* Makefile.am: Run "make dep-am".

        (AM_CPPFLAGS): New.
        (LIBDL): New.
        (ALL_MACHINES): Add cpu-plugin.lo.
        (ALL_MACHINES_CFILES): Add cpu-plugin.c.
        (BFD32_BACKENDS): Add plugin.lo.
        (BFD32_BACKENDS_CFILES): Add plugin.c.
        (libbfd_la_LIBADD): Add LIBDL
        * archures.c (bfd_architecture): Add bfd_arch_plugin.
        (bfd_plugin_arch): Declare.
        * bfd-in.h (BFD_SUPPORTS_PLUGINS): New.
        * bfd.c (bfd): Add plugin_data.
        * config.bfd: Handle the plugin target.
        * configure.in: Check for --enable-plugins.
        (LT_INIT): Use the dlopen option.
        * cpu-plugin.c: New.
        * plugin.c: New.
        * plugin.h: New.
        * targets.c (plugin_vec): Declare.
        (_bfd_target_vector): Add plugin_vec.
        * Makefile.in: Regenerate.
        * bfd-in2.h: Regenerate.
        * configure: Regenerate.
        * ar.c: Include plugin.h.
        (main): Handle the --plugin option.
        * nm.c: Include plugin.h.
        (OPTION_PLUGIN): New.
        (long_options): Add plugin.
        (main): Handle OPTION_PLUGIN.
        * NEWS: Mention  the new feature.
        * doc/binutils: Documement the new command line options.
        * configure.in: Check for --enable-plugins.
        * configure: Regenerate.

7 files changed, 125 insertions, 28 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index ff0e640ed0..12ea1d185b 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,16 @@
+2009-05-26  Rafael Avila de Espindola  <espindola@google.com>
+
+	* ar.c: Include plugin.h.
+	(main): Handle the --plugin option.
+	* nm.c: Include plugin.h.
+	(OPTION_PLUGIN): New.
+	(long_options): Add plugin.
+	(main): Handle OPTION_PLUGIN.
+	* NEWS: Mention  the new feature.
+	* doc/binutils: Documement the new command line options.
+	* configure.in: Check for --enable-plugins.
+	* configure: Regenerate.
+
 2009-05-26  Alan Modra  <amodra@bigpond.net.au>
 
 	* dep-in.sed: Output one filename per line with all lines having
diff --git a/binutils/NEWS b/binutils/NEWS
index 02d27c4151..7ce6d66a3c 100644
--- a/binutils/NEWS
+++ b/binutils/NEWS
@@ -1,5 +1,8 @@
 -*- text -*-
 
+* The plugin target has been added to bfd. It can load the same shared objects
+  used by gold and uses them to provide basic support for new file formats.
+
 * The verilog memory hex dump file format is now supported as an output format
   for objcopy.
 
diff --git a/binutils/ar.c b/binutils/ar.c
index 73ab1d46f0..d28419f4f1 100644
--- a/binutils/ar.c
+++ b/binutils/ar.c
@@ -1,6 +1,6 @@
 /* ar.c - Archive modify and extract.
    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
    Free Software Foundation, Inc.
 
    This file is part of GNU Binutils.
@@ -37,6 +37,7 @@
 #include "arsup.h"
 #include "filenames.h"
 #include "binemul.h"
+#include "plugin.h"
 #include <sys/stat.h>
 
 #ifdef __GO32___
@@ -230,8 +231,14 @@ usage (int help)
   if (! is_ranlib)
     {
       /* xgettext:c-format */
-      fprintf (s, _("Usage: %s [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...\n"),
-	       program_name);
+      const char * command_line =
+#if BFD_SUPPORTS_PLUGINS
+	_("Usage: %s [emulation options] [--plugin <name>] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...\n");
+#else
+	_("Usage: %s [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...\n");
+#endif
+      fprintf (s, command_line, program_name);
+
       /* xgettext:c-format */
       fprintf (s, _("       %s -M [<mri-script]\n"), program_name);
       fprintf (s, _(" commands:\n"));
@@ -259,7 +266,10 @@ usage (int help)
       fprintf (s, _("  [v]          - be verbose\n"));
       fprintf (s, _("  [V]          - display the version number\n"));
       fprintf (s, _("  @<file>      - read options from <file>\n"));
-
+#if BFD_SUPPORTS_PLUGINS
+      fprintf (s, _(" optional:\n"));
+      fprintf (s, _("  --plugin <p> - load the specified plugin\n"));
+#endif
       ar_emul_usage (s);
     }
   else
@@ -268,8 +278,11 @@ usage (int help)
       fprintf (s, _("Usage: %s [options] archive\n"), program_name);
       fprintf (s, _(" Generate an index to speed access to archives\n"));
       fprintf (s, _(" The options are:\n\
-  @<file>                      Read options from <file>\n\
-  -t                           Update the archive's symbol map timestamp\n\
+  @<file>                      Read options from <file>\n"
+#if BFD_SUPPORTS_PLUGINS
+"  --plugin <name>              Load the specified plugin\n"
+#endif
+"  -t                           Update the archive's symbol map timestamp\n\
   -h --help                    Print this help message\n\
   -v --version                 Print version information\n"));
     }
@@ -480,6 +493,22 @@ main (int argc, char **argv)
   arg_index = 1;
   arg_ptr = argv[arg_index];
 
+  if (strcmp (arg_ptr, "--plugin") == 0)
+    {
+#if BFD_SUPPORTS_PLUGINS
+      if (argc < 4)
+	usage (1);
+
+      bfd_plugin_set_plugin (argv[2]);
+
+      arg_index += 2;
+      arg_ptr = argv[arg_index];
+#else
+      fprintf (stderr, _("sorry - this program has been built without plugin support\n"));
+      xexit (1);
+#endif
+    }
+
   if (*arg_ptr == '-')
     {
       /* When the first option starts with '-' we support POSIX-compatible
diff --git a/binutils/configure b/binutils/configure
index d646ab6913..83ba316007 100755
--- a/binutils/configure
+++ b/binutils/configure
@@ -1002,6 +1002,7 @@ Optional Features:
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --disable-dependency-tracking  speeds up one-time build
   --enable-dependency-tracking   do not reject slow dependency extractors
+  --enable-plugins        linker plugins (defaults no)
   --disable-largefile     omit support for large files
   --enable-shared[=PKGS]
                           build shared libraries [default=yes]
@@ -4736,6 +4737,18 @@ _ACEOF
 
 
 
+# Check whether --enable-plugins or --disable-plugins was given.
+if test "${enable_plugins+set}" = set; then
+  enableval="$enable_plugins"
+  case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac
+else
+  plugins=no
+fi;
+
 case "${target}" in
   sparc-*-solaris*|i[3-7]86-*-solaris*)
     # See comment in bfd/configure.in for the reason for this test.
@@ -4743,7 +4756,9 @@ case "${target}" in
     # configure script so that the utilities in this directory agree
     # on the size of structures used to describe files.
     if test "${target}" = "${host}" -a "$enable_largefile" != 'yes'; then
-      enable_largefile="no"
+      if test "$plugins" = "no"; then
+        enable_largefile="no"
+      fi
     fi
     ;;
 esac
@@ -5518,13 +5533,13 @@ if test "${lt_cv_nm_interface+set}" = set; then
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:5521: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:5536: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:5524: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:5539: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:5527: output\"" >&5)
+  (eval echo "\"\$as_me:5542: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -6681,7 +6696,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6684 "configure"' > conftest.$ac_ext
+  echo '#line 6699 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7987,11 +8002,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7990: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8005: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7994: \$? = $ac_status" >&5
+   echo "$as_me:8009: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8326,11 +8341,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8329: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8344: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8333: \$? = $ac_status" >&5
+   echo "$as_me:8348: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8431,11 +8446,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8434: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8449: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8438: \$? = $ac_status" >&5
+   echo "$as_me:8453: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8486,11 +8501,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8489: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8504: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8493: \$? = $ac_status" >&5
+   echo "$as_me:8508: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -11298,7 +11313,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11301 "configure"
+#line 11316 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11394,7 +11409,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11397 "configure"
+#line 11412 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/binutils/configure.in b/binutils/configure.in
index e35b169be3..3fdb349fec 100644
--- a/binutils/configure.in
+++ b/binutils/configure.in
@@ -16,6 +16,15 @@ AC_PROG_CC
 AC_GNU_SOURCE
 AC_USE_SYSTEM_EXTENSIONS
 
+AC_ARG_ENABLE([plugins],
+AS_HELP_STRING([--enable-plugins], [linker plugins (defaults no)]),
+[case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac],
+[plugins=no])
+
 case "${target}" in
 changequote(,)dnl
   sparc-*-solaris*|i[3-7]86-*-solaris*)
@@ -25,7 +34,9 @@ changequote([,])dnl
     # configure script so that the utilities in this directory agree
     # on the size of structures used to describe files.
     if test "${target}" = "${host}" -a "$enable_largefile" != 'yes'; then
-      enable_largefile="no"
+      if test "$plugins" = "no"; then
+        enable_largefile="no"
+      fi
     fi
     ;;
 esac
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index cdec81fd06..39a3806174 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -170,7 +170,7 @@ in the section entitled ``GNU Free Documentation License''.
 @c man title ar create, modify, and extract from archives
 
 @smallexample
-ar [-]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] @var{archive} [@var{member}@dots{}]
+ar [@option{--plugin} @var{name}] [-]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] @var{archive} [@var{member}@dots{}]
 ar -M [ <mri-script ]
 @end smallexample
 
@@ -245,7 +245,7 @@ program.
 
 @smallexample
 @c man begin SYNOPSIS ar
-ar [@option{-X32_64}] [@option{-}]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] @var{archive} [@var{member}@dots{}]
+ar [@option{--plugin} @var{name}] [@option{-X32_64}] [@option{-}]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] @var{archive} [@var{member}@dots{}]
 @c man end
 @end smallexample
 
@@ -488,6 +488,11 @@ default for @sc{gnu} @command{ar}.  @command{ar} does not support any of the oth
 @samp{-X} options; in particular, it does not support @option{-X32}
 which is the default for AIX @command{ar}.
 
+The optional command line switch @option{--plugin} @var{name} causes
+@command{ar} to load the plugin called @var{name} which adds support
+for more file formats.  This option is only available if the toolchain
+has been built with plugin support enabled.
+
 @c man end
 
 @ignore
@@ -677,7 +682,8 @@ The @sc{gnu} linker @command{ld} is now described in a separate manual.
 
 @smallexample
 @c man begin SYNOPSIS nm
-nm [@option{-a}|@option{--debug-syms}] [@option{-g}|@option{--extern-only}]
+nm [@option{-a}|@option{--debug-syms}]
+   [@option{-g}|@option{--extern-only}][@option{--plugin} @var{name}]
    [@option{-B}] [@option{-C}|@option{--demangle}[=@var{style}]] [@option{-D}|@option{--dynamic}]
    [@option{-S}|@option{--print-size}] [@option{-s}|@option{--print-armap}]
    [@option{-A}|@option{-o}|@option{--print-file-name}][@option{--special-syms}]
@@ -859,6 +865,12 @@ either upper or lower case.
 @cindex external symbols
 Display only external symbols.
 
+@item --plugin @var{name}
+@cindex load plugin
+Load the plugin called @var{name} to add support for extra target
+types.  This option is only available if the toolchain has been built
+with plugin support enabled.
+
 @item -l
 @itemx --line-numbers
 @cindex symbol line numbers
diff --git a/binutils/nm.c b/binutils/nm.c
index e11568ab33..b03d1b6aad 100644
--- a/binutils/nm.c
+++ b/binutils/nm.c
@@ -1,6 +1,6 @@
 /* nm.c -- Describe symbol table of a rel file.
    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-   2001, 2002, 2003, 2004, 2005, 2007
+   2001, 2002, 2003, 2004, 2005, 2007, 2009
    Free Software Foundation, Inc.
 
    This file is part of GNU Binutils.
@@ -31,6 +31,7 @@
 #include "elf-bfd.h"
 #include "elf/common.h"
 #include "bucomm.h"
+#include "plugin.h"
 
 /* When sorting by size, we use this structure to hold the size and a
    pointer to the minisymbol.  */
@@ -178,6 +179,7 @@ static bfd *lineno_cache_bfd;
 static bfd *lineno_cache_rel_bfd;
 
 #define OPTION_TARGET 200
+#define OPTION_PLUGIN 201
 
 static struct option long_options[] =
 {
@@ -192,6 +194,7 @@ static struct option long_options[] =
   {"no-demangle", no_argument, &do_demangle, 0},
   {"no-sort", no_argument, &no_sort, 1},
   {"numeric-sort", no_argument, &sort_numerically, 1},
+  {"plugin", required_argument, 0, OPTION_PLUGIN},
   {"portability", no_argument, 0, 'P'},
   {"print-armap", no_argument, &print_armap, 1},
   {"print-file-name", no_argument, 0, 'o'},
@@ -237,8 +240,11 @@ usage (FILE *stream, int status)
   -o                     Same as -A\n\
   -p, --no-sort          Do not sort the symbols\n\
   -P, --portability      Same as --format=posix\n\
-  -r, --reverse-sort     Reverse the sense of the sort\n\
-  -S, --print-size       Print size of defined symbols\n\
+  -r, --reverse-sort     Reverse the sense of the sort\n"
+#if BFD_SUPPORTS_PLUGINS
+"      --plugin NAME      Load the specified plugin\n"
+#endif
+"  -S, --print-size       Print size of defined symbols\n\
   -s, --print-armap      Include index for symbols from archive members\n\
       --size-sort        Sort symbols by size\n\
       --special-syms     Include special symbols in the output\n\
@@ -1608,6 +1614,14 @@ main (int argc, char **argv)
 	  target = optarg;
 	  break;
 
+	case OPTION_PLUGIN:	/* --plugin */
+#if BFD_SUPPORTS_PLUGINS
+	  bfd_plugin_set_plugin (optarg);
+#else
+	  fatal (_("sorry - this program has been built without plugin support\n"));
+#endif
+	  break;
+
 	case 0:		/* A long option that just sets a flag.  */
 	  break;