Compiling 64 bit python on a mac - cannot compute sizeof (int)

[Adam]

On Jul 3, 2:18 pm, Mark Dickinson <dicki... at gmail.com> wrote:
> On Jul 3, 5:30 pm, Keflavich <keflav... at gmail.com> wrote:
>
> > I'm trying to compile a 64 bit version of python 2.6.2 on my mac (OS X
> > 10.5.7), and am running into a problem during the configure stage.
>
> > I configure with:
> > ./configure --enable-framework=/Library/Frameworks --enable-
> > universalsdk MACOSX_DEPLOYMENT_TARGET=10.5 --with-universal-archs=all -
> > with-readline-dir=/usr/local
>
> > because I want 64 and 32 bit, and I needed to install a 64 bit
> > readline as a prerequisite.
>
> > configure fails at:
> > checking size of int... configure: error: cannot compute sizeof (int)
>
> I confess that I don't fully understand the intricacies of the various
> OS X autoconf options, but I think the problem is that the --enable-
> universalsdk option takes a directory.  If that directory isn't
> given, it appears to default to /Developer/SDKs/MacOSX10.4u.sdk (at
> least on my OS X 10.5.7 machine), which would likely conflict with
> your MACOSX_DEPLOYMENT_TARGET=10.5 setting.
>
> Try either changing MACOSX_DEPLOYMENT_TARGET to 10.4, or using --
> enable-universalsdk=/Developer/SDKs/MacOSX10.5.sdk  (or whatever the
> appropriate directory is on your system).  For some reason, I think
> using --enable-universalsdk=/ also works on my system.  If none of
> that helps, you might try asking this question over on the pythonmac-
> sig mailing list. (http://mail.python.org/mailman/listinfo/pythonmac-
> sig)
>
> Mark

Thanks.  I also determined after the fact that universalsdk was the
problem, but I didn't know how to fix it.  Unfortunately, it turns out
what you identified was a transcription error on my part - I had been
using --enable-universalsdk instead of --enable-universalsdk=/.
Thanks for the help, I appreciate it!

Adam