On 10 May 2016 at 22:27, Gert Wollny <[email protected]> wrote: > Package: libboost-regex1.58.0 > Version: 1.58.0+dfsg-5+b1 > Severity: important > > Dear maintainer, > > when compiling src:mrs with g++-6 I get unresolved symbols > > /usr/bin/c++ -o mrs -I. obj/M6Server.o [...] -lboost_regex [...] > > obj/M6Server.o: In function > `boost::cpp_regex_traits<char>::transform_primary[abi:cxx11](char const*, char > const*) const': > /usr/include/boost/regex/v4/cpp_regex_traits.hpp:965: undefined reference to > `boost::re_detail::cpp_regex_traits_implementation<char>::transform_primary[abi:cxx11](char > const*, char const*) const' > obj/M6Server.o: In function > `boost::cpp_regex_traits<char>::transform[abi:cxx11](char const*, char const*) > const': > /usr/include/boost/regex/v4/cpp_regex_traits.hpp:961: undefined reference to > `boost::re_detail::cpp_regex_traits_implementation<char>::transform[abi:cxx11](char > const*, char const*) const' > ... > > now in the symbol table I get > objdump --dynamic-syms libboost_regex.so.1.58.0 \ > | c++filt \ > | sed -e "s/^[0-9a-f]* *\([A-Za-z]\) *D[A-Z] \.[a-z]*/\1/" \ > | sed -e "s/[0-9a-f]* Base *//" | grep "transform_primary" > > g boost::c_regex_traits<wchar_t>::transform_primary[abi:cxx11](wchar_t const*, > wchar_t const*) > w > boost::re_detail::cpp_regex_traits_implementation<wchar_t>::transform_primary(wchar_t > const*, wchar_t const*) const > w > boost::re_detail::cpp_regex_traits_implementation<char>::transform_primary(char > const*, char const*) const > g boost::c_regex_traits<char>::transform_primary[abi:cxx11](char const*, char > const*) > > i.e. the symbols are not available. > > Given > http://www.boost.org/doc/libs/1_58_0/libs/regex/doc/html/boost_regex/ref/regex_traits.html > > I thought compiling with -DBOOST_REGEX_USE_C_LOCALE would get me somewhere, > but > then I get a lot more missing symbols, and they are all without the > [abi:cxx11] > tag. > > > src:mrs requires -std=c++11, but I assume for the boost package the g++ > default > was used, and with g++-5 this is -std=c++03, therefore, final guess is that > there is a problem with compiling boost with -std=c++11 and then linking > against a boost library that was compiled with -std=c++03. >
g++-5 defaults are "funny" - it's using c++11 ABI for libstdc++ yet 98 standards for the code. With gcc++-6 everything is bumped - "The default mode for C++ is now -std=gnu++14 instead of -std=gnu++98." With gcc++-6 i think we will need to compile boost with gcc++-6 and then recompile the world with against the new libraries. Have you tried that? Regards, Dimitri. > > Best, > Gert > > > > -- System Information: > Debian Release: stretch/sid > APT prefers unstable-debug > APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), > (1, 'experimental') > Architecture: amd64 (x86_64) > Foreign Architectures: i386 > > Kernel: Linux 4.5.0-2-amd64 (SMP w/2 CPU cores) > Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) > > Versions of packages libboost-regex1.58.0 depends on: > ii libc6 2.22-7 > ii libgcc1 1:6-20160117-1 > ii libicu55 55.1-7 > ii libstdc++6 6-20160117-1 > > libboost-regex1.58.0 recommends no packages. > > libboost-regex1.58.0 suggests no packages. > > -- no debconf information > > _______________________________________________ > pkg-boost-devel mailing list > [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-boost-devel -- Regards, Dimitri.
