what is -fno-elide-constructors and how to use in cmake

about -fno-elide-constructors:

https://blog.csdn.net/XiyouLinux_Kangyijie/article/details/78939291

https://www.cnblogs.com/xkfz007/archive/2012/07/21/2602110.html

how to use in cmake:

SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-elide-constructors")