Heads up: Problems with parallel make

[Ken Brown]

On 2/20/2023 2:12 PM, Marco Atzeri via Cygwin-apps wrote:
> 
> 
> On 20.02.2023 18:34, Marco Atzeri wrote:
>> On 20.02.2023 18:14, Ken Brown via Cygwin-apps wrote:
>>> On 2/20/2023 12:00 PM, Achim Gratz via Cygwin-apps wrote:
>>>> Ken Brown via Cygwin-apps writes:
>>>>> Thanks, Marco.  As expected, that fixes the problem for my test case
>>>>> (building TeX Live).  Obviously it would be better if the make
>>>>> developers would provide a configure option to use a pipe for the
>>>>> jobserver, but this is a good workaround if they don't.
>>>>
>>>> Does it actually do a parallel build?  I've quickly tested a cmake 
>>>> based
>>>> project with it and it completely serializes the build.  Reverting to
>>>> 4.4 resolves that problem.
>>
> 
> uploaded as test 4.4.0.91-1
> 
> 
> following message is still present while missing in 4.4-1
> 
>> make[1]: warning: jobserver unavailable: using -j1.  Add '+' to parent 
>> make rule.
>>
> 
> and I do not see clear evidence of parallelism like in 4.4-1
> 
>>>
>>> It does for my build of TeX Live.  I just tried 'make -j13 check', 
>>> and I saw many make processes and many sh processes running at once.  
>>> [But I'm currently testing a self-built make 4.4.0.91.]
>>>
>>> Ken
>>
> 
> How are you configuring your build ?

Just a plain vanilla build, no configure options.

Ken