1 # sys_socket_h.m4 serial 19
2 dnl Copyright (C) 2005-2010 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Simon Josefsson.
9 AC_DEFUN([gl_HEADER_SYS_SOCKET],
11 AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
12 AC_REQUIRE([AC_C_INLINE])
14 AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
15 [gl_cv_header_sys_socket_h_selfcontained],
17 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
18 [gl_cv_header_sys_socket_h_selfcontained=yes],
19 [gl_cv_header_sys_socket_h_selfcontained=no])
21 if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
22 dnl If the shutdown function exists, <sys/socket.h> should define
23 dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
24 AC_CHECK_FUNCS([shutdown])
25 if test $ac_cv_func_shutdown = yes; then
26 AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
27 [gl_cv_header_sys_socket_h_shut],
30 [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
31 [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
32 [gl_cv_header_sys_socket_h_shut=yes],
33 [gl_cv_header_sys_socket_h_shut=no])
35 if test $gl_cv_header_sys_socket_h_shut = no; then
36 SYS_SOCKET_H='sys/socket.h'
40 # We need to check for ws2tcpip.h now.
41 gl_PREREQ_SYS_H_SOCKET
42 AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
43 /* sys/types.h is not needed according to POSIX, but the
44 sys/socket.h in i386-unknown-freebsd4.10 and
45 powerpc-apple-darwin5.5 required it. */
46 #include <sys/types.h>
47 #ifdef HAVE_SYS_SOCKET_H
48 #include <sys/socket.h>
50 #ifdef HAVE_WS2TCPIP_H
54 if test $ac_cv_type_struct_sockaddr_storage = no; then
55 HAVE_STRUCT_SOCKADDR_STORAGE=0
57 if test $ac_cv_type_sa_family_t = no; then
60 gl_PREREQ_SYS_H_WINSOCK2
62 dnl Check for declarations of anything we want to poison if the
63 dnl corresponding gnulib module is not in use.
64 gl_WARN_ON_USE_PREPARE([[
65 /* Some systems require prerequisite headers. */
66 #include <sys/types.h>
67 #include <sys/socket.h>
68 ]], [socket connect accept bind getpeername getsockname getsockopt
69 listen recv send recvfrom sendto setsockopt shutdown accept4])
72 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
74 dnl Check prerequisites of the <sys/socket.h> replacement.
75 gl_CHECK_NEXT_HEADERS([sys/socket.h])
76 if test $ac_cv_header_sys_socket_h = yes; then
81 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
82 dnl the check for those headers unconditional; yet cygwin reports
83 dnl that the headers are present but cannot be compiled (since on
84 dnl cygwin, all socket information should come from sys/socket.h).
85 AC_CHECK_HEADERS([ws2tcpip.h])
86 if test $ac_cv_header_ws2tcpip_h = yes; then
92 AC_SUBST([HAVE_SYS_SOCKET_H])
93 AC_SUBST([HAVE_WS2TCPIP_H])
96 # Common prerequisites of the <sys/socket.h> replacement and of the
97 # <sys/select.h> replacement.
98 # Sets and substitutes HAVE_WINSOCK2_H.
99 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
101 m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
102 m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
103 AC_CHECK_HEADERS_ONCE([sys/socket.h])
104 if test $ac_cv_header_sys_socket_h != yes; then
105 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
106 dnl the check for those headers unconditional; yet cygwin reports
107 dnl that the headers are present but cannot be compiled (since on
108 dnl cygwin, all socket information should come from sys/socket.h).
109 AC_CHECK_HEADERS([winsock2.h])
111 if test "$ac_cv_header_winsock2_h" = yes; then
113 UNISTD_H_HAVE_WINSOCK2_H=1
114 SYS_IOCTL_H_HAVE_WINSOCK2_H=1
118 AC_SUBST([HAVE_WINSOCK2_H])
121 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
123 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
124 AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
125 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
126 dnl Define it also as a C macro, for the benefit of the unit tests.
127 gl_MODULE_INDICATOR_FOR_TESTS([$1])
130 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
132 GNULIB_SOCKET=0; AC_SUBST([GNULIB_SOCKET])
133 GNULIB_CONNECT=0; AC_SUBST([GNULIB_CONNECT])
134 GNULIB_ACCEPT=0; AC_SUBST([GNULIB_ACCEPT])
135 GNULIB_BIND=0; AC_SUBST([GNULIB_BIND])
136 GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
137 GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
138 GNULIB_GETSOCKOPT=0; AC_SUBST([GNULIB_GETSOCKOPT])
139 GNULIB_LISTEN=0; AC_SUBST([GNULIB_LISTEN])
140 GNULIB_RECV=0; AC_SUBST([GNULIB_RECV])
141 GNULIB_SEND=0; AC_SUBST([GNULIB_SEND])
142 GNULIB_RECVFROM=0; AC_SUBST([GNULIB_RECVFROM])
143 GNULIB_SENDTO=0; AC_SUBST([GNULIB_SENDTO])
144 GNULIB_SETSOCKOPT=0; AC_SUBST([GNULIB_SETSOCKOPT])
145 GNULIB_SHUTDOWN=0; AC_SUBST([GNULIB_SHUTDOWN])
146 GNULIB_ACCEPT4=0; AC_SUBST([GNULIB_ACCEPT4])
147 HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
148 HAVE_SA_FAMILY_T=1; AC_SUBST([HAVE_SA_FAMILY_T])
149 HAVE_ACCEPT4=1; AC_SUBST([HAVE_ACCEPT4])