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Date:      Mon, 9 Nov 2015 13:04:48 -0800
From:      Bryan Drewery <bdrewery@FreeBSD.org>
Cc:        Craig Rodrigues <rodrigc@crodrigues.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
Subject:   Re: svn commit: r290433 - in head: share/mk sys/conf tools/build/options
Message-ID:  <56410A70.2080601@FreeBSD.org>
In-Reply-To: <5640D2F4.6010101@FreeBSD.org>
References:  <201511060445.tA64jUjj063307@repo.freebsd.org> <CAG=rPVcQqj5tb69_ZiugXDDkVN5uxZeKa1y-iO7U1TNV2eo3NA@mail.gmail.com> <5640D2F4.6010101@FreeBSD.org>

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On 11/9/2015 9:08 AM, Bryan Drewery wrote:
> On 11/7/2015 12:41 AM, Craig Rodrigues wrote:
>>
>>
>> On Thu, Nov 5, 2015 at 8:45 PM, Bryan Drewery <bdrewery@freebsd.org
>> <mailto:bdrewery@freebsd.org>> wrote:
>>
>>     Author: bdrewery
>>     Date: Fri Nov  6 04:45:29 2015
>>     New Revision: 290433
>>     URL: https://svnweb.freebsd.org/changeset/base/290433
>>
>>     Log:
>>       Add a FAST_DEPEND option, off by default, which speeds up the
>>     build significantly.
>>
>>       Enabling this by default, for src or out-of-src, can be done onc=
e
>>     more testing
>>       has been done, such as a ports exp-run, and with more compilers.=

>>
>>
>> I put WITH_FAST_DEPEND=3D"yes" in make.conf for these builds:
>>
>> https://jenkins.freebsd.org/job/FreeBSD_HEAD
>> https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc4.9
>> https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64
>>
>>
>> For the FreeBSD_HEAD_sparc64 build, there is a weird failure on bootst=
rap:
>>
>> https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/1311/console
>>
>> If you put these entries in make.conf:
>>
>> TARGET=3Dsparc64
>> WITH_FAST_DEPEND=3Dyes
>>
>> and do:
>>
>> make -j 4 buildworld __MAKE_CONF=3Dmake.conf
>>
>> That seems to trigger it.
>>
>> Can you take a look?
>>
>=20
> I'm finally getting to testing this. My initial guess is that
> WITH_FAST_DEPEND is simply exposing an existing race. The entire
> gnu/usr.bin/cc directory is full of races and duplication with
> generating the headers. Something that has been a problem in META_MODE.=

> So either way I will fix it.
>=20
>=20

I have figured this out and will have a fix in soon. It's a subtle
problem with having multiple files match expected objects based on
suffix transformation rules, that mkdep was avoiding.

--=20
Regards,
Bryan Drewery


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