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| author | Ingo Molnar | 2013-09-30 13:51:28 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2013-10-09 08:48:29 +0200 |
| commit | 8b6eb56a9570001634df1d2c7f38e7179a357362 (patch) | |
| tree | 7bfbb9255f80cd8acd2f94d90454c1e9a04e15e2 /tools/perf/config/feature-checks/Makefile | |
| parent | tools/perf/build: Add feature check core code (diff) | |
| download | kernel-qcow2-linux-8b6eb56a9570001634df1d2c7f38e7179a357362.tar.gz kernel-qcow2-linux-8b6eb56a9570001634df1d2c7f38e7179a357362.tar.xz kernel-qcow2-linux-8b6eb56a9570001634df1d2c7f38e7179a357362.zip | |
tools/perf/build: Add 'autodep' functionality, generate feature test dependencies automatically
Use GCC's -MD feature to generate a dependency file for each feature test .c file,
and include that .d file in the config/feature-checks/Makefile.
This allows us to do two things:
- speed up feature tests
- detect removal or changes in build dependencies - including system libraries/headers
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-Jfma8pmPnnqzpxjbs3hpgmsj@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/config/feature-checks/Makefile')
| -rw-r--r-- | tools/perf/config/feature-checks/Makefile | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index b3f6372ad8b0..4708ccadfc54 100644 --- a/tools/perf/config/feature-checks/Makefile +++ b/tools/perf/config/feature-checks/Makefile @@ -1,16 +1,20 @@ FILES=test-hello +CC := $(CC) -MD + all: $(FILES) BUILD = $(CC) -o $(OUTPUT)$@ $@.c ############################### -test-hello: test-hello.c +test-hello: $(BUILD) +-include *.d */*.d + ############################### clean: - rm -f $(FILES) + rm -f $(FILES) *.d |