https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112596
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Veeraraghavan Sekar from comment #2) > You have common reason on what cause > > _Unwind_Resume and _Unwind_RaiseException_Phase2? I don't understand the question. Those functions are used for exception handling. > Does D_GLIBCXX_USE_CXX11_ABI flag will have impact? No, I don't think so, that doesn't affect std::regex.