Option to exclude setjump/longjmp, setjmp.h

Using this option changes the control flow of Unity, but is useful on
constrained embedded systems. You can't fully simulate the power of
'longjmp' with just 'return', but Unity still works well, all tests pass.

src/unity_internals.h

@@ -11,7 +11,9 @@
 #include "unity_config.h"
 #endif
 
+#ifndef UNITY_EXCLUDE_SETJMP_H
 #include <setjmp.h>
+#endif
 
 #ifndef UNITY_EXCLUDE_MATH_H
 #include <math.h>
@@ -371,7 +373,9 @@ struct UNITY_STORAGE_T
     UNITY_COUNTER_TYPE TestIgnores;
     UNITY_COUNTER_TYPE CurrentTestFailed;
     UNITY_COUNTER_TYPE CurrentTestIgnored;
+#ifndef UNITY_EXCLUDE_SETJMP_H
     jmp_buf AbortFrame;
+#endif
 };
 
 extern struct UNITY_STORAGE_T Unity;
@@ -534,9 +538,13 @@ extern const char UnityStrErr64[];
  * Test Running Macros
  *-------------------------------------------------------*/
 
+#ifndef UNITY_EXCLUDE_SETJMP_H
 #define TEST_PROTECT() (setjmp(Unity.AbortFrame) == 0)
-
 #define TEST_ABORT() longjmp(Unity.AbortFrame, 1)
+#else
+#define TEST_PROTECT() 1
+#define TEST_ABORT() return
+#endif
 
 /* This tricky series of macros gives us an optional line argument to treat it as RUN_TEST(func, num=__LINE__) */
 #ifndef RUN_TEST

test/tests/testunity.c

@@ -99,7 +99,9 @@ void testUnitySizeInitializationReminder(void)
         UNITY_COUNTER_TYPE TestIgnores;
         UNITY_COUNTER_TYPE CurrentTestFailed;
         UNITY_COUNTER_TYPE CurrentTestIgnored;
+#ifndef UNITY_EXCLUDE_SETJMP_H
         jmp_buf AbortFrame;
+#endif
     } _Expected_Unity;
 #else
     struct {
@@ -113,7 +115,9 @@ void testUnitySizeInitializationReminder(void)
         UNITY_COUNTER_TYPE TestIgnores;
         UNITY_COUNTER_TYPE CurrentTestFailed;
         UNITY_COUNTER_TYPE CurrentTestIgnored;
+#ifndef UNITY_EXCLUDE_SETJMP_H
         jmp_buf AbortFrame;
+#endif
     } _Expected_Unity;
 #endif