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https://github.com/torvalds/linux
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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>
92 lines
2.4 KiB
Makefile
92 lines
2.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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include ../scripts/Makefile.include
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bindir ?= /usr/bin
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# This will work when gpio is built in tools env. where srctree
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# isn't set and when invoked from selftests build, where srctree
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# is set to ".". building_out_of_srctree is undefined for in srctree
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# builds
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ifndef building_out_of_srctree
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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# Do not use make's built-in rules
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# (this improves performance and avoids hard-to-debug behaviour);
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MAKEFLAGS += -r
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override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
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ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon gpio-watch
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ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
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all: $(ALL_PROGRAMS)
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export srctree OUTPUT CC LD CFLAGS
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include $(srctree)/tools/build/Makefile.include
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#
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# We need the following to be outside of kernel tree
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#
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$(OUTPUT)include/linux/gpio.h: ../../include/uapi/linux/gpio.h
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mkdir -p $(OUTPUT)include/linux 2>&1 || true
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ln -sf $(CURDIR)/../../include/uapi/linux/gpio.h $@
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prepare: $(OUTPUT)include/linux/gpio.h
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GPIO_UTILS_IN := $(OUTPUT)gpio-utils-in.o
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$(GPIO_UTILS_IN): prepare FORCE
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$(Q)$(MAKE) $(build)=gpio-utils
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#
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# lsgpio
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#
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LSGPIO_IN := $(OUTPUT)lsgpio-in.o
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$(LSGPIO_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o
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$(Q)$(MAKE) $(build)=lsgpio
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$(OUTPUT)lsgpio: $(LSGPIO_IN)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
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#
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# gpio-hammer
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#
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GPIO_HAMMER_IN := $(OUTPUT)gpio-hammer-in.o
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$(GPIO_HAMMER_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o
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$(Q)$(MAKE) $(build)=gpio-hammer
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$(OUTPUT)gpio-hammer: $(GPIO_HAMMER_IN)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
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#
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# gpio-event-mon
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#
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GPIO_EVENT_MON_IN := $(OUTPUT)gpio-event-mon-in.o
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$(GPIO_EVENT_MON_IN): prepare FORCE $(OUTPUT)gpio-utils-in.o
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$(Q)$(MAKE) $(build)=gpio-event-mon
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$(OUTPUT)gpio-event-mon: $(GPIO_EVENT_MON_IN)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
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#
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# gpio-watch
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#
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GPIO_WATCH_IN := $(OUTPUT)gpio-watch-in.o
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$(GPIO_WATCH_IN): prepare FORCE
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$(Q)$(MAKE) $(build)=gpio-watch
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$(OUTPUT)gpio-watch: $(GPIO_WATCH_IN)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
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clean:
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rm -f $(ALL_PROGRAMS)
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rm -f $(OUTPUT)include/linux/gpio.h
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find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
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install: $(ALL_PROGRAMS)
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install -d -m 755 $(DESTDIR)$(bindir); \
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for program in $(ALL_PROGRAMS); do \
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install $$program $(DESTDIR)$(bindir); \
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done
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FORCE:
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.PHONY: all install clean FORCE prepare
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