Installed. I think libg++ has been obsolete for sufficiently long that keeping it here might cause more confusion than it's beneficial.
Gerald Index: extensions.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/extensions.html,v retrieving revision 1.46 diff -u -r1.46 extensions.html --- extensions.html 20 Nov 2010 15:15:51 -0000 1.46 +++ extensions.html 10 Sep 2011 20:53:22 -0000 @@ -57,10 +57,5 @@ apply to current GCC sources but are of historical interest or may be helpful to consult for future development.</p> -<h2><a name="libgxx"></a><a href="http://www.suse.de/~mh/libgxx/">Libg++</a></h2> - -<p><code>Libg++</code>, the GNU C++ library, has been superseded by -<code>libstdc++</code>.</p> - </body> </html>