Build issue

[tillea]

Hi,
I tried to build this code on Debian unstable and got:

In file included from /usr/include/c++/9/memory:80,
                 from src/create_k_unitigs_large_k.cc:23:
/usr/include/c++/9/bits/unique_ptr.h:53:28: note: declared here
   53 |   template<typename> class auto_ptr;
      |                            ^~~~~~~~
src/create_k_unitigs_large_k.cc:352:8: error: ‘template<class> class std::auto_ptr’ is deprecated [-Werror=deprecated-declarations]
  352 |   std::auto_ptr<jellyfish::mapped_file> dbf;
      |        ^~~~~~~~
In file included from /usr/include/c++/9/memory:80,
                 from src/create_k_unitigs_large_k.cc:23:
/usr/include/c++/9/bits/unique_ptr.h:53:28: note: declared here
   53 |   template<typename> class auto_ptr;
      |                            ^~~~~~~~
src/create_k_unitigs_large_k.cc:383:10: error: ‘template<class> class std::auto_ptr’ is deprecated [-Werror=deprecated-declarations]
  383 |     std::auto_ptr<std::ostream> output_ostream(open_output());
      |          ^~~~~~~~
In file included from /usr/include/c++/9/memory:80,
                 from src/create_k_unitigs_large_k.cc:23:
/usr/include/c++/9/bits/unique_ptr.h:53:28: note: declared here
   53 |   template<typename> class auto_ptr;
      |                            ^~~~~~~~

Any hint what to do?
Kind regards, Andreas.