It's not really an error but "now", auto_ptr are deprecated

/home/schroeterm/devel/unigw-master/wpkg/libdebpackages/memfile.cpp: In member function void memfile::memory_file::read_file(const wpkg_filename::uri_filename&, memfile::memory_file::file_info*):
/home/schroeterm/devel/unigw-master/wpkg/libdebpackages/memfile.cpp:1479:14: error: template<class> class std::auto_ptr is deprecated [-Werror=deprecated-declarations]
         std::auto_ptr<tcp_client_server::tcp_client> http_client;
              ^
In file included from /usr/include/c++/5/memory:81:0,
                 from /home/schroeterm/devel/unigw-master/wpkg/libdebpackages/../libdebpackages/wpkg_filename.h:38,
                 from /home/schroeterm/devel/unigw-master/wpkg/libdebpackages/../libdebpackages/memfile.h:32,
                 from /home/schroeterm/devel/unigw-master/wpkg/libdebpackages/memfile.cpp:45:
/usr/include/c++/5/bits/unique_ptr.h:49:28: note: declared here
   template<typename> class auto_ptr;
                            ^
cc1plus: all warnings being treated as errors
make[5]: *** [libdebpackages/CMakeFiles/debpackages_static.dir/memfile.cpp.o] Erreur 1
make[4]: *** [libdebpackages/CMakeFiles/debpackages_static.dir/all] Erreur 2
make[3]: *** [all] Erreur 2