https://issues.dlang.org/show_bug.cgi?id=23787

          Issue ID: 23787
           Summary: ImportC: __unaligned
           Product: D
           Version: D2
          Hardware: All
                OS: Windows
            Status: NEW
          Keywords: ImportC
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: maxsamukha@gmail.com

MS-specific: https://learn.microsoft.com/en-us/cpp/cpp/unaligned

Used in the SDK headers (winnt.h)

--