Applied Steffen's patch from FS #1287 and reverted changes of r7454 to m4/cxx0x_variadic.m4

[[Imported from SVN: r7472]]

dune/common/debugallocator.hh

@@ -271,7 +271,7 @@ namespace Dune
     {
       ::new((void*)p)T(val);
     }
-#if HAVE_VARIADIC_TEMPLATES || DOXYGEN
+#if ( HAVE_VARIADIC_TEMPLATES && HAVE_RVALUE_REFERENCES ) || DOXYGEN
     //! construct an object of type T from variadic parameters
     //! \note works only with newer C++ compilers
     template<typename ... _Args>

m4/cxx0x_variadic.m4

@@ -18,9 +18,9 @@ AC_DEFUN([VARIADIC_TEMPLATES_CHECK],[
         }
 
         template<typename T1, typename... T>
-        int add_ints(T1 t1, T&&... t)
+        int add_ints(T1 t1, T... t)
         {
-          return t1 + add_ints(std::forward<T>(t)...);
+          return t1 + add_ints(t...);
         }], 
         [
           assert( 5 == add_ints(9,3,-5,-2) );