minipatch will follow, as per http://mail.gnome.org/archives/gtkglext-list/2006-April/msg00016.html gtkglextmm-1.2.0 aclocal macro isn't perfect, resulting in a warning when emerging any package that uses aclocal.
Shrug, tell upstream to fix it?
Created attachment 95484 [details, diff] gtkglextmm-1.2.0-aclocal.patch minipatch (to apply in "${WORKDIR}/${S}" with an epatch) to avoid the nasty warning to show every time aclocal is used (in ANY package emerge using aclocal).
Is already fixed upstream, I've put here cause I know that gtkglextmm isn't a package udating every month and this warning is a bit boring..... feel free to close if you don't think so.