Maru - a tiny self-hosting lisp dialect

[Attila Lendvai]

>
> How hard would it be to do this in LLVM, I wonder?
>

i've done that already, and with LLVM the self-hosting is about 3000 kLoC,
although i'm looking into new features that would hopefully allow
shrinking/simplifying the codebase back a little. mostly by separating the
code that is strictly needed for the bootstrap process from the
ever-growing set up libs and utils that get added for other tests and
actual uses of the language.

most of the extra lines are needed because the LLVM IR has a strict type
system that had to be accommodated when compiling e.g. FFI calls and such.
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