1# SPDX-License-Identifier: GPL-2.0 2include ../scripts/Makefile.include 3 4bindir ?= /usr/bin 5 6# This will work when gpio is built in tools env. where srctree 7# isn't set and when invoked from selftests build, where srctree 8# is set to ".". building_out_of_srctree is undefined for in srctree 9# builds 10ifndef building_out_of_srctree 11srctree := $(patsubst %/,%,$(dir $(CURDIR))) 12srctree := $(patsubst %/,%,$(dir $(srctree))) 13endif 14 15# Do not use make's built-in rules 16# (this improves performance and avoids hard-to-debug behaviour); 17MAKEFLAGS += -r 18 19override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include 20 21ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon 22ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS)) 23 24all: $(ALL_PROGRAMS) 25 26export srctree OUTPUT CC LD CFLAGS 27include $(srctree)/tools/build/Makefile.include 28 29# 30# We need the following to be outside of kernel tree 31# 32$(OUTPUT)include/linux/gpio.h: ../../include/uapi/linux/gpio.h 33 mkdir -p $(OUTPUT)include/linux 2>&1 || true 34 ln -sf $(CURDIR)/../../include/uapi/linux/gpio.h $@ 35 36prepare: $(OUTPUT)include/linux/gpio.h 37 38GPIO_UTILS_IN := $(output)gpio-utils-in.o 39$(GPIO_UTILS_IN): prepare FORCE 40 $(Q)$(MAKE) $(build)=gpio-utils 41 42# 43# lsgpio 44# 45LSGPIO_IN := $(OUTPUT)lsgpio-in.o 46$(LSGPIO_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 47 $(Q)$(MAKE) $(build)=lsgpio 48$(OUTPUT)lsgpio: $(LSGPIO_IN) 49 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 50 51# 52# gpio-hammer 53# 54GPIO_HAMMER_IN := $(OUTPUT)gpio-hammer-in.o 55$(GPIO_HAMMER_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 56 $(Q)$(MAKE) $(build)=gpio-hammer 57$(OUTPUT)gpio-hammer: $(GPIO_HAMMER_IN) 58 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 59 60# 61# gpio-event-mon 62# 63GPIO_EVENT_MON_IN := $(OUTPUT)gpio-event-mon-in.o 64$(GPIO_EVENT_MON_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 65 $(Q)$(MAKE) $(build)=gpio-event-mon 66$(OUTPUT)gpio-event-mon: $(GPIO_EVENT_MON_IN) 67 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 68 69clean: 70 rm -f $(ALL_PROGRAMS) 71 rm -f $(OUTPUT)include/linux/gpio.h 72 find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete 73 74install: $(ALL_PROGRAMS) 75 install -d -m 755 $(DESTDIR)$(bindir); \ 76 for program in $(ALL_PROGRAMS); do \ 77 install $$program $(DESTDIR)$(bindir); \ 78 done 79 80FORCE: 81 82.PHONY: all install clean FORCE prepare 83