Hi all, So I'm working on a C++ application that will eventually embed or extend Python using Boost.Python, but I first need to get Python compiled correctly for my platform. I've got a Windows Vista 64-bit machine with a Core 2 processor, and I'm compiling with a VC8.
I downloaded the Python 2.5.1 source from python.org, and I opened the Visual Studio solution file that was in the PCbuild8 directory. I created a new x64 platform and managed to successfully compile the 'pythoncore' and 'python' projects (both in Debug and Release configurations), resulting in working executables. (Aside: When launched, the python console says "Python 2.5.1 [MSC v.1400 64 bit (AMD64)] on win32" up top. Does that seem right?) So, this program I'm writing with Boost.Python (that worked correctly on x86 with home-built libraries) won't compile with these x64 libraries. I keep getting 'unresolved external symbols.' But, I'm certain I'm linking in the library correctly. Here's a snippet from the output (with /verbose:lib) when compiling: 1>Searching libraries 1> <snip> 1> Searching ..\..\..\3rdParty\boost_1_34_0\lib_x64\libboost_python- vc80-mt-gy-1_34.lib: 1> <snip> 1> Searching ..\..\..\3rdParty\Python25\libs_x64\python25_d.lib: 1>Finished searching libraries 1>py_dyn_test.obj : error LNK2001: unresolved external symbol _Py_NoneStruct 1>vector_py.obj : error LNK2001: unresolved external symbol _Py_NoneStruct 1>volume_py.obj : error LNK2001: unresolved external symbol _Py_NoneStruct 1>py_dyn_test.obj : error LNK2001: unresolved external symbol _Py_RefTotal 1>vector_py.obj : error LNK2001: unresolved external symbol _Py_RefTotal 1>volume_py.obj : error LNK2001: unresolved external symbol _Py_RefTotal 1>volume_py.obj : error LNK2001: unresolved external symbol PyExc_IndexError If I switch to the Release configuration, I see fewer errors: 1>py_dyn_test.obj : error LNK2001: unresolved external symbol _Py_NoneStruct 1>volume_py.obj : error LNK2001: unresolved external symbol PyExc_IndexError Note that none of my own code is Debug-specific. Also, the code in my files is correct, because (as stated above), it worked fine for x86. Though I don't know how useful it is, I did open the python libraries in wordpad, and though most of the file wasn't legible, I did find strings "Py_NoneStruct," "Py_RefTotal," and "PyExc_IndexError." I suspect that I set up my "x64" platform configuration incorrectly, or missed something. It's basically the same as the Win32 configuration, except with the /MACHINE:X64 flag instead of / MACHINE:X86. One of the things I'm noticing just now, as I post this, is that the preprocessor flag "WIN32" is still defined in the x64 configuration. Maybe if I change that to "WIN64," I'll have better luck. Any advice you have on what the "correct" way to do this is would be appreciated. -Dan -- http://mail.python.org/mailman/listinfo/python-list
