[Issue 21331] New: Windows makefiles are outdated

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21331

          Issue ID: 21331
           Summary: Windows makefiles are outdated
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: grimmaple95 at gmail.com

Phobos' makefiles for windows are outdated and make building process
significantly harder than it should be. DMD's makefiles contain necessary
information to build with Visual Studio 2017 and 2019, and phobos requires
VIsual Studio 2015 or below.
I managed to get it working in the end, but I think the changes should be done
by someone knowledgable in D build environment

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