code/client/cl_main.c:27:10: fatal error: SDL_thread.h:No such file or directory

[Danil-Dm]

When I do openarena for android x86 or other architecture this error appears although there is an SDL2 folder in the usr / include / folder. I do it on ubuntu 19

code/client/cl_main.c:27:10: fatal error: SDL_thread.h:No such file or directory

I just want to change the openarena engine and not the entire application. Since when I run build.sh, the error ndk-build and when I specify the path to ndk in build.sh, other errors appear, there are a lot of them