;
 993             }
 994           break;
 995         case OPTION_RELAX:
 996           command_line.relax = TRUE;
 997           break;
 998         case OPTION_RETAIN_SYMBOLS_FILE:
 999           add_keepsyms_file (optarg);
1000           break;
1001         case 'S':
1002           link_info.strip = strip_debugger;
1003           break;
1004         case 's':
1005           link_info.strip = strip_all;
1006           break;
1007         case OPTION_STRIP_DISCARDED:
1008           link_info.strip_discarded = TRUE;
1009           break;
1010         case OPTION_NO_STRIP_DISCARDED:
1011           link_info.strip_discarded = FALSE;
1012           break;
1013         case OPTION_SHARED:
1014           if (config.has_shared)
1015             {
1016               link_info.shared = TRUE;
1017               /* When creating a shared library, the default
1018                  behaviour is to ignore any unresolved references.  */
1019               if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1020                 link_info.unresolved_syms_in_objects = RM_IGNORE;
1021               if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1022                 link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
1023             }
1024           else
1025             einfo (_("%P%F: -shared not supported\n"));
1026           break;
1027         case OPTION_PIE:
1028           if (config.has_shared)
1029             {
1030               link_info.shared = TRUE;
1031               link_info.pie = TRUE;
1032             }
1033           else
1034             einfo (_("%P%F: -pie not supported\n"));
1035           break;
1036         case 'h':               /* Used on Solaris.  */
1037         case OPTION_SONAME:
1038           command_line.soname = optarg;
1039           break;
1040         case OPTION_SORT_COMMON:
1041           config.sort_common = TRUE;
1042           break;
1043         case OPTION_STATS:
1044           config.stats = TRUE;
1045           break;
1046         case OPTION_SYMBOLIC:
1047           link_info.symbolic = TRUE;
1048           break;
1049         case 't':
1050           trace_files = TRUE;
1051           break;
1052         case 'T':
1053           ldfile_open_command_file (optarg);
1054           parser_input = input_script;
1055           yyparse ();
1056           break;
1057         case OPTION_SECTION_START:
1058           {
1059             char *optarg2;
1060             char *sec_name;
1061             int len;
1062
1063             /* Check for <something>=<somthing>...  */
1064             optarg2 = strchr (optarg, '=');
1065             if (optarg2 == NULL)
1066               einfo (_("%P%F: invalid argument to option \"--section-start\"\n"));
1067
1068             optarg2++;
1069
1070             /* So far so good.  Are all the args present?  */
1071             if ((*optarg == '\0') || (*optarg2 == '\0'))
1072               einfo (_("%P%F: missing argument(s) to option \"--section-start\"\n"));
1073
1074             /* We must copy the section name as set_section_start
1075                doesn't do it for us.  */
1076             len = optarg2 - optarg;
1077             sec_name = xmalloc (len);
1078             memcpy (sec_name, optarg, len - 1);
1079             sec_name[len - 1] = 0;
1080
1081             /* Then set it...  */
1082             set_section_start (sec_name, optarg2);
1083           }
1084           break;
1085         case OPTION_TARGET_HELP:
1086           /* Mention any target specific options.  */
1087           ldemul_list_emulation_options (stdout);
1088           exit (0);
1089         case OPTION_TBSS:
1090           set_section_start (".bss", optarg);
1091           break;
1092         case OPTION_TDATA:
1093           set_section_start (".data", optarg);
1094           break;
1095         case OPTION_TTEXT:
1096           set_section_start (".text", optarg);
1097           break;
1098         case OPTION_TRADITIONAL_FORMAT:
1099           link_info.traditional_format = TRUE;
1100           break;
1101         case OPTION_TASK_LINK:
1102           link_info.task_link = TRUE;
1103           /* Fall through - do an implied -r option.  */
1104         case OPTION_UR:
1105           link_info.relocatable = TRUE;
1106           config.build_constructors = TRUE;
1107           config.magic_demand_paged = FALSE;
1108           config.text_read_only = FALSE;
1109           config.dynamic_link = FALSE;
1110           break;
1111         case 'u':
1112           ldlang_add_undef (optarg);
1113           break;
1114         case OPTION_UNIQUE:
1115           if (optarg != NULL)
1116             lang_add_unique (optarg);
1117           else
1118             config.unique_orphan_sections = TRUE;
1119           break;
1120         case OPTION_VERBOSE:
1121           ldversion (1);
1122           version_printed = TRUE;
1123           trace_file_tries = TRUE;
1124           overflow_cutoff_limit = -2;
1125           break;
1126         case 'v':
1127           ldversion (0);
1128           version_printed = TRUE;
1129           break;
1130         case 'V':
1131           ldversion (1);
1132           version_printed = TRUE;
1133           break;
1134         case OPTION_VERSION:
1135           ldversion (2);
1136           xexit (0);
1137           break;
1138         case OPTION_VERSION_SCRIPT:
1139           /* This option indicates a small script that only specifies
1140              version information.  Read it, but don't assume that
1141              we've seen a linker script.  */
1142           {
1143             FILE *hold_script_handle;
1144
1145             hold_script_handle = saved_script_handle;
1146             ldfile_open_command_file (optarg);
1147             saved_script_handle = hold_script_handle;
1148             parser_input = input_version_script;
1149             yyparse ();
1150           }
1151           break;
1152         case OPTION_VERSION_EXPORTS_SECTION:
1153           /* This option records a version symbol to be applied to the
1154              symbols listed for export to be found in the object files
1155              .exports sections.  */
1156           command_line.version_exports_section = optarg;
1157           break;
1158         case OPTION_WARN_COMMON:
1159           config.warn_common = TRUE;
1160           break;
1161         case OPTION_WARN_CONSTRUCTORS:
1162           config.warn_constructors = TRUE;
1163           break;
1164         case OPTION_WARN_FATAL:
1165           config.fatal_warnings = TRUE;
1166           break;
1167         case OPTION_WARN_MULTIPLE_GP:
1168           config.warn_multiple_gp = TRUE;
1169           break;
1170         case OPTION_WARN_ONCE:
1171           config.warn_once = TRUE;
1172           break;
1173         case OPTION_WARN_SECTION_ALIGN:
1174           config.warn_section_align = TRUE;
1175           break;
1176         case OPTION_WHOLE_ARCHIVE:
1177           whole_archive = TRUE;
1178           break;
1179         case OPTION_WRAP:
1180           add_wrap (optarg);
1181           break;
1182         case OPTION_DISCARD_NONE:
1183           link_info.discard = discard_none;
1184           break;
1185         case 'X':
1186           link_info.discard = discard_l;
1187           break;
1188         case 'x':
1189           link_info.discard = discard_all;
1190           break;
1191         case 'Y':
1192           if (strncmp (optarg, "P,", 2) == 0)
1193             optarg += 2;
1194           if (default_dirlist != NULL)
1195             free (default_dirlist);
1196           default_dirlist = xstrdup (optarg);
1197           break;
1198         case 'y':
1199           add_ysym (optarg);
1200           break;
1201         case OPTION_SPARE_DYNAMIC_TAGS:
1202           link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
1203           break;
1204         case OPTION_SPLIT_BY_RELOC:
1205           if (optarg != NULL)
1206             config.split_by_reloc = strtoul (optarg, NULL, 0);
1207           else
1208             config.split_by_reloc = 32768;
1209           break;
1210         case OPTION_SPLIT_BY_FILE:
1211           if (optarg != NULL)
1212             config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
1213           else
1214             config.split_by_file = 1;
1215           break;
1216         case OPTION_CHECK_SECTIONS:
1217           command_line.check_section_addresses = TRUE;
1218           break;
1219         case OPTION_NO_CHECK_SECTIONS:
1220           command_line.check_section_addresses = FALSE;
1221           break;
1222         case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
1223           command_line.accept_unknown_input_arch = TRUE;
1224           break;
1225         case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
1226           command_line.accept_unknown_input_arch = FALSE;
1227           break;
1228         case '(':
1229           if (ingroup)
1230             einfo (_("%P%F: may not nest groups (--help for usage)\n"));
1231
1232           lang_enter_group ();
1233           ingroup = 1;
1234           break;
1235         case ')':
1236           if (! ingroup)
1237             einfo (_("%P%F: group ended before it began (--help for usage)\n"));
1238
1239           lang_leave_group ();
1240           ingroup = 0;
1241           break;
1242         case OPTION_MPC860C0:
1243           /* Default value (in bytes).  */
1244           link_info.mpc860c0 = 20;
1245           if (optarg)
1246             {
1247               unsigned words;
1248
1249               words = is_num (optarg, 1, 10, 0);
1250               if (words == 0)
1251                 einfo (_("%P%F: invalid argument to option \"mpc860c0\"\n"));
1252
1253               /* Convert words to bytes.  */
1254               link_info.mpc860c0 = words * 4;
1255             }
1256           command_line.relax = TRUE;
1257           break;
1258
1259         case OPTION_INIT:
1260           link_info.init_function = optarg;
1261           break;
1262
1263         case OPTION_FINI:
1264           link_info.fini_function = optarg;
1265           break;
1266         }
1267     }
1268
1269   if (ingroup)
1270     lang_leave_group ();
1271
1272   if (default_dirlist != NULL)
1273     {
1274       set_default_dirlist (default_dirlist);
1275       free (default_dirlist);
1276     }
1277
1278   if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
1279     /* FIXME: Should we allow emulations a chance to set this ?  */
1280     link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
1281
1282   if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
1283     /* FIXME: Should we allow emulations a chance to set this ?  */
1284     link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
1285 }
1286
1287 /* Add the (colon-separated) elements of DIRLIST_PTR to the
1288    library search path.  */
1289
1290 static void
1291 set_default_dirlist (char *dirlist_ptr)
1292 {
1293   char *p;
1294
1295   while (1)
1296     {
1297       p = strchr (dirlist_ptr, PATH_SEPARATOR);
1298       if (p != NULL)
1299         *p = '\0';
1300       if (*dirlist_ptr != '\0')
1301         ldfile_add_library_path (dirlist_ptr, TRUE);
1302       if (p == NULL)
1303         break;
1304       dirlist_ptr = p + 1;
1305     }
1306 }
1307
1308 static void
1309 set_section_start (char *sect, char *valstr)
1310 {
1311   const char *end;
1312   bfd_vma val = bfd_scan_vma (valstr, &end, 16);
1313   if (*end)
1314     einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
1315   lang_section_start (sect, exp_intop (val));
1316 }
1317 \f
1318 /* Print help messages for the options.  */
1319
1320 static void
1321 help (void)
1322 {
1323   unsigned i;
1324   const char **targets, **pp;
1325
1326   printf (_("Usage: %s [options] file...\n"), program_name);
1327
1328   printf (_("Options:\n"));
1329   for (i = 0; i < OPTION_COUNT; i++)
1330     {
1331       if (ld_options[i].doc != NULL)
1332         {
1333           bfd_boolean comma;
1334           int len;
1335           unsigned j;
1336
1337           printf ("  ");
1338
1339           comma = FALSE;
1340           len = 2;
1341
1342           j = i;
1343           do
1344             {
1345               if (ld_options[j].shortopt != '\0'
1346                   && ld_options[j].control != NO_HELP)
1347                 {
1348                   printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
1349                   len += (comma ? 2 : 0) + 2;
1350                   if (ld_options[j].arg != NULL)
1351                     {
1352                       if (ld_options[j].opt.has_arg != optional_argument)
1353                         {
1354                           printf (" ");
1355                           ++len;
1356                         }
1357                       printf ("%s", _(ld_options[j].arg));
1358                       len += strlen (_(ld_options[j].arg));
1359                     }
1360                   comma = TRUE;
1361                 }
1362               ++j;
1363             }
1364           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1365
1366           j = i;
1367           do
1368             {
1369               if (ld_options[j].opt.name != NULL
1370                   && ld_options[j].control != NO_HELP)
1371                 {
1372                   int two_dashes =
1373                     (ld_options[j].control == TWO_DASHES
1374                      || ld_options[j].control == EXACTLY_TWO_DASHES);
1375
1376                   printf ("%s-%s%s",
1377                           comma ? ", " : "",
1378                           two_dashes ? "-" : "",
1379                           ld_options[j].opt.name);
1380                   len += ((comma ? 2 : 0)
1381                           + 1
1382                           + (two_dashes ? 1 : 0)
1383                           + strlen (ld_options[j].opt.name));
1384                   if (ld_options[j].arg != NULL)
1385                     {
1386                       printf (" %s", _(ld_options[j].arg));
1387                       len += 1 + strlen (_(ld_options[j].arg));
1388                     }
1389                   comma = TRUE;
1390                 }
1391               ++j;
1392             }
1393           while (j < OPTION_COUNT && ld_options[j].doc == NULL);
1394
1395           if (len >= 30)
1396             {
1397               printf ("\n");
1398               len = 0;
1399             }
1400
1401           for (; len < 30; len++)
1402             putchar (' ');
1403
1404           printf ("%s\n", _(ld_options[i].doc));
1405         }
1406     }
1407
1408   /* Note: Various tools (such as libtool) depend upon the
1409      format of the listings below - do not change them.  */
1410   /* xgettext:c-format */
1411   printf (_("%s: supported targets:"), program_name);
1412   targets = bfd_target_list ();
1413   for (pp = targets; *pp != NULL; pp++)
1414     printf (" %s", *pp);
1415   free (targets);
1416   printf ("\n");
1417
1418   /* xgettext:c-format */
1419   printf (_("%s: supported emulations: "), program_name);
1420   ldemul_list_emulations (stdout);
1421   printf ("\n");
1422
1423   /* xgettext:c-format */
1424   printf (_("%s: emulation specific options:\n"), program_name);
1425   ldemul_list_emulation_options (stdout);
1426   printf ("\n");
1427
1428   printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
1429 }