src_compile() byte-compiles the Emacs Lisp files: use emacs && elisp-comp etc/*.el src_install() installs the uncompiled files, but not the bytecode: elisp-install ${PN} etc/*.el ... which doesn't make much sense. Furthermore, the ebuilds should use elisp-compile instead of the deprecated elisp-comp, see bug 235442. Patch will follow.
Created attachment 163878 [details, diff] Patch for bigloo-2.7a_p2.ebuild
Created attachment 163880 [details, diff] Patch for bigloo-3.1a.ebuild Patch for 3.1a, should be applied to all ebuilds >=2.9a.
(In reply to comment #2) > Created an attachment (id=163880) [edit] > Patch for bigloo-3.1a.ebuild > > Patch for 3.1a, should be applied to all ebuilds >=2.9a. ... and to 3.1b in the gentoo-lisp overlay.
Fixed it myself, with permission from hkbst. Version in overlay fixed, too.