Process completed with exit code 1.

call to undeclared function 'register_syscore_ops'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

incompatible function pointer types initializing 'void (*)(void *)' with an expression of type 'void (void)' [-Wincompatible-function-pointer-types]

incompatible function pointer types initializing 'int (*)(void *)' with an expression of type 'int (void)' [-Wincompatible-function-pointer-types]