+ set(LYX_CXX_FLAGS "-Wall -Wunused-parameter ${LYX_GCC11_MODE}")
+ if(LYX_CXX_FLAGS MATCHES "\\+\\+(14|11|98)")
+ # Thanks to Brad King <brad.king@kitware.com>
+ # for the pointer to https://cmake.org/cmake/help/v3.6/variable/CMAKE_CXX_STANDARD.html
+ # This allows us to use QT5.7 with recent g++ (version >= 4.9) compilers
+ # and still use our own c++ extension tests
+ set(CMAKE_CXX_STANDARD ${CMAKE_MATCH_1})
+ message(STATUS "CMAKE_CXX_STANDARD set to ${CMAKE_CXX_STANDARD}")
+ endif()