provide a simpler way to get to the headers

llvm-svn: 99843

clang/www/get_started.html

@@ -65,7 +65,7 @@ follows:</p>
       to find your C++ standard library headers.  If Clang cannot find your 
       system libstdc++ headers, please follow these instructions:</li>
   <ul>
-    <li>'<tt>touch empty.cpp; gcc -v empty.cpp -fsyntax-only</tt>' to get the
+    <li>'<tt>gcc -v -x c++ /dev/null -fsyntax-only</tt>' to get the
     path.</li>
     <li>Look for the comment "FIXME: temporary hack:
     hard-coded paths" in <tt>clang/lib/Frontend/InitHeaderSearch.cpp</tt> and