Can't load '/opt/local/lib/perl5/site_perl/5.8.8/darwin-2level/auto/Device/SerialPort/SerialPort.bundle' for module Device::SerialPort: dlopen(/opt/local/lib/perl5/site_perl/5.8.8/darwin-2level/auto/Device/SerialPort/SerialPort.bundle, 1): Symbol not found: _PL_stack_base
  Referenced from: /opt/local/lib/perl5/site_perl/5.8.8/darwin-2level/auto/Device/SerialPort/SerialPort.bundle
  Expected in: dynamic lookup
 at /opt/local/lib/perl5/site_perl/5.8.8/darwin-2level/Device/SerialPort.pm line 62
Compilation failed in require at ./water.pl line 9.