moved native board drivers into separate directory

split up drivers to avoid building unnecessary files

native/Makefile

@@ -2,14 +2,16 @@ SRC = $(wildcard *.c)
 BINDIR = bin/
 OBJ = $(SRC:%.c=$(BINDIR)%.o)## defines
 DEP = $(SRC:%.c=$(BINDIR)%.d)
+export ARCH = native_base.a
 
 INCLUDES += -I$(RIOTBASE)/cpu/native/include/
 INCLUDES += -I$(RIOTBOARD)/native/include/
 
-all: $(BINDIR)native_base.a 
+all: $(BINDIR)$(ARCH)
+	$(MAKE) -C drivers
 
-$(BINDIR)native_base.a: $(OBJ)
-	$(AR) rcs $(BINDIR)native_base.a $(OBJ)
+$(BINDIR)$(ARCH): $(OBJ)
+	$(AR) rcs $(BINDIR)$(ARCH) $(OBJ)
 
 # pull in dependency info for *existing* .o files
 -include $(OBJ:.o=.d)
@@ -23,6 +25,7 @@ $(BINDIR)%.o: %.c
 
 # remove compilation products
 clean:
-	rm -f $(BINDIR)native_base.a $(OBJ) $(DEP)
+	${MAKE} -C drivers clean
+	rm -f $(BINDIR)$(ARCH) $(OBJ) $(DEP)
 	-rmdir -p $(BINDIR)
 

native/Makefile.include

@@ -5,7 +5,7 @@ export CPU = native
 export PREFIX = 
 #export CC = @$(PREFIX)gcc
 export AR = @$(PREFIX)ar
-export CFLAGS = -std=gnu99 -Wall -m32
+export CFLAGS += -std=gnu99 -Wall -m32
 export ASFLAGS =
 export AS = $(PREFIX)as
 export LINK = $(PREFIX)gcc
@@ -14,7 +14,7 @@ export OBJCOPY = $(PREFIX)objcopy
 FLASHER = lpc2k_pgm
 TERM = pyterm.py
 
-LINKFLAGS = -m32
+LINKFLAGS = -m32 -gc
 
 ifeq ($(strip $(PORT)),)
 	export PORT = /dev/ttyUSB0

native/drivers/Makefile

@@ -0,0 +1,30 @@
+SRC = $(wildcard *.c)
+BINDIR = $(RIOTBOARD)/$(BOARD)/bin/
+OBJ = $(BINDIR)native-led.o
+ifneq (,$(findstring ltc4150,$(USEMODULE)))
+	OBJ += $(BINDIR)native-ltc4150.o
+endif
+ifneq (,$(findstring uart0,$(USEMODULE)))
+	OBJ += $(BINDIR)native-uart0.o
+endif
+DEP = $(SRC:%.c=$(BINDIR)%.d)
+
+INCLUDES += -I$(RIOTBOARD)/native/include/
+
+$(BINDIR)native_drivers.a: $(OBJ)
+	@$(AR) rcs $(BINDIR)${ARCH} $(OBJ)
+
+# pull in dependency info for *existing* .o files
+-include $(OBJ:.o=.d)
+
+# compile and generate dependency info
+$(BINDIR)%.o: %.c
+	$(CC) $(CFLAGS) $(INCLUDES) $(BOARDINCLUDE) $(PROJECTINCLUDE) $(CPUINCLUDE) -c $*.c -o $(BINDIR)$*.o
+	@$(CC) $(CFLAGS) $(INCLUDES) $(BOARDINCLUDE) $(PROJECTINCLUDE) $(CPUINCLUDE) -MM $*.c > $(BINDIR)$*.d
+	@printf "$(BINDIR)" | cat - $(BINDIR)$*.d > /tmp/riot_out && mv /tmp/riot_out $(BINDIR)$*.d
+
+# remove compilation products
+
+clean:
+	rm -f $(OBJ) $(DEP)
+