Windows: Add mising system DLLs import libraries.

[Biswa96]

No description provided.

[giampaolo]

It looks like this breaks python 2.7
https://ci.appveyor.com/project/giampaolo/psutil/builds/35688603/job/q3d29ymct4bwyeou
What problem does this solve? Can you provide an error/traceback?

[Biswa96]

This helps to build without using GetProcAddress function (here psutil_loadlibs). The build error in Appveyor seems suspicious. The error is LINK : fatal error LNK1181: cannot open input file 'ntdll.lib'. It is related to Visual Studio. But ntdll.lib is present in any version of Windows SDK.

[giampaolo]

What's the problem with GetProcAddress / psutil_loadlibs?

[Biswa96]

While compiling with GCC in Windows, there are may errors about multiple definition at linking time. Probably because many APIs are redefined in ntexapi.h file.

[giampaolo]

GCC on Windows? Are you trying to compile for cygwin? Because in that case it's not supported.

[Biswa96]

It's MSYS2/mingw.

[giampaolo]

Also not supported (explicitly, I dropped mingw support years ago because supporting both compilers was a pain + the VS suite for compiling became free). You should use Visual Studio. setup.py could be be made a bit smarter to detect that and recommend VS though.