In file included from /tmp/arduino_modified_sketch_771435/NTSCserialTerm.pde:2:0:
/home/ric/Arduino/libraries/arduino-tvout/pollserial/pollserial.h:46:16: error: conflicting return type specified for 'virtual void pollserial::write(uint8_t)'
virtual void write(uint8_t);
^
In file included from /home/ric/.arduino15/packages/arduino/hardware/avr/1.6.19/cores/arduino/Stream.h:26:0,
from /home/ric/.arduino15/packages/arduino/hardware/avr/1.6.19/cores/arduino/HardwareSerial.h:29,
from /home/ric/.arduino15/packages/arduino/hardware/avr/1.6.19/cores/arduino/Arduino.h:232,
from sketch/NTSCserialTerm.pde.cpp:1:
/home/ric/.arduino15/packages/arduino/hardware/avr/1.6.19/cores/arduino/Print.h:51:20: error: overriding 'virtual size_t Print::write(uint8_t)'
virtual size_t write(uint8_t) = 0;
^
exit status 1
Error compiling for board Arduino/Genuino Mega or Mega 2560.