Will binaries built in 10.6 still run in 10.5?

[Jeremy Huddleston]

On Oct 4, 2010, at 04:38, Harry van der Wolf wrote:
> I simply build with gcc 4.0.1 for i386/ppc and with 4.2.x for 64bit (I also
> build for other OS projects). I have seen many, many errors in all kind of
> libraries/binaries when trying to build 32bit in OSX using 4.2.1, so I just
> stick to 4.0.1. I assume the OSX devs would not use 4.0.1 for 32bit if they
> could use 4.2.1. Why put 2 gcc versions in XCode if you could handle it with
> one. So I assume it's for a good reason.

gcc-4.2 is the default compiler in Snow Leopard for all supported architectures.  One of my systems is 32bit, and I've never had a problem using it.  What problems are you seeing when using gcc-4.2.1?