linux-kernel - Re: make silentoldconfig question

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Date:	Wed, 31 Aug 2011 16:49:13 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Francis Moreau <francis.moro@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: make silentoldconfig question

On 23.8.2011 10:47, Francis Moreau wrote:
> Hello,
> 
> I'm a bit confused about silentoldconfig target since it doesn't
> really makes any differences with oldconfig.

silentoldconfig is a historical misnomer, nowadays oldconfig is silent
as well. The purpose of silentoldconfig is to generate include/config/*
and include/generated/autoconf.h files before build starts, oldconfig is
the user interface.

> The only difference I found is this one: if I add a new valid symbol
> at the end of my .config (therefore the position of the symbol is
> incorrect) then olconfig will recreate the .config and thus print its
> annoying message "# config written ..." to stdin whereas
> silentoldconfig won't print anything not because it's silent but
> beacuse the .config is not recreated so the symbol is still badly
> located at the end of the file.

Yes, silentoldconfig does not touch .config if no symbol changed. The
user interfaces always save the .config file.

Michal

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