improved Makefile and use debugging flags

src/Makefile

@@ -1,5 +1,5 @@
 CC = gcc
-CFLAGS = -Wall
+CFLAGS = -Wall -g -O0
 LDFLAGS = -luuid
 
 # List of all source files (assuming they're all in the same directory)
@@ -12,7 +12,7 @@ EXECUTABLE = "icscli"
 
 # linking
 $(EXECUTABLE): $(OBJ_FILES)
-	gcc -Wall $(OBJ_FILES) -o $(EXECUTABLE) $(LDFLAGS)
+	gcc $(CFLAGS) $(OBJ_FILES) -o $(EXECUTABLE) $(LDFLAGS)
 
 main.o: main.c
 	$(CC) $(CFLAGS) -c $<
@@ -27,7 +27,7 @@ install: $(EXECUTABLE)
 
 .PHONY:clean
 clean:
-	-rm $(EXECUTABLE) *.o
+	-rm -f $(EXECUTABLE) *.o
 
 .PHONY:uninstall
 uninstall: