[Python-Dev] Python 2.7 Mac universal builds seem broken on trunk (original) (raw)

M.-A. Lemburg mal at egenix.com
Tue Sep 29 18:17:15 CEST 2009

Ronald Oussoren wrote:

Use:

./configure --enable-framework --enable-universalsdk=/ The --with-universal-archs flag selects whichs architectures should be included when you build a universal binary, defaulting to 32-bit. The Python default on 10.6 is 64-bit, so wouldn't it be better to default to that on 10.6 and use 32-bit as default on 10.3/4/5 ?! Defaulting to a 32-bit build has several advantages. The first is that the defaults match the binary installer on the python.org website,

What build options does that installer use ? (the web-page doesn't say)

and secondly there are still 3th-party libraries that don't work in 64-bit mode (mostly GUI libraries, until recently Tk and wxWidgets wrapped the Carbon libraries which are not available in 64-bit mode; AFAIK both have betas that wrap the Cocoa libraries instead).

To mimick the system default you'd have to default to 32-bit on 10.4, 4-way universal on 10.5 and 3-way universal on 10.6, and that is without considering deployment targets. All of those are available as options, I'd prefer to keep it this way for now to keep things simple.

Hmm, so I guess the only way to support them all is by building extensions using 4-way universal on 10.5. No wonder they are called "fat" binaries ;-)

I'll write some documentation on the build options on OSX, but don't know what's the best location to do so.

Please put that information into Mac/README which already has documentation for how to build universal binaries on Mac. I know that, I wrote most of that file ;-).

Which is why I was surprised you asked :-)

I guess I should also add logic to configure that bails out when you specifiy --with-universal-archs without asking for a universal build.

That would be useful. I've committed a patch to the trunk and 2.6 that does this.

Thanks.

-- Marc-Andre Lemburg eGenix.com

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