[Pyobjc-dev] 10.6: Twisty maze of build issues

[Aahz <aa...@py...>]

I'm building an app on 10.5, trying to support Intel 10.4, 10.5, 10.6.
Currently I'm using a combination of PyObjC 1.4 (originally to support
PPC 10.4) and PyObjC 2.2b2 to capture FSEvents in a subprocess.  When
10.6 was released, my app crashed.  Then Apple delivered some updates and
my app started working in mid-November.  Now apparently Apple has put out
new updates and my app is crashing again.

I am moderately sure that I can fix this with some combination of build
changes, but I'd like some guidance to avoid thrashing around.  I'm
using the python.org build for Python 2.6.4.  I've tried upgrading to
PyObjC 2.2, but that breaks on 10.5 with

ImportError: dlopen(/Users/aahz/Library/Python/2.6/site-packages/pyobjc_core-2.2-py2.6-macosx-10.3-fat.egg/objc/_objc.so, 2): Library not loaded: /usr/lib/libxml2.2.dylib
  Reason: Incompatible library version: _objc.so requires version 10.0.0 or later, but libxml2.2.dylib provides version 9.0.0

Should I try just building PyObjC 2.2 from source?  I tried updating
macports before I realized that this was the system libxml.

AFAICT, PyObjC 2.2b2 is crashing on 

from Foundation import NSAutoreleasePool, NSMutableArray, NSString

in objc._bridgesupport._parseBridgeSupport() with "ValueError: Unknown
typestr".  Assuming the line number matches the source, that's

            objc.parseBridgeSupport(data, globals, frameworkName, *args, **kwds)

OTOH, the app built with PyObjC 1.4 is crashing with
USING_FORK_WITHOUT_EXEC_IS_NOT_SUPPORTED_BY_FILE_MANAGER
and I'm not sure where.  Any clues?
-- 
Aahz (aa...@py...)           <*>         http://www.pythoncraft.com/

"If you think it's expensive to hire a professional to do the job, wait
until you hire an amateur."  --Red Adair