diff mbox

[1/4] Add architecture specific socket.h header

Message ID 1458592867-3057-2-git-send-email-adhemerval.zanella@linaro.org
State New
Headers show

Commit Message

Adhemerval Zanella March 21, 2016, 8:41 p.m. UTC
This patch adds architecture specific socket.h header for Linux,
move the default socket.h header to socket-linux.h (in a similar
way done for fcntl.h header), and move the msghdr and cmsghdr
definitions to the architecture specific header.  No functional
changes are done so no code changes are expected.

The rationale is to to fix BZ#16919 (recvmsg standard compliance)
where it requires to change both the msghdr and cmsghdr internal
fields to add padding members if the size_t for the architecture
is larger than the POSIX defined int and socklen_t for the
msg_namelen, msg_controllen, and cmsg_len.

To avoid namespace pollution socket.h can not include limits.h to
get LONG_MAX and INT_MAX, so the option is either using compiler
builtin defintions (__LONG_MAX__ and __INT_MAX__) or by creating
archicteture specific headers.  The first option has the downside
of relying on existense of builtin, which might not be true for all
current compilers.

	* sysdeps/unix/sysv/linux/Makefile
	[$(subdir) = io] (sysdep_headers): Add socket-linux.h.
	* sysdeps/unix/sysv/linux/bits/socket.h: Move to ...
	* sysdeps/unix/sysv/linux/bits/socket-linux.h: ... here.
	* sysdeps/unix/sysv/linux/aarch64/bits/socket.h: New file.
	* sysdeps/unix/sysv/linux/alpha/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/bits/socket.h: Likewise.
---
 sysdeps/unix/sysv/linux/Makefile                   |   2 +-
 sysdeps/unix/sysv/linux/aarch64/bits/socket.h      |  69 ++++
 sysdeps/unix/sysv/linux/alpha/bits/socket.h        |  69 ++++
 sysdeps/unix/sysv/linux/arm/bits/socket.h          |  64 ++++
 sysdeps/unix/sysv/linux/bits/socket-linux.h        | 355 +++++++++++++++++++
 sysdeps/unix/sysv/linux/bits/socket.h              | 389 ---------------------
 sysdeps/unix/sysv/linux/hppa/bits/socket.h         |  64 ++++
 sysdeps/unix/sysv/linux/i386/bits/socket.h         |  71 ++++
 sysdeps/unix/sysv/linux/ia64/bits/socket.h         |  69 ++++
 sysdeps/unix/sysv/linux/m68k/bits/socket.h         |  64 ++++
 sysdeps/unix/sysv/linux/microblaze/bits/socket.h   |  71 ++++
 sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h  |  64 ++++
 sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h  |  69 ++++
 sysdeps/unix/sysv/linux/nios2/bits/socket.h        |  64 ++++
 .../sysv/linux/powerpc/powerpc32/bits/socket.h     |  64 ++++
 .../sysv/linux/powerpc/powerpc64/bits/socket.h     |  69 ++++
 sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h |  64 ++++
 sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h |  69 ++++
 sysdeps/unix/sysv/linux/sh/bits/socket.h           |  64 ++++
 .../unix/sysv/linux/sparc/sparc32/bits/socket.h    |  64 ++++
 .../unix/sysv/linux/sparc/sparc64/bits/socket.h    |  69 ++++
 sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h  |  69 ++++
 sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h |  64 ++++
 sysdeps/unix/sysv/linux/x86_64/bits/socket.h       |  69 ++++
 25 files changed, 1785 insertions(+), 390 deletions(-)
 create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/alpha/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/arm/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/bits/socket-linux.h
 delete mode 100644 sysdeps/unix/sysv/linux/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/i386/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/ia64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/m68k/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/microblaze/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/mips/mips32/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/mips/mips64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/nios2/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/powerpc/powerpc32/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/s390/s390-32/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/sh/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/tile/tilegx/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/tile/tilepro/bits/socket.h
 create mode 100644 sysdeps/unix/sysv/linux/x86_64/bits/socket.h

-- 
1.9.1

Comments

Adhemerval Zanella March 22, 2016, 10:27 a.m. UTC | #1
On 21-03-2016 20:11, Joseph Myers wrote:
> On Mon, 21 Mar 2016, Adhemerval Zanella wrote:

> 

>> To avoid namespace pollution socket.h can not include limits.h to

>> get LONG_MAX and INT_MAX, so the option is either using compiler

>> builtin defintions (__LONG_MAX__ and __INT_MAX__) or by creating

>> archicteture specific headers.  The first option has the downside

>> of relying on existense of builtin, which might not be true for all

>> current compilers.

> 

> The normal approach is to include <bits/wordsize.h>.  That should avoid 

> any need for architecture-specific variants of socket.h.

> 


I though about using __WORDSIZE == 64 as the compiler test to check if
sizeof (size_t) is larger than sizeof (socklen_t), but I was not sure
how safe it is for all the architectures.  It seems to be ok for
all current ports though.  I will change that.
diff mbox

Patch

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 */