How to build i386 rpms on x86_64?

[Patrick]

On Mon, 2007-11-19 at 11:56 -0600, Paul Johnson wrote:
[snip]
> In case people who know "how to" are reading, here's the error that
> ends the compile.  As I said, I've seen plenty of people posting about
> this, but there's no obvious fix for me--some people suggest patches
> to the libraries that are being used, but I don't see clear consensus
> on the "right" approach.
> gmake[4]: *** Waiting for unfinished jobs....

Not an expert on this at all but have you tried building Firefox with
_smp_mflags -j1? To set -j1 add this to your ~/.rpmmacros file:

%_smp_mflags  -j1

Regards,
Patrick