Cannot Mix C Code

[nabioullinr]

I am trying to integrate C sources into the project (based on SimpleTemplate) but I am unable to call a C function from C++, since at runtime I receive an undefined reference error. I have tried to use both

/*C++ File*/
extern "C" {
#include "cheader.h"
}

and

/*cheader.h*/
extern "C" {
void func();
}

Any ideas? Could it be due to name mangling?