Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine

From: Helge Hafting <helge.hafting@aitel.hist.no>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Rob Landley <rob@landley.net>,
	linux-kernel@vger.kernel.org, linux-tiny@selenic.com,
	devel@laptop.org
Subject: Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine
Date: Mon, 28 Aug 2006 12:52:57 +0200	[thread overview]
Message-ID: <44F2CB09.2010809@aitel.hist.no> (raw)
In-Reply-To: <1156538115.3038.6.camel@pmac.infradead.org>

David Woodhouse wrote:
> On Fri, 2006-08-25 at 16:11 -0400, Rob Landley wrote:
>   
>> BusyBox has been doing this for months now: "build at once" is one of our 
>> config options.  I'd like to point out that gcc eats needs several hundred 
>> megabytes of ram to do this and you have no useful progress indicator between 
>> starting and ending.  But the result is definitely smaller.
>>     
>
> It isn't that bad when you're only building a few files at a time -- I
> wouldn't suggest doing it for the whole kernel.
>   
I suggest a new makefile target for this.

I.e. "make bzImage" as always for those who do development and
recompile after small changes/patches. 

And a "make optImage" (optimized image) when building a
kernel for production use, when you believe compiling every file
and spending lots of extra time is worth it.

Helge Hafting