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| author |   Ingo Molnar <mingo@kernel.org> | 2013-10-04 11:11:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 08:49:01 +0200 |
| commit | 684f434cc05a122938b75e055d7d799f1dd58d55 (patch) | |
| tree | 62926486c6a31cd4a5aa761ae9b7ee002871e4ed /tools/perf/Makefile | |
| parent | tools/perf/build: Make sure autodep feature binaries honor the O= setting (diff) | |
| download | wireguard-linux-684f434cc05a122938b75e055d7d799f1dd58d55.tar.xz wireguard-linux-684f434cc05a122938b75e055d7d799f1dd58d55.zip | |
tools/perf/build: Exclude MAKEFLAGS from nested invocation
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>
Diffstat (limited to 'tools/perf/Makefile')
| -rw-r--r-- | tools/perf/Makefile | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 6f6f13a13bb6..74f52d8f9631 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -1,3 +1,10 @@ +# +# This is a simple wrapper Makefile that calls the main Makefile.perf +# with a -j option to do parallel builds +# +# If you want to invoke the perf build in some non-standard way then +# you can use the 'make -f Makefile.perf' method to invoke it. +# # # Clear out the built-in rules GNU make defines by default (such as .o targets), @@ -6,6 +13,11 @@ .SUFFIXES: # +# We don't want to pass along options like -j: +# +unexport MAKEFLAGS + +# # Do a parallel build with multiple jobs, based on the number of CPUs online # in this system: 'make -j8' on a 8-CPU system, etc. # @@ -18,14 +30,12 @@ ifeq ($(JOBS),) endif endif -export JOBS - define print_msg @printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n' endef define make - @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) $@ + @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(O) $@ endef # |