In file included from /wrkdirs/usr/ports/textproc/lttoolbox/work/lttoolbox-3.8.0/lttoolbox/acx.cc:17:
In file included from /wrkdirs/usr/ports/textproc/lttoolbox/work/lttoolbox-3.8.0/lttoolbox/acx.h:20:
In file included from /wrkdirs/usr/ports/textproc/lttoolbox/work/lttoolbox-3.8.0/lttoolbox/sorted_vector.hpp:25:
In file included from /usr/include/c++/v1/iterator:698:
/usr/include/c++/v1/__iterator/ostream_iterator.h:62:20: error: invalid operands to binary expression ('ostream_type' (aka 'basic_ostream<char, std::char_traits<char>>') and 'const char')
   62 |     *__out_stream_ << __value;
      |     ~~~~~~~~~~~~~~ ^  ~~~~~~~
/usr/local/include/utf8cpp/utf8/core.h:358:25: note: in instantiation of member function 'std::ostream_iterator<char>::operator=' requested here
  358 |             *(result++) = static_cast<octet_type>(cp);
      |                         ^
/usr/local/include/utf8cpp/utf8/core.h:398:16: note: in instantiation of function template specialization 'utf8::internal::append<std::ostream_iterator<char>, char8_t>' requested here
  398 |         return append<octet_iterator, utfchar8_t>(cp, result);
      |                ^
/usr/local/include/utf8cpp/utf8/checked.h:79:26: note: in instantiation of function template specialization 'utf8::internal::append<std::ostream_iterator<char>>' requested here
   79 |         return internal::append(cp, result);
      |                          ^
/usr/local/include/utf8cpp/utf8/checked.h:248:28: note: in instantiation of function template specialization 'utf8::append<std::ostream_iterator<char>>' requested here
  248 |             result = utf8::append(cp, result);
      |                            ^
/wrkdirs/usr/ports/textproc/lttoolbox/work/lttoolbox-3.8.0/lttoolbox/ustring.h:44:9: note: in instantiation of function template specialization 'utf8::utf16to8<char16_t *, std::ostream_iterator<char>>' requested here
   44 |   utf8::utf16to8(&c, &c+1, std::ostream_iterator<char>(ostr));
      |         ^