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WSL2-Linux-Kernel
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WSL2-Linux-Kernel
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tools
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build
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Build
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tools build: Make fixdep a hostprog It is used in the build process, so stop suppressing its build in tools cross builds. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/20160927141846.GA6589@krava [ Use HOSTCC on the $(OUTPUT)fixdep target, it was using the x-compiler to link fixdep-in.o, that was correctly built with HOSTCC and thus failing ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-27 17:18:46 +03:00
hostprogs := 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 13:33:58 +03:00
fixdep-y := fixdep.o