Created attachment 515032 [details] build.log Please see attached log.
equery l poppler
* Searching for poppler ... [IP-] [ ] app-text/poppler-0.62.0-r1:0/73
This is caused by mixing arch with ~arch packages then. Upgrade to >=cups-filters-1.17.9 to fix it. *** This bug has been marked as a duplicate of bug 629708 ***