As said in bugzilla, I am against this change. If you want to use -Wconversion-extra, just add it to your favorite options.
-Wconversion-extra is extremely noisy and -Wextra has been stable for some years. IMO we cannot afford to have people complaining about the change. If you really want a synthetic option, why not a new one -Wnoisy (or -Weally-all, …) which implies '-Wall -Wextra -Wconversion-extra …’? Dominique PS. Who wants Warning: Conversion from 'REAL(4)' to 'REAL(8)' at (1) [-Wconversion-extra] even if may allow to detect things such as ‘pi8=acos(-1.0)’?
