original_kernel/tools/build/Makefile

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tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif
include $(srctree)/tools//scripts/Makefile.include
define allow-override
$(if $(or $(findstring environment,$(origin $(1))),\
$(findstring command line,$(origin $(1)))),,\
$(eval $(1) = $(2)))
endef
$(call allow-override,CC,$(CROSS_COMPILE)gcc)
$(call allow-override,LD,$(CROSS_COMPILE)ld)
HOSTCC ?= gcc
HOSTLD ?= ld
HOSTAR ?= ar
export HOSTCC HOSTLD HOSTAR
tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
ifeq ($(V),1)
Q =
else
Q = @
endif
export Q srctree CC LD
MAKEFLAGS := --no-print-directory
build := -f $(srctree)/tools/build/Makefile.build dir=. obj
all: $(OUTPUT)fixdep
tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
clean:
$(call QUIET_CLEAN, fixdep)
perf build: Add special fixdep cleaning rule Ingo reported following build failure: On Sat, Feb 11, 2017 at 12:12:34PM +0100, Ingo Molnar wrote: > > So I had this oldish 32-bit 15.10 Ubuntu installation around (fully updated), and > trying to build perf gave me: > > deimos:~/tip/tools/perf> make > BUILD: Doing 'make -j4' parallel build > make[3]: *** No rule to make target '/usr/include/x86_64-linux-gnu/sys/types.h', needed by 'fixdep.o'. Stop. > Makefile:42: recipe for target 'fixdep-in.o' failed > make[2]: *** [fixdep-in.o] Error 2 > /home/mingo/tip/tools/build/Makefile.include:4: recipe for target 'fixdep' failed > make[1]: *** [fixdep] Error 2 > Makefile:68: recipe for target 'all' failed > make: *** [all] Error 2 > > Now this got a bit better after I did a 'make mrproper' in the kernel tree: > > deimos:~/tip/tools/perf> make > BUILD: Doing 'make -j4' parallel build > HOSTCC fixdep.o > /home/mingo/tip/tools/build/fixdep: 1: /home/mingo/tip/tools/build/fixdep: Syntax error: "(" unexpected > /home/mingo/tip/tools/build/Makefile.build:101: recipe for target 'fixdep.o' failed > make[3]: *** [fixdep.o] Error 2 > Makefile:42: recipe for target 'fixdep-in.o' failed > make[2]: *** [fixdep-in.o] Error 2 > /home/mingo/tip/tools/build/Makefile.include:4: recipe for target 'fixdep' failed > make[1]: *** [fixdep] Error 2 > Makefile:68: recipe for target 'all' failed > make: *** [all] Error 2 > > After some digging it turns out that my 'fixdep' binary was 64-bit: > > deimos:~/tip/tools/perf> file /home/mingo/tip/tools/build/fixdep > /home/mingo/tip/tools/build/fixdep: ELF 64-bit LSB executable, x86-64, version 1 > (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux > 2.6.32, BuildID[sha1]=d527f736b57b5ba47210fbcb562a3b52867d21c1, not stripped > > But it did not get cleaned out by 'make clean'. > > Only after I did a 'make clean' in tools/ itself, did it get built properly. It shows we don't clean up properly the fixdep objects, so adding special rule for that. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reported-by: Ingo Molnar <mingo@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1487340058-10496-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-17 22:00:54 +08:00
$(Q)find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
$(Q)rm -f $(OUTPUT)fixdep
tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
$(OUTPUT)fixdep-in.o: FORCE
$(Q)$(MAKE) $(build)=fixdep
$(OUTPUT)fixdep: $(OUTPUT)fixdep-in.o
$(QUIET_LINK)$(HOSTCC) $(LDFLAGS) -o $@ $<
tools build: Add fixdep dependency helper For dependency tracking we currently use targets that fall out of the gcc -MD command. We store this info in the .cmd file and include as makefile during the build. This format put object as target and all the c and header files as dependencies, like: util/abspath.o: util/abspath.c /usr/include/stdc-predef.h util/cache.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ ... If any of those dependency header files (krava.h below) is removed the build fails on: make[1]: *** No rule to make target 'krava.h', needed by 'inc.o'. Stop. This patch adds fixdep helper, that is used by kbuild to alter the shape of the object dependencies like: source_util/abspath.o := util/abspath.c deps_util/abspath.o := \ /usr/include/stdc-predef.h \ util/cache.h \ ... util/abspath.o: $(deps_util/abspath.o) $(deps_util/abspath.o): With this format the header removal won't make the build fail, because it'll be picked up by the last empty target defined for each header. As previously mentioned the fixdep tool is taken from kbuild. It's not complete backport, only the part that alters the standard dependency info was taken, the part that adds the CONFIG_* dependency logic will be probably taken later on. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-23 18:33:58 +08:00
FORCE:
.PHONY: FORCE