Added Mac OpenGL ES configure support

configure.in

@@ -2462,6 +2462,19 @@ CheckMacGL()
     fi
 }
 
+dnl Check for MacOS OpenGLES
+CheckMacGLES()
+{
+    if test x$enable_video = xyes -a x$enable_video_opengles = xyes; then
+        video_opengl_egl=yes
+        AC_DEFINE(SDL_VIDEO_OPENGL_EGL, 1, [ ])
+        video_opengles_v2=yes
+        AC_DEFINE(SDL_VIDEO_OPENGL_ES2, 1, [ ])
+        AC_DEFINE(SDL_VIDEO_RENDER_OGL_ES2, 1, [ ])
+        SUMMARY_video="${SUMMARY_video} opengl_es2"
+    fi
+}
+
 CheckEmscriptenGLES()
 {
     if test x$enable_video = xyes -a x$enable_video_opengles = xyes; then
@@ -3773,6 +3786,7 @@ AC_HELP_STRING([--enable-render-d3d], [enable the Direct3D render driver [[defau
         CheckMETAL
         CheckX11
         CheckMacGL
+        CheckMacGLES
         CheckOpenGLX11
         CheckVulkan
         CheckPTHREAD