some random comments about py3k-20121004-MINGW.patch:

- Modules/_ctypes/libffi_msvc/win32.S
  Please can you get rid of libffi_msvc and use libffi?
  afaics, libffi has support for mingw32.

- there seem to be chunks which are unrelated to mingw, like:

@@ -830,15 +926,18 @@ class PyBuildExt(build_ext):
             if have_usable_openssl:
                 # The _hashlib module wraps optimized implementations
                 # of hash functions from the OpenSSL library.
+                # NOTE: _hashlib require only OpenSSL crypto library !
                 exts.append( Extension('_hashlib', ['_hashopenssl.c'],
                                        depends = ['hashlib.h'],
                                        include_dirs = ssl_incs,
                                        library_dirs = ssl_libs,
-                                       libraries = ['ssl', 'crypto']) )
+                                       libraries = ['crypto']) )

please file separate issues.


- why setup_info.in. looks like something which could be done with get_config_var.

- why re-reading files in setup.py, and grepping these for config options?


I think the patch would benefit from splitting it up into several self-contained chunks.

did you try to do builds for windows and linux after this patch was applied?