2011-03-07  Benjamin Kosnik  <bkoz@redhat.com>
            Matthias Klose  <doko@ubuntu.com>
	    Jonathan Wakely  <redi@gcc.gnu.org>

	PR libstdc++/47145
	* acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Define.
	* configure.ac: Use it.
	* doc/Makefile.am (XSL_STYLE_DIR): Set at configure time.
	* configure: Regenerate.
	* doc/Makefile.in: Regenerate.


Co-Authored-By: Jonathan Wakely <redi@gcc.gnu.org>
Co-Authored-By: Matthias Klose <doko@ubuntu.com>

From-SVN: r170763