Tweaked the debug building and printing a little - I hope this works OK for everyone. Let me know if not.

Tamped down a few warnings.
For the demo/server Makefile, made an either/or choice between executable size optimization (normal) or gdb debug info and no optimization.

bacnet-stack/demo/epics/Makefile

@@ -41,7 +41,7 @@ DEBUGGING =
 OPTIMIZATION = -Os
 ifeq (${BUILD},debug)
 OPTIMIZATION = -O0
-DEBUGGING = -g
+DEBUGGING = -g -DDEBUG_ENABLED=1
 endif
 # put all the flags together
 CFLAGS = -Wall $(DEBUGGING) $(OPTIMIZATION) $(INCLUDES) $(DEFINES)

bacnet-stack/demo/epics/main.c

@@ -903,7 +903,7 @@ int main(
     bool found = false;
     BACNET_OBJECT_ID myObject;
     uint8_t buffer[MAX_PDU] = { 0 };
-    BACNET_READ_ACCESS_DATA *rpm_object;
+    BACNET_READ_ACCESS_DATA *rpm_object = NULL;
     KEY nextKey;
 
     CheckCommandLineArgs(argc, argv);   /* Won't return if there is an issue. */