Created attachment 475202 [details] ebuild log file media-video/mkvtoolnix-12.0.0 ebuild fails with linker errors. That look something like this: collect2: error: ld returned 1 exit status src/merge/mkvmerge.o: In function `__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > boost::re_detail_106300::re_is_set_member<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> >, unsigned int>(__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::re_detail_106300::re_set_long<unsigned int> const*, boost::re_detail_106300::regex_data<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, bool)': mkvmerge.cpp:(.text._ZN5boost16re_detail_10630016re_is_set_memberIN9__gnu_cxx17__normal_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEjEET_SH_SH_PKNS0_11re_set_longIT2_EERKNS0_10regex_dataIT0_T1_EEb[_ZN5boost16re_detail_10630016re_is_set_memberIN9__gnu_cxx17__normal_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEjEET_SH_SH_PKNS0_11re_set_longIT2_EERKNS0_10regex_dataIT0_T1_EEb]+0x1f3): undefined reference to `boost::re_detail_106300::cpp_regex_traits_implementation<char>::transform_primary[abi:cxx11](char const*, char const*) const' mkvmerge.cpp:(.text._ZN5boost16re_detail_10630016re_is_set_memberIN9__gnu_cxx17__normal_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEjEET_SH_SH_PKNS0_11re_set_longIT2_EERKNS0_10regex_dataIT0_T1_EEb[_ZN5boost16re_detail_10630016re_is_set_memberIN9__gnu_cxx17__normal_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEjEET_SH_SH_PKNS0_11re_set_longIT2_EERKNS0_10regex_dataIT0_T1_EEb]+0x35a): undefined reference to `boost::re_detail_106300::cpp_regex_traits_implementation<char>::transform[abi:cxx11](char const*, char const*) const' Logs attached.
Created attachment 475204 [details] output of emerge --info media-video/mkvtoolnix-12.0.0
Does it help to rebuild boost?
Yes. Looks like a rebuild of boost followed by an upgrade of mkvtoolnix completes successfully.
