The situation with std::filesystem in C++ is a bit awkward, since different compilers require different compilation flags (-lstdc++fs, -lc++fs, or none).

This project provides a cmake file that adds an interface target to which you can link against. It will automatically set the right flags.

Copy the contents of cmake/ to your project.

Add find_package(StdFileSystem) to get the std::filesystem target.

Link your target via target_link_libraries(my_target std::filesystem).

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)

find_package(StdFileSystem REQUIRED)

add_executable(main main.cc)

target_link_libraries(main std::filesystem)

Will only find std::filesystem, not std::experimental::filesystem.