------- Comment #3 from redi at gcc dot gnu dot org 2010-06-15 23:18 ------- It's true that your specialization is only a declaration, but this would be a definition too:
template<> const int MyTraits<int>::kValue = 1; It's not true that the declaration has no purpose, it tells the compiler there is an explicit specialization and the primary template should not be implicitly instantiated. That's exactly what's needed if an explicit specialization is defined in another translation unit, otherwise you get multiple definitions. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44552
