Build fix for sunfire100b. This can go when BUG#14420 is fixed.

dbug/dbug.c:
  Build fix for sunfire100b. The ld does not want to link with an empty library, so we put something in it.
dbug/factorial.c:
  Build fix for sunfire100b. When DBUG_OFF is defined, dbug is not there, and we can't use it even if we try, period.

dbug/dbug.c

@@ -2375,4 +2375,18 @@ va_list ap;
 
 #endif  /* NO_VARARGS */
 
+#else
+
+/*
+ * Dummy function, workaround for MySQL bug#14420 related
+ * build failure on a platform where linking with an empty
+ * archive fails.
+ *
+ * This block can be removed as soon as a fix for bug#14420
+ * is implemented.
+ */
+int i_am_a_dummy_function() {
+       return 0;
+}
+
 #endif

dbug/factorial.c

 #ifdef DBUG_OFF				/* We are testing dbug */
-#undef DBUG_OFF
-#endif
+
+int factorial(register int value) {
+	if(value > 1) {
+		value *= factorial(value-1);
+	}
+	return value;
+}
+
+#else
 
 #include <my_global.h>
 
@@ -15,3 +22,6 @@ register int value)
     DBUG_PRINT ("result", ("result is %d", value));
     DBUG_RETURN (value);
 }
+
+#endif
+