CLion filesystem linker problem even with -lstdc++fs - linker

Question

I've tried to use <filesystem> in my CLion project on Fedora 29 environment.
When compiling directly from terminal it works smoothly, but when i try to compile from CLion there is a Linker issue about filesystem. I'm not shure what else I can do. Any suggestions?
g++ (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2)
clang version 7.0.1
(Fedora 7.0.1-6.fc29)
Here is what i have already tried:
I've added the flag -lstdc++fs:
set(CMAKE_CXX_FLAGS -lstdc++fs)
but i didn't worked. I've verified if this flag is in use by:
set( CMAKE_VERBOSE_MAKEFILE on )
and it seems it is:
[ 50%] Building CXX object CMakeFiles/untitled.dir/main.cpp.o
/usr/bin/g++ -lstdc++fs -g -std=gnu++17 -o
CMakeFiles/untitled.dir/main.cpp.o -c
/home/patryk/CLionProjects/untitled/main.cpp
[100%] Linking CXX executable untitled
/home/patryk/clion-2018.3.4/bin/cmake/linux/bin/cmake -E
cmake_link_script CMakeFiles/untitled.dir/link.txt --verbose=1
/usr/bin/g++ -lstdc++fs -g CMakeFiles/untitled.dir/main.cpp.o -o
untitled
/usr/bin/ld: CMakeFiles/untitled.dir/main.cpp.o: in function
`std::filesystem::__cxx11::path::path<char [2],
std::filesystem::__cxx11::path>(char const (&) [2],
std::filesystem::__cxx11::path::format)':
/usr/include/c++/8/bits/fs_path.h:184: undefined reference to
`std::filesystem::__cxx11::path::_M_split_cmpts()'
collect2: error: ld returned 1 exit status
I've tried also to use clang compiler with exact same results.
main.cpp
#include <iostream>
#include <filesystem>
int main() {
std::filesystem::path p("D");
return 0;
}

Answer 1

CMake use target_link_libraries to add -l linker flags.
target_link_libraries(your_executable stdc++fs)
Why set(CMAKE_CXX_FLAGS -lstdc++fs) not working: -l option must be set after your source or object file.
c++ -lstdc++fs some_object.o -o executable # not working
c++ some_object.o -o executable -lstdc++fs # should work