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Compiler Error C2733

second C linkage of overloaded function 'function' not allowed

More than one overloaded function is declared with C linkage. When using C linkage, only one form of a specified function can be external. Since overloaded functions have the same undecorated name, they cannot be used with C programs. The following sample generates C2733:

// C2733.cpp
extern "C" {
   void F1(int);

extern "C" {
   void F1(void);
}   // C2733, delete one of the external linkages to resolve

int main() {