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@node sys/socket.h
@section @file{sys/socket.h}
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html}
Gnulib module: sys_socket
Portability problems fixed by Gnulib:
@itemize
@item
This header file is missing on some platforms:
mingw, MSVC 14.
@item
This header file is not self-contained on some platforms: it requires
@code{<sys/types.h>} to be included first.
@item
This header file does not define the type @code{socklen_t} on some platforms:
IRIX 6.5.
@item
This header file does not define the type @code{struct iovec} on some platforms:
OpenBSD 4.4.
@item
This header file is lacking the @code{SHUT_RD}, @code{SHUT_WR},
@code{SHUT_RDWR} macros on some platforms, despite having the @code{shutdown}
functions:
emx+gcc.
@item
The @code{struct sockaddr_storage} type does not have a member @code{ss_family}
on some platforms:
AIX 7.1.
@item
The @code{CMSG_SPACE} and @code{CMSG_LEN} macros are not provided on some
platforms:
OpenVMS.
@item
This header file does not define the @code{SO_REUSEPORT} macro on some
platforms:
Minix 3.1.8, Solaris 10, Cygwin, mingw, MSVC 14.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This header file does not declare the @code{msg_control} and
@code{msg_controllen} members of @code{struct msghdr} on some
platforms. This can be detected by the absence of the
@code{CMSG_FIRSTHDR} macro:
gnulib replacement header, old BSD
@end itemize
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