opcodes/

[binutils-gdb.git] / ld / lexsup.c

/* Parse options for the GNU linker.
   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012
   Free Software Foundation, Inc.

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "bfdver.h"
#include "libiberty.h"
#include <stdio.h>
#include <string.h>
#include "safe-ctype.h"
#include "getopt.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include <ldgram.h>
#include "ldlex.h"
#include "ldfile.h"
#include "ldver.h"
#include "ldemul.h"
#include "demangle.h"
#ifdef ENABLE_PLUGINS
#include "plugin.h"
#endif /* ENABLE_PLUGINS */

#ifndef PATH_SEPARATOR
#if defined (__MSDOS__) || (defined (_WIN32) && ! defined (__CYGWIN32__))
#define PATH_SEPARATOR ';'
#else
#define PATH_SEPARATOR ':'
#endif
#endif

/* Somewhere above, sys/stat.h got included . . . .  */
#if !defined(S_ISDIR) && defined(S_IFDIR)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif

static void set_default_dirlist (char *);
static void set_section_start (char *, char *);
static void set_segment_start (const char *, char *);
static void help (void);

/* The long options.  This structure is used for both the option
   parsing and the help text.  */

enum control_enum {
  /* Use one dash before long option name.  */
  ONE_DASH,
  /* Use two dashes before long option name.  */
  TWO_DASHES,
  /* Only accept two dashes before the long option name.
     This is an overloading of the use of this enum, since originally it
     was only intended to tell the --help display function how to display
     the long option name.  This feature was added in order to resolve
     the confusion about the -omagic command line switch.  Is it setting
     the output file name to "magic" or is it setting the NMAGIC flag on
     the output ?  It has been decided that it is setting the output file
     name, and that if you want to set the NMAGIC flag you should use -N
     or --omagic.  */
  EXACTLY_TWO_DASHES,
  /* Don't mention this option in --help output.  */
  NO_HELP
};

struct ld_option
{
  /* The long option information.  */
  struct option opt;
  /* The short option with the same meaning ('\0' if none).  */
  char shortopt;
  /* The name of the argument (NULL if none).  */
  const char *arg;
  /* The documentation string.  If this is NULL, this is a synonym for
     the previous option.  */
  const char *doc;
  enum control_enum control;
};

static const struct ld_option ld_options[] =
{
  { {NULL, required_argument, NULL, '\0'},
    'a', N_("KEYWORD"), N_("Shared library control for HP/UX compatibility"),
    ONE_DASH },
  { {"architecture", required_argument, NULL, 'A'},
    'A', N_("ARCH"), N_("Set architecture") , TWO_DASHES },
  { {"format", required_argument, NULL, 'b'},
    'b', N_("TARGET"), N_("Specify target for following input files"),
    TWO_DASHES },
  { {"mri-script", required_argument, NULL, 'c'},
    'c', N_("FILE"), N_("Read MRI format linker script"), TWO_DASHES },
  { {"dc", no_argument, NULL, 'd'},
    'd', NULL, N_("Force common symbols to be defined"), ONE_DASH },
  { {"dp", no_argument, NULL, 'd'},
    '\0', NULL, NULL, ONE_DASH },
  { {"entry", required_argument, NULL, 'e'},
    'e', N_("ADDRESS"), N_("Set start address"), TWO_DASHES },
  { {"export-dynamic", no_argument, NULL, OPTION_EXPORT_DYNAMIC},
    'E', NULL, N_("Export all dynamic symbols"), TWO_DASHES },
  { {"no-export-dynamic", no_argument, NULL, OPTION_NO_EXPORT_DYNAMIC},
    '\0', NULL, N_("Undo the effect of --export-dynamic"), TWO_DASHES },
  { {"EB", no_argument, NULL, OPTION_EB},
    '\0', NULL, N_("Link big-endian objects"), ONE_DASH },
  { {"EL", no_argument, NULL, OPTION_EL},
    '\0', NULL, N_("Link little-endian objects"), ONE_DASH },
  { {"auxiliary", required_argument, NULL, 'f'},
    'f', N_("SHLIB"), N_("Auxiliary filter for shared object symbol table"),
    TWO_DASHES },
  { {"filter", required_argument, NULL, 'F'},
    'F', N_("SHLIB"), N_("Filter for shared object symbol table"),
    TWO_DASHES },
  { {NULL, no_argument, NULL, '\0'},
    'g', NULL, N_("Ignored"), ONE_DASH },
  { {"gpsize", required_argument, NULL, 'G'},
    'G', N_("SIZE"), N_("Small data size (if no size, same as --shared)"),
    TWO_DASHES },
  { {"soname", required_argument, NULL, OPTION_SONAME},
    'h', N_("FILENAME"), N_("Set internal name of shared library"), ONE_DASH },
  { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
    'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
    TWO_DASHES },
  { {"library", required_argument, NULL, 'l'},
    'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
  { {"library-path", required_argument, NULL, 'L'},
    'L', N_("DIRECTORY"), N_("Add DIRECTORY to library search path"),
    TWO_DASHES },
  { {"sysroot=<DIRECTORY>", required_argument, NULL, OPTION_SYSROOT},
    '\0', NULL, N_("Override the default sysroot location"), TWO_DASHES },
  { {NULL, required_argument, NULL, '\0'},
    'm', N_("EMULATION"), N_("Set emulation"), ONE_DASH },
  { {"print-map", no_argument, NULL, 'M'},
    'M', NULL, N_("Print map file on standard output"), TWO_DASHES },
  { {"nmagic", no_argument, NULL, 'n'},
    'n', NULL, N_("Do not page align data"), TWO_DASHES },
  { {"omagic", no_argument, NULL, 'N'},
    'N', NULL, N_("Do not page align data, do not make text readonly"),
    EXACTLY_TWO_DASHES },
  { {"no-omagic", no_argument, NULL, OPTION_NO_OMAGIC},
    '\0', NULL, N_("Page align data, make text readonly"),
    EXACTLY_TWO_DASHES },
  { {"output", required_argument, NULL, 'o'},
    'o', N_("FILE"), N_("Set output file name"), EXACTLY_TWO_DASHES },
  { {NULL, required_argument, NULL, '\0'},
    'O', NULL, N_("Optimize output file"), ONE_DASH },
#ifdef ENABLE_PLUGINS
  { {"plugin", required_argument, NULL, OPTION_PLUGIN},
    '\0', N_("PLUGIN"), N_("Load named plugin"), ONE_DASH },
  { {"plugin-opt", required_argument, NULL, OPTION_PLUGIN_OPT},
    '\0', N_("ARG"), N_("Send arg to last-loaded plugin"), ONE_DASH },
  { {"flto", optional_argument, NULL, OPTION_IGNORE},
    '\0', NULL, N_("Ignored for GCC LTO option compatibility"),
    ONE_DASH },
  { {"flto-partition=", required_argument, NULL, OPTION_IGNORE},
    '\0', NULL, N_("Ignored for GCC LTO option compatibility"),
    ONE_DASH },
#endif /* ENABLE_PLUGINS */
  { {"Qy", no_argument, NULL, OPTION_IGNORE},
    '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
  { {"emit-relocs", no_argument, NULL, 'q'},
    'q', NULL, "Generate relocations in final output", TWO_DASHES },
  { {"relocatable", no_argument, NULL, 'r'},
    'r', NULL, N_("Generate relocatable output"), TWO_DASHES },
  { {NULL, no_argument, NULL, '\0'},
    'i', NULL, NULL, ONE_DASH },
  { {"just-symbols", required_argument, NULL, 'R'},
    'R', N_("FILE"), N_("Just link symbols (if directory, same as --rpath)"),
    TWO_DASHES },
  { {"strip-all", no_argument, NULL, 's'},
    's', NULL, N_("Strip all symbols"), TWO_DASHES },
  { {"strip-debug", no_argument, NULL, 'S'},
    'S', NULL, N_("Strip debugging symbols"), TWO_DASHES },
  { {"strip-discarded", no_argument, NULL, OPTION_STRIP_DISCARDED},
    '\0', NULL, N_("Strip symbols in discarded sections"), TWO_DASHES },
  { {"no-strip-discarded", no_argument, NULL, OPTION_NO_STRIP_DISCARDED},
    '\0', NULL, N_("Do not strip symbols in discarded sections"), TWO_DASHES },
  { {"trace", no_argument, NULL, 't'},
    't', NULL, N_("Trace file opens"), TWO_DASHES },
  { {"script", required_argument, NULL, 'T'},
    'T', N_("FILE"), N_("Read linker script"), TWO_DASHES },
  { {"default-script", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
    '\0', N_("FILE"), N_("Read default linker script"), TWO_DASHES },
  { {"dT", required_argument, NULL, OPTION_DEFAULT_SCRIPT},
    '\0', NULL, NULL, ONE_DASH },
  { {"undefined", required_argument, NULL, 'u'},
    'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"),
    TWO_DASHES },
  { {"unique", optional_argument, NULL, OPTION_UNIQUE},
    '\0', N_("[=SECTION]"),
    N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES },
  { {"Ur", no_argument, NULL, OPTION_UR},
    '\0', NULL, N_("Build global constructor/destructor tables"), ONE_DASH },
  { {"version", no_argument, NULL, OPTION_VERSION},
    'v', NULL, N_("Print version information"), TWO_DASHES },
  { {NULL, no_argument, NULL, '\0'},
    'V', NULL, N_("Print version and emulation information"), ONE_DASH },
  { {"discard-all", no_argument, NULL, 'x'},
    'x', NULL, N_("Discard all local symbols"), TWO_DASHES },
  { {"discard-locals", no_argument, NULL, 'X'},
    'X', NULL, N_("Discard temporary local symbols (default)"), TWO_DASHES },
  { {"discard-none", no_argument, NULL, OPTION_DISCARD_NONE},
    '\0', NULL, N_("Don't discard any local symbols"), TWO_DASHES },
  { {"trace-symbol", required_argument, NULL, 'y'},
    'y', N_("SYMBOL"), N_("Trace mentions of SYMBOL"), TWO_DASHES },
  { {NULL, required_argument, NULL, '\0'},
    'Y', N_("PATH"), N_("Default search path for Solaris compatibility"),
    ONE_DASH },
  { {"start-group", no_argument, NULL, '('},
    '(', NULL, N_("Start a group"), TWO_DASHES },
  { {"end-group", no_argument, NULL, ')'},
    ')', NULL, N_("End a group"), TWO_DASHES },
  { {"accept-unknown-input-arch", no_argument, NULL,
     OPTION_ACCEPT_UNKNOWN_INPUT_ARCH},
    '\0', NULL,
    N_("Accept input files whose architecture cannot be determined"),
    TWO_DASHES },
  { {"no-accept-unknown-input-arch", no_argument, NULL,
     OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
    '\0', NULL, N_("Reject input files whose architecture is unknown"),
    TWO_DASHES },

  /* The next two options are deprecated because of their similarity to
     --as-needed and --no-as-needed.  They have been replaced by
     --copy-dt-needed-entries and --no-copy-dt-needed-entries.  */
  { {"add-needed", no_argument, NULL, OPTION_ADD_DT_NEEDED_FOR_DYNAMIC},
    '\0', NULL, NULL, NO_HELP },
  { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC},
    '\0', NULL, NULL, NO_HELP },

  { {"as-needed", no_argument, NULL, OPTION_ADD_DT_NEEDED_FOR_REGULAR},
    '\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
    TWO_DASHES },
  { {"no-as-needed", no_argument, NULL, OPTION_NO_ADD_DT_NEEDED_FOR_REGULAR},
    '\0', NULL, N_("Always set DT_NEEDED for dynamic libraries mentioned on\n"
                   "                                the command line"),
    TWO_DASHES },
  { {"assert", required_argument, NULL, OPTION_ASSERT},
    '\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
  { {"Bdynamic", no_argument, NULL, OPTION_CALL_SHARED},
    '\0', NULL, N_("Link against shared libraries"), ONE_DASH },
  { {"dy", no_argument, NULL, OPTION_CALL_SHARED},
    '\0', NULL, NULL, ONE_DASH },
  { {"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
    '\0', NULL, NULL, ONE_DASH },
  { {"Bstatic", no_argument, NULL, OPTION_NON_SHARED},
    '\0', NULL, N_("Do not link against shared libraries"), ONE_DASH },
  { {"dn", no_argument, NULL, OPTION_NON_SHARED},
    '\0', NULL, NULL, ONE_DASH },
  { {"non_shared", no_argument, NULL, OPTION_NON_SHARED},
    '\0', NULL, NULL, ONE_DASH },
  { {"static", no_argument, NULL, OPTION_NON_SHARED},
    '\0', NULL, NULL, ONE_DASH },
  { {"Bsymbolic", no_argument, NULL, OPTION_SYMBOLIC},
    '\0', NULL, N_("Bind global references locally"), ONE_DASH },
  { {"Bsymbolic-functions", no_argument, NULL, OPTION_SYMBOLIC_FUNCTIONS},
    '\0', NULL, N_("Bind global function references locally"), ONE_DASH },
  { {"check-sections", no_argument, NULL, OPTION_CHECK_SECTIONS},
    '\0', NULL, N_("Check section addresses for overlaps (default)"),
    TWO_DASHES },
  { {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
    '\0', NULL, N_("Do not check section addresses for overlaps"),
    TWO_DASHES },
  { {"copy-dt-needed-entries", no_argument, NULL,
     OPTION_ADD_DT_NEEDED_FOR_DYNAMIC},
    '\0', NULL, N_("Copy DT_NEEDED links mentioned inside DSOs that follow"),
    TWO_DASHES },
  { {"no-copy-dt-needed-entries", no_argument, NULL,
     OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC},
    '\0', NULL, N_("Do not copy DT_NEEDED links mentioned inside DSOs that follow"),
    TWO_DASHES },

  { {"cref", no_argument, NULL, OPTION_CREF},
    '\0', NULL, N_("Output cross reference table"), TWO_DASHES },
  { {"defsym", required_argument, NULL, OPTION_DEFSYM},
    '\0', N_("SYMBOL=EXPRESSION"), N_("Define a symbol"), TWO_DASHES },
  { {"demangle", optional_argument, NULL, OPTION_DEMANGLE},
    '\0', N_("[=STYLE]"), N_("Demangle symbol names [using STYLE]"),
    TWO_DASHES },
  { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
    '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
  { {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL},
    '\0', NULL, N_("Treat warnings as errors"),
    TWO_DASHES },
  { {"no-fatal-warnings", no_argument, NULL, OPTION_NO_WARN_FATAL},
    '\0', NULL, N_("Do not treat warnings as errors (default)"),
    TWO_DASHES },
  { {"fini", required_argument, NULL, OPTION_FINI},
    '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
  { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
    '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
  { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
    '\0', NULL, N_("Remove unused sections (on some targets)"),
    TWO_DASHES },
  { {"no-gc-sections", no_argument, NULL, OPTION_NO_GC_SECTIONS},
    '\0', NULL, N_("Don't remove unused sections (default)"),
    TWO_DASHES },
  { {"print-gc-sections", no_argument, NULL, OPTION_PRINT_GC_SECTIONS},
    '\0', NULL, N_("List removed unused sections on stderr"),
    TWO_DASHES },
  { {"no-print-gc-sections", no_argument, NULL, OPTION_NO_PRINT_GC_SECTIONS},
    '\0', NULL, N_("Do not list removed unused sections"),
    TWO_DASHES },
  { {"hash-size=<NUMBER>", required_argument, NULL, OPTION_HASH_SIZE},
    '\0', NULL, N_("Set default hash table size close to <NUMBER>"),
    TWO_DASHES },
  { {"help", no_argument, NULL, OPTION_HELP},
    '\0', NULL, N_("Print option help"), TWO_DASHES },
  { {"init", required_argument, NULL, OPTION_INIT},
    '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
  { {"Map", required_argument, NULL, OPTION_MAP},
    '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
  { {"no-define-common", no_argument, NULL, OPTION_NO_DEFINE_COMMON},
    '\0', NULL, N_("Do not define Common storage"), TWO_DASHES },
  { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
    '\0', NULL, N_("Do not demangle symbol names"), TWO_DASHES },
  { {"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
    '\0', NULL, N_("Use less memory and more disk I/O"), TWO_DASHES },
  { {"no-undefined", no_argument, NULL, OPTION_NO_UNDEFINED},
    '\0', NULL, N_("Do not allow unresolved references in object files"),
    TWO_DASHES },
  { {"allow-shlib-undefined", no_argument, NULL, OPTION_ALLOW_SHLIB_UNDEFINED},
    '\0', NULL, N_("Allow unresolved references in shared libraries"),
    TWO_DASHES },
  { {"no-allow-shlib-undefined", no_argument, NULL,
     OPTION_NO_ALLOW_SHLIB_UNDEFINED},
    '\0', NULL, N_("Do not allow unresolved references in shared libs"),
    TWO_DASHES },
  { {"allow-multiple-definition", no_argument, NULL,
     OPTION_ALLOW_MULTIPLE_DEFINITION},
    '\0', NULL, N_("Allow multiple definitions"), TWO_DASHES },
  { {"no-undefined-version", no_argument, NULL, OPTION_NO_UNDEFINED_VERSION},
    '\0', NULL, N_("Disallow undefined version"), TWO_DASHES },
  { {"default-symver", no_argument, NULL, OPTION_DEFAULT_SYMVER},
    '\0', NULL, N_("Create default symbol version"), TWO_DASHES },
  { {"default-imported-symver", no_argument, NULL,
      OPTION_DEFAULT_IMPORTED_SYMVER},
    '\0', NULL, N_("Create default symbol version for imported symbols"),
    TWO_DASHES },
  { {"no-warn-mismatch", no_argument, NULL, OPTION_NO_WARN_MISMATCH},
    '\0', NULL, N_("Don't warn about mismatched input files"), TWO_DASHES},
  { {"no-warn-search-mismatch", no_argument, NULL,
     OPTION_NO_WARN_SEARCH_MISMATCH},
    '\0', NULL, N_("Don't warn on finding an incompatible library"),
    TWO_DASHES},
  { {"no-whole-archive", no_argument, NULL, OPTION_NO_WHOLE_ARCHIVE},
    '\0', NULL, N_("Turn off --whole-archive"), TWO_DASHES },
  { {"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
    '\0', NULL, N_("Create an output file even if errors occur"),
    TWO_DASHES },
  { {"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
    '\0', NULL, NULL, NO_HELP },
  { {"nostdlib", no_argument, NULL, OPTION_NOSTDLIB},
    '\0', NULL, N_("Only use library directories specified on\n"
                   "                                the command line"),
    ONE_DASH },
  { {"oformat", required_argument, NULL, OPTION_OFORMAT},
    '\0', N_("TARGET"), N_("Specify target of output file"),
    EXACTLY_TWO_DASHES },
  { {"print-output-format", no_argument, NULL, OPTION_PRINT_OUTPUT_FORMAT},
    '\0', NULL, N_("Print default output format"), TWO_DASHES },
  { {"qmagic", no_argument, NULL, OPTION_IGNORE},
    '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH },
  { {"reduce-memory-overheads", no_argument, NULL,
     OPTION_REDUCE_MEMORY_OVERHEADS},
    '\0', NULL, N_("Reduce memory overheads, possibly taking much longer"),
    TWO_DASHES },
  { {"relax", no_argument, NULL, OPTION_RELAX},
    '\0', NULL, N_("Reduce code size by using target specific optimizations"), TWO_DASHES },
  { {"no-relax", no_argument, NULL, OPTION_NO_RELAX},
    '\0', NULL, N_("Do not use relaxation techniques to reduce code size"), TWO_DASHES },
  { {"retain-symbols-file", required_argument, NULL,
     OPTION_RETAIN_SYMBOLS_FILE},
    '\0', N_("FILE"), N_("Keep only symbols listed in FILE"), TWO_DASHES },
  { {"rpath", required_argument, NULL, OPTION_RPATH},
    '\0', N_("PATH"), N_("Set runtime shared library search path"), ONE_DASH },
  { {"rpath-link", required_argument, NULL, OPTION_RPATH_LINK},
    '\0', N_("PATH"), N_("Set link time shared library search path"),
    ONE_DASH },
  { {"shared", no_argument, NULL, OPTION_SHARED},
    '\0', NULL, N_("Create a shared library"), ONE_DASH },
  { {"Bshareable", no_argument, NULL, OPTION_SHARED }, /* FreeBSD.  */
    '\0', NULL, NULL, ONE_DASH },
  { {"pie", no_argument, NULL, OPTION_PIE},
    '\0', NULL, N_("Create a position independent executable"), ONE_DASH },
  { {"pic-executable", no_argument, NULL, OPTION_PIE},
    '\0', NULL, NULL, TWO_DASHES },
  { {"sort-common", optional_argument, NULL, OPTION_SORT_COMMON},
    '\0', N_("[=ascending|descending]"), 
    N_("Sort common symbols by alignment [in specified order]"), 
    TWO_DASHES },
  { {"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
    '\0', NULL, NULL, NO_HELP },
  { {"sort-section", required_argument, NULL, OPTION_SORT_SECTION},
    '\0', N_("name|alignment"), 
    N_("Sort sections by name or maximum alignment"), TWO_DASHES },
  { {"spare-dynamic-tags", required_argument, NULL, OPTION_SPARE_DYNAMIC_TAGS},
    '\0', N_("COUNT"), N_("How many tags to reserve in .dynamic section"),
    TWO_DASHES },
  { {"split-by-file", optional_argument, NULL, OPTION_SPLIT_BY_FILE},
    '\0', N_("[=SIZE]"), N_("Split output sections every SIZE octets"),
    TWO_DASHES },
  { {"split-by-reloc", optional_argument, NULL, OPTION_SPLIT_BY_RELOC},
    '\0', N_("[=COUNT]"), N_("Split output sections every COUNT relocs"),
    TWO_DASHES },
  { {"stats", no_argument, NULL, OPTION_STATS},
    '\0', NULL, N_("Print memory usage statistics"), TWO_DASHES },
  { {"target-help", no_argument, NULL, OPTION_TARGET_HELP},
    '\0', NULL, N_("Display target specific options"), TWO_DASHES },
  { {"task-link", required_argument, NULL, OPTION_TASK_LINK},
    '\0', N_("SYMBOL"), N_("Do task level linking"), TWO_DASHES },
  { {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT},
    '\0', NULL, N_("Use same format as native linker"), TWO_DASHES },
  { {"section-start", required_argument, NULL, OPTION_SECTION_START},
    '\0', N_("SECTION=ADDRESS"), N_("Set address of named section"),
    TWO_DASHES },
  { {"Tbss", required_argument, NULL, OPTION_TBSS},
    '\0', N_("ADDRESS"), N_("Set address of .bss section"), ONE_DASH },
  { {"Tdata", required_argument, NULL, OPTION_TDATA},
    '\0', N_("ADDRESS"), N_("Set address of .data section"), ONE_DASH },
  { {"Ttext", required_argument, NULL, OPTION_TTEXT},
    '\0', N_("ADDRESS"), N_("Set address of .text section"), ONE_DASH },
  { {"Ttext-segment", required_argument, NULL, OPTION_TTEXT_SEGMENT},
    '\0', N_("ADDRESS"), N_("Set address of text segment"), ONE_DASH },
  { {"unresolved-symbols=<method>", required_argument, NULL,
     OPTION_UNRESOLVED_SYMBOLS},
    '\0', NULL, N_("How to handle unresolved symbols.  <method> is:\n"
                   "                                ignore-all, report-all, ignore-in-object-files,\n"
                   "                                ignore-in-shared-libs"),
    TWO_DASHES },
  { {"verbose", optional_argument, NULL, OPTION_VERBOSE},
    '\0', N_("[=NUMBER]"),
    N_("Output lots of information during link"), TWO_DASHES },
  { {"dll-verbose", no_argument, NULL, OPTION_VERBOSE}, /* Linux.  */
    '\0', NULL, NULL, NO_HELP },
  { {"version-script", required_argument, NULL, OPTION_VERSION_SCRIPT },
    '\0', N_("FILE"), N_("Read version information script"), TWO_DASHES },
  { {"version-exports-section", required_argument, NULL,
     OPTION_VERSION_EXPORTS_SECTION },
    '\0', N_("SYMBOL"), N_("Take export symbols list from .exports, using\n"
                           "                                SYMBOL as the version."),
    TWO_DASHES },
  { {"dynamic-list-data", no_argument, NULL, OPTION_DYNAMIC_LIST_DATA},
    '\0', NULL, N_("Add data symbols to dynamic list"), TWO_DASHES },
  { {"dynamic-list-cpp-new", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_NEW},
    '\0', NULL, N_("Use C++ operator new/delete dynamic list"), TWO_DASHES },
  { {"dynamic-list-cpp-typeinfo", no_argument, NULL, OPTION_DYNAMIC_LIST_CPP_TYPEINFO},
    '\0', NULL, N_("Use C++ typeinfo dynamic list"), TWO_DASHES },
  { {"dynamic-list", required_argument, NULL, OPTION_DYNAMIC_LIST},
    '\0', N_("FILE"), N_("Read dynamic list"), TWO_DASHES },
  { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
    '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
  { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
    '\0', NULL, N_("Warn if global constructors/destructors are seen"),
    TWO_DASHES },
  { {"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
    '\0', NULL, N_("Warn if the multiple GP values are used"), TWO_DASHES },
  { {"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
    '\0', NULL, N_("Warn only once per undefined symbol"), TWO_DASHES },
  { {"warn-section-align", no_argument, NULL, OPTION_WARN_SECTION_ALIGN},
    '\0', NULL, N_("Warn if start of section changes due to alignment"),
    TWO_DASHES },
  { {"warn-shared-textrel", no_argument, NULL, OPTION_WARN_SHARED_TEXTREL},
    '\0', NULL, N_("Warn if shared object has DT_TEXTREL"),
    TWO_DASHES },
  { {"warn-alternate-em", no_argument, NULL, OPTION_WARN_ALTERNATE_EM},
    '\0', NULL, N_("Warn if an object has alternate ELF machine code"),
    TWO_DASHES },
  { {"warn-unresolved-symbols", no_argument, NULL,
     OPTION_WARN_UNRESOLVED_SYMBOLS},
    '\0', NULL, N_("Report unresolved symbols as warnings"), TWO_DASHES },
  { {"error-unresolved-symbols", no_argument, NULL,
     OPTION_ERROR_UNRESOLVED_SYMBOLS},
    '\0', NULL, N_("Report unresolved symbols as errors"), TWO_DASHES },
  { {"whole-archive", no_argument, NULL, OPTION_WHOLE_ARCHIVE},
    '\0', NULL, N_("Include all objects from following archives"),
    TWO_DASHES },
  { {"wrap", required_argument, NULL, OPTION_WRAP},
    '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
};

#define OPTION_COUNT ARRAY_SIZE (ld_options)

void
parse_args (unsigned argc, char **argv)
{
  unsigned i;
  int is, il, irl;
  int ingroup = 0;
  char *default_dirlist = NULL;
  char *shortopts;
  struct option *longopts;
  struct option *really_longopts;
  int last_optind;
  enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;

  shortopts = (char *) xmalloc (OPTION_COUNT * 3 + 2);
  longopts = (struct option *)
      xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
  really_longopts = (struct option *)
      malloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));

  /* Starting the short option string with '-' is for programs that
     expect options and other ARGV-elements in any order and that care about
     the ordering of the two.  We describe each non-option ARGV-element
     as if it were the argument of an option with character code 1.  */
  shortopts[0] = '-';
  is = 1;
  il = 0;
  irl = 0;
  for (i = 0; i < OPTION_COUNT; i++)
    {
      if (ld_options[i].shortopt != '\0')
        {
          shortopts[is] = ld_options[i].shortopt;
          ++is;
          if (ld_options[i].opt.has_arg == required_argument
              || ld_options[i].opt.has_arg == optional_argument)
            {
              shortopts[is] = ':';
              ++is;
              if (ld_options[i].opt.has_arg == optional_argument)
                {
                  shortopts[is] = ':';
                  ++is;
                }
            }
        }
      if (ld_options[i].opt.name != NULL)
        {
          if (ld_options[i].control == EXACTLY_TWO_DASHES)
            {
              really_longopts[irl] = ld_options[i].opt;
              ++irl;
            }
          else
            {
              longopts[il] = ld_options[i].opt;
              ++il;
            }
        }
    }
  shortopts[is] = '\0';
  longopts[il].name = NULL;
  really_longopts[irl].name = NULL;

  ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);

  /* The -G option is ambiguous on different platforms.  Sometimes it
     specifies the largest data size to put into the small data
     section.  Sometimes it is equivalent to --shared.  Unfortunately,
     the first form takes an argument, while the second does not.

     We need to permit the --shared form because on some platforms,
     such as Solaris, gcc -shared will pass -G to the linker.

     To permit either usage, we look through the argument list.  If we
     find -G not followed by a number, we change it into --shared.
     This will work for most normal cases.  */
  for (i = 1; i < argc; i++)
    if (strcmp (argv[i], "-G") == 0
        && (i + 1 >= argc
            || ! ISDIGIT (argv[i + 1][0])))
      argv[i] = (char *) "--shared";

  /* Because we permit long options to start with a single dash, and
     we have a --library option, and the -l option is conventionally
     used with an immediately following argument, we can have bad
     results if somebody tries to use -l with a library whose name
     happens to start with "ibrary", as in -li.  We avoid problems by
     simply turning -l into --library.  This means that users will
     have to use two dashes in order to use --library, which is OK
     since that's how it is documented.

     FIXME: It's possible that this problem can arise for other short
     options as well, although the user does always have the recourse
     of adding a space between the option and the argument.  */
  for (i = 1; i < argc; i++)
    {
      if (argv[i][0] == '-'
          && argv[i][1] == 'l'
          && argv[i][2] != '\0')
        {
          char *n;

          n = (char *) xmalloc (strlen (argv[i]) + 20);
          sprintf (n, "--library=%s", argv[i] + 2);
          argv[i] = n;
        }
    }

  last_optind = -1;
  while (1)
    {
      int longind;
      int optc;
      static unsigned int defsym_count;

      /* Using last_optind lets us avoid calling ldemul_parse_args
         multiple times on a single option, which would lead to
         confusion in the internal static variables maintained by
         getopt.  This could otherwise happen for an argument like
         -nx, in which the -n is parsed as a single option, and we
         loop around to pick up the -x.  */
      if (optind != last_optind)
        if (ldemul_parse_args (argc, argv))
          continue;

      /* getopt_long_only is like getopt_long, but '-' as well as '--'
         can indicate a long option.  */
      opterr = 0;
      last_optind = optind;
      optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
      if (optc == '?')
        {
          optind = last_optind;
          optc = getopt_long (argc, argv, "-", really_longopts, &longind);
        }

      if (ldemul_handle_option (optc))
        continue;

      if (optc == -1)
        break;

      switch (optc)
        {
        case '?':
          einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
          /* Fall through.  */

        default:
          einfo (_("%P%F: use the --help option for usage information\n"));

        case 1:                 /* File name.  */
          lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
          break;

        case OPTION_IGNORE:
          break;
        case 'a':
          /* For HP/UX compatibility.  Actually -a shared should mean
             ``use only shared libraries'' but, then, we don't
             currently support shared libraries on HP/UX anyhow.  */
          if (strcmp (optarg, "archive") == 0)
            input_flags.dynamic = FALSE;
          else if (strcmp (optarg, "shared") == 0
                   || strcmp (optarg, "default") == 0)
            input_flags.dynamic = TRUE;
          else
            einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
          break;
        case OPTION_ASSERT:
          /* FIXME: We just ignore these, but we should handle them.  */
          if (strcmp (optarg, "definitions") == 0)
            ;
          else if (strcmp (optarg, "nodefinitions") == 0)
            ;
          else if (strcmp (optarg, "nosymbolic") == 0)
            ;
          else if (strcmp (optarg, "pure-text") == 0)
            ;
          else
            einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
          break;
        case 'A':
          ldfile_add_arch (optarg);
          break;
        case 'b':
          lang_add_target (optarg);
          break;
        case 'c':
          ldfile_open_command_file (optarg);
          parser_input = input_mri_script;
          yyparse ();
          break;
        case OPTION_CALL_SHARED:
          input_flags.dynamic = TRUE;
          break;
        case OPTION_NON_SHARED:
          input_flags.dynamic = FALSE;
          break;
        case OPTION_CREF:
          command_line.cref = TRUE;
          link_info.notice_all = TRUE;
          break;
        case 'd':
          command_line.force_common_definition = TRUE;
          break;
        case OPTION_DEFSYM:
          lex_string = optarg;
          lex_redirect (optarg, "--defsym", ++defsym_count);
          parser_input = input_defsym;
          yyparse ();
          lex_string = NULL;
          break;
        case OPTION_DEMANGLE:
          demangling = TRUE;
          if (optarg != NULL)
            {
              enum demangling_styles style;

              style = cplus_demangle_name_to_style (optarg);
              if (style == unknown_demangling)
                einfo (_("%F%P: unknown demangling style `%s'\n"),
                       optarg);

              cplus_demangle_set_style (style);
            }
          break;
        case 'I':               /* Used on Solaris.  */
        case OPTION_DYNAMIC_LINKER:
          command_line.interpreter = optarg;
          break;
        case OPTION_SYSROOT:
          /* Already handled in ldmain.c.  */
          break;
        case OPTION_EB:
          command_line.endian = ENDIAN_BIG;
          break;
        case OPTION_EL:
          command_line.endian = ENDIAN_LITTLE;
          break;
        case OPTION_EMBEDDED_RELOCS:
          command_line.embedded_relocs = TRUE;
          break;
        case OPTION_EXPORT_DYNAMIC:
        case 'E': /* HP/UX compatibility.  */
          link_info.export_dynamic = TRUE;
          break;
        case OPTION_NO_EXPORT_DYNAMIC:
          link_info.export_dynamic = FALSE;
          break;
        case 'e':
          lang_add_entry (optarg, TRUE);
          break;
        case 'f':
          if (command_line.auxiliary_filters == NULL)
            {
              command_line.auxiliary_filters = (char **)
                  xmalloc (2 * sizeof (char *));
              command_line.auxiliary_filters[0] = optarg;
              command_line.auxiliary_filters[1] = NULL;
            }
          else
            {
              int c;
              char **p;

              c = 0;
              for (p = command_line.auxiliary_filters; *p != NULL; p++)
                ++c;
              command_line.auxiliary_filters = (char **)
                  xrealloc (command_line.auxiliary_filters,
                            (c + 2) * sizeof (char *));
              command_line.auxiliary_filters[c] = optarg;
              command_line.auxiliary_filters[c + 1] = NULL;
            }
          break;
        case 'F':
          command_line.filter_shlib = optarg;
          break;
        case OPTION_FORCE_EXE_SUFFIX:
          command_line.force_exe_suffix = TRUE;
          break;
        case 'G':
          {
            char *end;
            g_switch_value = strtoul (optarg, &end, 0);
            if (*end)
              einfo (_("%P%F: invalid number `%s'\n"), optarg);
          }
          break;
        case 'g':
          /* Ignore.  */
          break;
        case OPTION_GC_SECTIONS:
          link_info.gc_sections = TRUE;
          break;
        case OPTION_PRINT_GC_SECTIONS:
          link_info.print_gc_sections = TRUE;
          break;
        case OPTION_HELP:
          help ();
          xexit (0);
          break;
        case 'L':
          ldfile_add_library_path (optarg, TRUE);
          break;
        case 'l':
          lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
          break;
        case 'M':
          config.map_filename = "-";
          break;
        case 'm':
          /* Ignore.  Was handled in a pre-parse.   */
          break;
        case OPTION_MAP:
          config.map_filename = optarg;
          break;
        case 'N':
          config.text_read_only = FALSE;
          config.magic_demand_paged = FALSE;
          input_flags.dynamic = FALSE;
          break;
        case OPTION_NO_OMAGIC:
          config.text_read_only = TRUE;
          config.magic_demand_paged = TRUE;
          /* NB/ Does not set input_flags.dynamic to TRUE.
             Use --call-shared or -Bdynamic for this.  */
          break;
        case 'n':
          config.magic_demand_paged = FALSE;
          input_flags.dynamic = FALSE;
          break;
        case OPTION_NO_DEFINE_COMMON:
          command_line.inhibit_common_definition = TRUE;
          break;
        case OPTION_NO_DEMANGLE:
          demangling = FALSE;
          break;
        case OPTION_NO_GC_SECTIONS:
          link_info.gc_sections = FALSE;
          break;
        case OPTION_NO_PRINT_GC_SECTIONS:
          link_info.print_gc_sections = FALSE;
          break;
        case OPTION_NO_KEEP_MEMORY:
          link_info.keep_memory = FALSE;
          break;
        case OPTION_NO_UNDEFINED:
          link_info.unresolved_syms_in_objects
            = how_to_report_unresolved_symbols;
          break;
        case OPTION_ALLOW_SHLIB_UNDEFINED:
          link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
          break;
        case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
          link_info.unresolved_syms_in_shared_libs
            = how_to_report_unresolved_symbols;
          break;
        case OPTION_UNRESOLVED_SYMBOLS:
          if (strcmp (optarg, "ignore-all") == 0)
            {
              link_info.unresolved_syms_in_objects = RM_IGNORE;
              link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
            }
          else if (strcmp (optarg, "report-all") == 0)
            {
              link_info.unresolved_syms_in_objects
                = how_to_report_unresolved_symbols;
              link_info.unresolved_syms_in_shared_libs
                = how_to_report_unresolved_symbols;
            }
          else if (strcmp (optarg, "ignore-in-object-files") == 0)
            {
              link_info.unresolved_syms_in_objects = RM_IGNORE;
              link_info.unresolved_syms_in_shared_libs
                = how_to_report_unresolved_symbols;
            }
          else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
            {
              link_info.unresolved_syms_in_objects
                = how_to_report_unresolved_symbols;
              link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
            }
          else
            einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
          break;
        case OPTION_WARN_UNRESOLVED_SYMBOLS:
          how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
          if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
            link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
          if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
            link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
          break;

        case OPTION_ERROR_UNRESOLVED_SYMBOLS:
          how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
          if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
            link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
          if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
            link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
          break;
        case OPTION_ALLOW_MULTIPLE_DEFINITION:
          link_info.allow_multiple_definition = TRUE;
          break;
        case OPTION_NO_UNDEFINED_VERSION:
          link_info.allow_undefined_version = FALSE;
          break;
        case OPTION_DEFAULT_SYMVER:
          link_info.create_default_symver = TRUE;
          break;
        case OPTION_DEFAULT_IMPORTED_SYMVER:
          link_info.default_imported_symver = TRUE;
          break;
        case OPTION_NO_WARN_MISMATCH:
          command_line.warn_mismatch = FALSE;
          break;
        case OPTION_NO_WARN_SEARCH_MISMATCH:
          command_line.warn_search_mismatch = FALSE;
          break;
        case OPTION_NOINHIBIT_EXEC:
          force_make_executable = TRUE;
          break;
        case OPTION_NOSTDLIB:
          config.only_cmd_line_lib_dirs = TRUE;
          break;
        case OPTION_NO_WHOLE_ARCHIVE:
          input_flags.whole_archive = FALSE;
          break;
        case 'O':
          /* FIXME "-O<non-digits> <value>" used to set the address of
             section <non-digits>.  Was this for compatibility with
             something, or can we create a new option to do that
             (with a syntax similar to -defsym)?
             getopt can't handle two args to an option without kludges.  */

          /* Enable optimizations of output files.  */
          link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
          break;
        case 'o':
          lang_add_output (optarg, 0);
          break;
        case OPTION_OFORMAT:
          lang_add_output_format (optarg, NULL, NULL, 0);
          break;
        case OPTION_PRINT_OUTPUT_FORMAT:
          command_line.print_output_format = TRUE;
          break;
#ifdef ENABLE_PLUGINS
        case OPTION_PLUGIN:
          if (plugin_opt_plugin (optarg))
            einfo (_("%P%F: %s: error loading plugin\n"),
                   plugin_error_plugin ());
          break;
        case OPTION_PLUGIN_OPT:
          if (plugin_opt_plugin_arg (optarg))
            einfo(_("%P%F: bad -plugin-opt option\n"));
          break;
#endif /* ENABLE_PLUGINS */
        case 'q':
          link_info.emitrelocations = TRUE;
          break;
        case 'i':
        case 'r':
          if (optind == last_optind)
            /* This can happen if the user put "-rpath,a" on the command
               line.  (Or something similar.  The comma is important).
               Getopt becomes confused and thinks that this is a -r option
               but it cannot parse the text after the -r so it refuses to
               increment the optind counter.  Detect this case and issue
               an error message here.  We cannot just make this a warning,
               increment optind, and continue because getopt is too confused
               and will seg-fault the next time around.  */
            einfo(_("%P%F: bad -rpath option\n"));

          link_info.relocatable = TRUE;
          config.build_constructors = FALSE;
          config.magic_demand_paged = FALSE;
          config.text_read_only = FALSE;
          input_flags.dynamic = FALSE;
          break;
        case 'R':
          /* The GNU linker traditionally uses -R to mean to include
             only the symbols from a file.  The Solaris linker uses -R
             to set the path used by the runtime linker to find
             libraries.  This is the GNU linker -rpath argument.  We
             try to support both simultaneously by checking the file
             named.  If it is a directory, rather than a regular file,
             we assume -rpath was meant.  */
          {
            struct stat s;

            if (stat (optarg, &s) >= 0
                && ! S_ISDIR (s.st_mode))
              {
                lang_add_input_file (optarg,
                                     lang_input_file_is_symbols_only_enum,
                                     NULL);
                break;
              }
          }
          /* Fall through.  */
        case OPTION_RPATH:
          if (command_line.rpath == NULL)
            command_line.rpath = xstrdup (optarg);
          else
            {
              size_t rpath_len = strlen (command_line.rpath);
              size_t optarg_len = strlen (optarg);
              char *buf;
              char *cp = command_line.rpath;

              /* First see whether OPTARG is already in the path.  */
              do
                {
                  if (strncmp (optarg, cp, optarg_len) == 0
                      && (cp[optarg_len] == 0
                          || cp[optarg_len] == config.rpath_separator))
                    /* We found it.  */
                    break;

                  /* Not yet found.  */
                  cp = strchr (cp, config.rpath_separator);
                  if (cp != NULL)
                    ++cp;
                }
              while (cp != NULL);

              if (cp == NULL)
                {
                  buf = (char *) xmalloc (rpath_len + optarg_len + 2);
                  sprintf (buf, "%s%c%s", command_line.rpath,
                           config.rpath_separator, optarg);
                  free (command_line.rpath);
                  command_line.rpath = buf;
                }
            }
          break;
        case OPTION_RPATH_LINK:
          if (command_line.rpath_link == NULL)
            command_line.rpath_link = xstrdup (optarg);
          else
            {
              char *buf;

              buf = (char *) xmalloc (strlen (command_line.rpath_link)
                                      + strlen (optarg)
                                      + 2);
              sprintf (buf, "%s%c%s", command_line.rpath_link,
                       config.rpath_separator, optarg);
              free (command_line.rpath_link);
              command_line.rpath_link = buf;
            }
          break;
        case OPTION_NO_RELAX:
          DISABLE_RELAXATION;
          break;
        case OPTION_RELAX:
          ENABLE_RELAXATION;
          break;
        case OPTION_RETAIN_SYMBOLS_FILE:
          add_keepsyms_file (optarg);
          break;
        case 'S':
          link_info.strip = strip_debugger;
          break;
        case 's':
          link_info.strip = strip_all;
          break;
        case OPTION_STRIP_DISCARDED:
          link_info.strip_discarded = TRUE;
          break;
        case OPTION_NO_STRIP_DISCARDED:
          link_info.strip_discarded = FALSE;
          break;
        case OPTION_SHARED:
          if (config.has_shared)
            {
              link_info.shared = TRUE;
              /* When creating a shared library, the default
                 behaviour is to ignore any unresolved references.  */
              if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
                link_info.unresolved_syms_in_objects = RM_IGNORE;
              if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
                link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
            }
          else
            einfo (_("%P%F: -shared not supported\n"));
          break;
        case OPTION_PIE:
          if (config.has_shared)
            {
              link_info.shared = TRUE;
              link_info.pie = TRUE;
            }
          else
            einfo (_("%P%F: -pie not supported\n"));
          break;
        case 'h':               /* Used on Solaris.  */
        case OPTION_SONAME:
          command_line.soname = optarg;
          break;
        case OPTION_SORT_COMMON:
          if (optarg == NULL
              || strcmp (optarg, N_("descending")) == 0)
            config.sort_common = sort_descending;
          else if (strcmp (optarg, N_("ascending")) == 0)
            config.sort_common = sort_ascending;
          else
            einfo (_("%P%F: invalid common section sorting option: %s\n"),
                   optarg);
          break;
        case OPTION_SORT_SECTION:
          if (strcmp (optarg, N_("name")) == 0)
            sort_section = by_name;
          else if (strcmp (optarg, N_("alignment")) == 0)
            sort_section = by_alignment;
          else
            einfo (_("%P%F: invalid section sorting option: %s\n"),
                   optarg);
          break;
        case OPTION_STATS:
          config.stats = TRUE;
          break;
        case OPTION_SYMBOLIC:
          command_line.symbolic = symbolic;
          break;
        case OPTION_SYMBOLIC_FUNCTIONS:
          command_line.symbolic = symbolic_functions;
          break;
        case 't':
          trace_files = TRUE;
          break;
        case 'T':
          previous_script_handle = saved_script_handle;
          ldfile_open_command_file (optarg);
          parser_input = input_script;
          yyparse ();
          previous_script_handle = NULL;
          break;
        case OPTION_DEFAULT_SCRIPT:
          command_line.default_script = optarg;
          break;
        case OPTION_SECTION_START:
          {
            char *optarg2;
            char *sec_name;
            int len;

            /* Check for <something>=<somthing>...  */
            optarg2 = strchr (optarg, '=');
            if (optarg2 == NULL)
              einfo (_("%P%F: invalid argument to option"
                       " \"--section-start\"\n"));

            optarg2++;

            /* So far so good.  Are all the args present?  */
            if ((*optarg == '\0') || (*optarg2 == '\0'))
              einfo (_("%P%F: missing argument(s) to option"
                       " \"--section-start\"\n"));

            /* We must copy the section name as set_section_start
               doesn't do it for us.  */
            len = optarg2 - optarg;
            sec_name = (char *) xmalloc (len);
            memcpy (sec_name, optarg, len - 1);
            sec_name[len - 1] = 0;

            /* Then set it...  */
            set_section_start (sec_name, optarg2);
          }
          break;
        case OPTION_TARGET_HELP:
          /* Mention any target specific options.  */
          ldemul_list_emulation_options (stdout);
          exit (0);
        case OPTION_TBSS:
          set_segment_start (".bss", optarg);
          break;
        case OPTION_TDATA:
          set_segment_start (".data", optarg);
          break;
        case OPTION_TTEXT:
          set_segment_start (".text", optarg);
          break;
        case OPTION_TTEXT_SEGMENT:
          set_segment_start (".text-segment", optarg);
          break;
        case OPTION_TRADITIONAL_FORMAT:
          link_info.traditional_format = TRUE;
          break;
        case OPTION_TASK_LINK:
          link_info.task_link = TRUE;
          /* Fall through - do an implied -r option.  */
        case OPTION_UR:
          link_info.relocatable = TRUE;
          config.build_constructors = TRUE;
          config.magic_demand_paged = FALSE;
          config.text_read_only = FALSE;
          input_flags.dynamic = FALSE;
          break;
        case 'u':
          ldlang_add_undef (optarg, TRUE);
          break;
        case OPTION_UNIQUE:
          if (optarg != NULL)
            lang_add_unique (optarg);
          else
            config.unique_orphan_sections = TRUE;
          break;
        case OPTION_VERBOSE:
          ldversion (1);
          version_printed = TRUE;
          verbose = TRUE;
          overflow_cutoff_limit = -2;
          if (optarg != NULL)
            {
              char *end;
              int level ATTRIBUTE_UNUSED = strtoul (optarg, &end, 0);
              if (*end)
                einfo (_("%P%F: invalid number `%s'\n"), optarg);
#ifdef ENABLE_PLUGINS
              report_plugin_symbols = level > 1;
#endif /* ENABLE_PLUGINS */
            }
          break;
        case 'v':
          ldversion (0);
          version_printed = TRUE;
          break;
        case 'V':
          ldversion (1);
          version_printed = TRUE;
          break;
        case OPTION_VERSION:
          ldversion (2);
          xexit (0);
          break;
        case OPTION_VERSION_SCRIPT:
          /* This option indicates a small script that only specifies
             version information.  Read it, but don't assume that
             we've seen a linker script.  */
          {
            FILE *hold_script_handle;

            hold_script_handle = saved_script_handle;
            ldfile_open_command_file (optarg);
            saved_script_handle = hold_script_handle;
            parser_input = input_version_script;
            yyparse ();
          }
          break;
        case OPTION_VERSION_EXPORTS_SECTION:
          /* This option records a version symbol to be applied to the
             symbols listed for export to be found in the object files
             .exports sections.  */
          command_line.version_exports_section = optarg;
          break;
        case OPTION_DYNAMIC_LIST_DATA:
          command_line.dynamic_list = dynamic_list_data;
          if (command_line.symbolic == symbolic)
            command_line.symbolic = symbolic_unset;
          break;
        case OPTION_DYNAMIC_LIST_CPP_TYPEINFO:
          lang_append_dynamic_list_cpp_typeinfo ();
          if (command_line.dynamic_list != dynamic_list_data)
            command_line.dynamic_list = dynamic_list;
          if (command_line.symbolic == symbolic)
            command_line.symbolic = symbolic_unset;
          break;
        case OPTION_DYNAMIC_LIST_CPP_NEW:
          lang_append_dynamic_list_cpp_new ();
          if (command_line.dynamic_list != dynamic_list_data)
            command_line.dynamic_list = dynamic_list;
          if (command_line.symbolic == symbolic)
            command_line.symbolic = symbolic_unset;
          break;
        case OPTION_DYNAMIC_LIST:
          /* This option indicates a small script that only specifies
             a dynamic list.  Read it, but don't assume that we've
             seen a linker script.  */
          {
            FILE *hold_script_handle;

            hold_script_handle = saved_script_handle;
            ldfile_open_command_file (optarg);
            saved_script_handle = hold_script_handle;
            parser_input = input_dynamic_list;
            yyparse ();
          }
          if (command_line.dynamic_list != dynamic_list_data)
            command_line.dynamic_list = dynamic_list;
          if (command_line.symbolic == symbolic)
            command_line.symbolic = symbolic_unset;
          break;
        case OPTION_WARN_COMMON:
          config.warn_common = TRUE;
          break;
        case OPTION_WARN_CONSTRUCTORS:
          config.warn_constructors = TRUE;
          break;
        case OPTION_WARN_FATAL:
          config.fatal_warnings = TRUE;
          break;
        case OPTION_NO_WARN_FATAL:
          config.fatal_warnings = FALSE;
          break;
        case OPTION_WARN_MULTIPLE_GP:
          config.warn_multiple_gp = TRUE;
          break;
        case OPTION_WARN_ONCE:
          config.warn_once = TRUE;
          break;
        case OPTION_WARN_SECTION_ALIGN:
          config.warn_section_align = TRUE;
          break;
        case OPTION_WARN_SHARED_TEXTREL:
          link_info.warn_shared_textrel = TRUE;
          break;
        case OPTION_WARN_ALTERNATE_EM:
          link_info.warn_alternate_em = TRUE;
          break;
        case OPTION_WHOLE_ARCHIVE:
          input_flags.whole_archive = TRUE;
          break;
        case OPTION_ADD_DT_NEEDED_FOR_DYNAMIC:
          input_flags.add_DT_NEEDED_for_dynamic = TRUE;
          break;
        case OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC:
          input_flags.add_DT_NEEDED_for_dynamic = FALSE;
          break;
        case OPTION_ADD_DT_NEEDED_FOR_REGULAR:
          input_flags.add_DT_NEEDED_for_regular = TRUE;
          break;
        case OPTION_NO_ADD_DT_NEEDED_FOR_REGULAR:
          input_flags.add_DT_NEEDED_for_regular = FALSE;
          break;
        case OPTION_WRAP:
          add_wrap (optarg);
          break;
        case OPTION_DISCARD_NONE:
          link_info.discard = discard_none;
          break;
        case 'X':
          link_info.discard = discard_l;
          break;
        case 'x':
          link_info.discard = discard_all;
          break;
        case 'Y':
          if (CONST_STRNEQ (optarg, "P,"))
            optarg += 2;
          if (default_dirlist != NULL)
            free (default_dirlist);
          default_dirlist = xstrdup (optarg);
          break;
        case 'y':
          add_ysym (optarg);
          break;
        case OPTION_SPARE_DYNAMIC_TAGS:
          link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
          break;
        case OPTION_SPLIT_BY_RELOC:
          if (optarg != NULL)
            config.split_by_reloc = strtoul (optarg, NULL, 0);
          else
            config.split_by_reloc = 32768;
          break;
        case OPTION_SPLIT_BY_FILE:
          if (optarg != NULL)
            config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
          else
            config.split_by_file = 1;
          break;
        case OPTION_CHECK_SECTIONS:
          command_line.check_section_addresses = 1;
          break;
        case OPTION_NO_CHECK_SECTIONS:
          command_line.check_section_addresses = 0;
          break;
        case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
          command_line.accept_unknown_input_arch = TRUE;
          break;
        case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
          command_line.accept_unknown_input_arch = FALSE;
          break;
        case '(':
          lang_enter_group ();
          ingroup++;
          break;
        case ')':
          if (! ingroup)
            einfo (_("%P%F: group ended before it began (--help for usage)\n"));

          lang_leave_group ();
          ingroup--;
          break;

        case OPTION_INIT:
          link_info.init_function = optarg;
          break;

        case OPTION_FINI:
          link_info.fini_function = optarg;
          break;

        case OPTION_REDUCE_MEMORY_OVERHEADS:
          link_info.reduce_memory_overheads = TRUE;
          if (config.hash_table_size == 0)
            config.hash_table_size = 1021;
          break;

        case OPTION_HASH_SIZE:
          {
            bfd_size_type new_size;

            new_size = strtoul (optarg, NULL, 0);
            if (new_size)
              config.hash_table_size = new_size;
            else
              einfo (_("%P%X: --hash-size needs a numeric argument\n"));
          }
          break;
        }
    }

  while (ingroup)
    {
      lang_leave_group ();
      ingroup--;
    }

  if (default_dirlist != NULL)
    {
      set_default_dirlist (default_dirlist);
      free (default_dirlist);
    }

  if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
    /* FIXME: Should we allow emulations a chance to set this ?  */
    link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;

  if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
    /* FIXME: Should we allow emulations a chance to set this ?  */
    link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;

  if (link_info.relocatable)
    {
      if (command_line.check_section_addresses < 0)
        command_line.check_section_addresses = 0;
      if (link_info.shared)
        einfo (_("%P%F: -r and -shared may not be used together\n"));
    }

  /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data,
     --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and
     --dynamic-list FILE.  -Bsymbolic and -Bsymbolic-functions are
     for shared libraries.  -Bsymbolic overrides all others and vice
     versa.  */
  switch (command_line.symbolic)
    {
    case symbolic_unset:
      break;
    case symbolic:
      /* -Bsymbolic is for shared library only.  */
      if (link_info.shared)
        {
          link_info.symbolic = TRUE;
          /* Should we free the unused memory?  */
          link_info.dynamic_list = NULL;
          command_line.dynamic_list = dynamic_list_unset;
        }
      break;
    case symbolic_functions:
      /* -Bsymbolic-functions is for shared library only.  */
      if (link_info.shared)
        command_line.dynamic_list = dynamic_list_data;
      break;
    }

  switch (command_line.dynamic_list)
    {
    case dynamic_list_unset:
      break;
    case dynamic_list_data:
      link_info.dynamic_data = TRUE;
    case dynamic_list:
      link_info.dynamic = TRUE;
      break;
    }

  if (! link_info.shared)
    {
      if (command_line.filter_shlib)
        einfo (_("%P%F: -F may not be used without -shared\n"));
      if (command_line.auxiliary_filters)
        einfo (_("%P%F: -f may not be used without -shared\n"));
    }

  if (! link_info.shared || link_info.pie)
    link_info.executable = TRUE;

  /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols).  I
     don't see how else this can be handled, since in this case we
     must preserve all externally visible symbols.  */
  if (link_info.relocatable && link_info.strip == strip_all)
    {
      link_info.strip = strip_debugger;
      if (link_info.discard == discard_sec_merge)
        link_info.discard = discard_all;
    }
}

/* Add the (colon-separated) elements of DIRLIST_PTR to the
   library search path.  */

static void
set_default_dirlist (char *dirlist_ptr)
{
  char *p;

  while (1)
    {
      p = strchr (dirlist_ptr, PATH_SEPARATOR);
      if (p != NULL)
        *p = '\0';
      if (*dirlist_ptr != '\0')
        ldfile_add_library_path (dirlist_ptr, TRUE);
      if (p == NULL)
        break;
      dirlist_ptr = p + 1;
    }
}

static void
set_section_start (char *sect, char *valstr)
{
  const char *end;
  bfd_vma val = bfd_scan_vma (valstr, &end, 16);
  if (*end)
    einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
  lang_section_start (sect, exp_intop (val), NULL);
}

static void
set_segment_start (const char *section, char *valstr)
{
  const char *name;
  const char *end;
  segment_type *seg;

  bfd_vma val = bfd_scan_vma (valstr, &end, 16);
  if (*end)
    einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
  /* If we already have an entry for this segment, update the existing
     value.  */
  name = section + 1;
  for (seg = segments; seg; seg = seg->next)
    if (strcmp (seg->name, name) == 0)
      {
        seg->value = val;
        return;
      }
  /* There was no existing value so we must create a new segment
     entry.  */
  seg = (segment_type *) stat_alloc (sizeof (*seg));
  seg->name = name;
  seg->value = val;
  seg->used = FALSE;
  /* Add it to the linked list of segments.  */
  seg->next = segments;
  segments = seg;
  /* Historically, -Ttext and friends set the base address of a
     particular section.  For backwards compatibility, we still do
     that.  If a SEGMENT_START directive is seen, the section address
     assignment will be disabled.  */
  lang_section_start (section, exp_intop (val), seg);
}

\f
/* Print help messages for the options.  */

static void
help (void)
{
  unsigned i;
  const char **targets, **pp;
  int len;

  printf (_("Usage: %s [options] file...\n"), program_name);

  printf (_("Options:\n"));
  for (i = 0; i < OPTION_COUNT; i++)
    {
      if (ld_options[i].doc != NULL)
        {
          bfd_boolean comma;
          unsigned j;

          printf ("  ");

          comma = FALSE;
          len = 2;

          j = i;
          do
            {
              if (ld_options[j].shortopt != '\0'
                  && ld_options[j].control != NO_HELP)
                {
                  printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
                  len += (comma ? 2 : 0) + 2;
                  if (ld_options[j].arg != NULL)
                    {
                      if (ld_options[j].opt.has_arg != optional_argument)
                        {
                          printf (" ");
                          ++len;
                        }
                      printf ("%s", _(ld_options[j].arg));
                      len += strlen (_(ld_options[j].arg));
                    }
                  comma = TRUE;
                }
              ++j;
            }
          while (j < OPTION_COUNT && ld_options[j].doc == NULL);

          j = i;
          do
            {
              if (ld_options[j].opt.name != NULL
                  && ld_options[j].control != NO_HELP)
                {
                  int two_dashes =
                    (ld_options[j].control == TWO_DASHES
                     || ld_options[j].control == EXACTLY_TWO_DASHES);

                  printf ("%s-%s%s",
                          comma ? ", " : "",
                          two_dashes ? "-" : "",
                          ld_options[j].opt.name);
                  len += ((comma ? 2 : 0)
                          + 1
                          + (two_dashes ? 1 : 0)
                          + strlen (ld_options[j].opt.name));
                  if (ld_options[j].arg != NULL)
                    {
                      printf (" %s", _(ld_options[j].arg));
                      len += 1 + strlen (_(ld_options[j].arg));
                    }
                  comma = TRUE;
                }
              ++j;
            }
          while (j < OPTION_COUNT && ld_options[j].doc == NULL);

          if (len >= 30)
            {
              printf ("\n");
              len = 0;
            }

          for (; len < 30; len++)
            putchar (' ');

          printf ("%s\n", _(ld_options[i].doc));
        }
    }
  printf (_("  @FILE"));
  for (len = strlen ("  @FILE"); len < 30; len++)
    putchar (' ');
  printf (_("Read options from FILE\n"));

  /* Note: Various tools (such as libtool) depend upon the
     format of the listings below - do not change them.  */
  /* xgettext:c-format */
  printf (_("%s: supported targets:"), program_name);
  targets = bfd_target_list ();
  for (pp = targets; *pp != NULL; pp++)
    printf (" %s", *pp);
  free (targets);
  printf ("\n");

  /* xgettext:c-format */
  printf (_("%s: supported emulations: "), program_name);
  ldemul_list_emulations (stdout);
  printf ("\n");

  /* xgettext:c-format */
  printf (_("%s: emulation specific options:\n"), program_name);
  ldemul_list_emulation_options (stdout);
  printf ("\n");

  if (REPORT_BUGS_TO[0])
    printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
}