mono-2.0.1 forces me to have cairo compiled with the X use flag because of libgdiplus and I don't want the extra X stuff (I already have some for java)
mono-1.9.1 has a X use flag, which is now missing from the current version
Created attachment 174339 [details, diff]
change ebuild to only use and depend on libgdiplus if USE="X"
This patch to the ebuild works for me. Well, at least it builds okay; I haven't tested the resulting binaries much.
Patch works great for me on x64! Please include this in the official Mono ebuild - console-only-Mono on servers is really useful :-)
Fixed in 2.0.1-r1 with USE="minimal"