Hm, not sure why, but the build succeeds despite the error: https://build.opensuse.org/package/show/openSUSE:Factory/liblogging However, I have a patched version here: https://build.opensuse.org/package/show/home:tsaupe:branches:openSUSE:Factory:Staging:Gcc7/liblogging The mentioned warnings are gone, but there are some more warnings (though apparently not fatal).