Do GCC, MSVC, or Clang, or some combination support setting linkage to default to C?
I have a large mixed C/C++ project, and while it's easy and logical to export symbols in the C++ sources with C linkage, those same sources are assuming the stuff in the rest of the project are under C++ linkage.
The current situation requires me to explicitly wrap anything the C sources use that is defined in the C++ sources and everything the C++ sources use from the C sources with extern "C++".
To top things off, I can't put extern "C" around entire source or header files, as the actual C++ stuff will then complain. (Such as from #include <memory> or templates I've defined.)
The standard pattern in a header file is:
#ifdef __cplusplus
// C++ stuff
extern "C" {
#endif
// C/C++ stuff
#ifdef __cplusplus
}
#endif
I'm not sure you've got any other options. The C/C++ stuff must be declared with C linkage everywhere. The C++-specific stuff must be declared with C++ linkage everywhere.