1 # SPDX-License-Identifier: GPL-2.0
2 include ../scripts/Makefile.include
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
10 ifndef building_out_of_srctree
11 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
12 srctree := $(patsubst %/,%,$(dir $(srctree)))
15 # Do not use make's built-in rules
16 # (this improves performance and avoids hard-to-debug behaviour);
19 override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
21 ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon
22 ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
26 export srctree OUTPUT CC LD CFLAGS
27 include $(srctree)/tools/build/Makefile.include
30 # We need the following to be outside of kernel tree
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 $@
36 prepare: $(OUTPUT)include/linux/gpio.h
41 LSGPIO_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 $@
50 GPIO_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 $@
59 GPIO_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 $@
67 rm -f $(OUTPUT)include/linux/gpio.h
68 find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
70 install: $(ALL_PROGRAMS)
71 install -d -m 755 $(DESTDIR)$(bindir); \
72 for program in $(ALL_PROGRAMS); do \
73 install $$program $(DESTDIR)$(bindir); \
78 .PHONY: all install clean FORCE prepare