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Date: Tue, 16 Sep 2008 08:05:38 +0200
From: John Hay <jhay@meraka.org.za>
To: "M. Warner Losh" <imp@bsdimp.com>
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References: <48CF1979.90507@errno.com> <48CF2975.3010908@elischer.org>
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Cc: arch@freebsd.org, julian@elischer.org
Subject: Re: the more build knobs bikeshed
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On Mon, Sep 15, 2008 at 11:55:22PM -0600, M. Warner Losh wrote:
> In message: <48CF2975.3010908@elischer.org>
>             Julian Elischer <julian@elischer.org> writes:
> : > With these changes I can build a nanobsd image for x86 or arm that is 
> : > <1/2 the size you can get otherwise (using just the standard knobs).  If 
> : > you do not use the knobs you should get exactly what you're used to 
> : > getting.
> : 
> : tinybsd gets its apps together and then uses ldd on each to get the 
> : minimum set of libraries as well.
> : (though that doesn't help with programs that dlopen a bunch of stuff
> : such as natd which dlopens all teh libalias*.so libs).
> 
> And it doesn't work with cross building because of its use of LDD.  It
> needs to use the NEEDED lines in objdump to get this information.

I have been using this in a script on an i386 box to build small i386 and
arm distros:

llst=`readelf --dynamic ${sdir}/${f} 2> /dev/null | awk '/Shared library/ { print $5 }' | sed -E -e 's/\[|\]//g'` 

John
-- 
John Hay -- John.Hay@meraka.csir.co.za / jhay@FreeBSD.org