[Issue 16958] New: replace -mavx switch with -mcpu=id

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16958

          Issue ID: 16958
           Summary: replace -mavx switch with -mcpu=id
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: bugzilla at digitalmars.com

More expandable. Support -mcpu=?|avx|native, where native means the
architecture of the machine the compiler is running on. Suggested by John
Colvin.

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