GCC 8 is not able to finish compilation when `-Werror` flag is present in CMakeLists.txt [build log of Fedora 28 compilation](https://kojipkgs.fedoraproject.org//work/tasks/7048/25367048/build.log) [Full logs list](https://koji.fedoraproject.org/koji/taskinfo?taskID=25367048) Note: compilation has been runned with flags ``` -DWITH_TESTS=OFF \ -DWITH_XC_HTTP=ON \ -DWITH_XC_AUTOTYPE=ON \ -DWITH_XC_YUBIKEY=ON \ -DCMAKE_BUILD_TYPE=Release ```