linux-kernel - Re: [PATCH 1/3] kbuild: handle non-existing options in scripts/config

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Date:	Mon, 25 May 2009 15:21:11 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] kbuild: handle non-existing options in scripts/config

Andi Kleen napsal(a):
>> -replace() {
>> -	sed -i -e "$@" $FN
>> +# set_var name value [before-var]
>> +set_var() {
>> +	awk -vvar="$1" -vnew="$2" -vbefore="$3" '
> 
> This seems rather complicated compared to what was there before.

Calling the function is simpler otoh...


> I would just cmp the output file to the input file and if they are
> the same then add it at the end with a echo

Just doing that would duplicate the variable if it was already set to
the desired value, causing a "warning: override: reassigning to symbol"
warning from kbuild.

Hmm, willll try to simplify it somehow.


> 
>> +	}
>> +	' "$FN" >"$FN.tmp"
> 
> This should be a &&, otherwise you risk removing the output file
> on ctrl-c

Ah, good point.

Michal
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