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Commit b6aa9979 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

tools/perf/build: Add feature check core code 

Start the split-out of the feature check code by adding a list of features to be
tested, and rules to process that list by building its matching feature-check
file in config/feature-checks/test-<feature>.c.

Add 'hello' as the initial feature.

This structure will allow us to build split-out feature checks in parallel and
thus speed up feature detection dramatically.

No change in functionality: no feature check is used by the build rules yet.

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-pixkihgscFaohfFigq5yt9gs@git.kernel.org


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 89fe808a

tools/perf/config/Makefile

+16 −0
Original line number Diff line number Diff line
@@ -89,6 +89,22 @@ CFLAGS += -std=gnu99 


EXTLIBS = -lelf -lpthread -lrt -lm -ldl



feature_check = $(eval $(feature_check_code)); $(info CHK: config/feature-checks/test-$(1))

define feature_check_code

  feature-$(2) := $(shell make -C config/feature-checks test-$1 >/dev/null 2>/dev/null && echo 1 || echo 0)

endef



#

# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:

#

$(info Testing features:)

$(shell make -i -j -C config/feature-checks >/dev/null 2>&1)

$(info done)



FEATURE_TESTS = hello



$(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))



ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -fstack-protector-all,-fstack-protector-all),y)

  CFLAGS += -fstack-protector-all

endif

tools/perf/config/feature-checks/Makefile

0 → 100644
+16 −0
Original line number Diff line number Diff line 


FILES=test-hello



all: $(FILES)



BUILD = $(CC) -o $(OUTPUT)$@ $@.c



###############################



test-hello: test-hello.c

	$(BUILD)



###############################



clean:

	rm -f $(FILES)

tools/perf/config/feature-checks/test-hello.c

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#include <stdio.h>



int main(void)

{

	return puts("hi");

}