re PR libstdc++/64560 (building libstdc++ with -fno-rtti fails in new cxx11-shim-facets.cc file)

	PR libstdc++/64560
	* src/c++11/cxx11-shim_facets.cc (locale::facet::_M_sso_shim): Check
	for RTTI support.

From-SVN: r219495

libstdc++-v3/ChangeLog

+2015-01-12  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/64560
+	* src/c++11/cxx11-shim_facets.cc (locale::facet::_M_sso_shim): Check
+	for RTTI support.
+
 2015-01-10  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* doc/xml/manual/parallel_mode.xml: Update for libgomp being

libstdc++-v3/src/c++11/cxx11-shim_facets.cc

@@ -768,9 +768,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   {
     using namespace __facet_shims;
 
+#if __cpp_rtti
     // If this is already a shim just use its underlying facet.
     if (auto* p = dynamic_cast<const __shim*>(this))
       return p->_M_get();
+#endif
 
     if (which == &numpunct<char>::id)
       return new numpunct_shim<char>{this};