Boost C++ Application Development Cookbook - Second Edition

How to do it...

The code for this recipe consists of two parts. The first part is the library itself. The second part is the code that uses that library. Both parts use the same header, in which the library methods are declared. Managing symbol visibility in a portable way using Boost is simple and can be done using the following steps:

1. In the header file, we need definitions from the following header file:

#include <boost/config.hpp> 

2. The following code must also be added to the header file:

#if defined(MY_LIBRARY_LINK_DYNAMIC)#   if defined(MY_LIBRARY_COMPILATION)#       define MY_LIBRARY_API BOOST_SYMBOL_EXPORT#   else#       define MY_LIBRARY_API BOOST_SYMBOL_IMPORT#   endif#else#   define MY_LIBRARY_API#endif

3. Now, all the declarations must use the ...