Re: [Python-Dev] Python 2.7 Mac universal builds seem broken on trunk

[Ronald Oussoren]

On 29 Sep, 2009, at 18:17, M.-A. Lemburg wrote:

Ronald Oussoren wrote:

Use:

  ./configure --enable-framework --enable-universalsdk=/


included when you build a universal binary, defaulting to 32-bit.

The --with-universal-archs flag selects whichs architectures should be

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 ?!

the defaults match the binary installer on the python.org website,

Defaulting to a 32-bit build has several advantages. The first is that

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

This creates a 32-bit fat build that runs on 10.3.9 or later.

The installer is build using the script in Mac/BuildScript, and uses -- enable-framework --with-universalsk.

and

betas that wrap the Cocoa libraries instead).

To mimick the system default you'd have to default to 32-bit on 10.4,

I'd prefer to keep it this way for now to keep things simple.

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 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,

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 like the technology though, much more convenient than having parallel directory tries as on Linux.

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 :-)

Ronald

I hoped to find a document on docs.python.org that explains how to install Python, but sadly enough there isn't. Mac/README contains the right information, but isn't easily found if you're searching on the web or even if you're looking for documentation in the source tree.

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