@itemize
@item
This function is missing on some platforms:
-FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5.
+FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, IRIX 6.5, Solaris 9,
+Interix 3.5.
+@item
+This function is only provided as a macro on some platforms:
+Cygwin 1.5.x.
@end itemize