-# getaddrinfo.m4 serial 6
+# getaddrinfo.m4 serial 7
dnl Copyright (C) 2004, 2005 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_REQUIRE([gl_C_RESTRICT])
AC_REQUIRE([gl_SOCKET_FAMILIES])
AC_REQUIRE([AC_C_INLINE])
- AC_CHECK_HEADERS_ONCE([netinet/in.h])
+ AC_REQUIRE([AC_GNU_SOURCE])
+ AC_CHECK_HEADERS_ONCE(netinet/in.h)
+ AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, gai_strerror],,,[
+ /* sys/types.h is not needed according to POSIX, but the
+ sys/socket.h in i386-unknown-freebsd4.10 and
+ powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+])
+ AC_CHECK_TYPES([struct addrinfo],,,[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+])
])