These facts combine to mean that, quite possibly, Lua is the most
portable language in existence. Do people agree with this statement?
If not, which other languages approach Lua in terms of portability?
Well, the majority opinion would be naturally a big yes here, especially when you factor in the lean and mean aspect.
The gotcha is that you will need to select a set of batteries to complement the small set of built-in libraries (this comes directly out of C89 as an 'abstract platform'). E.g, LuaFileSystem. For POSIX platforms luaposix is a big win (you won't need LuaFileSystem and it gives you all the usual yummies) and it has a very configurable build. It's possible to build a single executable which carries the extra batteries.
