More prep for poll(2) support.

include/ac/fdset.h

@@ -14,6 +14,11 @@
  * <http://www.OpenLDAP.org/license.html>.
  */
 
+/*
+ * This header is to be included by portable.h to ensure
+ * tweaking of FD_SETSIZE is done early enough to be effective.
+ */
+
 #ifndef _AC_FDSET_H
 #define _AC_FDSET_H
 

include/ac/socket.h

@@ -21,6 +21,10 @@
 #include <sys/types.h>
 #endif
 
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#endif
+
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>