forked from luck/tmp_suning_uos_patched
684f434cc0
In case the user specifies MAKEFLAGS as an environment variable,
or uses 'make -jN' explicitly, the options can conflict and result in:
BUILD: Doing 'make -j8' parallel build
make[1]: warning: -jN forced in submake: disabling jobserver mode.
GEN common-cmds.h
make[1]: *** write jobserver: Bad file descriptor. Stop.
Make sure we invoke the main makefile in a pristine state.
Users who want to do something non-standard can use the:
make -f Makefile.perf
method to invoke the makefile.
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-uen6hzTvkqqngqwjma9yoEgw@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
60 lines
1.2 KiB
Makefile
60 lines
1.2 KiB
Makefile
#
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# This is a simple wrapper Makefile that calls the main Makefile.perf
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# with a -j option to do parallel builds
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#
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# If you want to invoke the perf build in some non-standard way then
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# you can use the 'make -f Makefile.perf' method to invoke it.
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#
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#
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# Clear out the built-in rules GNU make defines by default (such as .o targets),
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# so that we pass through all targets to Makefile.perf:
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#
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.SUFFIXES:
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#
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# We don't want to pass along options like -j:
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#
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unexport MAKEFLAGS
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#
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# Do a parallel build with multiple jobs, based on the number of CPUs online
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# in this system: 'make -j8' on a 8-CPU system, etc.
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#
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# (To override it, run 'make JOBS=1' and similar.)
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#
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ifeq ($(JOBS),)
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JOBS := $(shell grep -c ^processor /proc/cpuinfo 2>/dev/null)
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ifeq ($(JOBS),)
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JOBS := 1
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endif
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endif
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define print_msg
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@printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'
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endef
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define make
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@$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(O) $@
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endef
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#
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# Needed if no target specified:
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#
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all:
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$(print_msg)
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$(make)
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#
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# The clean target is not really parallel, don't print the jobs info:
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#
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clean:
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$(make)
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#
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# All other targets get passed through:
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#
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%:
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$(print_msg)
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$(make)
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