How do you supress OpenGL messages in Xcode for iOS 12.0

I'm using an old version of Cocos2d-iphone and need to come up with one last release before I completely reconfigure my app for Metal support. Until then, I'm trying to work through all the deprecated issues besides the OpenGL stuff. As it is, I have well over 400+ messages that say

"_____ is deprecated: first deprecated in iOS 12.0 - OpenGLES API deprecated. (Define GLES_SILENCE_DEPRECATION to silence these warnings)_

Where do I define this in my project? I tried putting it in the top of my global.h header as well as a few other places, but I can't seem to get rid of it.

Solution

Define it under Preprocessor Macros in Build Settings: