Use of COMPAT Kernel Options

[APseudoUtopia]

On Fri, Dec 4, 2009 at 5:04 PM, Gardner Bell <gbell72 at rogers.com> wrote:
> --- On Fri, 12/4/09, Roland Smith <rsmith at xs4all.nl> wrote:
>
>> From: Roland Smith <rsmith at xs4all.nl>
>> Subject: Re: Use of COMPAT Kernel Options
>> To: "APseudoUtopia" <apseudoutopia at gmail.com>
>> Cc: "FreeBSD Questions" <freebsd-questions at freebsd.org>
>> Date: Friday, December 4, 2009, 9:52 PM
>> On Fri, Dec 04, 2009 at 04:39:59PM
>> -0500, APseudoUtopia wrote:
>> > Hello,
>> >
>> > I'm working on editing the kernel configuration file
>> for a custom
>> > kernel. The system will be running FreeBSD
>> 8.0-RELEASE-p1. I'm
>> > wondering about the use of the COMPAT options in the
>> kernel config.
>> > COMPAT_43
>>
>> Well, COMPAT_43 one isn't even in GENERIC anymore, so I
>> guess it is not that
>> important anymore.
>>
>> > COMPAT_43TTY
>>
>> This is still in the GENERIC kernel. I'd keep it in
>> initially. Then build a
>> kernel without it. If that fails to start the system
>> properly, you'll always
>> have a good kernel to fall back on.
>>
>> Have a look at what is written under COMPATIBILITY OPTIONS
>> in /sys/conf/NOTES.
>>
>> > COMPAT_FREEBSD[4-7]
>>
>> If you do not have binaries from ealier FreeBSD versions
>> around, you can skip
>> these.
>>
>
> FWIW, a FreeBSD 8.0 kernel fails to build without COMPAT_FREEBSD7 so I'd keep that.
>
>

It didn't for me....I initially compiled with not a single COMPAT
option before I sent the mail to this list. I wanted to inquire about
it before I installed the kernel. But it did build with no COMPAT
options at all....