# HG changeset patch
# User Simon Josefsson <simon@josefsson.org>
# Date 1128162478 0
# Node ID 81f384f9b845d89078c30619964dfd887a2bfdae
# Parent  5ba7d493bd0d167c404c1fa2199f0ccd45b7df9c
2005-10-01  Simon Josefsson  <jas@extundo.com>

	* getaddrinfo.m4: Use AC_GNU_SOURCE, GNU only declare getaddrinfo
	as an (POSIX) extension.  Check for sys/types.h, sys/socket.h, and
	netdb.h too, needed by getaddrinfo.h.  Check if getaddrinfo,
	freeaddrinfo and gai_strerror are declared by the POSIX headers.
	Check if struct addrinfo is declared.

diff --git a/m4/ChangeLog b/m4/ChangeLog
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,11 @@
+2005-10-01  Simon Josefsson  <jas@extundo.com>
+
+	* getaddrinfo.m4: Use AC_GNU_SOURCE, GNU only declare getaddrinfo
+	as an (POSIX) extension.  Check for sys/types.h, sys/socket.h, and
+	netdb.h too, needed by getaddrinfo.h.  Check if getaddrinfo,
+	freeaddrinfo and gai_strerror are declared by the POSIX headers.
+	Check if struct addrinfo is declared.
+
 2005-10-01  Jim Meyering  <jim@meyering.net>
 
 	Sync from coreutils.
diff --git a/m4/getaddrinfo.m4 b/m4/getaddrinfo.m4
--- a/m4/getaddrinfo.m4
+++ b/m4/getaddrinfo.m4
@@ -18,5 +18,22 @@
   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(sys/socket.h netdb.h sys/types.h netinet/in.h)
+  AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, gai_strerror],,,[
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_NETDB_H
+# include <netdb.h>
+#endif
 ])
+  AC_CHECK_TYPES([struct addrinfo],,,[
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_NETDB_H
+# include <netdb.h>
+#endif
+])
+])