linux-kernel - [PATCH 01/22] ver_linux: gcc -dumpversion, use regex to find version number

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Message-Id: <1444675202-1375-1-git-send-email-alexander.kapshuk@gmail.com>
Date:	Mon, 12 Oct 2015 21:39:41 +0300
From:	Alexander Kapshuk <alexander.kapshuk@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, jim.epost@...il.com, richard@....at,
	tytso@....edu, Alexander Kapshuk <alexander.kapshuk@...il.com>
Subject: [PATCH 01/22] ver_linux: gcc -dumpversion, use regex to find version number

Rely on regex to find the version number, rather than a field number.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@...il.com>
---
 scripts/ver_linux | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/ver_linux b/scripts/ver_linux
index 7de36df..af6467e 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -11,8 +11,12 @@ echo ' '
 uname -a
 echo ' '
 
-gcc -dumpversion 2>&1| awk \
-'NR==1{print "Gnu C                 ", $1}'
+gcc -dumpversion 2>&1 |
+awk '/[0-9]+([.]?[0-9]+)+/ && !/not found$/{
+	match($0, /[0-9]+([.]?[0-9]+)+/)
+	printf("GNU C\t\t\t%s\n",
+	substr($0,RSTART,RLENGTH))
+}'
 
 make --version 2>&1 | awk -F, '{print $1}' | awk \
       '/GNU Make/{print "Gnu make              ",$NF}'
-- 
2.4.9

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