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# sys_socket_h.m4 serial 22
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dnl Copyright (C) 2005-2011 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Simon Josefsson.
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AC_DEFUN([gl_HEADER_SYS_SOCKET],
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AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([AC_C_INLINE])
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dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
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dnl old-style declarations (with return type 'int' instead of 'ssize_t')
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dnl unless _POSIX_PII_SOCKET is defined.
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AC_DEFINE([_POSIX_PII_SOCKET], [1],
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[Define to 1 in order to get the POSIX compatible declarations
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of socket functions.])
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AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
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[gl_cv_header_sys_socket_h_selfcontained],
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
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[gl_cv_header_sys_socket_h_selfcontained=yes],
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[gl_cv_header_sys_socket_h_selfcontained=no])
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if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
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dnl If the shutdown function exists, <sys/socket.h> should define
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dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
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AC_CHECK_FUNCS([shutdown])
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if test $ac_cv_func_shutdown = yes; then
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AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
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[gl_cv_header_sys_socket_h_shut],
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[AC_LANG_PROGRAM([[#include <sys/socket.h>]],
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[[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
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[gl_cv_header_sys_socket_h_shut=yes],
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[gl_cv_header_sys_socket_h_shut=no])
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if test $gl_cv_header_sys_socket_h_shut = no; then
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SYS_SOCKET_H='sys/socket.h'
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# We need to check for ws2tcpip.h now.
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gl_PREREQ_SYS_H_SOCKET
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AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
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/* sys/types.h is not needed according to POSIX, but the
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sys/socket.h in i386-unknown-freebsd4.10 and
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powerpc-apple-darwin5.5 required it. */
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#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#ifdef HAVE_WS2TCPIP_H
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if test $ac_cv_type_struct_sockaddr_storage = no; then
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HAVE_STRUCT_SOCKADDR_STORAGE=0
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if test $ac_cv_type_sa_family_t = no; then
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if test $ac_cv_type_struct_sockaddr_storage != no; then
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AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
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[HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
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[#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#ifdef HAVE_WS2TCPIP_H
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if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
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|| test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
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SYS_SOCKET_H='sys/socket.h'
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gl_PREREQ_SYS_H_WINSOCK2
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dnl Check for declarations of anything we want to poison if the
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dnl corresponding gnulib module is not in use.
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gl_WARN_ON_USE_PREPARE([[
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/* Some systems require prerequisite headers. */
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#include <sys/types.h>
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#include <sys/socket.h>
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]], [socket connect accept bind getpeername getsockname getsockopt
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listen recv send recvfrom sendto setsockopt shutdown accept4])
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AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
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dnl Check prerequisites of the <sys/socket.h> replacement.
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AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
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gl_CHECK_NEXT_HEADERS([sys/socket.h])
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if test $ac_cv_header_sys_socket_h = yes; then
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if test $ac_cv_header_ws2tcpip_h = yes; then
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AC_SUBST([HAVE_SYS_SOCKET_H])
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AC_SUBST([HAVE_WS2TCPIP_H])
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# Common prerequisites of the <sys/socket.h> replacement and of the
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# <sys/select.h> replacement.
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# Sets and substitutes HAVE_WINSOCK2_H.
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AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
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m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
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m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
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AC_CHECK_HEADERS_ONCE([sys/socket.h])
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if test $ac_cv_header_sys_socket_h != yes; then
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dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
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dnl the check for those headers unconditional; yet cygwin reports
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dnl that the headers are present but cannot be compiled (since on
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dnl cygwin, all socket information should come from sys/socket.h).
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AC_CHECK_HEADERS([winsock2.h])
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if test "$ac_cv_header_winsock2_h" = yes; then
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UNISTD_H_HAVE_WINSOCK2_H=1
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SYS_IOCTL_H_HAVE_WINSOCK2_H=1
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AC_SUBST([HAVE_WINSOCK2_H])
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AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
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gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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dnl Define it also as a C macro, for the benefit of the unit tests.
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gl_MODULE_INDICATOR_FOR_TESTS([$1])
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AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
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GNULIB_SOCKET=0; AC_SUBST([GNULIB_SOCKET])
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GNULIB_CONNECT=0; AC_SUBST([GNULIB_CONNECT])
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GNULIB_ACCEPT=0; AC_SUBST([GNULIB_ACCEPT])
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GNULIB_BIND=0; AC_SUBST([GNULIB_BIND])
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GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
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GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
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GNULIB_GETSOCKOPT=0; AC_SUBST([GNULIB_GETSOCKOPT])
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GNULIB_LISTEN=0; AC_SUBST([GNULIB_LISTEN])
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GNULIB_RECV=0; AC_SUBST([GNULIB_RECV])
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GNULIB_SEND=0; AC_SUBST([GNULIB_SEND])
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GNULIB_RECVFROM=0; AC_SUBST([GNULIB_RECVFROM])
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GNULIB_SENDTO=0; AC_SUBST([GNULIB_SENDTO])
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GNULIB_SETSOCKOPT=0; AC_SUBST([GNULIB_SETSOCKOPT])
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GNULIB_SHUTDOWN=0; AC_SUBST([GNULIB_SHUTDOWN])
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GNULIB_ACCEPT4=0; AC_SUBST([GNULIB_ACCEPT4])
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HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
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HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
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AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
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HAVE_SA_FAMILY_T=1; AC_SUBST([HAVE_SA_FAMILY_T])
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HAVE_ACCEPT4=1; AC_SUBST([HAVE_ACCEPT4])
added
removed
m4/sys_socket_h.m4
