1 # sys_socket_h.m4 serial 25
2 dnl Copyright (C) 2005-2020 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_CANONICAL_HOST])
14 dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
15 dnl old-style declarations (with return type 'int' instead of 'ssize_t')
16 dnl unless _POSIX_PII_SOCKET is defined.
19 AC_DEFINE([_POSIX_PII_SOCKET], [1],
20 [Define to 1 in order to get the POSIX compatible declarations
21 of socket functions.])
25 AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
26 [gl_cv_header_sys_socket_h_selfcontained],
28 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
29 [gl_cv_header_sys_socket_h_selfcontained=yes],
30 [gl_cv_header_sys_socket_h_selfcontained=no])
32 if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
33 dnl If the shutdown function exists, <sys/socket.h> should define
34 dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
35 AC_CHECK_FUNCS([shutdown])
36 if test $ac_cv_func_shutdown = yes; then
37 AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
38 [gl_cv_header_sys_socket_h_shut],
41 [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
42 [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
43 [gl_cv_header_sys_socket_h_shut=yes],
44 [gl_cv_header_sys_socket_h_shut=no])
46 if test $gl_cv_header_sys_socket_h_shut = no; then
47 SYS_SOCKET_H='sys/socket.h'
51 # We need to check for ws2tcpip.h now.
52 gl_PREREQ_SYS_H_SOCKET
53 AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
54 /* sys/types.h is not needed according to POSIX, but the
55 sys/socket.h in i386-unknown-freebsd4.10 and
56 powerpc-apple-darwin5.5 required it. */
57 #include <sys/types.h>
58 #ifdef HAVE_SYS_SOCKET_H
59 #include <sys/socket.h>
61 #ifdef HAVE_WS2TCPIP_H
65 if test $ac_cv_type_struct_sockaddr_storage = no; then
66 HAVE_STRUCT_SOCKADDR_STORAGE=0
68 if test $ac_cv_type_sa_family_t = no; then
71 if test $ac_cv_type_struct_sockaddr_storage != no; then
72 AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
74 [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
75 [#include <sys/types.h>
76 #ifdef HAVE_SYS_SOCKET_H
77 #include <sys/socket.h>
79 #ifdef HAVE_WS2TCPIP_H
84 if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
85 || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
86 SYS_SOCKET_H='sys/socket.h'
88 gl_PREREQ_SYS_H_WINSOCK2
90 dnl Check for declarations of anything we want to poison if the
91 dnl corresponding gnulib module is not in use.
92 gl_WARN_ON_USE_PREPARE([[
93 /* Some systems require prerequisite headers. */
94 #include <sys/types.h>
95 #include <sys/socket.h>
96 ]], [socket connect accept bind getpeername getsockname getsockopt
97 listen recv send recvfrom sendto setsockopt shutdown accept4])
99 AC_REQUIRE([AC_C_RESTRICT])
102 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
104 dnl Check prerequisites of the <sys/socket.h> replacement.
105 AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
106 gl_CHECK_NEXT_HEADERS([sys/socket.h])
107 if test $ac_cv_header_sys_socket_h = yes; then
112 AC_SUBST([HAVE_SYS_SOCKET_H])
113 gl_PREREQ_SYS_H_WS2TCPIP
116 # Common prerequisites of the <sys/socket.h> replacement and of the
117 # <sys/select.h> replacement.
118 # Sets and substitutes HAVE_WINSOCK2_H.
119 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
121 m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
122 m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
123 AC_CHECK_HEADERS_ONCE([sys/socket.h])
124 if test $ac_cv_header_sys_socket_h != yes; then
125 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
126 dnl the check for those headers unconditional; yet cygwin reports
127 dnl that the headers are present but cannot be compiled (since on
128 dnl cygwin, all socket information should come from sys/socket.h).
129 AC_CHECK_HEADERS([winsock2.h])
131 if test "$ac_cv_header_winsock2_h" = yes; then
133 UNISTD_H_HAVE_WINSOCK2_H=1
134 SYS_IOCTL_H_HAVE_WINSOCK2_H=1
138 AC_SUBST([HAVE_WINSOCK2_H])
141 # Common prerequisites of the <sys/socket.h> replacement and of the
142 # <arpa/inet.h> replacement.
143 # Sets and substitutes HAVE_WS2TCPIP_H.
144 AC_DEFUN([gl_PREREQ_SYS_H_WS2TCPIP],
146 AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
147 if test $ac_cv_header_sys_socket_h = yes; then
150 if test $ac_cv_header_ws2tcpip_h = yes; then
156 AC_SUBST([HAVE_WS2TCPIP_H])
159 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
161 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
162 AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
163 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
164 dnl Define it also as a C macro, for the benefit of the unit tests.
165 gl_MODULE_INDICATOR_FOR_TESTS([$1])
168 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
170 GNULIB_SOCKET=0; AC_SUBST([GNULIB_SOCKET])
171 GNULIB_CONNECT=0; AC_SUBST([GNULIB_CONNECT])
172 GNULIB_ACCEPT=0; AC_SUBST([GNULIB_ACCEPT])
173 GNULIB_BIND=0; AC_SUBST([GNULIB_BIND])
174 GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
175 GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
176 GNULIB_GETSOCKOPT=0; AC_SUBST([GNULIB_GETSOCKOPT])
177 GNULIB_LISTEN=0; AC_SUBST([GNULIB_LISTEN])
178 GNULIB_RECV=0; AC_SUBST([GNULIB_RECV])
179 GNULIB_SEND=0; AC_SUBST([GNULIB_SEND])
180 GNULIB_RECVFROM=0; AC_SUBST([GNULIB_RECVFROM])
181 GNULIB_SENDTO=0; AC_SUBST([GNULIB_SENDTO])
182 GNULIB_SETSOCKOPT=0; AC_SUBST([GNULIB_SETSOCKOPT])
183 GNULIB_SHUTDOWN=0; AC_SUBST([GNULIB_SHUTDOWN])
184 GNULIB_ACCEPT4=0; AC_SUBST([GNULIB_ACCEPT4])
185 HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
186 HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
187 AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
188 HAVE_SA_FAMILY_T=1; AC_SUBST([HAVE_SA_FAMILY_T])
189 HAVE_ACCEPT4=1; AC_SUBST([HAVE_ACCEPT4])