Heads up: Problems with parallel make

[Brian Inglis]

On 2023-02-16 11:57, Marco Atzeri via Cygwin-apps wrote:
> On 16.02.2023 17:49, Brian Inglis via Cygwin-apps wrote:
>> On 2023-02-16 00:47, Marco Atzeri via Cygwin-apps wrote:
>>> On 15.02.2023 19:09, Ken Brown via Cygwin-apps wrote:
>>>> On 2/14/2023 4:23 PM, Marco Atzeri via Cygwin-apps wrote:
>>>>> On 14.02.2023 17:49, Brian Inglis via Cygwin-apps wrote:
>>>>>> There is a make 4.4.1 release candidate 4.40.0.90 with patches that may 
>>>>>> help to deal with this:
>>>>>>      https://alpha.gnu.org/gnu/make/make-4.4.0.90.tar.lz{,.sig}
>>>>>> https://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=110&set=custom

>>>>> test version built and on the way

>>>> The problems I reported with make 4.4 still exist in 4.4.0.90.
>>>> Until someone can figure out why this happens, you might want to consider 
>>>> building make so that it doesn't default to using a FIFO for its jobserver.  
>>>> I suggested to the make developers that they provide a configure option for 
>>>> this purpose.  If they don't do this, I think you could accomplish the same 
>>>> thing by configuring make with ac_cv_func_mkfifo=no.

>>> version 2 uploaded.

>> Might be good to follow up on bug-make at gnu dot org to let them know that 
>> pre-release does not help us, and it has been rereleased building with 
>> ac_cv_func_mkfifo=no which does.

>> I notice that posix_spawn is defaulted, any chance it could be implicated?

> what are you using as test ?
> Standard build tests are fine for both -1 and -2

I'm not seeing make issues so far! x fingers - touch wood - no jinxes! ;^>

Are there high parallel make tests that show the issues with FIFO?

Just aware that if there are issues, sometimes flipping a config option gives a 
different result, and occasionally a fix, or a broken build. :-(

-- 
Take care. Thanks, Brian Inglis			Calgary, Alberta, Canada

La perfection est atteinte			Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter	not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer	but when there is no more to cut
			-- Antoine de Saint-Exupéry