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 10ifeq ($(srctree),) 11update_srctree := 1 12endif 13ifndef building_out_of_srctree 14update_srctree := 1 15endif 16ifeq ($(update_srctree),1) 17srctree := $(patsubst %/,%,$(dir $(CURDIR))) 18srctree := $(patsubst %/,%,$(dir $(srctree))) 19endif 20 21# Do not use make's built-in rules 22# (this improves performance and avoids hard-to-debug behaviour); 23MAKEFLAGS += -r 24 25override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include 26 27ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon gpio-watch 28ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS)) 29 30all: $(ALL_PROGRAMS) 31 32export srctree OUTPUT CC LD CFLAGS 33include $(srctree)/tools/build/Makefile.include 34 35# 36# We need the following to be outside of kernel tree 37# 38$(OUTPUT)include/linux/gpio.h: ../../include/uapi/linux/gpio.h 39 mkdir -p $(OUTPUT)include/linux 2>&1 || true 40 ln -sf $(CURDIR)/../../include/uapi/linux/gpio.h $@ 41 42prepare: $(OUTPUT)include/linux/gpio.h 43 44GPIO_UTILS_IN := $(OUTPUT)gpio-utils-in.o 45$(GPIO_UTILS_IN): prepare FORCE 46 $(Q)$(MAKE) $(build)=gpio-utils 47 48# 49# lsgpio 50# 51LSGPIO_IN := $(OUTPUT)lsgpio-in.o 52$(LSGPIO_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 53 $(Q)$(MAKE) $(build)=lsgpio 54$(OUTPUT)lsgpio: $(LSGPIO_IN) 55 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 56 57# 58# gpio-hammer 59# 60GPIO_HAMMER_IN := $(OUTPUT)gpio-hammer-in.o 61$(GPIO_HAMMER_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 62 $(Q)$(MAKE) $(build)=gpio-hammer 63$(OUTPUT)gpio-hammer: $(GPIO_HAMMER_IN) 64 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 65 66# 67# gpio-event-mon 68# 69GPIO_EVENT_MON_IN := $(OUTPUT)gpio-event-mon-in.o 70$(GPIO_EVENT_MON_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o 71 $(Q)$(MAKE) $(build)=gpio-event-mon 72$(OUTPUT)gpio-event-mon: $(GPIO_EVENT_MON_IN) 73 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 74 75# 76# gpio-watch 77# 78GPIO_WATCH_IN := $(OUTPUT)gpio-watch-in.o 79$(GPIO_WATCH_IN): prepare FORCE 80 $(Q)$(MAKE) $(build)=gpio-watch 81$(OUTPUT)gpio-watch: $(GPIO_WATCH_IN) 82 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 83 84clean: 85 rm -f $(ALL_PROGRAMS) 86 rm -rf $(OUTPUT)include 87 find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete -o -name '\.*.cmd' -delete 88 89install: $(ALL_PROGRAMS) 90 install -d -m 755 $(DESTDIR)$(bindir); \ 91 for program in $(ALL_PROGRAMS); do \ 92 install $$program $(DESTDIR)$(bindir); \ 93 done 94 95FORCE: 96 97.PHONY: all install clean FORCE prepare 98