This has been submitted as NTP community bug 3021
http://bugzilla.ntp.org/show_bug.cgi?id=3021
This patch may be removed when NTP is upgraded to a version that has bug
3021 fixed in it.

--- sntp/unity/unity_fixture.c
+++ sntp/unity/unity_fixture.c
@@ -16,7 +16,8 @@ UNITY_FIXTURE_T UnityFixture;
 int (*outputChar)(int) = putchar;
 
 int verbose = 0;
-
+#pragma weak setUp
+#pragma weak tearDown
 void setUp(void);
 void tearDown(void);
 void setUp(void)    { /*does nothing*/ }