[Pythonmac-SIG] Using py2app on 10.5 to build apps that run on 10.4?

Russell E. Owen rowen at cesmail.net
Sat Feb 23 00:23:03 CET 2008

In article <47AA2055.5070007 at codebykevin.com>,
 Kevin Walzer <kw at codebykevin.com> wrote:

> Russell E. Owen wrote:
> > I'd love to upgrade to Leopard, but I maintain a python application that 
> > needs to run on 10.4 (and preferably 10.3.9).
> > 
> > So...is it now practical to build 10.4-compatible applications using 
> > py2app on a 10.5 computer? What is involved? (For instance I remember 
> > reading that the built-in python needed some fixes for distutils to be 
> > able to make fat binaries, but I have no idea what the fixes are or how 
> > to install them).
> > 
> > Does it help (or hurt?) if I use a 3rd party installation of Python, 
> > instead of the built in python?
> > 
> > -- Russell
> > 
> As long as all the binary bits in your app bundle are compatible with 
> 10.4, then you should be fine.
> I develop and build Phynchronicity 
> (http://www.codebykevin.com/phynchronicity.html) on 10.5, and it runs 
> with no problem on 10.4. I build everything using the 
> "-mmacosx-version-min=10.4." This is using a custom build of Python 
> 2.5.1 that links to Tk 8.5, my own build of Tk 8.5, and various Tk 
> extensions.
> I can't speak for 10.3.9.

Thank you very much.

So if I understand this right...as long as I install a python that was 
built with the -mmacosx-version-min=10.4 flag then distutils will 
automatically build python packages using the same flag. (Of course I 
can also install 10.4-compatible package binaries, but I'm hoping to 
upgrade to Tcl/Tk 8.5 and I doubt I'll find binaries for that.)

If so...does it suffice to use the Mac Python binaries that were built 
to be compatible with 10.4 or must I compile my own python and 
explicitly add use that flag?

-- Russell

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