Port to Texinfo 5.0 by backporting trunk 2012-12-22T19:57:35Z!rgm@gnu.org and 2013...
[emacs.git] / m4 / sys_socket_h.m4
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1 # sys_socket_h.m4 serial 22
2 dnl Copyright (C) 2005-2012 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])
13   AC_REQUIRE([AC_C_INLINE])
15   dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
16   dnl old-style declarations (with return type 'int' instead of 'ssize_t')
17   dnl unless _POSIX_PII_SOCKET is defined.
18   case "$host_os" in
19     osf*)
20       AC_DEFINE([_POSIX_PII_SOCKET], [1],
21         [Define to 1 in order to get the POSIX compatible declarations
22          of socket functions.])
23       ;;
24   esac
26   AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
27     [gl_cv_header_sys_socket_h_selfcontained],
28     [
29       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
30         [gl_cv_header_sys_socket_h_selfcontained=yes],
31         [gl_cv_header_sys_socket_h_selfcontained=no])
32     ])
33   if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
34     dnl If the shutdown function exists, <sys/socket.h> should define
35     dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
36     AC_CHECK_FUNCS([shutdown])
37     if test $ac_cv_func_shutdown = yes; then
38       AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
39         [gl_cv_header_sys_socket_h_shut],
40         [
41           AC_COMPILE_IFELSE(
42             [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
43                [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
44             [gl_cv_header_sys_socket_h_shut=yes],
45             [gl_cv_header_sys_socket_h_shut=no])
46         ])
47       if test $gl_cv_header_sys_socket_h_shut = no; then
48         SYS_SOCKET_H='sys/socket.h'
49       fi
50     fi
51   fi
52   # We need to check for ws2tcpip.h now.
53   gl_PREREQ_SYS_H_SOCKET
54   AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
55   /* sys/types.h is not needed according to POSIX, but the
56      sys/socket.h in i386-unknown-freebsd4.10 and
57      powerpc-apple-darwin5.5 required it. */
58 #include <sys/types.h>
59 #ifdef HAVE_SYS_SOCKET_H
60 #include <sys/socket.h>
61 #endif
62 #ifdef HAVE_WS2TCPIP_H
63 #include <ws2tcpip.h>
64 #endif
66   if test $ac_cv_type_struct_sockaddr_storage = no; then
67     HAVE_STRUCT_SOCKADDR_STORAGE=0
68   fi
69   if test $ac_cv_type_sa_family_t = no; then
70     HAVE_SA_FAMILY_T=0
71   fi
72   if test $ac_cv_type_struct_sockaddr_storage != no; then
73     AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
74       [],
75       [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
76       [#include <sys/types.h>
77        #ifdef HAVE_SYS_SOCKET_H
78        #include <sys/socket.h>
79        #endif
80        #ifdef HAVE_WS2TCPIP_H
81        #include <ws2tcpip.h>
82        #endif
83       ])
84   fi
85   if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
86      || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
87     SYS_SOCKET_H='sys/socket.h'
88   fi
89   gl_PREREQ_SYS_H_WINSOCK2
91   dnl Check for declarations of anything we want to poison if the
92   dnl corresponding gnulib module is not in use.
93   gl_WARN_ON_USE_PREPARE([[
94 /* Some systems require prerequisite headers.  */
95 #include <sys/types.h>
96 #include <sys/socket.h>
97     ]], [socket connect accept bind getpeername getsockname getsockopt
98     listen recv send recvfrom sendto setsockopt shutdown accept4])
101 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
103   dnl Check prerequisites of the <sys/socket.h> replacement.
104   AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
105   gl_CHECK_NEXT_HEADERS([sys/socket.h])
106   if test $ac_cv_header_sys_socket_h = yes; then
107     HAVE_SYS_SOCKET_H=1
108     HAVE_WS2TCPIP_H=0
109   else
110     HAVE_SYS_SOCKET_H=0
111     if test $ac_cv_header_ws2tcpip_h = yes; then
112       HAVE_WS2TCPIP_H=1
113     else
114       HAVE_WS2TCPIP_H=0
115     fi
116   fi
117   AC_SUBST([HAVE_SYS_SOCKET_H])
118   AC_SUBST([HAVE_WS2TCPIP_H])
121 # Common prerequisites of the <sys/socket.h> replacement and of the
122 # <sys/select.h> replacement.
123 # Sets and substitutes HAVE_WINSOCK2_H.
124 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
126   m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
127   m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
128   AC_CHECK_HEADERS_ONCE([sys/socket.h])
129   if test $ac_cv_header_sys_socket_h != yes; then
130     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
131     dnl the check for those headers unconditional; yet cygwin reports
132     dnl that the headers are present but cannot be compiled (since on
133     dnl cygwin, all socket information should come from sys/socket.h).
134     AC_CHECK_HEADERS([winsock2.h])
135   fi
136   if test "$ac_cv_header_winsock2_h" = yes; then
137     HAVE_WINSOCK2_H=1
138     UNISTD_H_HAVE_WINSOCK2_H=1
139     SYS_IOCTL_H_HAVE_WINSOCK2_H=1
140   else
141     HAVE_WINSOCK2_H=0
142   fi
143   AC_SUBST([HAVE_WINSOCK2_H])
146 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
148   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
149   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
150   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
151   dnl Define it also as a C macro, for the benefit of the unit tests.
152   gl_MODULE_INDICATOR_FOR_TESTS([$1])
155 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
157   GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
158   GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
159   GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
160   GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
161   GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
162   GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
163   GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
164   GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
165   GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
166   GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
167   GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
168   GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
169   GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
170   GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
171   GNULIB_ACCEPT4=0;     AC_SUBST([GNULIB_ACCEPT4])
172   HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
173   HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
174                         AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
175   HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
176   HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])