Any ada maintainers out there this afternoon? (Ada bootstrap broken on newlib targets)

[Dave Korn <dave dot korn dot cygwin at googlemail dot com>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40857


  There's a clash between the FOPEN macro used by Ada (defined in adaint.h to
hide 32/64-bit file i/o selection) and an identically named macro defined in
newlib's sys/_default_fcntl.h.

  Since they're only used in a few places, I think that probably the better
solution would be to stick a prefix in front of Ada's macros rather than
#undef the one from the newlib header, so I'm about to start work on a patch
that adds a "_GNAT_" prefix to each of the definitions in adaint.h, and their
respective uses in adaint.c and cstreams.c.

  If any Ada maintainers would prefer a different prefix name, please drop me
a line or post to PR40857.  Thanks.

    cheers,
      DaveK