Hi Ihor!

> Cannot reproduce.

I think this is more likely to happen to users who actually compile on 
boxes with very high CPU/thread count.
A common user with ~8 threads probably will not hit this issue
(I also could not reproduce this on my 4c/8t daily-driver).
Regardless if a common users is likely to hit those errors, they could 
indicate that there are some bugs in the Makefiles.

> Could you please provide a more clear recipe to reproduce, if possible?

There are logs in the bug report on the Gentoo Bugzilla,
from the bug I had already mentioned:
https://884243.bugs.gentoo.org/attachment.cgi?id=839581
and from the one occurring with the documentation generation process:
https://884403.bugs.gentoo.org/attachment.cgi?id=840181

> what exactly emake does differently

Not much, it is just a wrapper for make that adds the MAKEOPTS variable 
from the Portage configuration.
You can see the exact make command in the logs, that is:
- for bug 884243: make -j62 ORGVERSION=9.6 
datadir=/usr/share/emacs/etc/org-mode
- and for 884403: make -j63 pdf card

Thanks for taking a look at it!

On 12/5/22 14:34, Ihor Radchenko wrote:
> Maciej Barć <xgqt@gentoo.org> writes:
> 
>> Hello!
>>
>> The 9.6 release fails to build with multiple jobs (-j62).
>> This issue was found automatically by the Gentoo Tinderbox CI.
>> Link to the Gentoo bug report: https://bugs.gentoo.org/884243
> 
> Thanks for reporting!
> 
> I tried
> 
> cd /tmp
> git clone --depth=1 git://git.savannah.gnu.org/emacs/org-mode.git
> cd org-mode
> make -j64
> 
> Cannot reproduce.
> 
> The error discussed might happen when make clean is not properly
> executed.
> 
> Could you please provide a more clear recipe to reproduce, if possible?
> I do not remember what exactly emake does differently compared to the above.
> 

-- 
Have a great day!

~ Maciej XGQT Barć