# set undefined variables
RIOTBASE ?= $(shell dirname "$(lastword $(MAKEFILE_LIST))")
export RIOTBASE := $(abspath $(RIOTBASE))

RIOTCPU ?= $(RIOTBASE)/cpu
export RIOTCPU := $(abspath $(RIOTCPU))

RIOTBOARD ?= $(RIOTBASE)/boards
export RIOTBOARD := $(abspath $(RIOTBOARD))

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)

# Add `-fno-delete-null-pointer-checks` flag iff the compiler supports it.
# GCC removes moves tests whether `x == NULL`, if previously `x` or even `x->y` was accessed.
# 0x0 might be a sane memory location for embedded systems, so the test must not be removed.
# Right now clang does not use the *delete-null-pointer* optimization, and does not understand the parameter.
# Related issues: #628, #664.
ifeq ($(shell $(CC) -fno-delete-null-pointer-checks -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
ifeq ($(shell LANG=C $(CC) -fno-delete-null-pointer-checks -E - 2>&1 1>/dev/null </dev/null | grep warning: | grep -- -fno-delete-null-pointer-checks),)
CFLAGS += -fno-delete-null-pointer-checks
endif
endif

export CFLAGS

export BINDIR =$(CURDIR)/bin/$(BOARD)/

ifeq ($(QUIET),1)
	AD=@
else
	AD=
endif
export AD

BOARD := $(strip $(BOARD))

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

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

.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)
	$(AD)$(LINK) $(UNDEF) -o $(BINDIR)$(PROJECT).elf $(BASELIBS) $(LINKFLAGS) -Wl,-no_pie
else
	$(AD)$(LINK) $(UNDEF) -o $(BINDIR)$(PROJECT).elf -Wl,--start-group $(BASELIBS) -lm -Wl,--end-group  -Wl,-Map=$(BINDIR)$(PROJECT).map $(LINKFLAGS)
endif
	$(AD)$(SIZE) $(BINDIR)$(PROJECT).elf
	$(AD)$(OBJCOPY) $(OFLAGS) $(BINDIR)$(PROJECT).elf $(BINDIR)$(PROJECT).hex

## 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}${PROJECT}/%.o)

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

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

$(BINDIR)$(PROJECT)/%.o: %.c $(PROJDEPS)
	@echo; echo "Compiling.... $*.c"; echo
	@test -d $(BINDIR)$(PROJECT) || mkdir -p $(BINDIR)$(PROJECT)
	$(AD)$(CC) $(CFLAGS) $(INCLUDES) -c $*.c -o $(BINDIR)$(PROJECT)/$*.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:
	@if [ -z "$${JENKINS_URL}" ] && tput colors 2>&1 > /dev/null; then \
		GREEN='\033[1;32m'; RED='\033[1;31m'; RESET='\033[0m'; \
		ECHO='echo -e'; \
	else \
		GREEN=''; RED=''; RESET=''; \
		ECHO='echo'; \
	fi; \
	\
	for BOARD in $$(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 ; \
		if [ "$${?}" = "0" ]; then \
			$${ECHO} "$${GREEN}success$${RESET}"; \
		else \
			$${ECHO} "$${RED}failed$${RESET}"; \
			BUILDTESTFAILED=1; \
		fi; \
	done; \
	if [ "$${BUILDTESTFAILED}" = "1" ]; then \
		exit 1; \
	fi