On 9/20/2010 3:21 PM, Giovanni Bajo wrote:
On 9/19/2010 7:22 PM, Florian Höch wrote:
Ok, I've made progress. I added a lot of print's and tracked the error
to the uuid module from the standard library.
Actually, using r854 does not solve the underlying problem. The problem
is that uuid uses ctypes.find_library and ctypes.CDLL to find and load
the C standard library to access some of its functions. With Python 2.6
and later, this is msvcr90.dll.
If you build an executable with pyinstaller r854, the msvcr90.dll will
be in a subfolder Microsoft.VC90.CRT and is simply not found by
ctypes.find_library. Normally this would throw an exception, but it is
catched and then silently ignored inside uuid.
If you build with pyinstaller r855 and later, msvcr90.dll will be next
to the executable. There, it will be found by ctypes.find_library, and
when it tries to load it using ctypes.CDLL, the R6034 error dialog
appears (before it throws the exception, which is silently ignored like
I said). The application should run normal after that if it not
absolutely requires access to the C library via ctypes (uuid should work
regardless as far as I can tell).
All applications that actually require access to the C library via
ctypes will probably fail at some point, regardless of the pyinstaller
version used to create them.
Thanks for the analysys. A possible solution would be to patch
find_library at runtime through a runtime hook (and its cousing
find_msvcrt(), which is a shortcut to find_library("c") under Windows,
as far as I can tell).
But what should we do? My understand is that CDLL() simply calls
LoadLibrary() on Windows. Why LoadLibrary("msvcr90.dll") fails when the
application is packaged by PyInstaller? If I understand correctly it
fails whether if the DLL is in a subdirectory (silent fail) or the DLL
is next to the executable (R6034). Is it really impossible for a
PyInstaller-packaged binary to dynamically load msvcr90.dll? What would
be the correct Win32 API code to do it? Maybe there is some activation
context needed?
Something like this maybe?
http://www.gamedev.net/community/forums/topic.asp?topic_id=535384&whichpage=1�
--
Giovanni Bajo :: [email protected]
Develer S.r.l. :: http://www.develer.com
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