https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103186
Bug ID: 103186 Summary: redefinition of template symbol error with strange error diagnostic Product: gcc Version: 11.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: dl.soluz at gmx dot net Target Milestone: --- Created attachment 51764 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51764&action=edit test source How to reproduce use the attached test.cpp - i reduced it as much as possible while keeping the error(s) intact good case - problematik parts are disabled: gcc -Wall -Wextra -std=c++17 test.cpp test 1: (https://gcc.godbolt.org/z/WvqbWq1e5) gcc -Wall -Wextra -std=c++17 test.cpp -DTEST=1 est.cpp:77:12: error: redefinition of ‘const char _ZTSZN12GetSetHelperIaE3setESt8functionIFvvEEEd_UlDpOT_E_ []’ 77 | int main(){} | ^ test.cpp:77:12: note: ‘const char _ZTSZN12GetSetHelperIaE3setESt8functionIFvvEEEd_UlDpOT_E_ [54]’ previously defined here test 2: gcc -Wall -Wextra -std=c++17 test.cpp -DTEST=2 /usr/bin/ld: /tmp/ccCdRNNd.o:(.data.rel.ro._ZTIZN12GetSetHelperIhE3setESt8functionIFvvEEEd_UlDpOT_E_[_ZTIZN12GetSetHelperIhE3setESt8functionIFvvEEEd_UlDpOT_E_]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /usr/bin/ld: /tmp/ccCdRNNd.o:(.data.rel.ro._ZTIZN12GetSetHelperIaE3setESt8functionIFvvEEEd_UlDpOT_E_[_ZTIZN12GetSetHelperIaE3setESt8functionIFvvEEEd_UlDpOT_E_]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info' /usr/bin/ld: /tmp/ccCdRNNd.o:(.data.rel.local.DW.ref.__gxx_personality_v0[DW.ref.__gxx_personality_v0]+0x0): undefined reference to `__gxx_personality_v0' collect2: error: ld returned 1 exit status this linker problem does not occure on gcc.godbolt - maybe a Ubuntu ld only problem Test with other versions, compilers: error occures also with gcc.godbolt trunk/11.2/11.1, does not happen with gcc 10.3 or lower does not happen with Clang versions down to 8.x and further does not happen with VS2017/2019(up to date versions) System: using up-to-date(11.11.2021) Ubuntu 21.10 x64 with default gcc 11.2.0, clang 13.x and default ld 2.37 $ uname -a Linux linux 5.13.0-20-generic #20-Ubuntu SMP Fri Oct 15 14:21:35 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.2.0-7ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-ZPT0kp/gcc-11-11.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-ZPT0kp/gcc-11-11.2.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 11.2.0 (Ubuntu 11.2.0-7ubuntu2) $ ld -v GNU ld (GNU Binutils for Ubuntu) 2.37