https://issues.dlang.org/show_bug.cgi?id=23060

          Issue ID: 23060
           Summary: MacOS: core.sys.posix.sys.socket missing some
                    definitions
           Product: D
           Version: D2
          Hardware: All
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P1
         Component: druntime
          Assignee: nobody@puremagic.com
          Reporter: trikkuz@gmail.com

Some definitions (macros?) are not translated for version(Darwin):

CMSG_SPACE CMSG_FIRSTHDR CMSG_DATA CMSG_LEN

See: https://github.com/dlang/druntime/blob/6e5682a608a081587ca08a0eab08333a76bac4e2/src/core/sys/posix/sys/socket.d#L603

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