1 # SPDX-License-Identifier: GPL-2.0 2 include ../scripts/Makefile.include 3 4 bindir ?= /usr/bin 5 6 ifeq ($(srctree),) 7 srctree := $(patsubst %/,%,$(dir $(CURDIR))) 8 srctree := $(patsubst %/,%,$(dir $(srctree))) 9 endif 10 11 # Do not use make's built-in rules 12 # (this improves performance and avoids hard-to-debug behaviour); 13 MAKEFLAGS += -r 14 15 override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include 16 17 ALL_TARGETS := counter_example 18 ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS)) 19 20 all: $(ALL_PROGRAMS) 21 22 export srctree OUTPUT CC LD CFLAGS 23 include $(srctree)/tools/build/Makefile.include 24 25 # 26 # We need the following to be outside of kernel tree 27 # 28 $(OUTPUT)include/linux/counter.h: ../../include/uapi/linux/counter.h 29 mkdir -p $(OUTPUT)include/linux 2>&1 || true 30 ln -sf $(CURDIR)/../../include/uapi/linux/counter.h $@ 31 32 prepare: $(OUTPUT)include/linux/counter.h 33 34 COUNTER_EXAMPLE := $(OUTPUT)counter_example.o 35 $(COUNTER_EXAMPLE): prepare FORCE 36 $(Q)$(MAKE) $(build)=counter_example 37 $(OUTPUT)counter_example: $(COUNTER_EXAMPLE) 38 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ 39 40 clean: 41 rm -f $(ALL_PROGRAMS) 42 rm -rf $(OUTPUT)include/linux/counter.h 43 rm -df $(OUTPUT)include/linux 44 rm -df $(OUTPUT)include 45 find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete 46 47 install: $(ALL_PROGRAMS) 48 install -d -m 755 $(DESTDIR)$(bindir); \ 49 for program in $(ALL_PROGRAMS); do \ 50 install $$program $(DESTDIR)$(bindir); \ 51 done 52 53 FORCE: 54 55 .PHONY: all install clean FORCE prepare 56