Why "second C linkage of overloaded function" is not allowed?

Question

I converted my C++ dll to C dll:

#ifdef __cplusplus
    extern "C" {
#endif

MY_EXPORT int  my_func();
MY_EXPORT void my_func(int n);

#ifdef __cplusplus
    }
#endif

Everything worked fine without extern C declaration. With this declaration I got

error C2733: second C linkage of overloaded function 'my_func' not allowed

Why is it not allowed to export overloaded functions from C-style dll ?

http://stackoverflow.com/questions/479207/function-overloading-in-c — Johnny Mopp, May 07 '14 at 12:53
C linkage implies no name-mangling. hence they would get the same name. — sp2danny, May 07 '14 at 14:20
Possible duplicate of [error C2733 second C linkage of overloaded function 'function' not allowed](http://stackoverflow.com/questions/7840203/error-c2733-second-c-linkage-of-overloaded-function-function-not-allowed) — rold2007, Feb 05 '16 at 19:39

score 9 · Accepted Answer · answered May 07 '14 at 12:53

9

C does not allow to overload functions. That is C does not support overloading. It is a feature of C++.

answered May 07 '14 at 12:53

Vlad from Moscow

1 Answers1