https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77615
--- Comment #2 from Jan Bujak <jan.bujak at nokia dot com> --- (In reply to Markus Trippelsdorf from comment #1) > Please read: https://isocpp.org/wiki/faq/templates > > * Why can’t I separate the definition of my templates class from its > declaration and put it inside a .cpp file? Yes, I was aware of that, and it does make sense from a *technical* standpoint, but I reported the bug anyway because this is a potential landmine waiting to go off. You'll probably disagree, but for me changing the optimization level should *not* subtly change the behavior of the code without even a warning! If doing this is incorrect then the compiler should at least generate a warning instead of silently generating wrong code. The compiler knows that the template was defined in a header file, and it knows that the specialization was defined in a .cpp file, so it could tell the user that "hey, that probably won't work as you think it should; if you know what you're doing then feel free to silence this warning".
