@itemize
@item
This header file is missing on some platforms:
-mingw, BeOS.
+mingw, MSVC 9, BeOS.
@item
This header file is incomplete on some platforms:
Cygwin 1.5.x, Haiku.
@item
+This header file does not define the type @code{socklen_t} on some platforms:
+HP-UX 10.20, IRIX 6.5, OSF/1 4.0, Interix 3.5, BeOS.
+
+@item
This header file does not define @code{AI_ALL}, @code{AI_V4MAPPED},
@code{AI_ADDRCONFIG} on some platforms:
NetBSD 5.0.