tools/gpio/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../scripts/Makefile.include
   3
   4 bindir ?= /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
  10 ifndef building_out_of_srctree
  11 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  12 srctree := $(patsubst %/,%,$(dir $(srctree)))
  13 endif
  14
  15 # Do not use make's built-in rules
  16 # (this improves performance and avoids hard-to-debug behaviour);
  17 MAKEFLAGS += -r
  18
  19 override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
  20
  21 ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon
  22 ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
  23
  24 all: $(ALL_PROGRAMS)
  25
  26 export srctree OUTPUT CC LD CFLAGS
  27 include $(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
  36 prepare: $(OUTPUT)include/linux/gpio.h
  37
  38 #
  39 # lsgpio
  40 #
  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 $@
  46
  47 #
  48 # gpio-hammer
  49 #
  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 $@
  55
  56 #
  57 # gpio-event-mon
  58 #
  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 $@
  64
  65 clean:
  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
  70 install: $(ALL_PROGRAMS)
  71         install -d -m 755 $(DESTDIR)$(bindir);          \
  72         for program in $(ALL_PROGRAMS); do              \
  73                 install $$program $(DESTDIR)$(bindir);  \
  74         done
  75
  76 FORCE:
  77
  78 .PHONY: all install clean FORCE prepare