##A.hh
template<class T> void func(T t) {}
template<> void func<int>(int t) {}
void func2();
##A.cpp
void func2() {}
##main.cpp
func("hello");
func(int());
The error I get is: error LNK2005: "void __cdecl func(int)" (??$func@H@@YAXH@Z) already defined in A.obj, one or more multiply defined symbols found
Is a function template specialization not treated as a normal function template? It looks like it will be in the objective file for A.
As template<> void func<int>(int t) {} is a function overload rather than a function template (i.e., all types are known at the point of definition so it is no longer a template), it must be marked as inline or defined in a .cpp file to avoid multiple definition errors, just as with any other function definition.
The problem is as follows: full template specialization is no more a template, it's more like an ordinary function. So you should act accordingly:
either put definition of func<int>() in cpp file
or make it inline
