dev-libs/quantlib could have better Emacs support. Patch will follow.
Created attachment 124148 [details, diff] Proposed patch for quantlib-0.3.14.ebuild This makes use of elisp-common.eclass and installs a proper site-init file for Emacs.
Created attachment 124149 [details] files/50quantlib-gentoo.el Emacs site-init file for quantlib.
Committed as -r1, as discussed with dev-zero on irc.