Snippets for log4cplus 2.2.0.1 from Nix aarch64-darwin

Sourced from https://hydra.nixos.org/log/6j2s646923dd8w5b797rcgyd2762vag0-log4cplus-2.2.0.1.drv.

src/fileappender.cxx:690:1: warning: unused function 'local_time_offset' [-Wunused-function]
  690 | local_time_offset (Time const & t)
      | ^~~~~~~~~~~~~~~~~

src/fileappender.cxx:706:1: warning: unused function 'adjust_for_time_zone' [-Wunused-function]
  706 | adjust_for_time_zone (Time const & t, std::chrono::seconds const & tzoffset)
      | ^~~~~~~~~~~~~~~~~~~~

./threadpool/ThreadPool.h:262:68: warning: unused parameter 'lock' [-Wunused-parameter]
  262 |     std::size_t worker_number, std::unique_lock<std::mutex> const &lock)
      |                                                                    ^

src/lockfile.cxx:337:9: warning: unused variable 'ret' [-Wunused-variable]
  337 |     int ret = 0;
      |         ^~~

src/property.cxx:140:35: warning: unused parameter 'file' [-Wunused-parameter]
  140 | imbue_file_from_flags (tistream & file, unsigned flags)
      |                                   ^

src/snprintf.cxx:55:12: warning: unused variable 'NULL_FILE' [-Wunused-const-variable]
   55 | char const NULL_FILE[] = "/dev/null";
      |            ^~~~~~~~~

src/syslogappender.cxx:262:16: warning: moving a temporary object prevents copy elision [-Wpessimizing-move]
  262 |     hostname = std::move(helpers::getHostname (fqdn));
      |                ^

src/timehelper.cxx:61:11: warning: unused variable 'ONE_SEC_IN_USEC' [-Wunused-const-variable]
   61 | const int ONE_SEC_IN_USEC = 1000000;
      |           ^~~~~~~~~~~~~~~

tests/unit_tests/unit_tests.cxx:4:11: warning: unused parameter 'argc' [-Wunused-parameter]
    4 | main (int argc, char* argv[])
      |           ^

tests/unit_tests/unit_tests.cxx:4:23: warning: unused parameter 'argv' [-Wunused-parameter]
    4 | main (int argc, char* argv[])
      |                       ^