From e16a3250060cacc6cd8562c7fb21ba382643a170 Mon Sep 17 00:00:00 2001
From: Stephen Birarda <commit@birarda.com>
Date: Mon, 3 Mar 2014 16:36:37 -0800
Subject: [PATCH] optionally do not reference OPENGL_INCLUDE_DIR for win

---
 interface/CMakeLists.txt  | 6 +++++-
 svo-viewer/CMakeLists.txt | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index d923404c60..646ad3c167 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -231,7 +231,11 @@ if (APPLE)
 else (APPLE)
     find_package(OpenGL REQUIRED)
     find_package(GLUT REQUIRED)
-    include_directories(${GLUT_INCLUDE_DIR} "${OPENGL_INCLUDE_DIR}")
+    
+    if (OPENGL_INCLUDE_DIR)
+      include_directories("${GLUT_INCLUDE_DIR}" "${OPENGL_INCLUDE_DIR}")
+    endif (OPENGL_INCLUDE_DIR)
+    
     target_link_libraries(${TARGET_NAME} "${OPENGL_LIBRARY}")
 endif (APPLE)
 
diff --git a/svo-viewer/CMakeLists.txt b/svo-viewer/CMakeLists.txt
index b74612d3eb..c76cc4209b 100644
--- a/svo-viewer/CMakeLists.txt
+++ b/svo-viewer/CMakeLists.txt
@@ -162,7 +162,11 @@ if (APPLE)
 else (APPLE)
     find_package(OpenGL REQUIRED)
     find_package(GLUT REQUIRED)
-    include_directories("${GLUT_INCLUDE_DIR}" "${OPENGL_INCLUDE_DIR}")
+    
+    if (OPENGL_INCLUDE_DIR)
+      include_directories("${GLUT_INCLUDE_DIR}" "${OPENGL_INCLUDE_DIR}")
+    endif (OPENGL_INCLUDE_DIR)
+    
     target_link_libraries(${TARGET_NAME} "${OPENGL_LIBRARY}")
 endif (APPLE)