src/NetworkSettings.cpp: In member function 'void NetworkSettingsClass::setHostname()':
src/NetworkSettings.cpp:254:42: error: no matching function for call to 'ETHClass::setHostname(String)'
if (ETH.setHostname(getHostname())) {
^
ETH.h:83:14: note: candidate: 'bool ETHClass::setHostname(const char*)'
bool setHostname(const char * hostname);