[1.5] question about python/ctypes/dlopen

Fri Dec 4 14:54:00 GMT 2009

Hello, i'm trying to use python ctypes which use under the hood dlopen.
I have a strange permission denied running this following code, if someone have
clues ...
Base code
------------------------
$ cat test_ctypes.py
from ctypes import CDLL
CDLL('libgeos_c.dll.a')
The faulting execution
------------------------
$ /minitage/dependencies/python-2.6/parts/part/bin/python test_ctypes.py
Traceback (most recent call last):
 File "test_ctypes.py", line 2, in <module>
 CDLL('libgeos_c.dll.a')
 File
"/minitage/dependencies/python-2.6/parts/part/lib/python2.6/ctypes/__init__.py",
line 353, in __init__
 self._handle = _dlopen(self._name, mode)
OSError: Permission denied
Another try
------------------------
$ cat test_ctypes.py
from ctypes import CDLL
CDLL('cyggeos_c-1.dll')
$ /minitage/dependencies/python-2.6/parts/part/bin/python test_ctypes.py
Traceback (most recent call last):
 File "test_ctypes.py", line 2, in <module>
 CDLL('cyggeos_c-1.dll')
 File
"/minitage/dependencies/python-2.6/parts/part/lib/python2.6/ctypes/__init__.py",
line 353, in __init__
 self._handle = _dlopen(self._name, mode)
OSError: Bad address
Environment
------------------------
The library is in the environment
$ ls /minitage/dependencies/geos-3.0/parts/part/bin/*dll
/minitage/dependencies/geos-3.0/parts/part/bin/cyggeos-3-0-3.dll
/minitage/dependencies/geos-3.0/parts/part/bin/cyggeos_c-1.dll
$ ls /minitage/dependencies/geos-3.0/parts/part/lib/
libgeos.a libgeos.dll.a libgeos.la libgeos_c.a libgeos_c.dll.a libgeos_c.la
$ echo $LD_LIBRARY_PATH
[CUTED...]:/cygdrive/e/minitage/dependencies/geos-3.0/parts/part/lib:[CUTED...]
$ echo $PATH
[CUTED...]:/cygdrive/e/minitage/dependencies/geos-3.0/parts/part/bin:[CUTED...]
I also attached cygcheck output.
-- 
Cordialement,
KiOrKY
GPG Key FingerPrint: 0x1A1194B7681112AF
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