Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system

[Stefan Monnier]

> Actually, I don't know any more if I'm asking for a reasonable thing.
> Should I expect to be able to _compile_ 32-bit apps on an x86_64
> system, or just _run_ them? The fact that almost none of the OS
> "devel" packages exist in 32-bit form suggests the latter.

I for one have compiled Emacs in 32bit-mode on an amd64 machine in two
difference circumstances:

- once on my home machine which is a Debian GNU/Linux x86 system (no amd64
  lib or compiler installed) with an amd64 kernel (mostly to get access to
  more than 3GB of ram, although a bigmem kernel would have done the trick
  as well).

- once on my work machine, which is running a version of Fedora for amd64
  and where some of the 32bit libs are indeed missing.  There's still plenty
  of libs to build Emacs.  The main reason there was to test the 32bit
  build, as well as to get a build which uses less memory.


        Stefan