$ cmake .. 
CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The C compiler identification is GNU 12.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at CMakeLists.txt:28 (find_package):
  Found package configuration file:

    /usr/lib64/cmake/SDL2/SDL2Config.cmake

  but it set SDL2_FOUND to FALSE so package "SDL2" is considered to be NOT
  FOUND.

find_package(SDL2 REQUIRED sdl2)

find_package(SDL2 REQUIRED)