Added a gnulib with GPL components for use by applications.
[gnutls:gnutls.git] / src / gl / m4 / sys_socket_h.m4
1 # sys_socket_h.m4 serial 23
2 dnl Copyright (C) 2005-2013 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.
6
7 dnl From Simon Josefsson.
8
9 AC_DEFUN([gl_HEADER_SYS_SOCKET],
10 [
11   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
12   AC_REQUIRE([AC_CANONICAL_HOST])
13
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.
17   case "$host_os" in
18     osf*)
19       AC_DEFINE([_POSIX_PII_SOCKET], [1],
20         [Define to 1 in order to get the POSIX compatible declarations
21          of socket functions.])
22       ;;
23   esac
24
25   AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
26     [gl_cv_header_sys_socket_h_selfcontained],
27     [
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])
31     ])
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],
39         [
40           AC_COMPILE_IFELSE(
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])
45         ])
46       if test $gl_cv_header_sys_socket_h_shut = no; then
47         SYS_SOCKET_H='sys/socket.h'
48       fi
49     fi
50   fi
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>
60 #endif
61 #ifdef HAVE_WS2TCPIP_H
62 #include <ws2tcpip.h>
63 #endif
64 ])
65   if test $ac_cv_type_struct_sockaddr_storage = no; then
66     HAVE_STRUCT_SOCKADDR_STORAGE=0
67   fi
68   if test $ac_cv_type_sa_family_t = no; then
69     HAVE_SA_FAMILY_T=0
70   fi
71   if test $ac_cv_type_struct_sockaddr_storage != no; then
72     AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
73       [],
74       [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
75       [#include <sys/types.h>
76        #ifdef HAVE_SYS_SOCKET_H
77        #include <sys/socket.h>
78        #endif
79        #ifdef HAVE_WS2TCPIP_H
80        #include <ws2tcpip.h>
81        #endif
82       ])
83   fi
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'
87   fi
88   gl_PREREQ_SYS_H_WINSOCK2
89
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])
98 ])
99
100 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
101 [
102   dnl Check prerequisites of the <sys/socket.h> replacement.
103   AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
104   gl_CHECK_NEXT_HEADERS([sys/socket.h])
105   if test $ac_cv_header_sys_socket_h = yes; then
106     HAVE_SYS_SOCKET_H=1
107     HAVE_WS2TCPIP_H=0
108   else
109     HAVE_SYS_SOCKET_H=0
110     if test $ac_cv_header_ws2tcpip_h = yes; then
111       HAVE_WS2TCPIP_H=1
112     else
113       HAVE_WS2TCPIP_H=0
114     fi
115   fi
116   AC_SUBST([HAVE_SYS_SOCKET_H])
117   AC_SUBST([HAVE_WS2TCPIP_H])
118 ])
119
120 # Common prerequisites of the <sys/socket.h> replacement and of the
121 # <sys/select.h> replacement.
122 # Sets and substitutes HAVE_WINSOCK2_H.
123 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
124 [
125   m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
126   m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
127   AC_CHECK_HEADERS_ONCE([sys/socket.h])
128   if test $ac_cv_header_sys_socket_h != yes; then
129     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
130     dnl the check for those headers unconditional; yet cygwin reports
131     dnl that the headers are present but cannot be compiled (since on
132     dnl cygwin, all socket information should come from sys/socket.h).
133     AC_CHECK_HEADERS([winsock2.h])
134   fi
135   if test "$ac_cv_header_winsock2_h" = yes; then
136     HAVE_WINSOCK2_H=1
137     UNISTD_H_HAVE_WINSOCK2_H=1
138     SYS_IOCTL_H_HAVE_WINSOCK2_H=1
139   else
140     HAVE_WINSOCK2_H=0
141   fi
142   AC_SUBST([HAVE_WINSOCK2_H])
143 ])
144
145 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
146 [
147   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
148   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
149   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
150   dnl Define it also as a C macro, for the benefit of the unit tests.
151   gl_MODULE_INDICATOR_FOR_TESTS([$1])
152 ])
153
154 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
155 [
156   GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
157   GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
158   GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
159   GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
160   GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
161   GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
162   GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
163   GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
164   GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
165   GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
166   GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
167   GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
168   GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
169   GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
170   GNULIB_ACCEPT4=0;     AC_SUBST([GNULIB_ACCEPT4])
171   HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
172   HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
173                         AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
174   HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
175   HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])
176 ])