Asymptote-1.29 ebuild tries to emerge app-editors/vim when I set USE flag "vim-syntax" even though I have app-editors/gvim already installed. There is no reason to emerge vim when I already have gvim. This does not appear to be fixed in the ebuilds for newer versions of Asymptote. Reproducible: Always Steps to Reproduce: set USE flag to enable vim-syntax emerge asymptote Actual Results: Tries to emerge app-editors/vim Expected Results: Should recognize that app-editors/gvim provides equivalent functionality and reads syntax files from the same place. There are other problems with this syntax file (or my vim installation) but I think they are unrelated. It installs to /usr/share/vim/vimfiles/syntax but my vim and gvim can't seem to locate it unless I copy it to /usr/share/vim/vim71/syntax. Also, there is no ".asy" filetype in vim so you will have to manually load the syntax file, and it won't show up in the gvim GUI menu.
A fix for your problems is proposed in bug 193402, please try it and if maintainer does not react, Emacs team will handle those fixes.
Fixed with bug 193402
