OpenGl-0.70 should work, but previous versions of the library may not work. Might be good to Depend this on a newer (not yet in the tree) version of dev-perl/OpenGL with: dev-perl/OpenGL-0.670.400::gentoo $ slic3r.pl Goto undefined subroutine &AutoLoader::AUTOLOAD at /usr/lib64/perl5/vendor_perl/5.22.2/x86_64-linux-thread-multi/OpenGL.pm line 6110. https://github.com/alexrj/Slic3r/issues/3600 --- Even tried a full perl-cleaner --reallyall just to make sure.
I've added OpenGL-0.70 to the tree (as dev-perl/OpenGL-0.700.0). Please test if that works and tell us here!