From ab5e53fb546243af90b3a4bdbe11ebac974ffabf Mon Sep 17 00:00:00 2001
From: Jeremy HU <huxingyi@msn.com>
Date: Tue, 9 Jul 2019 18:12:08 +0930
Subject: [PATCH] Fix build error on Raspberry PI 3 Model B+

---
 src/modelwidget.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/modelwidget.cpp b/src/modelwidget.cpp
index d6d431a9..b56d886c 100644
--- a/src/modelwidget.cpp
+++ b/src/modelwidget.cpp
@@ -144,7 +144,9 @@ void ModelWidget::paintGL()
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_CULL_FACE);
+#ifdef GL_LINE_SMOOTH
     glEnable(GL_LINE_SMOOTH);
+#endif
 
     m_world.setToIdentity();
     m_world.rotate(m_xRot / 16.0f, 1, 0, 0);