VARIANT		?= versatileab
# Uses a binary GCC delivery from Linaro
# https://launchpad.net/linaro-toolchain-binaries/+download
#CROSS_COMPILE	?= arm-linux-gnueabihf-
#CROSS_COMPILE	?= arm-linux-gnueabi-
CROSS_COMPILE	?= armv4l-
# The old CodeSourcery binaries look like this
# CROSS_COMPILE	?= arm-none-eabi-
build_dir       := $(CURDIR)/build-versatile
output_dir	:= $(HOME)

.PHONY: have-crosscompiler
have-crosscompiler:
	@echo -n "Check that $(CROSS_COMPILE)gcc is available..."
	@which $(CROSS_COMPILE)gcc > /dev/null ; \
	if [ ! $$? -eq 0 ] ; then \
	   echo "ERROR: cross-compiler $(CROSS_COMPILE)gcc not in PATH=$$PATH!" ; \
	   echo "ABORTING." ; \
	   exit 1 ; \
	else \
	   echo "OK" ;\
	fi

build: have-crosscompiler FORCE
	rm -rf $(build_dir)
	@mkdir -p $(build_dir)
	$(MAKE) O=$(build_dir) CROSS_COMPILE=$(CROSS_COMPILE) distclean
	$(MAKE) O=$(build_dir) CROSS_COMPILE=$(CROSS_COMPILE) $(VARIANT)
	cp $(build_dir)/u-boot.bin $(output_dir)

clean:
	$(MAKE) O=$(build_dir) clean
	rm -rf $(build_dir)

# Rules without commands or prerequisites that do not match a file name
# are considered to always change when make runs. This means that any rule
# that depends on FORCE will always be remade also.
FORCE: