> On 23. 1. 2017 13:58, Antoine Martin wrote:
>> Hi,
>>
>> It seems that the 64-bit version of the gtkglext package is missing
>> something as we are unable to load one of the DLL it installs:
>>
>> pacman -S mingw-w64-x86_64-gtkglext
>> python -c 'from ctypes import
>> cdll;cdll.LoadLibrary("C:\\msys64\\mingw64\\bin\\libgdkglext-win32-1.0-0.dll")'
>>
>> fails with:
>> WindowsError: [Error 127] The specified procedure could not be found
>>
>> The 32-bit version does not have this problem.
>> ldd doesn't show anything missing, depends.exe does show some problems
>> with libgdk_pixbuf - but I'm not sure I trust this ancient tool.
>> (and gdk_pixbuf is there of course)Manual inspection showed that the DLL is trying to import `DllMain` from libgdk_pixbuf-2.0-0.dll, which it does not export. The 32-bit version has got no such import entry. >> Questions: >> * what is the best way to check that a DLL is valid and has all its >> required dependencies installed? (I use python here but surely there is >> a better way?) I don't know any reliable general-purpose way. Seems like only ctypes and depends find the issue. >> * can I trace the DLL loading to see where it is failing? You can try `ntldd`, `ldd`, `cygcheck`, `depends`, all with varying degrees of success, YMMV. >> * since this problem does not affect the 32-bit version, it is fair to >> assume that something is going wrong during building / linking - are >> there any specific gotchas to look for? Sometimes an accident happens and there are bad packages (sometimes only on one architecture), so it's good to ask if others have the same problem. I can confirm this happens to me as well. If I run an appropriate command outside MSYS2 (i.e. in plain cmd), I even get an error saying it's `DllMain` that's missing. In conclusion, it seems some package(s) require(s) re-building. You should probably open a ticket on <http://github.com/alexpux/mingw-packages>. -- David Macek
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