While building 2.5rc1 under MacOS 10.4.7, one of the ctypes module
unit tests fails:

% ./python.exe -V
Python 2.5c1 (r25c1:51426, Aug 21 2006, 11:30:05)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin

% uname -a
Darwin chrysophylax 8.7.0 Darwin Kernel Version 8.7.0: Fri May 26
15:20:53 PDT 2006; root:xnu-792.6.76.obj~1/RELEASE_PPC Power
Macintosh powerpc

Output report:
===========================================
===========================
FAIL: test_find (ctypes.test.test_macholib.MachOTest)
------------------------------------------------------------
----------

Traceback (most recent call last):
  File "/usr/local/src/python2.5/Lib/ctypes/test/test_macholib.py", line 
55, in test_find
    self.failUnless(result.startswith('/usr/lib/libz.1'))
AssertionError

------------------------------------------------------------

Ran 287 tests in 0.933s

FAILED (failures=1)
Traceback (most recent call last):
  File "Lib/test/test_ctypes.py", line 12, in <module>
    test_main()
  File "Lib/test/test_ctypes.py", line 9, in test_main
    run_suite(unittest.TestSuite(suites))
  File "/usr/local/src/python2.5/Lib/test/test_support.py", line 426, in 
run_suite
    raise TestFailed(err)
test.test_support.TestFailed: Traceback (most recent call last):
  File "/usr/local/src/python2.5/Lib/ctypes/test/test_macholib.py", line 
55, in test_find
    self.failUnless(result.startswith('/usr/lib/libz.1'))
AssertionError

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Ronald: just guesing that you know more about this than I do...

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This is a rather annoying, but shallow, failure. Dlopen on osx is quite touchy
about the flags you use to open a shared library.

Anyway, all tests pass on the trunk and 2.5 branch, I guess this was fixed before
2.5 was released. I have had an e-mail exchange with Thomas Heller about a
simular issue and he has checked in a fixed for that before 2.5 was released.\

I'm therefore closing this issue.

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As of 2006-10-9 I still get this error compiling on
OS X 10.4.8
Python 2.5 (r25:51908, Oct 9 2006, 11:15:40)

test_ctypes
test test_ctypes failed -- Traceback (most recent call last):
  File
"/Users/robrien/src/Python-2.5/Lib/ctypes/test/test_macholib.py",
line 55, in test_find
    self.failUnless(result.startswith('/usr/lib/libz.1'))
AssertionError

reedobrien: can you still reproduce the problem?

I'll close this issue unless we can confirm it's still present.

I am no longer using OSX 10.4.x, but this issue appears fixed in 2.5.4
and 2.6.1 on OSX 10.5.6

I have no reason for this to stay open

Setting issue back to "open". I'm going to install a 10.4 PPC test machine
over the weekend to try to reproduce the problem there.

bpo-5413 might be related to this one, that one also seems to be about
some ctypes code that doesn't work on a PPC system (10.5 server in that
case).

Can this now be closed?

Verified that the ctypes test_macholib tests in current Python 2.7, 2.6.6, and even 2.5.3 run without failure on OS X 10.4.11 PPC.

FYI: The analysis in bpo-21093 suggests a probable failure cause: a local copy of libz in either $HOME/lib or /usr/local/lib.