>> I've made attached quick hack patch for texinfo.tex. The
>> following command [to compile the lilypond documentation] does
>> not occur `Undefined control sequence.' with the patch.
>
> Thanks for working on this. This patch uses native LuaTeX support
> for Unicode. If we wanted to support this in texinfo.tex, it should
> probably be optional.
Rather not.
> Maybe whether a "@documentencoding UTF-8" line is given should affect
> whether native Unicode is used by default.
This is the way to go IMHO.
> Are these changes likely to work for most LuaTeX installations, e.g.
> will luaotfload.sty exist for everyone?
I think so, yes. `luaotfload.sty' is an essential part of the luatex
infrastructure.
Werner