linux-kernel - [PATCH] perf: version incorrect with some versions of grep

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Message-Id: <1300241800-30281-1-git-send-email-johunt@akamai.com>
Date:	Tue, 15 Mar 2011 19:16:40 -0700
From:	Josh Hunt <johunt@...mai.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Tapan Dhimant <tdhimant@...mai.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] perf: version incorrect with some versions of grep

Some versions of grep don't treat '\s' properly. When building perf on
such systems and using a kernel tarball the perf version is unable to be
determined from the main kernel Makefile and the user is left with a version
of '..'. Replacing the use of '\s' with '[[:space:]]', which should work
in all grep versions, gives a usable version number.

Reported-by: Tapan Dhimant <tdhimant@...mai.com>
Signed-off-by: Josh Hunt <johunt@...mai.com>
---
 tools/perf/util/PERF-VERSION-GEN |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/PERF-VERSION-GEN b/tools/perf/util/PERF-VERSION-GEN
index 97d7656..26d4d3f 100755
--- a/tools/perf/util/PERF-VERSION-GEN
+++ b/tools/perf/util/PERF-VERSION-GEN
@@ -23,10 +23,10 @@ if test -d ../../.git -o -f ../../.git &&
 then
 	VN=$(echo "$VN" | sed -e 's/-/./g');
 else
-	eval `grep '^VERSION\s*=' ../../Makefile|tr -d ' '`
-	eval `grep '^PATCHLEVEL\s*=' ../../Makefile|tr -d ' '`
-	eval `grep '^SUBLEVEL\s*=' ../../Makefile|tr -d ' '`
-	eval `grep '^EXTRAVERSION\s*=' ../../Makefile|tr -d ' '`
+	eval $(grep '^VERSION[[:space:]]*=' ../../Makefile|tr -d ' ')
+	eval $(grep '^PATCHLEVEL[[:space:]]*=' ../../Makefile|tr -d ' ')
+	eval $(grep '^SUBLEVEL[[:space:]]*=' ../../Makefile|tr -d ' ')
+	eval $(grep '^EXTRAVERSION[[:space:]]*=' ../../Makefile|tr -d ' ')
 
 	VN="${VERSION}.${PATCHLEVEL}.${SUBLEVEL}${EXTRAVERSION}"
 fi
-- 
1.7.0.4

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