When building pythoncore for AMD64 (WIndows) on VS2005, I get the following error : 

3>generate buildinfo
3>cl.exe -c -D_WIN32 -DUSE_DL_EXPORT -D_WINDOWS -DWIN32 -D_WINDLL -MD -MD /USECL:MS_OPTERON ..\Modules\getbuildinfo.c -Fogetbuildinfo.o -I..\Include -I..\PC
3>Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86
3>Copyright (C) Microsoft Corporation.  All rights reserved.
3>getbuildinfo.c
3>Linking...
3>LINK : warning LNK4044: unrecognized option '/USELINK:MS_SDK'; ignored
3>getbuildinfo.o : fatal error LNK1112: module machine type 'X86' conflicts with target machine type 'x64'
3>Build log was saved at "file://d:\users\fbr\python build\Python-2.5\PCbuild8\amd64-temp-release\pythoncore\BuildLog.htm"
3>pythoncore - 1 error(s), 225 warning(s)

I already looked for the issue on google and on the ML archive (http://mail.python.org/pipermail/python-dev/2006-March/062753.html) but the workaround explained there (checking vsextcompiler) is specific for VC2003.

Has anyone solved this problem ?