diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 9999600..b75a53b 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -169,7 +169,7 @@ endif
 ifeq ($(subdir),io)
 sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
 		   sync_file_range fallocate fallocate64
-sysdep_headers += bits/fcntl-linux.h
+sysdep_headers += bits/fcntl-linux.h bits/socket-linux.h
 endif
 
 ifeq ($(subdir),elf)
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/socket.h b/sysdeps/unix/sysv/linux/aarch64/bits/socket.h
new file mode 100644
index 0000000..7f6bf84
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  AArch64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_AARCH64_SOCKET_H
+#define __BITS_AARCH64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/socket.h b/sysdeps/unix/sysv/linux/alpha/bits/socket.h
new file mode 100644
index 0000000..bec9330
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  Alpha Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_ALPHA_SOCKET_H
+#define __BITS_ALPHA_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/arm/bits/socket.h b/sysdeps/unix/sysv/linux/arm/bits/socket.h
new file mode 100644
index 0000000..4d141d6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  ARM Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_ARM_SOCKET_H
+#define __BITS_ARM_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/bits/socket-linux.h b/sysdeps/unix/sysv/linux/bits/socket-linux.h
new file mode 100644
index 0000000..0b1b15d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/socket-linux.h
@@ -0,0 +1,355 @@
+/* System-specific socket constants and types.  Linux version.
+   Copyright (C) 1991-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_SOCKET_H
+#define __BITS_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+#define __need_size_t
+#include <stddef.h>
+
+#include <sys/types.h>
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Get the architecture-dependent definition of enum __socket_type.  */
+#include <bits/socket_type.h>
+
+/* Protocol families.  */
+#define PF_UNSPEC	0	/* Unspecified.  */
+#define PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
+#define PF_UNIX		PF_LOCAL /* POSIX name for PF_LOCAL.  */
+#define PF_FILE		PF_LOCAL /* Another non-standard name for PF_LOCAL.  */
+#define PF_INET		2	/* IP protocol family.  */
+#define PF_AX25		3	/* Amateur Radio AX.25.  */
+#define PF_IPX		4	/* Novell Internet Protocol.  */
+#define PF_APPLETALK	5	/* Appletalk DDP.  */
+#define PF_NETROM	6	/* Amateur radio NetROM.  */
+#define PF_BRIDGE	7	/* Multiprotocol bridge.  */
+#define PF_ATMPVC	8	/* ATM PVCs.  */
+#define PF_X25		9	/* Reserved for X.25 project.  */
+#define PF_INET6	10	/* IP version 6.  */
+#define PF_ROSE		11	/* Amateur Radio X.25 PLP.  */
+#define PF_DECnet	12	/* Reserved for DECnet project.  */
+#define PF_NETBEUI	13	/* Reserved for 802.2LLC project.  */
+#define PF_SECURITY	14	/* Security callback pseudo AF.  */
+#define PF_KEY		15	/* PF_KEY key management API.  */
+#define PF_NETLINK	16
+#define PF_ROUTE	PF_NETLINK /* Alias to emulate 4.4BSD.  */
+#define PF_PACKET	17	/* Packet family.  */
+#define PF_ASH		18	/* Ash.  */
+#define PF_ECONET	19	/* Acorn Econet.  */
+#define PF_ATMSVC	20	/* ATM SVCs.  */
+#define PF_RDS		21	/* RDS sockets.  */
+#define PF_SNA		22	/* Linux SNA Project */
+#define PF_IRDA		23	/* IRDA sockets.  */
+#define PF_PPPOX	24	/* PPPoX sockets.  */
+#define PF_WANPIPE	25	/* Wanpipe API sockets.  */
+#define PF_LLC		26	/* Linux LLC.  */
+#define PF_IB		27	/* Native InfiniBand address.  */
+#define PF_MPLS		28	/* MPLS.  */
+#define PF_CAN		29	/* Controller Area Network.  */
+#define PF_TIPC		30	/* TIPC sockets.  */
+#define PF_BLUETOOTH	31	/* Bluetooth sockets.  */
+#define PF_IUCV		32	/* IUCV sockets.  */
+#define PF_RXRPC	33	/* RxRPC sockets.  */
+#define PF_ISDN		34	/* mISDN sockets.  */
+#define PF_PHONET	35	/* Phonet sockets.  */
+#define PF_IEEE802154	36	/* IEEE 802.15.4 sockets.  */
+#define PF_CAIF		37	/* CAIF sockets.  */
+#define PF_ALG		38	/* Algorithm sockets.  */
+#define PF_NFC		39	/* NFC sockets.  */
+#define PF_VSOCK	40	/* vSockets.  */
+#define PF_MAX		41	/* For now..  */
+
+/* Address families.  */
+#define AF_UNSPEC	PF_UNSPEC
+#define AF_LOCAL	PF_LOCAL
+#define AF_UNIX		PF_UNIX
+#define AF_FILE		PF_FILE
+#define AF_INET		PF_INET
+#define AF_AX25		PF_AX25
+#define AF_IPX		PF_IPX
+#define AF_APPLETALK	PF_APPLETALK
+#define AF_NETROM	PF_NETROM
+#define AF_BRIDGE	PF_BRIDGE
+#define AF_ATMPVC	PF_ATMPVC
+#define AF_X25		PF_X25
+#define AF_INET6	PF_INET6
+#define AF_ROSE		PF_ROSE
+#define AF_DECnet	PF_DECnet
+#define AF_NETBEUI	PF_NETBEUI
+#define AF_SECURITY	PF_SECURITY
+#define AF_KEY		PF_KEY
+#define AF_NETLINK	PF_NETLINK
+#define AF_ROUTE	PF_ROUTE
+#define AF_PACKET	PF_PACKET
+#define AF_ASH		PF_ASH
+#define AF_ECONET	PF_ECONET
+#define AF_ATMSVC	PF_ATMSVC
+#define AF_RDS		PF_RDS
+#define AF_SNA		PF_SNA
+#define AF_IRDA		PF_IRDA
+#define AF_PPPOX	PF_PPPOX
+#define AF_WANPIPE	PF_WANPIPE
+#define AF_LLC		PF_LLC
+#define AF_IB		PF_IB
+#define AF_MPLS		PF_MPLS
+#define AF_CAN		PF_CAN
+#define AF_TIPC		PF_TIPC
+#define AF_BLUETOOTH	PF_BLUETOOTH
+#define AF_IUCV		PF_IUCV
+#define AF_RXRPC	PF_RXRPC
+#define AF_ISDN		PF_ISDN
+#define AF_PHONET	PF_PHONET
+#define AF_IEEE802154	PF_IEEE802154
+#define AF_CAIF		PF_CAIF
+#define AF_ALG		PF_ALG
+#define AF_NFC		PF_NFC
+#define AF_VSOCK	PF_VSOCK
+#define AF_MAX		PF_MAX
+
+/* Socket level values.  Others are defined in the appropriate headers.
+
+   XXX These definitions also should go into the appropriate headers as
+   far as they are available.  */
+#define SOL_RAW		255
+#define SOL_DECNET      261
+#define SOL_X25         262
+#define SOL_PACKET	263
+#define SOL_ATM		264	/* ATM layer (cell level).  */
+#define SOL_AAL		265	/* ATM Adaption Layer (packet level).  */
+#define SOL_IRDA	266
+
+/* Maximum queue length specifiable by listen.  */
+#define SOMAXCONN	128
+
+/* Get the definition of the macro to define the common sockaddr members.  */
+#include <bits/sockaddr.h>
+
+/* Structure describing a generic socket address.  */
+struct sockaddr
+  {
+    __SOCKADDR_COMMON (sa_);	/* Common data: address family and length.  */
+    char sa_data[14];		/* Address data.  */
+  };
+
+
+/* Structure large enough to hold any socket address (with the historical
+   exception of AF_UNIX).  We reserve 128 bytes.  */
+#define __ss_aligntype	unsigned long int
+#define _SS_SIZE	128
+#define _SS_PADSIZE	(_SS_SIZE - (2 * sizeof (__ss_aligntype)))
+
+struct sockaddr_storage
+  {
+    __SOCKADDR_COMMON (ss_);	/* Address family, etc.  */
+    __ss_aligntype __ss_align;	/* Force desired alignment.  */
+    char __ss_padding[_SS_PADSIZE];
+  };
+
+
+/* Bits in the FLAGS argument to `send', `recv', et al.  */
+enum
+  {
+    MSG_OOB		= 0x01,	/* Process out-of-band data.  */
+#define MSG_OOB		MSG_OOB
+    MSG_PEEK		= 0x02,	/* Peek at incoming messages.  */
+#define MSG_PEEK	MSG_PEEK
+    MSG_DONTROUTE	= 0x04,	/* Don't use local routing.  */
+#define MSG_DONTROUTE	MSG_DONTROUTE
+#ifdef __USE_GNU
+    /* DECnet uses a different name.  */
+    MSG_TRYHARD		= MSG_DONTROUTE,
+# define MSG_TRYHARD	MSG_DONTROUTE
+#endif
+    MSG_CTRUNC		= 0x08,	/* Control data lost before delivery.  */
+#define MSG_CTRUNC	MSG_CTRUNC
+    MSG_PROXY		= 0x10,	/* Supply or ask second address.  */
+#define MSG_PROXY	MSG_PROXY
+    MSG_TRUNC		= 0x20,
+#define MSG_TRUNC	MSG_TRUNC
+    MSG_DONTWAIT	= 0x40, /* Nonblocking IO.  */
+#define MSG_DONTWAIT	MSG_DONTWAIT
+    MSG_EOR		= 0x80, /* End of record.  */
+#define MSG_EOR		MSG_EOR
+    MSG_WAITALL		= 0x100, /* Wait for a full request.  */
+#define MSG_WAITALL	MSG_WAITALL
+    MSG_FIN		= 0x200,
+#define MSG_FIN		MSG_FIN
+    MSG_SYN		= 0x400,
+#define MSG_SYN		MSG_SYN
+    MSG_CONFIRM		= 0x800, /* Confirm path validity.  */
+#define MSG_CONFIRM	MSG_CONFIRM
+    MSG_RST		= 0x1000,
+#define MSG_RST		MSG_RST
+    MSG_ERRQUEUE	= 0x2000, /* Fetch message from error queue.  */
+#define MSG_ERRQUEUE	MSG_ERRQUEUE
+    MSG_NOSIGNAL	= 0x4000, /* Do not generate SIGPIPE.  */
+#define MSG_NOSIGNAL	MSG_NOSIGNAL
+    MSG_MORE		= 0x8000,  /* Sender will send more.  */
+#define MSG_MORE	MSG_MORE
+    MSG_WAITFORONE	= 0x10000, /* Wait for at least one packet to return.*/
+#define MSG_WAITFORONE	MSG_WAITFORONE
+    MSG_FASTOPEN	= 0x20000000, /* Send data in TCP SYN.  */
+#define MSG_FASTOPEN	MSG_FASTOPEN
+
+    MSG_CMSG_CLOEXEC	= 0x40000000	/* Set close_on_exit for file
+					   descriptor received through
+					   SCM_RIGHTS.  */
+#define MSG_CMSG_CLOEXEC MSG_CMSG_CLOEXEC
+  };
+
+
+/* Ancillary data object manipulation macros.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
+#else
+# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
+#endif
+#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
+#define CMSG_FIRSTHDR(mhdr) \
+  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
+   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)
+#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
+			 & (size_t) ~(sizeof (size_t) - 1))
+#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
+			 + CMSG_ALIGN (sizeof (struct cmsghdr)))
+#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
+
+extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
+				      struct cmsghdr *__cmsg) __THROW;
+#ifdef __USE_EXTERN_INLINES
+# ifndef _EXTERN_INLINE
+#  define _EXTERN_INLINE __extern_inline
+# endif
+_EXTERN_INLINE struct cmsghdr *
+__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
+{
+  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
+    /* The kernel header does this so there may be a reason.  */
+    return (struct cmsghdr *) 0;
+
+  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
+			       + CMSG_ALIGN (__cmsg->cmsg_len));
+  if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
+					+ __mhdr->msg_controllen)
+      || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
+	  > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
+    /* No more entries.  */
+    return (struct cmsghdr *) 0;
+  return __cmsg;
+}
+#endif	/* Use `extern inline'.  */
+
+/* Socket level message types.  This must match the definitions in
+   <linux/socket.h>.  */
+enum
+  {
+    SCM_RIGHTS = 0x01		/* Transfer file descriptors.  */
+#define SCM_RIGHTS SCM_RIGHTS
+#ifdef __USE_GNU
+    , SCM_CREDENTIALS = 0x02	/* Credentials passing.  */
+# define SCM_CREDENTIALS SCM_CREDENTIALS
+#endif
+  };
+
+#ifdef __USE_GNU
+/* User visible structure for SCM_CREDENTIALS message */
+struct ucred
+{
+  pid_t pid;			/* PID of sending process.  */
+  uid_t uid;			/* UID of sending process.  */
+  gid_t gid;			/* GID of sending process.  */
+};
+#endif
+
+/* Ugly workaround for unclean kernel headers.  */
+#ifndef __USE_MISC
+# ifndef FIOGETOWN
+#  define __SYS_SOCKET_H_undef_FIOGETOWN
+# endif
+# ifndef FIOSETOWN
+#  define __SYS_SOCKET_H_undef_FIOSETOWN
+# endif
+# ifndef SIOCATMARK
+#  define __SYS_SOCKET_H_undef_SIOCATMARK
+# endif
+# ifndef SIOCGPGRP
+#  define __SYS_SOCKET_H_undef_SIOCGPGRP
+# endif
+# ifndef SIOCGSTAMP
+#  define __SYS_SOCKET_H_undef_SIOCGSTAMP
+# endif
+# ifndef SIOCGSTAMPNS
+#  define __SYS_SOCKET_H_undef_SIOCGSTAMPNS
+# endif
+# ifndef SIOCSPGRP
+#  define __SYS_SOCKET_H_undef_SIOCSPGRP
+# endif
+#endif
+
+/* Get socket manipulation related informations from kernel headers.  */
+#include <asm/socket.h>
+
+#ifndef __USE_MISC
+# ifdef __SYS_SOCKET_H_undef_FIOGETOWN
+#  undef __SYS_SOCKET_H_undef_FIOGETOWN
+#  undef FIOGETOWN
+# endif
+# ifdef __SYS_SOCKET_H_undef_FIOSETOWN
+#  undef __SYS_SOCKET_H_undef_FIOSETOWN
+#  undef FIOSETOWN
+# endif
+# ifdef __SYS_SOCKET_H_undef_SIOCATMARK
+#  undef __SYS_SOCKET_H_undef_SIOCATMARK
+#  undef SIOCATMARK
+# endif
+# ifdef __SYS_SOCKET_H_undef_SIOCGPGRP
+#  undef __SYS_SOCKET_H_undef_SIOCGPGRP
+#  undef SIOCGPGRP
+# endif
+# ifdef __SYS_SOCKET_H_undef_SIOCGSTAMP
+#  undef __SYS_SOCKET_H_undef_SIOCGSTAMP
+#  undef SIOCGSTAMP
+# endif
+# ifdef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
+#  undef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
+#  undef SIOCGSTAMPNS
+# endif
+# ifdef __SYS_SOCKET_H_undef_SIOCSPGRP
+#  undef __SYS_SOCKET_H_undef_SIOCSPGRP
+#  undef SIOCSPGRP
+# endif
+#endif
+
+/* Structure used to manipulate the SO_LINGER option.  */
+struct linger
+  {
+    int l_onoff;		/* Nonzero to linger on close.  */
+    int l_linger;		/* Time to linger.  */
+  };
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
deleted file mode 100644
index 0581c79..0000000
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ /dev/null
@@ -1,389 +0,0 @@
-/* System-specific socket constants and types.  Linux version.
-   Copyright (C) 1991-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef __BITS_SOCKET_H
-#define __BITS_SOCKET_H
-
-#ifndef _SYS_SOCKET_H
-# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
-#endif
-
-#define __need_size_t
-#include <stddef.h>
-
-#include <sys/types.h>
-
-/* Type for length arguments in socket calls.  */
-#ifndef __socklen_t_defined
-typedef __socklen_t socklen_t;
-# define __socklen_t_defined
-#endif
-
-/* Get the architecture-dependent definition of enum __socket_type.  */
-#include <bits/socket_type.h>
-
-/* Protocol families.  */
-#define PF_UNSPEC	0	/* Unspecified.  */
-#define PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
-#define PF_UNIX		PF_LOCAL /* POSIX name for PF_LOCAL.  */
-#define PF_FILE		PF_LOCAL /* Another non-standard name for PF_LOCAL.  */
-#define PF_INET		2	/* IP protocol family.  */
-#define PF_AX25		3	/* Amateur Radio AX.25.  */
-#define PF_IPX		4	/* Novell Internet Protocol.  */
-#define PF_APPLETALK	5	/* Appletalk DDP.  */
-#define PF_NETROM	6	/* Amateur radio NetROM.  */
-#define PF_BRIDGE	7	/* Multiprotocol bridge.  */
-#define PF_ATMPVC	8	/* ATM PVCs.  */
-#define PF_X25		9	/* Reserved for X.25 project.  */
-#define PF_INET6	10	/* IP version 6.  */
-#define PF_ROSE		11	/* Amateur Radio X.25 PLP.  */
-#define PF_DECnet	12	/* Reserved for DECnet project.  */
-#define PF_NETBEUI	13	/* Reserved for 802.2LLC project.  */
-#define PF_SECURITY	14	/* Security callback pseudo AF.  */
-#define PF_KEY		15	/* PF_KEY key management API.  */
-#define PF_NETLINK	16
-#define PF_ROUTE	PF_NETLINK /* Alias to emulate 4.4BSD.  */
-#define PF_PACKET	17	/* Packet family.  */
-#define PF_ASH		18	/* Ash.  */
-#define PF_ECONET	19	/* Acorn Econet.  */
-#define PF_ATMSVC	20	/* ATM SVCs.  */
-#define PF_RDS		21	/* RDS sockets.  */
-#define PF_SNA		22	/* Linux SNA Project */
-#define PF_IRDA		23	/* IRDA sockets.  */
-#define PF_PPPOX	24	/* PPPoX sockets.  */
-#define PF_WANPIPE	25	/* Wanpipe API sockets.  */
-#define PF_LLC		26	/* Linux LLC.  */
-#define PF_IB		27	/* Native InfiniBand address.  */
-#define PF_MPLS		28	/* MPLS.  */
-#define PF_CAN		29	/* Controller Area Network.  */
-#define PF_TIPC		30	/* TIPC sockets.  */
-#define PF_BLUETOOTH	31	/* Bluetooth sockets.  */
-#define PF_IUCV		32	/* IUCV sockets.  */
-#define PF_RXRPC	33	/* RxRPC sockets.  */
-#define PF_ISDN		34	/* mISDN sockets.  */
-#define PF_PHONET	35	/* Phonet sockets.  */
-#define PF_IEEE802154	36	/* IEEE 802.15.4 sockets.  */
-#define PF_CAIF		37	/* CAIF sockets.  */
-#define PF_ALG		38	/* Algorithm sockets.  */
-#define PF_NFC		39	/* NFC sockets.  */
-#define PF_VSOCK	40	/* vSockets.  */
-#define PF_MAX		41	/* For now..  */
-
-/* Address families.  */
-#define AF_UNSPEC	PF_UNSPEC
-#define AF_LOCAL	PF_LOCAL
-#define AF_UNIX		PF_UNIX
-#define AF_FILE		PF_FILE
-#define AF_INET		PF_INET
-#define AF_AX25		PF_AX25
-#define AF_IPX		PF_IPX
-#define AF_APPLETALK	PF_APPLETALK
-#define AF_NETROM	PF_NETROM
-#define AF_BRIDGE	PF_BRIDGE
-#define AF_ATMPVC	PF_ATMPVC
-#define AF_X25		PF_X25
-#define AF_INET6	PF_INET6
-#define AF_ROSE		PF_ROSE
-#define AF_DECnet	PF_DECnet
-#define AF_NETBEUI	PF_NETBEUI
-#define AF_SECURITY	PF_SECURITY
-#define AF_KEY		PF_KEY
-#define AF_NETLINK	PF_NETLINK
-#define AF_ROUTE	PF_ROUTE
-#define AF_PACKET	PF_PACKET
-#define AF_ASH		PF_ASH
-#define AF_ECONET	PF_ECONET
-#define AF_ATMSVC	PF_ATMSVC
-#define AF_RDS		PF_RDS
-#define AF_SNA		PF_SNA
-#define AF_IRDA		PF_IRDA
-#define AF_PPPOX	PF_PPPOX
-#define AF_WANPIPE	PF_WANPIPE
-#define AF_LLC		PF_LLC
-#define AF_IB		PF_IB
-#define AF_MPLS		PF_MPLS
-#define AF_CAN		PF_CAN
-#define AF_TIPC		PF_TIPC
-#define AF_BLUETOOTH	PF_BLUETOOTH
-#define AF_IUCV		PF_IUCV
-#define AF_RXRPC	PF_RXRPC
-#define AF_ISDN		PF_ISDN
-#define AF_PHONET	PF_PHONET
-#define AF_IEEE802154	PF_IEEE802154
-#define AF_CAIF		PF_CAIF
-#define AF_ALG		PF_ALG
-#define AF_NFC		PF_NFC
-#define AF_VSOCK	PF_VSOCK
-#define AF_MAX		PF_MAX
-
-/* Socket level values.  Others are defined in the appropriate headers.
-
-   XXX These definitions also should go into the appropriate headers as
-   far as they are available.  */
-#define SOL_RAW		255
-#define SOL_DECNET      261
-#define SOL_X25         262
-#define SOL_PACKET	263
-#define SOL_ATM		264	/* ATM layer (cell level).  */
-#define SOL_AAL		265	/* ATM Adaption Layer (packet level).  */
-#define SOL_IRDA	266
-
-/* Maximum queue length specifiable by listen.  */
-#define SOMAXCONN	128
-
-/* Get the definition of the macro to define the common sockaddr members.  */
-#include <bits/sockaddr.h>
-
-/* Structure describing a generic socket address.  */
-struct sockaddr
-  {
-    __SOCKADDR_COMMON (sa_);	/* Common data: address family and length.  */
-    char sa_data[14];		/* Address data.  */
-  };
-
-
-/* Structure large enough to hold any socket address (with the historical
-   exception of AF_UNIX).  We reserve 128 bytes.  */
-#define __ss_aligntype	unsigned long int
-#define _SS_SIZE	128
-#define _SS_PADSIZE	(_SS_SIZE - (2 * sizeof (__ss_aligntype)))
-
-struct sockaddr_storage
-  {
-    __SOCKADDR_COMMON (ss_);	/* Address family, etc.  */
-    __ss_aligntype __ss_align;	/* Force desired alignment.  */
-    char __ss_padding[_SS_PADSIZE];
-  };
-
-
-/* Bits in the FLAGS argument to `send', `recv', et al.  */
-enum
-  {
-    MSG_OOB		= 0x01,	/* Process out-of-band data.  */
-#define MSG_OOB		MSG_OOB
-    MSG_PEEK		= 0x02,	/* Peek at incoming messages.  */
-#define MSG_PEEK	MSG_PEEK
-    MSG_DONTROUTE	= 0x04,	/* Don't use local routing.  */
-#define MSG_DONTROUTE	MSG_DONTROUTE
-#ifdef __USE_GNU
-    /* DECnet uses a different name.  */
-    MSG_TRYHARD		= MSG_DONTROUTE,
-# define MSG_TRYHARD	MSG_DONTROUTE
-#endif
-    MSG_CTRUNC		= 0x08,	/* Control data lost before delivery.  */
-#define MSG_CTRUNC	MSG_CTRUNC
-    MSG_PROXY		= 0x10,	/* Supply or ask second address.  */
-#define MSG_PROXY	MSG_PROXY
-    MSG_TRUNC		= 0x20,
-#define MSG_TRUNC	MSG_TRUNC
-    MSG_DONTWAIT	= 0x40, /* Nonblocking IO.  */
-#define MSG_DONTWAIT	MSG_DONTWAIT
-    MSG_EOR		= 0x80, /* End of record.  */
-#define MSG_EOR		MSG_EOR
-    MSG_WAITALL		= 0x100, /* Wait for a full request.  */
-#define MSG_WAITALL	MSG_WAITALL
-    MSG_FIN		= 0x200,
-#define MSG_FIN		MSG_FIN
-    MSG_SYN		= 0x400,
-#define MSG_SYN		MSG_SYN
-    MSG_CONFIRM		= 0x800, /* Confirm path validity.  */
-#define MSG_CONFIRM	MSG_CONFIRM
-    MSG_RST		= 0x1000,
-#define MSG_RST		MSG_RST
-    MSG_ERRQUEUE	= 0x2000, /* Fetch message from error queue.  */
-#define MSG_ERRQUEUE	MSG_ERRQUEUE
-    MSG_NOSIGNAL	= 0x4000, /* Do not generate SIGPIPE.  */
-#define MSG_NOSIGNAL	MSG_NOSIGNAL
-    MSG_MORE		= 0x8000,  /* Sender will send more.  */
-#define MSG_MORE	MSG_MORE
-    MSG_WAITFORONE	= 0x10000, /* Wait for at least one packet to return.*/
-#define MSG_WAITFORONE	MSG_WAITFORONE
-    MSG_FASTOPEN	= 0x20000000, /* Send data in TCP SYN.  */
-#define MSG_FASTOPEN	MSG_FASTOPEN
-
-    MSG_CMSG_CLOEXEC	= 0x40000000	/* Set close_on_exit for file
-					   descriptor received through
-					   SCM_RIGHTS.  */
-#define MSG_CMSG_CLOEXEC MSG_CMSG_CLOEXEC
-  };
-
-
-/* Structure describing messages sent by
-   `sendmsg' and received by `recvmsg'.  */
-struct msghdr
-  {
-    void *msg_name;		/* Address to send to/receive from.  */
-    socklen_t msg_namelen;	/* Length of address data.  */
-
-    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
-    size_t msg_iovlen;		/* Number of elements in the vector.  */
-
-    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
-    size_t msg_controllen;	/* Ancillary data buffer length.
-				   !! The type should be socklen_t but the
-				   definition of the kernel is incompatible
-				   with this.  */
-
-    int msg_flags;		/* Flags on received message.  */
-  };
-
-/* Structure used for storage of ancillary data object information.  */
-struct cmsghdr
-  {
-    size_t cmsg_len;		/* Length of data in cmsg_data plus length
-				   of cmsghdr structure.
-				   !! The type should be socklen_t but the
-				   definition of the kernel is incompatible
-				   with this.  */
-    int cmsg_level;		/* Originating protocol.  */
-    int cmsg_type;		/* Protocol specific type.  */
-#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
-    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
-#endif
-  };
-
-/* Ancillary data object manipulation macros.  */
-#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
-# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
-#else
-# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
-#endif
-#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
-#define CMSG_FIRSTHDR(mhdr) \
-  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
-   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)
-#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
-			 & (size_t) ~(sizeof (size_t) - 1))
-#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
-			 + CMSG_ALIGN (sizeof (struct cmsghdr)))
-#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
-
-extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
-				      struct cmsghdr *__cmsg) __THROW;
-#ifdef __USE_EXTERN_INLINES
-# ifndef _EXTERN_INLINE
-#  define _EXTERN_INLINE __extern_inline
-# endif
-_EXTERN_INLINE struct cmsghdr *
-__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
-{
-  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
-    /* The kernel header does this so there may be a reason.  */
-    return (struct cmsghdr *) 0;
-
-  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
-			       + CMSG_ALIGN (__cmsg->cmsg_len));
-  if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
-					+ __mhdr->msg_controllen)
-      || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
-	  > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
-    /* No more entries.  */
-    return (struct cmsghdr *) 0;
-  return __cmsg;
-}
-#endif	/* Use `extern inline'.  */
-
-/* Socket level message types.  This must match the definitions in
-   <linux/socket.h>.  */
-enum
-  {
-    SCM_RIGHTS = 0x01		/* Transfer file descriptors.  */
-#define SCM_RIGHTS SCM_RIGHTS
-#ifdef __USE_GNU
-    , SCM_CREDENTIALS = 0x02	/* Credentials passing.  */
-# define SCM_CREDENTIALS SCM_CREDENTIALS
-#endif
-  };
-
-#ifdef __USE_GNU
-/* User visible structure for SCM_CREDENTIALS message */
-struct ucred
-{
-  pid_t pid;			/* PID of sending process.  */
-  uid_t uid;			/* UID of sending process.  */
-  gid_t gid;			/* GID of sending process.  */
-};
-#endif
-
-/* Ugly workaround for unclean kernel headers.  */
-#ifndef __USE_MISC
-# ifndef FIOGETOWN
-#  define __SYS_SOCKET_H_undef_FIOGETOWN
-# endif
-# ifndef FIOSETOWN
-#  define __SYS_SOCKET_H_undef_FIOSETOWN
-# endif
-# ifndef SIOCATMARK
-#  define __SYS_SOCKET_H_undef_SIOCATMARK
-# endif
-# ifndef SIOCGPGRP
-#  define __SYS_SOCKET_H_undef_SIOCGPGRP
-# endif
-# ifndef SIOCGSTAMP
-#  define __SYS_SOCKET_H_undef_SIOCGSTAMP
-# endif
-# ifndef SIOCGSTAMPNS
-#  define __SYS_SOCKET_H_undef_SIOCGSTAMPNS
-# endif
-# ifndef SIOCSPGRP
-#  define __SYS_SOCKET_H_undef_SIOCSPGRP
-# endif
-#endif
-
-/* Get socket manipulation related informations from kernel headers.  */
-#include <asm/socket.h>
-
-#ifndef __USE_MISC
-# ifdef __SYS_SOCKET_H_undef_FIOGETOWN
-#  undef __SYS_SOCKET_H_undef_FIOGETOWN
-#  undef FIOGETOWN
-# endif
-# ifdef __SYS_SOCKET_H_undef_FIOSETOWN
-#  undef __SYS_SOCKET_H_undef_FIOSETOWN
-#  undef FIOSETOWN
-# endif
-# ifdef __SYS_SOCKET_H_undef_SIOCATMARK
-#  undef __SYS_SOCKET_H_undef_SIOCATMARK
-#  undef SIOCATMARK
-# endif
-# ifdef __SYS_SOCKET_H_undef_SIOCGPGRP
-#  undef __SYS_SOCKET_H_undef_SIOCGPGRP
-#  undef SIOCGPGRP
-# endif
-# ifdef __SYS_SOCKET_H_undef_SIOCGSTAMP
-#  undef __SYS_SOCKET_H_undef_SIOCGSTAMP
-#  undef SIOCGSTAMP
-# endif
-# ifdef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
-#  undef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
-#  undef SIOCGSTAMPNS
-# endif
-# ifdef __SYS_SOCKET_H_undef_SIOCSPGRP
-#  undef __SYS_SOCKET_H_undef_SIOCSPGRP
-#  undef SIOCSPGRP
-# endif
-#endif
-
-/* Structure used to manipulate the SO_LINGER option.  */
-struct linger
-  {
-    int l_onoff;		/* Nonzero to linger on close.  */
-    int l_linger;		/* Time to linger.  */
-  };
-
-#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/socket.h b/sysdeps/unix/sysv/linux/hppa/bits/socket.h
new file mode 100644
index 0000000..4702324
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/hppa/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  HPPA Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_HPPA_SOCKET_H
+#define __BITS_HPPA_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/i386/bits/socket.h b/sysdeps/unix/sysv/linux/i386/bits/socket.h
new file mode 100644
index 0000000..2ce4737
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/bits/socket.h
@@ -0,0 +1,71 @@
+/* System-specific socket constants and types.  i386 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_I386_SOCKET_H
+#define __BITS_I386_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+#if __BYTE_ORDER == __BIG_ENDIAN
+    int __glibc_reserved1;	/* Pad to adjust Linux size to POSIX defined
+				   one.  */
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+#else
+    socklen_t cmsg_len;
+    int __glibc_reserved1;
+#endif
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/socket.h b/sysdeps/unix/sysv/linux/ia64/bits/socket.h
new file mode 100644
index 0000000..9606973
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  IA64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_IA64_SOCKET_H
+#define __BITS_IA64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/m68k/bits/socket.h b/sysdeps/unix/sysv/linux/m68k/bits/socket.h
new file mode 100644
index 0000000..7048cc5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/m68k/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  m68k Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_M68K_SOCKET_H
+#define __BITS_M68K_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/microblaze/bits/socket.h b/sysdeps/unix/sysv/linux/microblaze/bits/socket.h
new file mode 100644
index 0000000..57ff1d4
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/microblaze/bits/socket.h
@@ -0,0 +1,71 @@
+/* System-specific socket constants and types.  Microblaze Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_MICROBLAZE_SOCKET_H
+#define __BITS_MICROBLAZE_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+#if __BYTE_ORDER == __BIG_ENDIAN
+    int __glibc_reserved1;	/* Pad to adjust Linux size to POSIX defined
+				   one.  */
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+#else
+    socklen_t cmsg_len;
+    int __glibc_reserved1;
+#endif
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h b/sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h
new file mode 100644
index 0000000..ac59a9f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  MIPS32 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_MIPS32_SOCKET_H
+#define __BITS_MIPS32_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h b/sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h
new file mode 100644
index 0000000..f5f735d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  MIPS64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_MIPS64_SOCKET_H
+#define __BITS_MIPS64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/nios2/bits/socket.h b/sysdeps/unix/sysv/linux/nios2/bits/socket.h
new file mode 100644
index 0000000..eaa51e8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  NIOS2 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_NIOS2_SOCKET_H
+#define __BITS_NIOS2_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/bits/socket.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/bits/socket.h
new file mode 100644
index 0000000..9e128d7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  PowerPC32 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_POWERPC32_SOCKET_H
+#define __BITS_POWERPC32_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/socket.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/socket.h
new file mode 100644
index 0000000..008f34a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  PowerPC64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_POWERPC64_SOCKET_H
+#define __BITS_POWERPC64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h b/sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h
new file mode 100644
index 0000000..ead5727
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  S390 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_S390_SOCKET_H
+#define __BITS_S390_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h b/sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h
new file mode 100644
index 0000000..3b7fe04
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  S390x Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_S390X_SOCKET_H
+#define __BITS_S390X_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/sh/bits/socket.h b/sysdeps/unix/sysv/linux/sh/bits/socket.h
new file mode 100644
index 0000000..04008ff
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sh/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  SH Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_SH_SOCKET_H
+#define __BITS_SH_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/bits/socket.h b/sysdeps/unix/sysv/linux/sparc/sparc32/bits/socket.h
new file mode 100644
index 0000000..85e6d12
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  SPARC32 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_SPARC32_SOCKET_H
+#define __BITS_SPARC32_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h b/sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h
new file mode 100644
index 0000000..2910f68
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  SPARC64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_SPARC64_SOCKET_H
+#define __BITS_SPARC64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h b/sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h
new file mode 100644
index 0000000..b434819
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  TileGX Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_TILEGX_SOCKET_H
+#define __BITS_TILEGX_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h b/sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h
new file mode 100644
index 0000000..9bf74f2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h
@@ -0,0 +1,64 @@
+/* System-specific socket constants and types.  Tile Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_TILE_SOCKET_H
+#define __BITS_TILE_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by `sendmsg' and received by 
+   `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    int msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    socklen_t msg_controllen;	/* Ancillary data buffer length.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    socklen_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.  */
+
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
diff --git a/sysdeps/unix/sysv/linux/x86_64/bits/socket.h b/sysdeps/unix/sysv/linux/x86_64/bits/socket.h
new file mode 100644
index 0000000..ab935f5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/bits/socket.h
@@ -0,0 +1,69 @@
+/* System-specific socket constants and types.  x86_64 Linux.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef __BITS_X86_64_SOCKET_H
+#define __BITS_X86_64_SOCKET_H
+
+#ifndef _SYS_SOCKET_H
+# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
+#endif
+
+/* Type for length arguments in socket calls.  */
+#ifndef __socklen_t_defined
+typedef __socklen_t socklen_t;
+# define __socklen_t_defined
+#endif
+
+/* Structure describing messages sent by
+   `sendmsg' and received by `recvmsg'.  */
+struct msghdr
+  {
+    void *msg_name;		/* Address to send to/receive from.  */
+    socklen_t msg_namelen;	/* Length of address data.  */
+
+    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
+    size_t msg_iovlen;		/* Number of elements in the vector.  */
+
+    void *msg_control;		/* Ancillary data (eg BSD filedesc passing). */
+    size_t msg_controllen;	/* Ancillary data buffer length.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+
+    int msg_flags;		/* Flags on received message.  */
+  };
+
+/* Structure used for storage of ancillary data object information.  */
+struct cmsghdr
+  {
+    size_t cmsg_len;		/* Length of data in cmsg_data plus length
+				   of cmsghdr structure.
+				   !! The type should be socklen_t but the
+				   definition of the kernel is incompatible
+				   with this.  */
+    int cmsg_level;		/* Originating protocol.  */
+    int cmsg_type;		/* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
+#endif
+  };
+
+/* Include generic Linux declarations.  */
+#include <bits/socket-linux.h>
+
+#endif	/* bits/socket.h */
