"The current version is 6.0, posted 14 Sep 2008" (almost five years ago).
Created attachment 403538 [details] dev-lang/ucblogo-6.0 ebuild
Created attachment 403540 [details] ucblogo-6.0-wx.patch
Created attachment 403542 [details] ucblogo-6.0-texi.patch
Created attachment 403544 [details] ucblogo-6.0-destdir.patch
Created attachment 403546 [details, diff] ucblogo-6.0-no-libtermcap.patch
=dev-lang/ucblogo-6.0 builds and runs fine here on amd64 with the attached ebuild and patches.
ucblogo-6.0 pushed to the tree https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=42b838d65c9698afa3176c15dbed24397c30c42a