Will binaries built in 10.6 still run in 10.5?

[Ryan Schmidt]

On Oct 4, 2010, at 13:39, Harry van der Wolf wrote:

> Did you check all libraries/binaries for their architecture with lipo -info <blahblah>? 
> GCC 4.2.1 is designed to build ppc64 for ppc architecture. I assume that part of your libs/bins is ppc64 instead of ppc. 

..................ppc64 and ppc are two different architectures. If you request ppc there's no way you'll get ppc64 instead, or vice versa. gcc 4.2.1 builds all four Mac OS X architectures -- ppc, ppc64, i386, x86_64 -- just fine, as far as I know. If you have evidence to the contrary, please provide.