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Windows ARM doesn't support full win32 api, e.g. no registry and winsock. So the python fail to compile with VC11 beta in ARM configuration.

Thanks for your report. Unfortunately Python 3.2 won't ever work in this way because changing compilers would be a new feature, and bug fix releases like 3.2 don't receive new features. Yesterday we completed the transition to VS2010 as a step towards our 3.3 release.
We are open to supporting VS11, but it won't become the standard compiler suite we use until VS11 goes RTM. I'm not aware of any release schedule announced yet, but I believe we would need VS11 to be released before our first beta release, which is at the end of June. Most estimates I've seen don't look favorable for us supporting it in 3.3.
Another issue that may hinder this is that myself, and as far as I know, the other developers, do not have ARM machines available to them. I'm interested in continuing our transition from VS2010 on to VS11 for when it's ready, but anything ARM related will likely require someone else to help out, maybe even you :)

In any case, there is a branch supporting Python as a metro app at
http://hg.python.org/sandbox/loewis#win8app
This may get folded back into Python at some point, but certainly not before Windows 8 is released.

Can we close this due to the extensive work being done by Steve and Zach on the Windows build environment that I believe are covered by other issues?

None of this work affects WinRT. I don't know whether support of WinRT is a goal, but it is certainly not a solved problem.

The build environment won't help here, this requires some significant rewrites within Python to remove usage of Windows APIs that don't work under the WinRT sandbox (similar to the projects to embed Python in Chromium et al.)
I'd still like to see it done, but it's a huge task that is probably never going to be tackled by python-dev directly.

Fixed in master branch. Thank you, Minmin Gong!
I don't think this is a candidate for a 3.7 backport. If you think otherwise, though, please say so. You'll also need to check that the backport enables proper compilation on ARM.

Unless Steve thinks otherwise, I agree that this isn’t a candidate for backporting to 3.7 without all the work to fully support new platform configurations.