CHECK_CXX_SOURCE_COMPILES("#include <unordered_map>
                               int main() {
                                 std::tr1::unordered_map<int, int> map;
                                 return 0;
                               }"
                              HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE)

ELSE (HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE)

ENDIF (HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE)