# SPDX-License-Identifier: GPL-2.0

  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

  override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include

  ALL_TARGETS := iio_event_monitor lsiio iio_generic_buffer
  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/iio: ../../include/uapi/linux/iio
  	mkdir -p $(OUTPUT)include/linux/iio 2>&1 || true
  	ln -sf $(CURDIR)/../../include/uapi/linux/iio/events.h $@
  	ln -sf $(CURDIR)/../../include/uapi/linux/iio/types.h $@

  prepare: $(OUTPUT)include/linux/iio

  IIO_UTILS_IN := $(OUTPUT)iio_utils-in.o
  $(IIO_UTILS_IN): prepare FORCE
  	$(Q)$(MAKE) $(build)=iio_utils

  LSIIO_IN := $(OUTPUT)lsiio-in.o

  $(LSIIO_IN): prepare FORCE $(OUTPUT)iio_utils-in.o

  	$(Q)$(MAKE) $(build)=lsiio
  $(OUTPUT)lsiio: $(LSIIO_IN)
  	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@

  IIO_EVENT_MONITOR_IN := $(OUTPUT)iio_event_monitor-in.o

  $(IIO_EVENT_MONITOR_IN): prepare FORCE $(OUTPUT)iio_utils-in.o

  	$(Q)$(MAKE) $(build)=iio_event_monitor
  $(OUTPUT)iio_event_monitor: $(IIO_EVENT_MONITOR_IN)
  	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@

  IIO_GENERIC_BUFFER_IN := $(OUTPUT)iio_generic_buffer-in.o

  $(IIO_GENERIC_BUFFER_IN): prepare FORCE $(OUTPUT)iio_utils-in.o

  	$(Q)$(MAKE) $(build)=iio_generic_buffer
  $(OUTPUT)iio_generic_buffer: $(IIO_GENERIC_BUFFER_IN)
  	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@

  clean:

  	rm -f $(ALL_PROGRAMS)
  	rm -rf $(OUTPUT)include/linux/iio
  	find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -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