From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f182.google.com ([209.85.220.182]:35480 "EHLO mail-qk0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933700AbcKWSnf (ORCPT ); Wed, 23 Nov 2016 13:43:35 -0500 Received: by mail-qk0-f182.google.com with SMTP id n204so25138196qke.2 for ; Wed, 23 Nov 2016 10:43:35 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <20161123094504.GO12522@twin.jikos.cz> References: <20161123094504.GO12522@twin.jikos.cz> From: Mike Gilbert Date: Wed, 23 Nov 2016 13:43:14 -0500 Message-ID: Subject: Re: btrfs-progs-4.8.3 libbtrfs missing symbols? To: dsterba@suse.cz, linux-btrfs@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Wed, Nov 23, 2016 at 4:45 AM, David Sterba wrote: > On Tue, Nov 22, 2016 at 01:49:15PM -0500, Mike Gilbert wrote: >> Hi, >> >> I received a bug report about a build failure in a package (snapper) >> that utilizes libbtrfs. >> >> https://bugs.gentoo.org/show_bug.cgi?id=600078 >> >> To summarize the issue, the package has a configure test that executes >> the following: >> >> configure:16618: x86_64-pc-linux-gnu-gcc -o conftest -O2 -pipe >> -march=amdfam10 -frecord-gcc-switches -std=c99 -Wall -Wextra >> -Wformat=2 -Wmissing-prototypes -Wno-unused-parameter >> -DCONFDIR='"/etc/conf.d"' -Wl,-O1 -Wl,--as-needed conftest.c -lbtrfs >> >&5 >> /usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libbtrfs.so: >> undefined reference to `lookup_path_rootid' >> collect2: error: ld returned 1 exit status >> configure:16618: $? = 1 >> >> It seems that the "lookup_path_rootid" symbol is not included in the library. >> >> Could someone look into this? > > Thanks for the report, bug reproduced here. My referential snapper build > does not fail so I did not know about that. I've now extended the > library test to cover the missing symbol. As the build does not fail > it's needed to actually run the built binary. That's very strange; I definitely get a build-time failure here. Maybe there's some difference in your toolchain. On current master: floppym@naomi btrfs-progs % make V=1 library-test [LD] library-test gcc -g -O1 -Wall -D_FORTIFY_SOURCE=2 -include config.h -DBTRFS_FLAT_INCLUDES -D_XOPEN_SOURCE=700 -fno-strict-aliasing -fPIC -I/home/floppym/src/btrfs-progs -I/home/floppym/src/btrfs-progs/kernel-lib -o library-test library-test.o -rdynamic -lbtrfs /usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/../../../../lib64/libbtrfs.so: undefined reference to `lookup_path_rootid' collect2: error: ld returned 1 exit status make: *** [Makefile:433: library-test] Error 1