From 8235967dcca61fe867be15bda07ef1ba8131a0e9 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 11 Jan 2023 09:32:31 +0100
Subject: Fix "Compilation warning: 'NSOpenGLContext' on macOS 11" !#646)

---
 FL/gl.h  | 1 +
 FL/mac.H | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/FL/gl.h b/FL/gl.h
index 10eb05e05..e47c66e3c 100644
--- a/FL/gl.h
+++ b/FL/gl.h
@@ -55,6 +55,7 @@
 #  endif
 
 #  ifdef __APPLE__ // PORTME: OpenGL path abstraction
+#  define GL_SILENCE_DEPRECATION 1
 #    if !defined(__gl3_h_) // make sure OpenGL/gl3.h was not included before
 #      include <OpenGL/gl.h>
 #    endif
diff --git a/FL/mac.H b/FL/mac.H
index 015b9ddda..f356730ca 100644
--- a/FL/mac.H
+++ b/FL/mac.H
@@ -25,6 +25,9 @@
 
 #ifdef __OBJC__
   @class NSOpenGLContext;
+#  ifndef GL_SILENCE_DEPRECATION
+#    define GL_SILENCE_DEPRECATION 1
+#  endif
 #elif defined(__cplusplus)
   class NSOpenGLContext;
 #endif /* __OBJC__ */
-- 
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