# set undefined variables
ifeq ($(strip $(RIOTCPU)),)
	export RIOTCPU =$(RIOTBASE)/cpu
endif
	
ifeq ($(strip $(RIOTBOARD)),)
	export RIOTBOARD =$(RIOTBASE)/boards
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')
CPUDEF = $(shell echo $(CPU)|tr 'a-z' 'A-Z')
CFLAGS += -DBOARD=$(BB) -DCPU_$(CPUDEF)
export CFLAGS

export BINDIR =$(CURDIR)/bin/

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

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

# 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: $(BINDIR)/$(PROJECT).a
	@echo "Building project $(PROJECT) for $(BOARD) w/ MCU $(MCU)."
	"$(MAKE)" -C $(RIOTBOARD)/$(BOARD)
	"$(MAKE)" -C $(RIOTBASE)
	@for i in $(EXTERNAL_MODULES) ; do "$(MAKE)" -C $$i ; done ;
ifeq ($(BUILDOSXNATIVE),1)	
	@$(LINK) $(UNDEF) -o $(BINDIR)/$(PROJECT).elf $(BASELIBS) $(LINKFLAGS) -Wl,-no_pie
else
	@$(LINK) $(UNDEF) -o $(BINDIR)/$(PROJECT).elf -Wl,--start-group $(BASELIBS) -lm -Wl,--end-group  -Wl,-Map=$(BINDIR)/$(PROJECT).map $(LINKFLAGS) 
	@$(SIZE) $(BINDIR)/$(PROJECT).elf
	@$(OBJCOPY) $(OFLAGS) $(BINDIR)/$(PROJECT).elf $(BINDIR)/$(PROJECT).hex
endif

## your make rules
## Only basic example - modify it for larger projects!!
#$(BINDIR)/$(PROJECT).a: $(BINDIR)/$(PROJECT).o
#	$(AR) -rc $(BINDIR)/project.a $(BINDIR)/$(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 = $(SRC:%.c=${BINDIR}/%.o)

$(BINDIR)/$(PROJECT).a:  $(OBJ)
	$(AR) -rc $(BINDIR)/$(PROJECT).a $(OBJ)

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

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

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

flash: all
	$(FLASHER) $(FFLAGS)

term:
	$(TERMPROG) $(PORT)

doc:
	make -BC $(RIOTBASE) doc

debug:
	$(DEBUGGER) $(DEBUGGER_FLAGS)

buildtest:
	@for BOARD in $$(find $(RIOTBOARD) -mindepth 1 -maxdepth 1 -type d \! -name \*-common -printf '%f\n' ); do \
		echo -n "Building for $${BOARD} .. "; \
		env -i HOME=$${HOME} PATH=$${PATH} BOARD=$${BOARD} RIOTBASE=$${RIOTBASE} RIOTBOARD=$${RIOTBOARD} RIOTCPU=$${RIOTCPU} $(MAKE) -B clean all >/dev/null 2>&1 && echo -e "\033[1;32msuccess\033[0m" || echo -e "\033[1;31mfailed\033[0m" ; \
	done