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 gpio-watch
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
38 GPIO_UTILS_IN := $(OUTPUT)gpio-utils-in.o
39 $(GPIO_UTILS_IN): prepare FORCE
40 $(Q)$(MAKE) $(build)=gpio-utils
45 LSGPIO_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 $@
54 GPIO_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 $@
63 GPIO_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 $@
72 GPIO_WATCH_IN := $(OUTPUT)gpio-watch-in.o
73 $(GPIO_WATCH_IN): prepare FORCE
74 $(Q)$(MAKE) $(build)=gpio-watch
75 $(OUTPUT)gpio-watch: $(GPIO_WATCH_IN)
76 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
80 rm -f $(OUTPUT)include/linux/gpio.h
81 find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
83 install: $(ALL_PROGRAMS)
84 install -d -m 755 $(DESTDIR)$(bindir); \
85 for program in $(ALL_PROGRAMS); do \
86 install $$program $(DESTDIR)$(bindir); \
91 .PHONY: all install clean FORCE prepare