As previous maintainer of popt I'll try to test it and eventually submit an updated ebuild if there are no devel for take care of this.
Created attachment 135989 [details] updated popt-1.12 ebuild Tested on ~x86 x86 and ~amd64. Dropped some path not more needed. Updated home page. Dropped stable keywords, maintained as ~archs as it seems API and ABI compatible.
rpm-5.0 will depend on a later version of popt (1.13 to be precise) when it will come out.
now in the tree
popt-1.13 has a couple useful fixes and will be released in the next week or so.