# set undefined variables
ifeq ($(strip $(RIOTCPU)),)
	export RIOTCPU =$(RIOTBASE)/cpu
endif
	
ifeq ($(strip $(MCU)),)
	MCU = $(CPU)
endif

# if you want to publish the board into the sources as an uppercase #define
BB = $(shell echo $(BOARD)|tr 'a-z' 'A-Z')
CFLAGS += -DBOARD=$(BB)
export CFLAGS

# mandatory includes!
include $(RIOTBOARD)/$(BOARD)/Makefile.include
include $(RIOTCPU)/Makefile.include
include $(RIOTBASE)/Makefile.modules 

# your binaries to link
BASELIBS += $(RIOTBOARD)/$(BOARD)/bin/$(BOARD)_base.a
BASELIBS += $(PROJBINDIR)/${PROJECT}.a

PROJBINDIR =$(CURDIR)/bin

# clumsy way to enable building native on osx:
BUILDOSXNATIVE = 0
ifeq ($(CPU),native)
ifeq ($(shell uname -s),Darwin)
	BUILDOSXNATIVE = 1
endif
endif

# backward compatability with glibc <= 2.17 for native
ifeq ($(CPU),native)
ifeq ($(shell uname -s),Linux)
ifeq ($(shell ldd --version |  awk '/^ldd/{if ($$NF < 2.17) {print "yes"} else {print "no"} }'),yes)
	LINKFLAGS += -lrt
endif
endif
endif

.PHONY: all clean flash doc term

## make script for your project. Build RIOT-base here!
all: $(PROJBINDIR)/$(PROJECT).a
	@echo "Building project $(PROJECT) for $(BOARD) w/ MCU $(MCU)."
	$(MAKE) -C $(RIOTBOARD)
	$(MAKE) -C $(RIOTBASE)
	@for i in $(EXTERNAL_MODULES) ; do $(MAKE) -C $$i ; done ;
ifeq ($(BUILDOSXNATIVE),1)	
	@$(LINK) $(UNDEF) -o $(PROJBINDIR)/$(PROJECT).elf $(BASELIBS) $(LINKFLAGS) -Wl,-no_pie
else
	@$(LINK) $(UNDEF) -o $(PROJBINDIR)/$(PROJECT).elf -Wl,--start-group $(BASELIBS) -lm -Wl,--end-group  -Wl,-Map=$(PROJBINDIR)/$(PROJECT).map $(LINKFLAGS) 
	@$(SIZE) $(PROJBINDIR)/$(PROJECT).elf
	@$(OBJCOPY) -O ihex $(PROJBINDIR)/$(PROJECT).elf $(PROJBINDIR)/$(PROJECT).hex
endif

## your make rules
## Only basic example - modify it for larger projects!!
#$(PROJBINDIR)/$(PROJECT).a: $(PROJBINDIR)/$(PROJECT).o
#	$(AR) -rc $(PROJBINDIR)/project.a $(PROJBINDIR)/$(PROJECT).o 

# string array of all names of c files in dir
SRC = $(wildcard *.c)

# string array of all names replaced .c with .o 
OBJ = $(SRC:%.c=${PROJBINDIR}/%.o)

${PROJBINDIR}/$(PROJECT).a:  $(OBJ)
	$(AR) -rc bin/$(PROJECT).a $(OBJ)

# pull in dependency info for *existing* .o files
-include $(OBJ:.o=.d)

${PROJBINDIR}/%.o: %.c
	@echo; echo "Compiling.... $*.c"; echo
	@test -d $(PROJBINDIR) || mkdir -p $(PROJBINDIR)
	$(CC) $(CFLAGS) $(INCLUDES) -c $*.c -o bin/$*.o

clean:
	$(MAKE) -C $(RIOTBOARD) clean
	$(MAKE) -C $(RIOTBASE) clean
	@for i in $(EXTERNAL_MODULES) ; do $(MAKE) -C $$i clean ; done ;
	rm -rf $(PROJBINDIR)

flash: all
	$(FLASHER) $(FFLAGS)

term:
	$(TERM) $(PORT)

doc:
	make -BC $(RIOTBASE) doc