C++ Cross Platform Dynamic Libraries; Linux and Windows

Question

I need some help on writing cross-platform code; not an application, but a library.

I am creating a library both static and dynamic with most of the development done

Answer 1

Maybe it's better if you Add extern "C" !!!,

/* file CMakeLists.txt */

 SET (LIB_TYPE SHARED)
 ADD_LIBRARY(MyLibrary ${LIB_TYPE} MyLibrary.h)

/* file MyLibrary.h */

#if defined(_WIN32) || defined(__WIN32__)
#  if defined(MyLibrary_EXPORTS) // add by CMake 
#    define  MYLIB_EXPORT extern "C" __declspec(dllexport)
#  else
#    define  MYLIB_EXPORT extern "C" __declspec(dllimport)
#  endif // MyLibrary_EXPORTS
#elif defined(linux) || defined(__linux)
# define MYLIB_EXPORT
#endif

MYLIB_EXPORT inline int Function(int a) {
    return a;
}