Created attachment 432492 [details] emerge --info dev-qt/qtxmlpatterns is required but not declared (not sure on required version but 4.8.7 works). Any 5.x version does not help.
Can you please attach a build.log for a failed build showing the missing dependency?
author  Amy Winston <amynka@gentoo.org> 2016-05-14 14:32:02 (GMT) committer Amy Winston <amynka@gentoo.org> 2016-05-14 14:32:02 (GMT) commit db696dacc9188d710d8ad1484d0e1a0e8a91216f media-gfx/meshlab: add missing dep bug #581496 Thanks Amy