cygwin caveat

From-SVN: r67476

gcc/doc/install.texi

@@ -3166,12 +3166,15 @@ respects, this target is the same as the
 @end html
 @heading @anchor{windows}Microsoft Windows (32-bit)
 
-A port of GCC 2.95.x is included with the
+A port of GCC 2.95.2 and 3.x is included with the
 @uref{http://www.cygwin.com/,,Cygwin environment}.
 
 Current (as of early 2001) snapshots of GCC will build under Cygwin
 without modification.
 
+GCC does not currently build with Microsoft's C++ compiler and there
+are no plans to make it do so.
+
 @html
 <hr />
 @end html