From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 24427 invoked by alias); 12 Jan 2012 16:15:52 -0000 Received: (qmail 24413 invoked by uid 22791); 12 Jan 2012 16:15:49 -0000 X-SWARE-Spam-Status: No, hits=-2.7 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_CX,TW_DC,TW_GC,TW_GX X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 12 Jan 2012 16:15:36 +0000 From: "markus at trippelsdorf dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/51832] [4.7 regression] Rev.182970 causes LTO link errors (multiple definitions of allocator_traits) Date: Thu, 12 Jan 2012 16:15:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: markus at trippelsdorf dot de X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-01/txt/msg01390.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51832 --- Comment #5 from Markus Trippelsdorf 2012-01-12 16:15:32 UTC --- (In reply to comment #4) > (In reply to comment #2) > > error: /tmp/ccZEKdVj.o: multiple definition of > > '_ZNSt16allocator_traitsISaIiEE18__construct_helperIiJiEE5valueE' > > That symbol is an extra-name alias for > > std::allocator_traits >::__construct_helper int>::value > > created by mangle_decl for forward ABI compatibility. > > But I can't reproduce the bug; that variable isn't emitted at all when I > compile the reduced testcase with r183124. Hmm, that's strange. I've updated binutils and gcc just to double-check and it still fails: (Please note that foo.cpp occurs _twice_ below) % g++ -shared foo.cpp foo.cpp -flto -std=c++11 --save-temps /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld: error: foo.o: multiple definition of 'std::allocator_traits >::__construct_helper::value' /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld: foo.o: previous definition here [Leaving LTRANS /tmp/ccXhj6nz.args] [Leaving LTRANS /tmp/ccLh8B76.ltrans.out] [Leaving LTRANS /tmp/ccIB53Wt.args] [Leaving LTRANS /tmp/ccLh8B76.ltrans0.o] collect2: error: ld returned 1 exit status % < foo.res 2 foo.o 2 164 ac8416e1b427b8aa PREVAILING_DEF_IRONLY_EXP _ZNSt16allocator_traitsISaIiEE18__construct_helperIiJiEE5valueE 170 ac8416e1b427b8aa UNDEF _ZNSt16allocator_traitsISaIiEE18__construct_helperIiIiEE5valueE foo.o 2 164 ac8416e1b427b8aa PREEMPTED_IR _ZNSt16allocator_traitsISaIiEE18__construct_helperIiJiEE5valueE 170 ac8416e1b427b8aa UNDEF _ZNSt16allocator_traitsISaIiEE18__construct_helperIiIiEE5valueE % gcc -v Using built-in specs. COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.0/gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.7.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc/configure --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.0 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/include/g++-v4 --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec --disable-fixed-point --without-ppl --without-cloog --enable-lto --enable-nls --without-included-gettext --with-system-zlib --disable-werror --enable-initfini-array --with-gold --enable-secureplt --disable-multilib --enable-libmudflap --disable-libssp --enable-libgomp --enable-cld --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.7.0/python --enable-checking=release --disable-libgcj --enable-languages=c,c++ --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --with-build-config=bootstrap-lto --with-boot-ldflags=-Wl,-O1,--hash-style=gnu,--as-needed,--gc-sections,--icf=all,--icf-iterations=3 --enable-version-specific-runtime-libs --disable-libstdcxx-pch --enable-libstdcxx-time=yes Thread model: posix gcc version 4.7.0 20120112 (experimental) (GCC) % ld -v GNU gold (GNU Binutils 2.22.51.20120112) 1.11