PHP Fatal error:  Uncaught FFI\Exception: Failed resolving C function 'SDL_RegisterApp' in /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php:89
Stack trace:
#0 /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php(89): FFI::cdef()
#1 /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php(99): Serafim\FFILoader\Library->Serafim\FFILoader\{closure}()
#2 /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php(90): Serafim\FFILoader\Library->memoized()
#3 /home/jav/Downloads/SDL-master/src/SDL.php(42): Serafim\FFILoader\Library->get()
#4 /home/jav/Downloads/SDL-master/hello.php(36): Serafim\SDL\SDL->__construct()
#5 {main}

Next FFI\Exception: Failed resolving C function 'SDL_UnregisterApp' in /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php:89
Stack trace:
#0 /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php(89): FFI::cdef()
#1 /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php(99): Ser in /home/jav/Downloads/SDL-master/vendor/serafim/ffi-loader/src/Library.php on line 89