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 <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- tools/perf/config/feature-checks/Makefile | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index b3f6372..4708cca 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 $(OUTPUT)$@ [email protected] ############################### -test-hello: test-hello.c +test-hello: $(BUILD) +-include *.d */*.d + ############################### clean: - rm -f $(FILES) + rm -f $(FILES) *.d -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
