@itemize
@item
This function is missing on some platforms:
-glibc 2.3.6, MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
+glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, MSVC 9,
Interix 3.5, BeOS.
But the replacement function is not safe to be used in libraries and is not multithread-safe.
The gnulib replacement function always fails with @samp{ENOSYS} on
some platforms:
mingw, MSVC 9.
+@item
+If the argument exists and is a directory, the gnulib replacement
+function fails with @code{EISDIR} instead of the correct
+@code{EEXIST}: HP-UX 11.11.
@end itemize