From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-so.shaw.ca (smtp-out-so.shaw.ca [64.59.136.137]) by sourceware.org (Postfix) with ESMTPS id 7F8723857C74 for ; Wed, 16 Sep 2020 15:50:14 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 7F8723857C74 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=SystematicSw.ab.ca Authentication-Results: sourceware.org; spf=none smtp.mailfrom=brian.inglis@systematicsw.ab.ca Received: from [192.168.1.104] ([24.64.172.44]) by shaw.ca with ESMTP id IZhDkDzvRLWW5IZhFkhb82; Wed, 16 Sep 2020 09:50:13 -0600 X-Authority-Analysis: v=2.4 cv=Z5JSoFdA c=1 sm=1 tr=0 ts=5f623435 a=kiZT5GMN3KAWqtYcXc+/4Q==:117 a=kiZT5GMN3KAWqtYcXc+/4Q==:17 a=IkcTkHD0fZMA:10 a=w_pzkKWiAAAA:8 a=JZeu4sPTHj9YQVegERsA:9 a=QEXdDO2ut3YA:10 a=sRI3_1zDfAgwuvI8zelB:22 Reply-To: cygwin@cygwin.com Subject: Re: please add bear package To: cygwin@cygwin.com References: <36afa6ff-5f5c-610a-0941-96185646c16d@SystematicSw.ab.ca> From: Brian Inglis Autocrypt: addr=Brian.Inglis@SystematicSw.ab.ca; prefer-encrypt=mutual; keydata= mDMEXopx8xYJKwYBBAHaRw8BAQdAnCK0qv/xwUCCZQoA9BHRYpstERrspfT0NkUWQVuoePa0 LkJyaWFuIEluZ2xpcyA8QnJpYW4uSW5nbGlzQFN5c3RlbWF0aWNTdy5hYi5jYT6IlgQTFggA PhYhBMM5/lbU970GBS2bZB62lxu92I8YBQJeinHzAhsDBQkJZgGABQsJCAcCBhUKCQgLAgQW AgMBAh4BAheAAAoJEB62lxu92I8Y0ioBAI8xrggNxziAVmr+Xm6nnyjoujMqWcq3oEhlYGAO WacZAQDFtdDx2koSVSoOmfaOyRTbIWSf9/Cjai29060fsmdsDLg4BF6KcfMSCisGAQQBl1UB BQEBB0Awv8kHI2PaEgViDqzbnoe8B9KMHoBZLS92HdC7ZPh8HQMBCAeIfgQYFggAJhYhBMM5 /lbU970GBS2bZB62lxu92I8YBQJeinHzAhsMBQkJZgGAAAoJEB62lxu92I8YZwUBAJw/74rF IyaSsGI7ewCdCy88Lce/kdwX7zGwid+f8NZ3AQC/ezTFFi5obXnyMxZJN464nPXiggtT9gN5 RSyTY8X+AQ== Organization: Systematic Software Message-ID: <1449c825-422f-2646-88b9-77a2c69fea52@SystematicSw.ab.ca> Date: Wed, 16 Sep 2020 09:50:11 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4xfMukLCaOqhJlgZoUTjZDVgK8hpNX//AORNqgUE5Il3Y7QJwR7w7/WXX+l2ZrPZMmP8TX61dIL3TAHnddUiasoRQNQYOxxd/0Mp4I/bTLRf5cJscjh9pv zGJaC8aGXFgLR1cSg8wITan5f0l20K/3VdLT3SxKZklaqQG8O/ZLs9oCP+qZornxPb2Ck3rKQIqYV5hcon4kPl/3t6pQb2jkSJk= X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, NICE_REPLY_A, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Sep 2020 15:50:15 -0000 On 2020-09-16 08:42, Eliot Moss wrote: > On 9/16/2020 10:35 AM, Brian Inglis wrote: >> On 2020-09-15 23:34, Thomas Wolff wrote: >>> Am 16.09.2020 um 05:27 schrieb anlex N via Cygwin: >>>> Bear is a tool that generates a compilation database for clang tooling. >>> You cannot expect anyone to go on bear hunt and make a package for you. >>> On the cygwin.com page you find information about how to propose and build >>> packages. >> >> "Bear currently only works on Unix-based systems (FreeBSD, GNU/Linux and macOS), >> since it’s heavily relying on the LD_PRELOAD mechanism on *BSD/Linux and its >> macOS counterpart to intercept the system calls." > > Some old posts suggest that LD_PRELOAD works for overloading functions that > Cygwin provides.  I can't swear to it myself :-) ... There's functionality there but no docs to say what's possible: - does dlsym(RTLD_DEFAULT,name) return the original entry point, as (unsupported) RTLD_NEXT would on other systems? - can they hook core Cygwin, newlib, library package dynamic, static entry points? - can it decide whether to call original, change return code? Would probably be an R&D exercise, not just a straight port. -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. [Data in IEC units and prefixes, physical quantities in SI.]