Compiling new Pythons on old Windows compilers

eryk sun eryksun at
Sun Mar 12 16:45:34 EDT 2017

On Sun, Mar 12, 2017 at 5:02 PM, Eric Frederich
<eric.frederich at> wrote:
> Any idea why compatibility was dropped recently?  There used to be a PC
> directory with different VS directories in the source tree, now it isn't
> there any more.

CPython 3.5+ uses the Universal CRT on Windows, which is a system
component in Vista and later (a recommended update for Windows
versions prior to 10). See this blog post:

More information about the Python-list mailing list