cmake HAVE_VIDEO_OPENGLES_V1 examples

FilmKilns/FilmKilns src/sdl2/cmake/sdlchecks.cmake :810 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

inolen/redream deps/sdl2/cmake/sdlchecks.cmake :798 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

google/filament third_party/libsdl2/cmake/sdlchecks.cmake :830 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

nvMcJohn/apitest thirdparty/SDL2-2.0.1/cmake/sdlchecks.cmake :578 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

nvMcJohn/apitest thirdparty/SDL2-2.0.1/cmake/sdlchecks.cmake :586 

endif(HAVE_VIDEO_OPENGLES_V1)

crossuo/crossuo deps/sdl-2.0.10-c1be3add38/cmake/sdlchecks.cmake :770 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

AtomicGameEngine/AtomicGameEngine Source/ThirdParty/SDL/cmake/sdlchecks.cmake :807 

check_c_source_compiles("
      #include <GLES/gl.h>
      #include <GLES/glext.h>
      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)