Function elisp-comp has been deprecated, see bug 235442. elisp-compile should be used instead. Patch will follow.
Created attachment 163872 [details, diff] Proposed changes for gambit-4.1.2.ebuild Patch for 4.1.2, but please apply to all ebuilds of the package.
Created attachment 163874 [details, diff] Changes for files/50gambit-gentoo.el Furthermore, the Emacs site-init file doesn't set the load-path. Attached patch will fix it.
Fixed it myself, with permission from hkbst.
dev-scheme/gambit in the lisp overlay is still not fixed. Or rather, after the version in the main tree was fixed, a "bad" version was committed to the overlay. :-(
> dev-scheme/gambit in the lisp overlay is still not fixed. Removed, since it was older than the version in the main tree anyway.