perf build: Use FEATURE-DUMP in bpf subproject

Using FEATURE-DUMP in bpf subproject for features detection in case bpf
is built via perf. Keeping the current features detection otherwise.

Signed-off-by: Jiri Olsa <[email protected]>
Tested-by: Wang Nan <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: pi3orama <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 636e3ddb93a14a8e7a5d0946ed2ac1278bc090bd..919b71780710005008ced1101dce7157e9600486 100644 (file)
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -80,7 +80,11 @@ endif
 endif
 
 ifeq ($(check_feat),1)
+ifeq ($(FEATURES_DUMP),)
 include $(srctree)/tools/build/Makefile.feature
+else
+include $(FEATURES_DUMP)
+endif
 endif
 
 export prefix libdir src obj

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 569fcf022531ef2227e2ec8e4a57dfc278b39f01..404e3b1c4e31253bdf4d081cb8d35be88b941ac0 100644 (file)
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -436,7 +436,7 @@ $(LIBAPI)-clean:
        $(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) clean >/dev/null
 
 $(LIBBPF): fixdep FORCE
-       $(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) $(OUTPUT)libbpf.a
+       $(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) $(OUTPUT)libbpf.a FEATURES_DUMP=$(realpath $(OUTPUT)FEATURE-DUMP)
 
 $(LIBBPF)-clean:
        $(call QUIET_CLEAN, libbpf)