Undefined reference error with new filesystem library and clang++7

Question

I was trying to out the new filesystem STL library, but for some reason am getting errors. The Clang++7 website indicates that it should support th

Answer 1

filesystem is still experimental and requires an extra library.

If you are using libstdc++, link with -lstdc++fs (or target_link_libraries(${PROJECT_NAME} stdc++fs)).

For libc++, use -lc++fs (similar for the CMake command).