svn commit: r290433 - in head: share/mk sys/conf tools/build/options

[Bryan Drewery]

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 at freebsd.org
>> <mailto:bdrewery at 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 once
>>     more testing
>>       has been done, such as a ports exp-run, and with more compilers.
>>
>>
>> I put WITH_FAST_DEPEND="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 bootstrap:
>>
>> https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/1311/console
>>
>> If you put these entries in make.conf:
>>
>> TARGET=sparc64
>> WITH_FAST_DEPEND=yes
>>
>> and do:
>>
>> make -j 4 buildworld __MAKE_CONF=make.conf
>>
>> That seems to trigger it.
>>
>> Can you take a look?
>>
> 
> 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.
> 
> 

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.

-- 
Regards,
Bryan Drewery

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