[Bug libstdc++/78050] New: Missing define for cross *-mingw32*

[lukeallardyce at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78050

            Bug ID: 78050
           Summary: Missing define for cross *-mingw32*
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lukeallardyce at gmail dot com
  Target Milestone: ---

Created attachment 39849
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39849&action=edit
crossconfig patch

Cross compiling for mingw required an extra define for the new overaligned
support, patch attached.