Functions Declared Without a Return Type Are Not Supported - Functions Declared Without a Return Type Are Not Supported Description The C2H compiler does not support functions without an explicitly declared return type. Resolution If you are using the implicit int return type, declare the return type explicitly. If your function has no return value, declare it as void . Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']