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-rw-r--r--m4/sockpfaf.m484
1 files changed, 84 insertions, 0 deletions
diff --git a/m4/sockpfaf.m4 b/m4/sockpfaf.m4
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+++ b/m4/sockpfaf.m4
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+# sockpfaf.m4 serial 10
+dnl Copyright (C) 2004, 2006, 2009-2022 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Test for some common socket protocol families (PF_INET, PF_INET6, ...)
+dnl and some common address families (AF_INET, AF_INET6, ...).
+dnl This test assumes that a system supports an address family if and only if
+dnl it supports the corresponding protocol family.
+
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_SOCKET_FAMILIES],
+[
+ AC_REQUIRE([gl_SYS_SOCKET_H])
+ AC_CHECK_HEADERS_ONCE([netinet/in.h])
+
+ AC_CACHE_CHECK([for IPv4 sockets],
+ [gl_cv_socket_ipv4],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif]],
+[[int x = AF_INET; struct in_addr y; struct sockaddr_in z;
+ if (&x && &y && &z) return 0;]])],
+ gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
+ if test $gl_cv_socket_ipv4 = yes; then
+ AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
+ fi
+
+ AC_CACHE_CHECK([for IPv6 sockets],
+ [gl_cv_socket_ipv6],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif]],
+[[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
+ if (&x && &y && &z) return 0;]])],
+ gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
+ if test $gl_cv_socket_ipv6 = yes; then
+ AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
+ fi
+])
+
+AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
+[
+ AC_REQUIRE([gl_SYS_SOCKET_H])
+ AC_CHECK_HEADERS_ONCE([sys/un.h])
+
+ AC_CACHE_CHECK([for UNIX domain sockets],
+ [gl_cv_socket_unix],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif]],
+[[int x = AF_UNIX; struct sockaddr_un y;
+ if (&x && &y) return 0;]])],
+ gl_cv_socket_unix=yes, gl_cv_socket_unix=no)])
+ if test $gl_cv_socket_unix = yes; then
+ AC_DEFINE([HAVE_UNIXSOCKET], [1], [Define to 1 if <sys/socket.h> defines AF_UNIX.])
+ fi
+])