libffi is needed to install gnustep(-base), which is a dependency of windowmaker-0.91.0-r1
when using USE="gnustep".
Created attachment 44582 [details]
fixed, thanks corsair!
stick a fork in it!
problem is still present...
adding "--disable-multilib" to configure solves this problem.
Fixed in CVS. (libffi-3.4.3)