https://bugs.winehq.org/show_bug.cgi?id=31836
--- Comment #45 from Alexandre Julliard julliard@winehq.org --- (In reply to Rafał Mużyło from comment #43)
The catch is next to noone will notice such notice in the flood of the configure messages, unless this check will only set a var and the warning is only printed at the conclusion of the configure process.
That's how it's done for all such warnings. Check the WINE_NOTICE macro.