mirror of
https://github.com/libretro/RetroArch
synced 2024-12-27 06:25:59 +00:00
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
//this file checks in order to ensure that right version of std::filesystem is returned for the version of c++
|
|
|
|
// We haven't checked which filesystem to include yet
|
|
#ifndef INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
|
|
|
|
// Check for feature test macro for <filesystem>
|
|
# if defined(__cpp_lib_filesystem)
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
|
|
|
|
// Check for feature test macro for <experimental/filesystem>
|
|
# elif defined(__cpp_lib_experimental_filesystem)
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
|
|
|
|
// We can't check if headers exist...
|
|
// Let's assume experimental to be safe
|
|
# elif !defined(__has_include)
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
|
|
|
|
// Check if the header "<filesystem>" exists
|
|
# elif __has_include(<filesystem>)
|
|
|
|
// If we're compiling on Visual Studio and are not compiling with C++17, we need to use experimental
|
|
# ifdef _MSC_VER
|
|
|
|
// Check and include header that defines "_HAS_CXX17"
|
|
# if __has_include(<yvals_core.h>)
|
|
# include <yvals_core.h>
|
|
|
|
// Check for enabled C++17 support
|
|
# if defined(_HAS_CXX17) && _HAS_CXX17
|
|
// We're using C++17, so let's use the normal version
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
|
|
# endif
|
|
# endif
|
|
|
|
// If the marco isn't defined yet, that means any of the other VS specific checks failed, so we need to use experimental
|
|
# ifndef INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
|
|
# endif
|
|
|
|
// Not on Visual Studio. Let's use the normal version
|
|
# else // #ifdef _MSC_VER
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
|
|
# endif
|
|
|
|
// Check if the header "<filesystem>" exists
|
|
# elif __has_include(<experimental/filesystem>)
|
|
# define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
|
|
|
|
// Fail if neither header is available with a nice error message
|
|
# else
|
|
# error Could not find system header "<filesystem>" or "<experimental/filesystem>"
|
|
# endif
|
|
|
|
// We priously determined that we need the experimental version
|
|
# if INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
|
|
// Include it
|
|
# include <experimental/filesystem>
|
|
// We need the alias from std::experimental::filesystem to std::filesystem
|
|
namespace std {
|
|
namespace filesystem = experimental::filesystem;
|
|
}
|
|
# else // We have a decent compiler and can use the normal version
|
|
# include <filesystem>// Include it
|
|
# endif
|
|
#endif // #ifndef INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
|