wrong parameter to get opt, ws cleanup, and -O2

Makefile

@@ -1,13 +1,13 @@
 CXX=g++
 CC=gcc
-CFLAGS=-g -c
+CFLAGS=-g -c -O2
 LDFLAGS=
 AR=ar
 
 all: icsscand
 
 icsscand: icsscand.o
-	$(CC) $(LDFLAGS) icsscand.o -o icsscand -lpthread -lftdi -licsneoapi
+	$(CC) $(LDFLAGS) icsscand.o -o icsscand -lpthread -licsneoapi
 
 icsscand.o: icsscand.c
 	$(CC) $(CFLAGS) icsscand.c

icsscand.c

@@ -563,7 +563,7 @@ int main(int argc, char **argv)
         pthread_t probe_thread;
 
         /* process command line switches */
-        while ((opt = getopt(argc, argv, "hF")) != -1) 
+        while ((opt = getopt(argc, argv, "hD")) != -1)
         {
                 switch(opt)
                 {