From a98d3a6569d94ff59d8e20094b0695701b9217b6 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Tue, 23 Apr 2019 18:17:16 +0200
Subject: Use HAVE_GLXGETPROCADDRESSARB preprocessor variable

---
 src/Fl_Gl_Choice.cxx | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/Fl_Gl_Choice.cxx b/src/Fl_Gl_Choice.cxx
index 77722dc2d..d71156ac9 100644
--- a/src/Fl_Gl_Choice.cxx
+++ b/src/Fl_Gl_Choice.cxx
@@ -418,7 +418,11 @@ GLContext Fl_X11_Gl_Window_Driver::create_gl_context(Fl_Window* window, const Fl
   typedef GLContext (*glXCreateContextAttribsARBProc)(Display*, GLXFBConfig, GLContext, Bool, const int*);
   // It is not necessary to create or make current to a context before calling glXGetProcAddressARB
   static glXCreateContextAttribsARBProc glXCreateContextAttribsARB =
+#if defined(HAVE_GLXGETPROCADDRESSARB)
     (glXCreateContextAttribsARBProc)glXGetProcAddressARB((const GLubyte *)"glXCreateContextAttribsARB");
+#else
+  NULL;
+#endif
   
   GLContext ctx = 0;
   // Check for the GLX_ARB_create_context extension string and the function.
-- 
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