Index: configure.in
--- configure.in.orig
+++ configure.in
@@ -136,16 +136,16 @@ AC_MSG_RESULT($enableval);
 
 dnl Checks predeclared identifers of function names
 AC_MSG_CHECKING(ANSI predeclared __func__)
-AC_TRY_COMPILE([],
-[void func(void) {printf("%s\n", __func__);}],
+AC_TRY_COMPILE([#include <stdio.h>],
+[printf("%s\n", __func__);],
 	[AC_MSG_RESULT(yes)
 	 pred_func_id=ansi],
 	[AC_MSG_RESULT(no)
 	 pred_func_id=no])
 if test $pred_func_id = no; then
 AC_MSG_CHECKING(gcc predelcared __FUNCTION__)
-	AC_TRY_COMPILE([],
-	[void func(void) {printf("%s\n", __FUNCTION__);}],
+	AC_TRY_COMPILE([#include <stdio.h>],
+	[printf("%s\n", __FUNCTION__);],
 		[AC_MSG_RESULT(yes)
 		 pred_func_id=gcc],
 		[AC_MSG_RESULT(no)
@@ -181,11 +181,11 @@ esac
 dnl Checks the argument order of TAILQ_FOREACH_REVERSE if it exists
 if test $tailq_foreach = yes ; then
 	AC_MSG_CHECKING(argument order of TAILQ_FOREACH_REVERSE)
-	AC_TRY_COMPILE([],
-	[
+	AC_TRY_COMPILE([
 	#include <stdio.h>
 	#include <sys/queue.h>
-
+	],
+	[
 	TAILQ_HEAD(tailhead, entry) head = TAILQ_HEAD_INITIALIZER(head);
 	struct entry {
 		TAILQ_ENTRY(entry) entries;