This is somewhat cargo-culted from the libbpf build. It will be used in a subsequent patch to query for Clang BPF atomics support. Change-Id: I9318a1702170eb752acced35acbb33f45126c44c Signed-off-by: Brendan Jackman <jackmanb@xxxxxxxxxx> --- tools/testing/selftests/bpf/.gitignore | 1 + tools/testing/selftests/bpf/Makefile | 38 ++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index 395ae040ce1f..3c604dff1e20 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -35,3 +35,4 @@ test_cpp /tools /runqslower /bench +/FEATURE-DUMP.selftests.bpf diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 894192c319fb..f21c4841a612 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -104,8 +104,46 @@ OVERRIDE_TARGETS := 1 override define CLEAN $(call msg,CLEAN) $(Q)$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN) + $(Q)$(RM) $(OUTPUT)/FEATURE-DUMP.selftests.bpf endef +# This will work when bpf is built in tools env. where srctree +# isn't set and when invoked from selftests build, where srctree +# is set to ".". building_out_of_srctree is undefined for in srctree +# builds +ifeq ($(srctree),) +update_srctree := 1 +endif +ifdef building_out_of_srctree +update_srctree := 1 +endif +ifeq ($(update_srctree),1) +srctree := $(patsubst %/,%,$(dir $(CURDIR))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +endif + +FEATURE_USER = .selftests.bpf +FEATURE_TESTS = clang-bpf-atomics +FEATURE_DISPLAY = clang-bpf-atomics + +check_feat := 1 +NON_CHECK_FEAT_TARGETS := clean +ifdef MAKECMDGOALS +ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) + check_feat := 0 +endif +endif + +ifeq ($(check_feat),1) +ifeq ($(FEATURES_DUMP),) +include $(srctree)/tools/build/Makefile.feature +else +include $(FEATURES_DUMP) +endif +endif + include ../lib.mk SCRATCH_DIR := $(OUTPUT)/tools -- 2.29.2.454.gaff20da3a2-goog
