Portability problems fixed by the Gnulib module open:
@itemize
@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}.)
+@item
This function does not fail when the file name argument ends in a slash
and (without the slash) names a nonexistent file or a file that is not a
directory, on some platforms:
On Windows, this function returns a file handle in @code{O_TEXT} mode by
default; this means that it translates '\n' to CR/LF by default. Use the
@code{O_BINARY} flag if you need reliable binary I/O.
-@item
-On platforms where @code{off_t} is a 32-bit type, @code{open} may not work
-correctly with files larger than 2 GB. The fix is to use the
-@code{AC_SYS_LARGEFILE} macro.
@end itemize