[tlbuild] Problems with parallel make

[Bruno Haible]

Karl Berry wrote:
>     1. 'make -j13 world' hangs during the 'make install-strip' step, with 
>     several 'make' instances still running.  
> 
> What are they doing? Can you tell from the processes that are running
> when it hangs?
> 
> I can't think of what would be different here than in previous years.

Are you using the same version of 'make' as last year?

At least in recent GNU make versions, there are problems with parallelism
on Cygwin. Reported at
https://lists.gnu.org/archive/html/bug-make/2023-01/msg00134.html .
I don't know about older versions of GNU make, though.

Bruno