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Tue, 06 Jun 2023 17:01:08 +0200 Received: from oxbe16.tb.ukmail.iss.as9143.net ([172.25.160.147]) by smtp1.tb.ukmail.iss.as9143.net with ESMTP id 6YBIqWhrmhvLN6YBIquzqx; Tue, 06 Jun 2023 17:01:08 +0200 X-Env-Mailfrom: p.w.stephenson@ntlworld.com X-Env-Rcptto: zsh-workers@zsh.org X-SourceIP: 172.25.160.147 X-CNFS-Analysis: v=2.4 cv=SZoxNNdu c=1 sm=1 tr=0 ts=647f4a34 cx=a_exe a=8o1wE8L0/p9P1PBsv+/Cew==:117 a=1DWFKdCB1IcA:10 a=IkcTkHD0fZMA:10 a=NLZqzBF-AAAA:8 a=rHi9-FS9hKSq0uvxnf4A:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 a=V2A-AyyUBAfGkCDj3hnw:22 a=75Kt_H3ikK-EkTT1woid:22 X-Authenticated-Sender: p.w.stephenson@ntlworld.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ntlworld.com; s=meg.feb2017; t=1686063668; bh=KMhLXvNDI/KY/uEFKBLqIMUdslxyT5LmF/J6o2T1waQ=; h=Date:From:To:In-Reply-To:References:Subject; b=4ivKRFlyLG725zU+2JCahWG6cI3A2975LgpHsdN9YNdIZ+pVrvvu6WcLr3xaIfFaU l7hOL5+C0ToQI0nVMyWmhrVCo2PIJA5G7zYohqbOJwefIa4OM+h12BmpwjWgFJYo5M IXhWp/JEbhMUKCH4W8d/TqjZ+pYlhsym8eKm8f1QqAQmnpoBmyjvEJ711JhA4126nc UCS//T/bU9dTTEPdv18LzpR3vHL1PzudWeWayH+w/4VCnQU3R+22E1CbkAlXIMTCVP WT07DV5pCASaAEkFxq5WzWXMVMAuXhvsN0DsQQohueuaXT90P4gY+VhrRJOPdTPG3/ nBuyN7eZV8bDQ== Date: Tue, 6 Jun 2023 16:01:08 +0100 (BST) From: Peter Stephenson To: zsh-workers@zsh.org Message-ID: <890683328.5067391.1686063668614@mail.virginmedia.com> In-Reply-To: <9B5553E5-9CBD-4E6A-88E4-2ABFA1305552@kba.biglobe.ne.jp> References: <027f2a491b638e2ffaf7766fe4adf29537c11fdf.camel@fifi.org> <227fe72b-7441-935c-55a7-421945da54b3@hostalia.de> <1604572963.1688389.1686042332603@mail.virginmedia.com> <9B5553E5-9CBD-4E6A-88E4-2ABFA1305552@kba.biglobe.ne.jp> Subject: Re: [Bug] modules zsh/tcp, zsh/zftp unloadable, probably affecting most modern Linuxes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Priority: 3 Importance: Normal X-Mailer: Open-Xchange Mailer X-Originating-IP: 147.161.224.167 X-Originating-Client: open-xchange-appsuite X-CMAE-Envelope: MS4xfE3dJCu0XCIjNLdhxFE6TkpZ/dsHBPHJDfl0oJO7oojh24oOUQW5jk3sIwZuUI57L6jqIbjyXbB1NF1cswHFTq7p3UH36dQX1mDuYNmNa1lMTmIqfoyy o7JYvasCCgy0NCz+i/lqPbe0eXOYMaazG0Ycet76D/vVy/6VX5AL+iq8zkaR4nGsEnrbJlrIS3Q6sRZvuJWslzUhtTxP5ciaszEtzqzrfzFN0uDwnfEumryT X-Seq: 51837 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: > On 06/06/2023 15:38 Jun. T wrote: > > > > 2023/06/06 18:05, Peter Stephenson wrote: > > > >> On 06/06/2023 07:42 Jun T wrote: > >> > >> Why '-z now' is used when building binary packages? For security? > > > > I think this is just so that failure to find symbols at all will > > show up quickly in the build rather than at run time, which would > > be a real pain. > > I think '-z now' is to mark (add the flag) zftp.so so that the > dynamic linker resolves all the symbols when _loading_ it; > the symbols are not resolved when _building_ zftp.so. Yes, it does say it gets applied at the point of dlopen(), so it's explicitly counteracting RTLD_LAZY. Is this specific to the Fedora configuration in their own source package? I don't see an obvious sign the standard zsh build itself is making this choice. configure has some system-specific tweaks for dynamic loading, but not this. pws