From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from omta002.cacentral1.a.cloudfilter.net (omta002.cacentral1.a.cloudfilter.net [3.97.99.33]) by sourceware.org (Postfix) with ESMTPS id AA14B3858D33 for ; Mon, 13 Feb 2023 23:44:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org AA14B3858D33 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=Shaw.ca Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=shaw.ca Received: from shw-obgw-4004a.ext.cloudfilter.net ([10.228.9.227]) by cmsmtp with ESMTP id RcmNp7zs5l2xSRiUNpsqfw; Mon, 13 Feb 2023 23:44:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=shaw.ca; s=s20180605; t=1676331843; bh=YYO2u3yuPTYE5fXUfE6NCEoRgMQrXdmSAzoEmGZcM1g=; h=Date:Reply-To:Subject:To:References:Cc:From:In-Reply-To; b=YQBNywQ5nQPSJHg0JDxxsC8mWkhmIFvTM83s++DnuyqwpAeuEQH0sS/3kJAtRHUI/ F0CvYIBrhZjCKnAMPxzQCstzpviZM4L5/1kusvAzkQuDWZgDk6HWfFwQy//wgnnOm9 RSWvg4DvTtHm7kgD7swr4oTednt/f2OIbVh4VLAZeszaBGNok7fU2wMbyqwGIt5gEH gT4UDzi/4csindwKYvQ+/FeswHgZqwpR1usCJVL7hdByKYRbehdweK1tbhPpCjG6M5 uzoW65jp5UJMWksiLrJ94Pzcx038KCrkA1hYTifib/ndtjTksht6i/UWZi7vfwAn/7 zFe4XbnwoeSjg== Received: from [10.0.0.5] ([184.64.102.149]) by cmsmtp with ESMTP id RiUMpWL1Y3fOSRiUMpYlYh; Mon, 13 Feb 2023 23:44:03 +0000 X-Authority-Analysis: v=2.4 cv=J8G5USrS c=1 sm=1 tr=0 ts=63eacb43 a=DxHlV3/gbUaP7LOF0QAmaA==:117 a=DxHlV3/gbUaP7LOF0QAmaA==:17 a=IkcTkHD0fZMA:10 a=yPf7pi8k6090NVXkwu8A:9 a=QEXdDO2ut3YA:10 Message-ID: <871214fe-aa00-5c51-7145-82737e830fcc@Shaw.ca> Date: Mon, 13 Feb 2023 16:44:02 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.7.2 Reply-To: cygwin-apps@cygwin.com Subject: Re: Heads up: Problems with parallel make Content-Language: en-CA To: cygwin-apps@cygwin.com References: <9c9fb865-5f11-67ec-81a5-9c1ee37b5ee1@cornell.edu> Cc: Ken Brown From: Brian Inglis Organization: Inglis In-Reply-To: <9c9fb865-5f11-67ec-81a5-9c1ee37b5ee1@cornell.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4xfGFsJ1c+ccUOYQP1DQiTOGlafKmJLJvGp0WBMEmY7hicLyqcr1+ToMuSkan52lnFK5TlTo69dM8+piMFzTtxicswTqdnZC7nq6wDWfRrx8WrQi/JefrA KspPcR48zCHN2it+RFi+IOA/B8ml+hGNkyTtulFvEC4URS6ySkdx5EvckT3keRJDiXPek3tvV68eKndlj4DWO6vQZolzKDYhMFoh7ahUfOx7sO75GKTLXh+o X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 2023-02-13 16:05, 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. There is some glibc? compatibility issue also with this recommended workaround. -- 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