[PATCH, fortran] PR 53379 Backtrace on error termination

[FX]

> #define _FCLOEXEC       0x0000001000000000L
> #define O_CLOEXEC       _FCLOEXEC       /* sets FD_CLOEXEC on open      */

That’s weird, and definitely an AIX bug: http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html
How does that even work? open() takes int as second arg.

FX