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Date:      Wed, 21 Feb 2018 10:15:18 -0800
From:      bob prohaska <fbsd@www.zefox.net>
To:        Ian Lepore <ian@freebsd.org>
Cc:        George Rosamond <george@ceetonetechnology.com>, freebsd-arm@freebsd.org, bob prohaska <fbsd@www.zefox.net>
Subject:   Re: Custom kernel for RPi2 and 3
Message-ID:  <20180221181518.GA696@www.zefox.net>
In-Reply-To: <1519229812.91697.61.camel@freebsd.org>
References:  <20180220161900.GA2345@www.zefox.net> <c1a82728-a6cd-c972-9b54-73baca644528@zyxst.net> <20180221051801.GA73510@www.zefox.net> <d1e2036f-fb9e-71fa-0918-8b904f16a807@ceetonetechnology.com> <1519229812.91697.61.camel@freebsd.org>

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On Wed, Feb 21, 2018 at 09:16:52AM -0700, Ian Lepore wrote:
> On Wed, 2018-02-21 at 05:44 +0000, George Rosamond wrote:
> > bob prohaska:
> > > 
> > > [...]
> > Bob:
> > 
> > This script can generate an /etc/src.conf based on the running system,
> > extracted from /etc/src.conf(5). Since there's no standard /etc/src.conf
> > through FreeBSD versions, it's a hassle to maintain without it.
> > 
> > http://wiki.torbsd.org/doku.php?id=en:a_shell_script_to_convert_src.conf_5_contents_to_an_example_etc_src.conf_file
> > 
> > HTH
> 
> That script looks like a really complicated way to do:
> 
> ? make showconfig __MAKE_CONF=/dev/null SRCCONF=/dev/null
> 
> -- Ian

Is there a straightforward way to sort what's being used from what
can't (or isn't) being used? For example, on a Pi2 the command emits
MK_WIRELESS      = yes
MK_WIRELESS_SUPPORT = yes
Given that there's no onboard wireless and no USB WiFi adapter, it's
fairly obvious those two can be set to "no". It's less clear what 
MK_TEXTPROC      = yes
portends, and whether it's essential.

Perhaps I mis-posed the original question. What I'm looking for might
better be called a minimal kernel configuration supporting only the
hardware native to a particular board. The old RPI2 kernel config file
seemed to do that, but I gather it's deprecated. 

Thanks for reading!

bob prohaska
 



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