* 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.

1 files changed, 32 insertions, 3 deletions

diff --git a/bfd/configure.in b/bfd/configure.in
index 81255dd..c7dd581 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -23,6 +23,27 @@ AC_PROG_CC
 AC_GNU_SOURCE
 AC_USE_SYSTEM_EXTENSIONS
 
+LT_INIT([dlopen])
+
+AC_ARG_ENABLE([plugins],
+AS_HELP_STRING([--enable-plugins], [linker plugins (defaults no)]),
+[case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac],
+[plugins=no])
+
+AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
+
+if test "$plugins" = "yes"; then
+  if test "$enable_dlopen" != "yes" ; then
+    AC_MSG_ERROR([
+      Building BFD with plugin support requires a host that supports -ldl.])
+  fi
+  enable_targets="$enable_targets plugin"
+fi
+
 case "${target}" in
 changequote(,)dnl
   sparc-*-solaris*|i[3-7]86-*-solaris*)
@@ -34,15 +55,15 @@ changequote([,])dnl
     # large-file support through the --enable-largefile switch, disable
     # large-file support in favor of procfs support.
     if test "${target}" = "${host}" -a "$enable_largefile" != 'yes'; then
-      enable_largefile="no"
+      if test "$plugins" = "no"; then
+        enable_largefile="no"
+      fi
     fi
     ;;
 esac
 
 AC_SYS_LARGEFILE
 
-LT_INIT
-
 AC_ARG_ENABLE(64-bit-bfd,
 [  --enable-64-bit-bfd     64-bit support (on hosts with narrower word sizes)],
 [case "${enableval}" in
@@ -871,6 +892,7 @@ do
     pef_vec)                    tb="$tb pef.lo" ;;
     pef_xlib_vec)               tb="$tb pef.lo" ;;
     pdp11_aout_vec)		tb="$tb pdp11.lo" ;;
+    plugin_vec)                 tb="$tb plugin.lo" ;;
     pmac_xcoff_vec)		tb="$tb coff-rs6000.lo xcofflink.lo" ;;
     ppcboot_vec)		tb="$tb ppcboot.lo" ;;
     riscix_vec)			tb="$tb aout32.lo riscix.lo" ;;
@@ -1018,6 +1040,13 @@ AC_SUBST(bfd_backends)
 AC_SUBST(bfd_machines)
 AC_SUBST(bfd_default_target_size)
 
+if test "$plugins" = "yes"; then
+  supports_plugins=1
+else
+  supports_plugins=0
+fi
+AC_SUBST(supports_plugins)
+
 # Determine the host dependant file_ptr a.k.a. off_t type.  In order
 # prefer: off64_t - if ftello64 and fseeko64, off_t - if ftello and
 # fseeko, long.  This assumes that sizeof off_t is .ge. sizeof long.