From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gnu.wildebeest.org (gnu.wildebeest.org [45.83.234.184]) by sourceware.org (Postfix) with ESMTPS id 082A43858D1E for ; Wed, 21 Dec 2022 15:21:39 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 082A43858D1E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=wildebeest.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=wildebeest.org Received: from tarox.wildebeest.org (83-87-18-245.cable.dynamic.v4.ziggo.nl [83.87.18.245]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by gnu.wildebeest.org (Postfix) with ESMTPSA id DCD49300071A; Wed, 21 Dec 2022 16:21:37 +0100 (CET) Received: by tarox.wildebeest.org (Postfix, from userid 1000) id 9E3CC413CD0E; Wed, 21 Dec 2022 16:21:37 +0100 (CET) Message-ID: Subject: Re: =?UTF-8?Q?=E2=98=A0?= Buildbot (GNU Toolchain): elfutils-try-debian-armhf - failed compile (failure) (users/marxin/try-zstd-support-v2) From: Mark Wielaard To: Martin =?UTF-8?Q?Li=C5=A1ka?= Cc: elfutils-devel@sourceware.org Date: Wed, 21 Dec 2022 16:21:37 +0100 In-Reply-To: <20e14ca61f27119efca8e1e38292d82ac3048ec8.camel@klomp.org> References: <20221221111547.74C4C385B50B@sourceware.org> <3bfe6caf-c08e-583e-a98c-4acdb47530f9@suse.cz> <20e14ca61f27119efca8e1e38292d82ac3048ec8.camel@klomp.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Evolution 3.28.5 (3.28.5-10.el7) Mime-Version: 1.0 X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00,KAM_DMARC_STATUS,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hi, On Wed, 2022-12-21 at 15:42 +0100, Mark Wielaard wrote: >=20 > Unfortunately buildbot itself doesn't show the config.log. > Trying to get that... >=20 > configure:6961: checking for library containing ZSTD_compressStream2 > configure:6992: gcc -o conftest -D_FORTIFY_SOURCE=3D3 -g -O2 > -fsanitize=3Dundefined=20 > -fno-sanitize-recover -fsanitize=3Daddress -fno-sanitize- > recover conftest.c -llz > ma -lbz2 >&5 > /usr/bin/ld: /tmp/ccKZnuYA.o: in function `main': > /var/lib/buildbot/workers/wildebeest/elfutils-try-debian- > armhf/build/conftest.c: > 30: undefined reference to `ZSTD_compressStream2' > collect2: error: ld returned 1 exit status > configure:6992: $? =3D 1 > configure: failed program was: > > /* confdefs.h */ > > #define PACKAGE_NAME "elfutils" > > #define PACKAGE_TARNAME "elfutils" > > #define PACKAGE_VERSION "0.188" > > #define PACKAGE_STRING "elfutils 0.188" > > #define PACKAGE_BUGREPORT "https://sourceware.org/bugzilla" > > #define PACKAGE_URL "http://elfutils.org/" > > #define PACKAGE "elfutils" > > #define VERSION "0.188" > > #define DEFAULT_AR_DETERMINISTIC false > > #define HAVE_VISIBILITY 1 > > #define HAVE_STDATOMIC_H 1 > > #define _FILE_OFFSET_BITS 64 > > #define CHECK_UNDEFINED 1 > > #define USE_ZLIB 1 > > #define USE_BZLIB 1 > > #define USE_LZMA 1 > > /* end confdefs.h. */ > >=20 > > /* Override any GCC internal prototype to avoid an error. > > Use char because int might match the return type of a GCC > > builtin and then its argument prototype would still apply. */ > > #ifdef __cplusplus > > extern "C" > > #endif > > char ZSTD_compressStream2 (); > > int > > main () > > { > > return ZSTD_compressStream2 (); > > ; > > return 0; > > } >=20 > configure:6992: gcc -o conftest -D_FORTIFY_SOURCE=3D3 -g -O2 > -fsanitize=3Dundefined=20 > -fno-sanitize-recover -fsanitize=3Daddress -fno-sanitize- > recover conftest.c -lzs > td -llzma -lbz2 >&5 > configure:6992: $? =3D 0 > configure:7009: result: -lzstd >=20 > ehe? So it fails and then succeeds anyway? >=20 > Strangely the same happens for the other compression library > checks... > lzma_auto_decoder and BZ2_bzdopen >=20 > I don't fully understand this. Oddly the same seems to happen locally > on my x86_64 box. So maybe the configure macros we have been using > have > always been bad/broken? No, this is "normal". It first tries without the -l library (which is the failing case) and then with the -l library (which succeeds). What goes wrong is that this debian old stable arm setup has libzstd containing a ZSTD_compressStream2 symbol... 40: 0000d349 264 FUNC GLOBAL DEFAULT 11 ZSTD_compressStream2 But the zstd.h header doesn't expose it... /**************************************************************************= ***** ********* * ADVANCED AND EXPERIMENTAL FUNCTIONS **************************************************************************= ***** ********* * The definitions in the following section are considered experimental. * They are provided for advanced scenarios. * They should never be used with a dynamic library, as prototypes may chan= ge in the future. * Use them only in association with static linking. * ************************************************************************= ***** **********/ #if defined(ZSTD_STATIC_LINKING_ONLY) && !defined(ZSTD_H_ZSTD_STATIC_LINKIN= G_ONLY) ... grmbl. This is somewhat unfortunate. We need a smarter configure check for this... Cheers, Mark