http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51832
--- Comment #5 from Markus Trippelsdorf <markus at trippelsdorf dot de> 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<std::allocator<int> >::__construct_helper<int, > 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<std::allocator<int> >::__construct_helper<int, int>::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
