Posted by ravas on Feb 12, 2016; 6:31am
URL: https://forum.librecad.org/dev-environment-setup-and-usage-tp5712883p5712959.html

I eliminated some warnings;
all those remaining are the override warnings
which can be suppressed with -Wno-inconsistent-missing-override.

Also it turns out there is a button in Qt creator to suppress warnings (like CONFIG += warn_off);
it's the triangle with the exclamation point in the issues tab.