From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1210 invoked by alias); 29 Dec 2010 14:34:15 -0000 Received: (qmail 923 invoked by uid 22791); 29 Dec 2010 14:34:14 -0000 X-SWARE-Spam-Status: No, hits=-2.7 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_CX,TW_DC,TW_JL,TW_LG 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; Wed, 29 Dec 2010 14:34:09 +0000 From: "silver24k at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/47116] New: Linking error: multiple definition of `non-virtual thunk to ...' X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: silver24k at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Wed, 29 Dec 2010 14:34:00 -0000 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: 2010-12/txt/msg02868.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47116 Summary: Linking error: multiple definition of `non-virtual thunk to ...' Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: silver24k@gmail.com When compiling attached sources, I get: $ g++ -O2 -c test0.cpp $ g++ -O2 -c test1.cpp $ g++ -o test.exe test0.o test1.o test1.o:test1.cpp:(.text+0x0): multiple definition of `non-virtual thunk to FooBase::Bar()' test0.o:test0.cpp:(.text+0x0): first defined here collect2: ld returned 1 exit status Changing -O2 to -O0 or -O1 does not help. Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=c:/snowfishroot/mingw/bin/../libexec/gcc/mingw32/4.6.0/lto-wrapper.exe Target: mingw32 Configured with: ../../../gcc_trunk/configure --build=x86_64-unknown-linux-gnu --host=mingw32 --target=mingw32 --prefix=/mingw --disable-win32-registry --enable-shared --enable-static --enable-libgomp --enable-version-specific-runtime-libs --with-gmp=/mingw --with-mpfr=/mingw --with-ppl=/mingw --with-cloog=/mingw --enable-libstdcxx-debug --with-build-time-tools=/platform/cross-on-linux/mingw --disable-nls --with-mpc=/mingw --enable-languages=c,c++ --enable-lto --disable-plugin --enable-checking=release --enable-sjlj-exceptions Thread model: win32 gcc version 4.6.0 20101228 (experimental) COMPILER_PATH=c:/snowfishroot/mingw/bin/../libexec/gcc/mingw32/4.6.0/;c:/snowfishroot/mingw/bin/../libexec/gcc/;c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../../../mingw32/bin/ LIBRARY_PATH=c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/;c:/snowfishroot/mingw/bin/../lib/gcc/;c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../../../mingw32/lib/;c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../../ COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' '-shared-libgcc' '-mtune=generic' '-march=pentiumpro' c:/snowfishroot/mingw/bin/../libexec/gcc/mingw32/4.6.0/collect2.exe -Bdynamic -o test.exe c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../../crt2.o c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/crtbegin.o -Lc:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0 -Lc:/snowfishroot/mingw/bin/../lib/gcc -Lc:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../../../mingw32/lib -Lc:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/../../.. test0.o test1.o -lstdc++ -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_s -lgcc -lmoldname -lmingwex -lmsvcrt c:/snowfishroot/mingw/bin/../lib/gcc/mingw32/4.6.0/crtend.o test1.o:test1.cpp:(.text+0x0): multiple definition of `non-virtual thunk to FooBase::Bar()' test0.o:test0.cpp:(.text+0x0): first defined here collect2: ld returned 1 exit status