Heads up: Problems with parallel make

Ken Brown kbrown@cornell.edu
Tue Feb 14 02:33:29 GMT 2023

On 2/13/2023 6:05 PM, Ken Brown via Cygwin-apps wrote:
> Several of my packages that used to build fine with parallel make now 
> require 'make -j1'.  Without this I either get strange errors or a hang.
> I can't find any pattern to explain when the problem occurs and when it 
> doesn't, but it seems to be due to a change in make, starting with 
> version 4.4.  By default, make now uses a FIFO rather than a pipe in its 
> jobserver implementation.  You can override this with the make flag
>    --jobserver-style=pipe
> In all cases where I've tried this, parallel make works again.
> It wouldn't surprise me if there's a bug in Cygwin's FIFO implementation 
> that's responsible for this, but I haven't yet tried to track it down.

I've now reported this upstream:



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