@itemize
@item
Some platforms do not support @code{O_CLOEXEC}:
-Mac OS X 10.13, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 10, Cygwin 1.7.x, mingw, MSVC 14.
+@c See posix-headers/fcntl.texi for the list.
+Mac OS X 10.6, FreeBSD 8.4, NetBSD 5.1, OpenBSD 4.9, Minix 3.1.8, AIX 7.1, HP-UX 11, IRIX 6.5, Solaris 10, Cygwin 1.7.x, mingw, MSVC 14.
@item
On platforms where @code{off_t} is a 32-bit type, @code{open} may not work
correctly with files larger than 2 GB@. (Cf. @code{AC_SYS_LARGEFILE}.)