Attached is an ebuild for the Zope ZAttachmentAttribute product. Please be aware that this is my first ebuild :). It uses zproduct.eclass. I've tested it on sparc64 and x86.
Created attachment 28784 [details] zattachmentattribute-2.0.ebuild
fixed in portage as 2.13 version. ~x86 only. please report back any encountered problems.