-# sys_socket_h.m4 serial 13
+# sys_socket_h.m4 serial 14
dnl Copyright (C) 2005-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
gl_PREREQ_SYS_H_WINSOCK2
fi
AC_SUBST([SYS_SOCKET_H])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[
+/* Some systems require prerequisite headers. */
+#include <sys/types.h>
+#if !defined __GLIBC__ && HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/select.h>
+ ]], [socket connect accept bind getpeername getsockname getsockopt
+ listen recv send recvfrom sendto setsockopt shutdown accept4])
])
AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],