* plugins.m4: New.

* aclocal.m4: Include ../config/plugins.m4.
        * configure.in: Use AC_PLUGINS.
        * configure: Regenerate.
        * Makefile.in: Regenerate.
        * doc/Makefile.in: Regenerate.

config/ChangeLog

@@ -1,3 +1,7 @@
+2009-05-26  Rafael Avila de Espindola  <espindola@google.com>
+
+	* plugins.m4: New.
+
 2009-05-12  Alexandre Oliva  <aoliva@redhat.com>
 
 	* multi.m4: Save CXX, GFORTRAN and GCJ in config.status.

config/plugins.m4

@@ -0,0 +1,11 @@
+AC_DEFUN([AC_PLUGINS],
+[
+AC_ARG_ENABLE([plugins],
+AS_HELP_STRING([--enable-plugins], [Enable support for plugins (defaults no)]),
+[case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac],
+[plugins=no])
+])