cflow-1.2.ebuild doesn't byte-compile its Emacs Lisp files and uses the wrong eclass function (elisp-site-file-install instead of elisp-install) to install its Emacs support file. A patch and a proper site-init file for Emacs will follow.
Created attachment 138516 [details, diff] Proposed changes for cflow-1.2.ebuild Please note that Emacs support in the package's build system is unconditionally disabled; the compile and install functions of elisp-common.eclass are used instead. This is easier than tweaking the package's build system to honour the emacs USE flag. elisp-site-regen should also be called in postrm.
Created attachment 138518 [details] Emacs site-init file, goes to files/50cflow-gentoo.el
looks gode. Go ahead and commit or wait until January (sorry, won't have time before the new year). thanks anyway! :)
Fixed in -r1.