Ronald Oussoren wrote:
> 
> On 13 Jan, 2010, at 18:41, M.-A. Lemburg wrote:
> 
>> Ronald Oussoren wrote:
>>>
>>> On Wednesday, January 13, 2010, at 04:15PM, "M.-A. Lemburg" 
>>> <[email protected]> wrote:
>>>
>>>>
>>>>> 2) On OS X, the modification to the value returned by
>>>>> pkg_resources.get_platform() isn't correct for fat version of Python
>>>>> 2.5, as detailed in setuptools issue 19.  To solve that, we're using the
>>>>> patch I submitted to the issue (with a couple recent changes).
>>>>
>>>> I think that using "fat" in the version string is wrong for
>>>> Mac OS X, since there are many ways to build fat binaries.
>>>>
>>>> Instead, the version string should include the details of
>>>> all included builds, ie. 'x86', 'x64', 'ppc', 'ppc64'.
>>>
>>> Maybe in the long run, but for now "fat" has a well-defined meaning for 
>>> distutils: fat == ppc + x86_64. There is also a number of other variants, 
>>> as described in the documentation for distutils.
>>
>> I think you meant: fat == ppc + i386.
> 
> Thats right.
>>
>> However, it's also possible to build binaries with ppc, i386 and
>> x86_64 - as are shipped with Mac OS X 10.6, so "fat" is not really
>> well-defined and could lead to trying to install 32-bit software for
>> a 64-bit build of Python.
> 
> "fat" is well-defined for distutils, see the definition of get_platform at 
> <http://docs.python.org/distutils/apiref.html>. 
> 
> For distutils "fat" is always a universal binary with architectures i386 and 
> ppc, with alternate names for other variants.

Thanks for pointing that out, however, I don't think that creating
aliases for combinations of various different architectures
is a good idea.

It's better to make the included architectures explicit and use
this logic for all platforms, not just Mac OS X.

>> IMHO, it's better to list the actually supported architectures
>> as e.g. "darwin-i386-ppc" or "darwin-i386-ppc-x86_64".
> 
> That is not how distutils currently works. I also object to "darwin" as a 
> prefix, the platform is named "macosx". Darwin is the opensource unix variant 
> used in OSX and that name shouldn't be interchangeably with macosx.  I'm also 
> unhappy that sys.platform is "darwin" on OSX, but it's probably too late to 
> change that.

"Darwin" is what Mac OS X itself returns as "uname -s" and that's
generally what's being used for sys.platform on Unix systems (configure
sets MACHDEP which then gets transmogrified into PLATFORM which then
is fed to Py_GetPlatform() which then gets exposed as sys.platform
- just wrote that down here, since I just spent half an hour trying
to find the definition of PLATFORM...).

I agree, though, that the marketing names of the OSes are
somewhat more intuitive :-)

-- 
Marc-Andre Lemburg
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