cmake HAVE_VIDEO_OPENGLES_V2 examples

FilmKilns/FilmKilns src/sdl2/cmake/sdlchecks.cmake :819 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

inolen/redream deps/sdl2/cmake/sdlchecks.cmake :807 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

google/filament third_party/libsdl2/cmake/sdlchecks.cmake :839 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

nvMcJohn/apitest thirdparty/SDL2-2.0.1/cmake/sdlchecks.cmake :587 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

nvMcJohn/apitest thirdparty/SDL2-2.0.1/cmake/sdlchecks.cmake :595 

endif(HAVE_VIDEO_OPENGLES_V2)

crossuo/crossuo deps/sdl-2.0.10-c1be3add38/cmake/sdlchecks.cmake :779 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

AtomicGameEngine/AtomicGameEngine Source/ThirdParty/SDL/cmake/sdlchecks.cmake :816 

check_c_source_compiles("
      #include <GLES2/gl2.h>
      #include <GLES2/gl2ext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)