+ AC_CHECK_HEADERS_ONCE([netdb.h])
+ AC_CHECK_DECLS([inet_ntop],,,
+ [#include <arpa/inet.h>
+ #if HAVE_NETDB_H
+ # include <netdb.h>
+ #endif
+ ])
+ if test $ac_cv_have_decl_inet_ntop = no; then
+ HAVE_DECL_INET_NTOP=0
+ AC_REQUIRE([AC_C_RESTRICT])
+ fi