Don't generate dozens of deprecation warnings (one for each OpenGL function used in the code) for any program using wxGLCanvas being built using macOS 10.14 or later SDK. Closes https://github.com/wxWidgets/wxWidgets/pull/1875
Don't generate dozens of deprecation warnings (one for each OpenGL function used in the code) for any program using wxGLCanvas being built using macOS 10.14 or later SDK. Closes https://github.com/wxWidgets/wxWidgets/pull/1875