https://issues.dlang.org/show_bug.cgi?id=23886

          Issue ID: 23886
           Summary: ImportC preprocessor directives #ident and #sccs are
                    not supported
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: bugzilla@digitalmars.com

https://gcc.gnu.org/onlinedocs/cpp/Other-Directives.html

says:

The ‘#ident’ directive takes one argument, a string constant. On some systems,
that string constant is copied into a special segment of the object file. On
other systems, the directive is ignored. The ‘#sccs’ directive is a synonym for
‘#ident’.

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