[MacPorts] #21316: Failing to build py2app apps due to macholib error

[MacPorts]

#21316: Failing to build py2app apps due to macholib error
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 Reporter:  dmitrykichenko@…                         |       Owner:  macports-tickets@…                   
     Type:  defect                                   |      Status:  new                                  
 Priority:  Normal                                   |   Milestone:                                       
Component:  ports                                    |     Version:  1.8.0                                
 Keywords:  SnowLeopard, py2app, macholib, python26  |        Port:  py2app                               
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 Building apps with py2app fails on Snow Leopard with MacPorts' python26
 and both py26-py2app and py26-py2app-devel (and the latest SVN checkout
 too). The problem appears to be with macholib.

 I have tried compiling all ports with a +universal flag. Everything
 compiles without issue, except for when compiling a universal build where
 apr fails to build as a 64-bit binary but everything else builds just
 fine. The issue crops up with my own apps as well as a dummy app and a
 one-line setup.py.

 Here is the traceback for when attempting to build an app:
 {{{
 Traceback (most recent call last):
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/py2app-0.4.2-py2.6.egg/py2app/build_app.py", line 589, in
 _run
     self.run_normal()
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/py2app-0.4.2-py2.6.egg/py2app/build_app.py", line 660, in
 run_normal
     self.create_binaries(py_files, pkgdirs, extensions, loader_files)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/py2app-0.4.2-py2.6.egg/py2app/build_app.py", line 768, in
 create_binaries
     mm.mm.run_file(runtime)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachOGraph.py", line 66, in run_file
     m = self.createNode(MachO, pathname)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachOStandalone.py", line 23, in createNode
     res = super(FilteredMachOGraph, self).createNode(cls, name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/altgraph/ObjectGraph.py", line 148, in createNode
     m = cls(name, *args, **kw)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachO.py", line 63, in __init__
     self.load(file(filename, 'rb'))
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachO.py", line 78, in load
     self.load_header(fh, 0, size)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachO.py", line 108, in load_header
     hdr = MachOHeader(self, fh, offset, size, magic, hdr, endian)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachO.py", line 148, in __init__
     self.load(fh)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/MachO.py", line 161, in load
     header = self.mach_header.from_fileobj(fh, **kw)

 File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/ptypes.py", line 44, in from_fileobj
     return cls.from_str(f.read(cls._size_), **kw)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
 /site-packages/macholib/ptypes.py", line 48, in from_str
     return cls.from_tuple(struct.unpack(endian + cls._format_, s), **kw)
 error: unpack requires a string argument of length 32
 }}}

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Ticket URL: <http://trac.macports.org/ticket/21316>
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