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-rw-r--r--examples/OpenGL3-glut-test.cxx8
1 files changed, 6 insertions, 2 deletions
diff --git a/examples/OpenGL3-glut-test.cxx b/examples/OpenGL3-glut-test.cxx
index 75ff3b0d1..31639b545 100644
--- a/examples/OpenGL3-glut-test.cxx
+++ b/examples/OpenGL3-glut-test.cxx
@@ -1,7 +1,7 @@
//
// Tiny OpenGL v3 + glut demo program for the Fast Light Tool Kit (FLTK).
//
-// Copyright 1998-2021 by Bill Spitzak and others.
+// Copyright 1998-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
@@ -14,6 +14,7 @@
// https://www.fltk.org/bugs.php
//
+#include <FL/Fl.H> // includes <FL/fl_config.h>
#if defined(__APPLE__)
# define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED 1
# include <OpenGL/gl3.h> // defines OpenGL 3.0+ functions
@@ -198,7 +199,10 @@ int main (int argc, char* argv[])
glutCreateWindow("Triangle Test");
#ifndef __APPLE__
GLenum err = glewInit(); // defines pters to functions of OpenGL V 1.2 and above
- if (err) Fl::error("glewInit() failed returning %u", err);
+#ifdef FLTK_USE_WAYLAND
+ if (err == GLEW_ERROR_NO_GLX_DISPLAY) err = GLEW_OK;
+#endif
+ if (err != GLEW_OK) Fl::error("glewInit() failed returning %u", err);
fprintf(stderr, "Status: Using GLEW %s\n", glewGetString(GLEW_VERSION));
#endif
int gl_version_major;