linux-kernel - [tip:perf/core] perf build: Use FEATURE-DUMP in bpf subproject

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Date:	Sat, 9 Jan 2016 08:28:10 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, acme@...hat.com, mingo@...nel.org,
	hpa@...or.com, dsahern@...il.com, jolsa@...nel.org,
	pi3orama@....com, wangnan0@...wei.com, namhyung@...nel.org,
	lizefan@...wei.com, linux-kernel@...r.kernel.org,
	a.p.zijlstra@...llo.nl
Subject: [tip:perf/core] perf build: Use FEATURE-DUMP in bpf subproject

Commit-ID:  58683600dfe377c883eb8217b5a9bfcfe231b3ff
Gitweb:     http://git.kernel.org/tip/58683600dfe377c883eb8217b5a9bfcfe231b3ff
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Wed, 23 Dec 2015 18:58:34 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 6 Jan 2016 20:11:14 -0300

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 <jolsa@...nel.org>
Tested-by: Wang Nan <wangnan0@...wei.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Zefan Li <lizefan@...wei.com>
Cc: pi3orama <pi3orama@....com>
Link: http://lkml.kernel.org/r/1450893514-9158-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/bpf/Makefile   | 4 ++++
 tools/perf/Makefile.perf | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 636e3dd..919b717 100644
--- 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 569fcf0..404e3b1 100644
--- 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)