[issue11258] ctypes: Speed up find_library() on Linux by 500%

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Reopening and reverted the commit in r88640. The patch changes behaviour by turning the previous unrooted filename ('libc.so.6') into a full path ('/lib64/libc.so.6'). This breaks builds where multiple versions of a library are available and only one is loadable, e.g. 32-bit builds on 64-bit machines:

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ERROR: test_load (ctypes.test.test_loading.LoaderTest)
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Traceback (most recent call last):
  File "/home2/buildbot2/slave/hg-3.x.loewis-parallel/build/Lib/ctypes/test/test_loading.py", line 26, in test_load
    CDLL(libc_name)
  File "/home2/buildbot2/slave/hg-3.x.loewis-parallel/build/Lib/ctypes/__init__.py", line 340, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: /lib64/libc.so.6: wrong ELF class: ELFCLASS64

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resolution: fixed -> 
stage: committed/rejected -> patch review
status: closed -> open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11258>
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