5c8166419a
$(or ...) is available since GNU Make 3.81, and useful to shorten the code in some places. Covert as follows: $(if A,A,B) --> $(or A,B) This patch also converts: $(if A, A, B) --> $(or A, B) Strictly speaking, the latter is not an equivalent conversion because GNU Make keeps spaces after commas; if A is not empty, $(if A, A, B) expands to " A", while $(or A, B) expands to "A". Anyway, preceding spaces are not significant in the code hunks I touched. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
1.4 KiB
SPDX-License-Identifier: GPL-2.0
include ../scripts/Makefile.include
bindir ?= /usr/bin
ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) endif
Do not use make's built-in rules
(this improves performance and avoids hard-to-debug behaviour);
MAKEFLAGS += -r
override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
ALL_TARGETS := counter_example ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
all: $(ALL_PROGRAMS)
export srctree OUTPUT CC LD CFLAGS include $(srctree)/tools/build/Makefile.include
We need the following to be outside of kernel tree
$(OUTPUT)include/linux/counter.h: ../../include/uapi/linux/counter.h mkdir -p $(OUTPUT)include/linux 2>&1 || true ln -sf $(CURDIR)/../../include/uapi/linux/counter.h $@
prepare: $(OUTPUT)include/linux/counter.h
COUNTER_EXAMPLE := $(OUTPUT)counter_example.o $(COUNTER_EXAMPLE): prepare FORCE $(Q)$(MAKE) $(build)=counter_example $(OUTPUT)counter_example: $(COUNTER_EXAMPLE) $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
clean: rm -f $(ALL_PROGRAMS) rm -rf $(OUTPUT)include/linux/counter.h find $(or $(OUTPUT),.) -name '.o' -delete -o -name '..d' -delete
install: $(ALL_PROGRAMS)
install -d -m 755 $(DESTDIR)$(bindir);
for program in $(ALL_PROGRAMS); do
install $$program $(DESTDIR)$(bindir);
done
FORCE:
.PHONY: all install clean FORCE prepare