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 38# 39# lsgpio 40# 41LSGPIO_IN := $(OUTPUT)lsgpio-in.o 42$(LSGPIO_IN): prepare FORCE 43 $(Q)$(MAKE) $(build)=lsgpio 44$(OUTPUT)lsgpio: $(LSGPIO_IN) 45 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 46 47# 48# gpio-hammer 49# 50GPIO_HAMMER_IN := $(OUTPUT)gpio-hammer-in.o 51$(GPIO_HAMMER_IN): prepare FORCE 52 $(Q)$(MAKE) $(build)=gpio-hammer 53$(OUTPUT)gpio-hammer: $(GPIO_HAMMER_IN) 54 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 55 56# 57# gpio-event-mon 58# 59GPIO_EVENT_MON_IN := $(OUTPUT)gpio-event-mon-in.o 60$(GPIO_EVENT_MON_IN): prepare FORCE 61 $(Q)$(MAKE) $(build)=gpio-event-mon 62$(OUTPUT)gpio-event-mon: $(GPIO_EVENT_MON_IN) 63 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 64 65clean: 66 rm -f $(ALL_PROGRAMS) 67 rm -f $(OUTPUT)include/linux/gpio.h 68 find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete 69 70install: $(ALL_PROGRAMS) 71 install -d -m 755 $(DESTDIR)$(bindir); \ 72 for program in $(ALL_PROGRAMS); do \ 73 install $$program $(DESTDIR)$(bindir); \ 74 done 75 76FORCE: 77 78.PHONY: all install clean FORCE prepare 79