# Structure of build system modelled on the GNU/Linux kernel build system

obj-y :=

srctree		:= $(CURDIR)
objtree		:= $(CURDIR)
src		:= $(srctree)
obj		:= $(objtree)

export srctree objtree

# Compiler, Preprocessor, Assembler, Linker, etc. options

CROSS_COMPILE = arm-none-linux-gnueabi-
INCLUDE_DIRS += -I$(CURDIR)/include

# Make variables (CC, etc...)

export AS		= $(CROSS_COMPILE)as
export LD		= $(CROSS_COMPILE)ld
export CC		= $(CROSS_COMPILE)gcc
export CPP		= $(CROSS_COMPILE)$(CC) -E
export AR		= $(CROSS_COMPILE)ar
export NM		= $(CROSS_COMPILE)nm
export STRIP	= $(CROSS_COMPILE)strip
export OBJCOPY	= $(CROSS_COMPILE)objcopy
export OBJDUMP	= $(CROSS_COMPILE)objdump

export CFLAGS += -nodefaultlibs  -nostdlib
export CPPFLAGS	+=$(INCLUDE_DIRS)
export AFLAGS=-mpfu=neon

# include the config in all sub-makes
MAKEFILES := $(CURDIR)/.config

include $(MAKEFILES)

SUBDIRS = arch libc

all: bootloader-ap

bootloader-ap: bootloader-ap.o
	$(OBJCOPY) -S -O binary bootloader-ap.o $@
	@echo "ROM Image is " $@

bootloader-ap.o: subdirs
	$(LD) -N -o bootloader-ap.o arch/arch.o libc/libc.o

subdirs: $(SUBDIRS)

$(SUBDIRS):
	$(MAKE) -C $@

clean:
	$(foreach d, $(SUBDIRS), $(MAKE) -C $d $@;)

	-rm -f *.o bootloader-ap

.PHONY: subdirs $(SUBDIRS) all clean