compile sdl2 with enable wayland will get error, show below:

/bin/bash: /usr/bin/wayland-scanner: No such file or directory
/bin/bash: /usr/bin/wayland-scanner: No such file or directory
  GEN    gen/pointer-constraints-unstable-v1-protocol.c
/bin/bash: /usr/bin/wayland-scanner: No such file or directory
  CC     build/SDL_waylandevents.lo
/bin/bash: /usr/bin/wayland-scanner: No such file or directory
  GEN    gen/relative-pointer-unstable-v1-protocol.c
/bin/bash: /usr/bin/wayland-scanner: No such file or directory
Makefile:674: recipe for target 'gen/wayland-client-protocol.h' failed
make[2]: *** [gen/wayland-client-protocol.h] Error 127
make[2]: *** Waiting for unfinished jobs....
Makefile:681: recipe for target 'gen/relative-pointer-unstable-v1-client-protocol.h' failed
make[2]: *** [gen/relative-pointer-unstable-v1-client-protocol.h] Error 127
Makefile:670: recipe for target 'gen/wayland-protocol.c' failed
make[2]: *** [gen/wayland-protocol.c] Error 127
Makefile:693: recipe for target 'gen/pointer-constraints-unstable-v1-protocol.c' failed
make[2]: *** [gen/pointer-constraints-unstable-v1-protocol.c] Error 127
Makefile:685: recipe for target 'gen/pointer-constraints-unstable-v1-client-protocol.h' failed
make[2]: *** [gen/pointer-constraints-unstable-v1-client-protocol.h] Error 127
/bin/bash: /usr/bin/wayland-scanner: No such file or directory
Makefile:689: recipe for target 'gen/relative-pointer-unstable-v1-protocol.c' failed
make[2]: *** [gen/relative-pointer-unstable-v1-protocol.c] Error 127
/home/wh/3399/buildroot/output/rockchip_rk3399/build/sdl2-2.0.7/src/video/wayland/SDL_waylandevents.c:41:61: fatal error: pointer-constraints-unstable-v1-client-protocol.h: No such file or directory
 #include "pointer-constraints-unstable-v1-client-protocol.h"
                                                             ^
compilation terminated.
Makefile:563: recipe for target 'build/SDL_waylandevents.lo' failed
make[2]: *** [build/SDL_waylandevents.lo] Error 1
package/pkg-generic.mk:247: recipe for target '/home/wh/3399/buildroot/output/rockchip_rk3399/build/sdl2-2.0.7/.stamp_built' failed
make[1]: *** [/home/wh/3399/buildroot/output/rockchip_rk3399/build/sdl2-2.0.7/.stamp_built] Error 2
Makefile:16: recipe for target '_all' failed
make: *** [_all] Error 2