Comment # 3 on bug 1201070 from Alois Wohlschlager

(In reply to Mathias Homann from comment #2)
> https://build.opensuse.org/request/show/986167
> 
> Looks as if its another FORTIFY_SOURCE=3 issue.

The culprit appears to be that the build files add a conflicting
_FORTIFY_SOURCE=2 on their own.