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Modules/_tkinter.py #includes Modules/tkinter.h, tcl.h, and tk.h. The latter two #include tclDecls.h, tclPlatDecls.h, and tkDecls.h. I obtained 8.5.9 versions of all 5 and added them to Include/. Although they came from Ubuntu, they appear to be cross-platform in that they look for Mac and Win defines. They make the corresponding build errors go away. However, one remains: a failure to open X11/Xlib.h.
This must come from the following in tk.h:
#ifndef RC_INVOKED
#ifndef _XLIB_H
# if defined(MAC_OSX_TK)
# include <X11/Xlib.h>
# include <X11/X.h>
# else
# include <X11/Xlib.h>
# endif
#endif
#ifdef __STDC__
# include <stddef.h>
#endif
It seems this tk.h header, at least, expects RC_INVOKED to be defined on non-X11 platforms. Something here is crucially different than on the machine that builds Python for windows. The version of tk.h? the absence of X11/xlib.h? the pcbuild stuff? or the Visual Studio version?
I tried to compile PCbuild/pcbuild.sln with VC2008 Express in the 3.3, 3.2, and 2.7 repositories. For 3.3, I tried both debug and release builds.