linux-kernel - [PATCH 3/5] tools build feature: Introduce feature

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Message-Id: <1450893514-9158-4-git-send-email-jolsa@kernel.org>
Date:	Wed, 23 Dec 2015 18:58:32 +0100
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Wang Nan <wangnan0@...wei.com>, pi3orama <pi3orama@....com>,
	lizefan@...wei.com
Subject: [PATCH 3/5] tools build feature: Introduce feature_ass macro

The feature_ass macro generates feature value
assignment for name, like:

  $(call feature_ass,dwarf) == feature-dwarf=1

This will be used more in following patches.

Link: http://lkml.kernel.org/n/tip-jst8x3nv43w0h8afu9mfs07p@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/build/Makefile.feature | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 20753124c8f4..bd6eff14c8f9 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -122,8 +122,14 @@ define feature_print_text_code
     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 endef
 
+#
+# generates feature value assignment for name, like:
+#   $(call feature_ass,dwarf) == feature-dwarf=1
+#
+feature_ass = feature-$(1)=$(feature-$(1))
+
 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
-FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
+FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),$(call feature_ass,$(feat)))
 FEATURE_DUMP_FILE := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 
 # The $(feature_display) controls the default detection message
-- 
2.4.3

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