shiva::filesystem

This module simply makes a namespace alias and some preprocessing mandatory to use std::filesystem. This module is represented by a cmake interface library that facilitates its handling through other modules.

filesystem.hpp

#if __has_include(<experimental/filesystem>)
    #include <experimental/filesystem>
    namespace shiva
    {
        namespace fs = std::experimental::filesystem;
    }
#elif __has_include(<filesystem>)
    #include <filesystem>
    namespace shiva
    {
      namespace fs = std::filesystem;
    }
#endif

To manage it from side of cmake you have to do as follow:

if (LINUX)
    target_link_libraries(filesystem INTERFACE stdc++fs)
endif(LINUX)

if(APPLE)
    target_link_libraries(filesystem INTERFACE c++experimental)
endif(APPLE)