| ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:973:13: error: no previous prototype for function 'timestamp' [-Werror,-Wmissing-prototypes]
  973 | char const* timestamp()
      |             ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:973:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
  973 | char const* timestamp()
      | ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:987:6: error: no previous prototype for function 'print_alert' [-Werror,-Wmissing-prototypes]
  987 | void print_alert(lt::alert const* a, std::string& str)
      |      ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:987:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
  987 | void print_alert(lt::alert const* a, std::string& str)
      | ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1044:33: error: implicit conversion changes signedness: 'const int' to 'size_t' (aka 'unsigned long') [-Werror,-Wsign-conversion]
 1040 |                         cache_manager->cache_piece_data(
      |                                        ~~~~~~~~~~~~~~~~
 1041 |                             ih,
 1042 |                             rp->piece,
 1043 |                             rp->buffer.get(),
 1044 |                             rp->size
      |                             ~~~~^~~~
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1391:6: error: no previous prototype for function 'print_compact_piece' [-Werror,-Wmissing-prototypes]
 1391 | void print_compact_piece(lt::partial_piece_info const& pp, std::string& out)
      |      ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1391:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
 1391 | void print_compact_piece(lt::partial_piece_info const& pp, std::string& out)
      | ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1411:6: error: no previous prototype for function 'print_piece' [-Werror,-Wmissing-prototypes]
 1411 | void print_piece(lt::partial_piece_info const& pp
      |      ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1411:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
 1411 | void print_piece(lt::partial_piece_info const& pp
      | ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1468:6: error: no previous prototype for function 'is_resume_file' [-Werror,-Wmissing-prototypes]
 1468 | bool is_resume_file(std::string const& s)
      |      ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1468:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
 1468 | bool is_resume_file(std::string const& s)
      | ^
      | static 
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1480:6: error: no previous prototype for function 'print_usage' [-Werror,-Wmissing-prototypes]
 1480 | void print_usage()
      |      ^
/tmp/cirrus-ci-build/examples/client_test_piece_cache.cpp:1480:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
 1480 | void print_usage()
      | ^
      | static 
8 errors generated.
[199/427] Building CXX object examples/CMakeFiles/client_test_piece_cache.dir/torrent_view.cpp.o
[200/427] Building CXX object examples/CMakeFiles/client_test_piece_cache.dir/session_view.cpp.o
ninja: build stopped: subcommand failed.