Compiling as 32bit on MacOSX

Ned Deily nad at
Wed Oct 13 11:10:09 CEST 2010

In article <8hl75sF6jtU1 at>,
 Gregory Ewing <greg.ewing at> wrote:
> On a related note, according to the man page for Apple's
> gcc, you're supposed to be able to use both '-arch i386'
> and '-arch x86_64' at the same time and get fat binaries.
> That would actually be my preferred option, because then
> I wouldn't have to go back and rebuild all my libraries
> if I decide to switch to 64 bit in the future.
> But I can't seem to get it to work -- it just uses the
> last architecture specified. Has anyone successfully done
> this? Is there some trick to it that I've missed?

You'll also need to specify the appropriate SDK using Apple's gcc 
-sysroot option.

 Ned Deily,
 nad at

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