Re: 32-bit MinGW build with JIT

[Eli Zaretskii]

> Date: Thu, 16 Aug 2018 17:09:15 +0300
> From: Eli Zaretskii <address@hidden>
> Cc: address@hidden
> 
> Anyway, what I wanted to tell is that as of now, it is very hard to
> debug these problems.  All the libjit types are "incomplete" as far as
> GDB is concerned, there are no facilities to display libjit types and
> values in human-readable form, C-level backtraces show ?? when a JIT
> compiled function is called, etc.  I didn't yet succeed in
> establishing whether the invalid Lisp arguments for Ffuncall are
> already invalid when we compile the function, or get corrupted as part
> of compilation.
> 
> I think we need to upgrade our debugging facilities, including adding
> commands to .gdbinit, as part of working on this branch.

Oh, and one more thing: I think we need a Lisp variable to disable JIT
even if it has been compiled in.  This should be important for
debugging and testing, if nothing else.