error: function declaration isn’t a prototype [-Werror=strict-prototypes]

"warning: function declaration isn't a prototype" was caused by the function like that:

 

return_type XXX()

{

.......

}

 

Please just modify the input paramter to void.return_type XXX(void)

{

.......

}

Or turn off the warning with -Wno-strict-prototypes (or simply by omitting -Wstrict-prototypes).