Created attachment 380356 [details] build log It seems that somehow libtool-2.4.2-r1 became unmasked in prefix, though it still appears to be masked here: http://packages.gentoo.org/package/sys-devel/libtool The bootstrap fails when it tries to emerge libtool-2.4.2-r1. The simplest solution is to (re-)mask it, but I am also attaching a patch that seems to fix libtool-2.4.2-r1.
Created attachment 380358 [details, diff] fix for libtool-2.4.2-r1
Created attachment 380360 [details] emerge --info
Created attachment 380366 [details, diff] fix for libtool-2.4.2-r1
Thank you for the patch, but I do have another solution on the road already.
Tested on AIX: http://prefix.gentooexperimental.org:8000/prefix-tree/rev/9a0cd9dbe663