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

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Message-ID: <20151202072725.GA26580@amd>
Date:	Wed, 2 Dec 2015 15:24:45 +0100
From:	Pavel Machek <pavel@....cz>
To:	Alexander Kapshuk <alexander.kapshuk@...il.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	jim.epost@...il.com, richard@....at, tytso@....edu
Subject: Re: [PATCH 01/22] ver_linux: gcc -dumpversion, use regex to find
 version number

On Mon 2015-10-12 21:39:41, Alexander Kapshuk wrote:
> Rely on regex to find the version number, rather than a field
number.

Are you sure that is good idea?

I'd say that the field number is going to fail in more obvious way,
which is a good thing.
								Pavel

> 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}'

-- 
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