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