X-Recipient: archive-cygwin AT delorie DOT com X-Original-To: cygwin AT cygwin DOT com Delivered-To: cygwin AT cygwin DOT com DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com A09F7269641 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=efficios.com; s=default; t=1583787710; bh=sLJHVWN/rRhJ9oJAiRnrVYVoMoEV07xMsg2MhxqKZJ4=; h=To:From:Message-ID:Date:MIME-Version; b=tdtQgcFAo2zYzafppLC3WHgonQMoAPF3JJQug9bEkqwJZdJY/ShFkLXeF5DxwRTph AP0fiYdY9canFPvdC82+Ns11SYv4iM+3hi/E9S5wZerDT5itZAUWDgslo6lM0gAcur cnpbHrzXAdatmuYMQt1D7pLEuu5qRLs5dOXAg44m4KnFBu4x6BwnWhmATHDcHJ7XBZ kykzTdDUBEp8beSYzlZ+lekuhMZfuyKOEUlbNKiy2BW+knoWn/bmv8n+vj2R4rXn6o 06/FDDeCW9mDoGzySP712vtgS0zFsKaBGRz7u4P4vwxHw93SNRdLN9a2QfjoH/blfh r8EfrizxUqKAQ== X-Virus-Scanned: amavisd-new at efficios.com To: 10walls AT gmail DOT com References: <1adb66fe-fa05-225c-6996-7b9ba8f2a90b AT gmail DOT com> Subject: Re: Cygwin libtool confused about link library In-Reply-To: <1adb66fe-fa05-225c-6996-7b9ba8f2a90b@gmail.com> From: Simon Marchi Message-ID: <7266f738-eddd-14b2-9908-846faa76290d@efficios.com> Date: Mon, 9 Mar 2020 17:01:50 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 Content-Language: tl X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, SPF_HELO_NONE, SPF_PASS autolearn=ham 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 AT cygwin DOT com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Cygwin mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cygwin AT cygwin DOT com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: cygwin-bounces AT cygwin DOT com Sender: "Cygwin" > Hello libtool folks, > Any ideas about this? Something confused the file magic command? > dlltool --identify does show libdl.a is associated with cygwin1.dll for > example. Hi, I stumbled on this and dug into libtool, here's what I found. As part of the process of identifying the nature these libraries, libtool uses this nm + sed snippet [1]: win32_nmres=`eval $NM -f posix -A \"$func_to_tool_file_result\" | $SED -n -e ' 1,100{ / I /{ s|.*|import| p q } }'` ;; The sed scripts looks for a line containing the " I " string. With binutils < 2.34, the nm output looked like: /usr/lib/libdl.a[d000000.o]: libdl_dll_iname I 0000000000000000 With binutils 2.34, the corresponding line is: /usr/lib/libdl.a[d000000.o]: libdl_dll_iname D 0 And therefore the library is mis-identified. The commit that introduced this regression is: commit a288c270991de1578ad28ac312120f4167347234 Author: Alan Modra Date: Fri May 3 21:36:46 2019 +0930 PR24511, nm should not mark symbols in .init_array as "t" I tried building the latest commit on the binutils-2_34-branch, and the behavior has been restored (the line shows " I " again). The commit that restored the behavior is: commit 40bfb9762747f8336b17c70a0173d10200fa62eb Author: Alan Modra Date: Thu Feb 27 17:28:47 2020 +1030 Re: PR24511, nm should not mark symbols in .init_array as "t" So this should all go back to normal when there is a binutils 2.34.1 release and it is packaged by Cygwin. In the mean time, the commit that restored the behavior could maybe be backported in the Cygwin package, but I don't know what the habits are in Cygwin for this kind of thing. Simon [1] https://github.com/autotools-mirror/libtool/blob/b9b44533fbf7c7752ffd255c3d09cc360e24183b/build-aux/ltmain.in#L3050-L3059 "--Problem reports: http://cygwin.com/problems.htmlFAQ: http://cygwin.com/faq/Documentation: http://cygwin.com/docs.htmlUnsubscribe info: http://cygwin.com/ml/#unsubscribe-simple"