From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/8870 Path: news.gmane.org!not-for-mail From: Szabolcs Nagy Newsgroups: gmane.linux.lib.musl.general Subject: Re: some odd library loading errors Date: Tue, 17 Nov 2015 16:23:56 +0100 Message-ID: <20151117152355.GF18372@port70.net> References: <20151117121429.GI26951@example.net> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1447773872 10224 80.91.229.3 (17 Nov 2015 15:24:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 17 Nov 2015 15:24:32 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-8883-gllmg-musl=m.gmane.org@lists.openwall.com Tue Nov 17 16:24:18 2015 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1Zyi78-0005FZ-4E for gllmg-musl@m.gmane.org; Tue, 17 Nov 2015 16:24:10 +0100 Original-Received: (qmail 6011 invoked by uid 550); 17 Nov 2015 15:24:08 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 5992 invoked from network); 17 Nov 2015 15:24:07 -0000 Mail-Followup-To: musl@lists.openwall.com Content-Disposition: inline In-Reply-To: <20151117121429.GI26951@example.net> User-Agent: Mutt/1.5.24 (2015-08-30) Xref: news.gmane.org gmane.linux.lib.musl.general:8870 Archived-At: * u-uy74@aetey.se [2015-11-17 13:14:29 +0100]: > The environment: > Linux 3.# on x#86 > binutils 2.24 > musl 1.1.8 compiled for i486 > gcc 5.2.0 > > (the gcc has arch=i486 as the default) > > No oddities were observed with the above until trying to use libatomic > which is provided by gcc-5.2.0. > > The test case: > > $ cat >a.c <<____ > int main(){ return 0; } > ____ > > $ gcc -o a a.c -L -latomic > > $ LD_LIBRARY_PATH= ./a > Error relocating /libatomic.so.1: __atomic_store_8: symbol not found > Error relocating /libatomic.so.1: __atomic_exchange_8: symbol not found > Error relocating /libatomic.so.1: __atomic_load_8: symbol not found > Error relocating /libatomic.so.1: __atomic_compare_exchange_8: symbol not found > this is a known issue, they use the gnu ifunc extension of elf to dispatch between different implementations based on the machine at library loadtime. > I would appreciate help with finding out who is doing wrong: > - gcc > - ld > - musl > - myself > and what is to be corrected to make it work. > build gcc with --disable-gnu-indirect-function (then i guess libatomic will always use the portable implementation.)