Gunnar Roth wrote: > IMHO calling conventions ( like _stdcall and _cdecl ) are about > parameter cleanup and ordering and exnrnal c linkage is about how the > function name is written ( mangled or not). I can see that calling > convention could make problems with pthread, but cannot see what extern > "C" should have to to with that. > please enligthen me. To quote my first source in the initial post: "While most C++ implementations do NOT use calling conventions compatible with C for normal member functions, many DO for static member functions. Some, on the other hand, don't, and there's no reason they should. (That is, ANSI C++ says they needn't.)" Its just that a program compiled in C++ mode doesn't need to follow C calling conventions (especially cleanup is important here) according to the standard. Since extern "C" should declare default C calling conventions within C++ code, it has something to do with it, I guess ;) Greetings, Sascha Volkenandt