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Date:      Thu, 27 Aug 2015 01:22:43 -0700
From:      Garrett Cooper <yaneurabeya@gmail.com>
To:        "O'Connor, Daniel" <darius@dons.net.au>
Cc:        Pawel Jakub Dawidek <pjd@freebsd.org>, Xin LI <d@delphij.net>, FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: Read-only /usr/obj/ no longer kosher?
Message-ID:  <A0A1F85A-FE1F-42A5-B40F-9EA23231F2F4@gmail.com>
In-Reply-To: <516778C3-2B0E-4F6C-9225-C5218B0A349A@dons.net.au>
References:  <20150823215552.GB1314@garage.freebsd.pl> <55DA492D.4030804@delphij.net> <20150825210437.GB1172@garage.freebsd.pl> <20150825215347.GD1172@garage.freebsd.pl> <20150825215524.GE1172@garage.freebsd.pl> <55DCEA64.8040304@delphij.net> <CAGHfRMBp_Vyyd9H-60H%2BUfWy%2BBek4tby%2BW=84DjxMmqMoTjtCg@mail.gmail.com> <20150826225512.GF1172@garage.freebsd.pl> <516778C3-2B0E-4F6C-9225-C5218B0A349A@dons.net.au>

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> On Aug 26, 2015, at 19:03, O'Connor, Daniel <darius@dons.net.au> wrote:
>=20
>=20
>> On 27 Aug 2015, at 08:25, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
>>> On Tue, Aug 25, 2015 at 03:32:35PM -0700, NGie Cooper wrote:
>>>> On Tue, Aug 25, 2015 at 3:21 PM, Xin Li <delphij@delphij.net> wrote:
>>>> On 08/25/15 14:55, Pawel Jakub Dawidek wrote:
>>>>>> Now that I think of it, it might have been that I did
>>>>>> buildworld/buildkernel before -p1. Then freebsd-update updated
>>>>>> newvers.sh and then I was trying to do installworld.
>>>>>=20
>>>>> Yes, I can now reproduce it with source updated to -p2.
>>>>=20
>>>> Yes, that's because freebsd-version.sh is generated from the files (but=

>>>> it's not clear to me whether if it's a bug or a feature that 'make
>>>> install' checks if it's up-to-date and decides to regenerate it...).
>>>=20
>>> It's a quirk for sure. If you change the behavior, people will
>>> definitely complain as they will now need to go back and rebuild
>>> everything.
>>=20
>> What we have now is misleading. People should recompile. It is rather
>> rare to see security advisory which bumps only patch level and something
>> that doesn't require recompilation (eg. a shell script). Current
>> behaviour would make people think they are running latest patch level
>> because freebsd-version says so, eventhough they only did 'make
>> installworld' without rebuilding affected binaries.
>=20
> So..
> How hard would it be to force CC/CXX to /usr/bin/false during installworld=
?

Trivial in FreeBSD. Just make it so in Makefile for the installworld target,=
 add false to itools, and add appropriate special casing in bsd.compiler.mk.=


Doing this just prevents recompiling though, so not pjd's case.

Also, this might break someone's random usecase where they need CC/CXX to do=
 something meaningful at install time, however, the likelihood of it being c=
orrect is slim IMHO..=



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