(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.