inplace api and test, Makefile update

Makefile

@@ -2,7 +2,11 @@
 #CFLAGS       = -Wall -mmcu=atmega16 -Os -Wl,-Map,test.map
 #OBJCOPY      = avr-objcopy
 CC           = gcc
-CFLAGS       = -Wall -Os -Wl,-Map,test.map
+LD           = gcc
+CFLAGS       = -Wall -Os -c
+LDFLAGS      = -Wall -Os -Wl,-Map,test.map
+
+OBJCOPYFLAFS = -j .text -O ihex
 OBJCOPY      = objcopy
 
 # include path to AVR library
@@ -10,28 +14,27 @@ INCLUDE_PATH = /usr/lib/avr/include
 # splint static check
 SPLINT       = splint test.c aes.c -I$(INCLUDE_PATH) +charindex -unrecog
 
+default: test.elf
+
 .SILENT:
 .PHONY:  lint clean
 
+test.hex : test.elf
+	echo copy object-code to new image and format in hex
+	$(OBJCOPY) ${OBJCOPYFLAFS} $< $@
 
-rom.hex : test.out
-	# copy object-code to new image and format in hex
-	$(OBJCOPY) -j .text -O ihex test.out rom.hex
+test.o : test.c aes.h aes.o
+	echo [CC] $@
+	$(CC) $(CFLAGS) -o  $@ $<
 
-test.o : test.c
-	# compiling test.c
-	$(CC) $(CFLAGS) -c test.c -o test.o
+aes.o : aes.c aes.h
+	echo [CC] $@
+	$(CC) $(CFLAGS) -o $@ $<
 
-aes.o : aes.h aes.c
-	# compiling aes.c
-	$(CC) $(CFLAGS) -c aes.c -o aes.o
+test.elf : aes.o test.o
+	echo [LD] $@
+	$(LD) $(LDFLAGS) -o $@ $^
 
-test.out : aes.o test.o
-	# linking object code to binary
-	$(CC) $(CFLAGS) aes.o test.o -o test.out
-
-small: test.out
-	$(OBJCOPY) -j .text -O ihex test.out rom.hex
 
 clean:
 	rm -f *.OBJ *.LST *.o *.gch *.out *.hex *.map