# SPDX-License-Identifier: GPL-2.0-only

  include ../scripts/Makefile.include

  bindir ?= /usr/bin

  ifeq ($(srctree),)
  srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  srctree := $(patsubst %/,%,$(dir $(srctree)))
  endif
  
  # Do not use make's built-in rules
  # (this improves performance and avoids hard-to-debug behaviour);
  MAKEFLAGS += -r

  CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
  
  ALL_TARGETS := spidev_test spidev_fdx
  ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
  
  all: $(ALL_PROGRAMS)
  
  export srctree OUTPUT CC LD CFLAGS
  include $(srctree)/tools/build/Makefile.include

  #
  # We need the following to be outside of kernel tree
  #
  $(OUTPUT)include/linux/spi/spidev.h: ../../include/uapi/linux/spi/spidev.h
  	mkdir -p $(OUTPUT)include/linux/spi 2>&1 || true
  	ln -sf $(CURDIR)/../../include/uapi/linux/spi/spidev.h $@
  
  prepare: $(OUTPUT)include/linux/spi/spidev.h
  
  #
  # spidev_test
  #
  SPIDEV_TEST_IN := $(OUTPUT)spidev_test-in.o
  $(SPIDEV_TEST_IN): prepare FORCE
  	$(Q)$(MAKE) $(build)=spidev_test
  $(OUTPUT)spidev_test: $(SPIDEV_TEST_IN)
  	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
  
  #
  # spidev_fdx
  #
  SPIDEV_FDX_IN := $(OUTPUT)spidev_fdx-in.o
  $(SPIDEV_FDX_IN): prepare FORCE
  	$(Q)$(MAKE) $(build)=spidev_fdx
  $(OUTPUT)spidev_fdx: $(SPIDEV_FDX_IN)
  	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@

  
  clean:

  	rm -f $(ALL_PROGRAMS)

  	rm -rf $(OUTPUT)include/

  	find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete
  	find $(if $(OUTPUT),$(OUTPUT),.) -name '\.*.o.d' -delete
  	find $(if $(OUTPUT),$(OUTPUT),.) -name '\.*.o.cmd' -delete

  install: $(ALL_PROGRAMS)
  	install -d -m 755 $(DESTDIR)$(bindir);		\
  	for program in $(ALL_PROGRAMS); do		\
  		install $$program $(DESTDIR)$(bindir);	\
  	done

  FORCE:

  .PHONY: all install clean FORCE prepare