x11/py-sip on MacOS X/Darwin fails:

[Brian de Alwis <briandealwis%gmail.com@localhost>]

Has anybody successfully built x11/py-sip on MacOS X (in particular  
10.6.1)?  I'm trying to install py-qt4.

[...]
This is SIP 4.8.2 for Python 2.6.2 on darwin.
The SIP code generator will be installed in /usr/pkg/bin.
The SIP module will be installed in /usr/pkg/lib/python2.6/site- 
packages.
The SIP header file will be installed in /usr/pkg/include/python2.6.
The default directory to install .sip files in is /usr/pkg/share/sip2.6.
The platform/compiler configuration is macx-g++.
Creating sipconfig.py...
Creating top level Makefile...
Creating sip code generator Makefile...
An internal error occured.  Please report all the output from the  
program,
including the following traceback, to support%riverbankcomputing.com.@localhost
Traceback (most recent call last):
  File "configure.py", line 415, in <module>
    main(sys.argv)
  File "configure.py", line 406, in main
    create_makefiles(macros)
  File "configure.py", line 264, in create_makefiles
    universal=opts.universal
  File "/private/tmp/obj/x11/py-sip/work/sip-4.8.2/sipconfig.py",  
line 1063, in generate
    self.generate_macros_and_rules(mfile)
  File "/private/tmp/obj/x11/py-sip/work/sip-4.8.2/sipconfig.py",  
line 1855, in generate_macros_and_rules
    Makefile.generate_macros_and_rules(self, mfile)
  File "/private/tmp/obj/x11/py-sip/work/sip-4.8.2/sipconfig.py",  
line 1106, in generate_macros_and_rules
    if sys.platform == "darwin" and self.config.qt_framework:
  File "/private/tmp/obj/x11/py-sip/work/sip-4.8.2/sipconfig.py",  
line 180, in __getattr__
    raise AttributeError("\"%s\" is not a valid configuration value  
or user option" % name)
AttributeError: "qt_framework" is not a valid configuration value or  
user option
*** Error code 1

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