--- OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiViewer/Makefile.orig	2012-01-04 12:35:46.000000000 +0100
+++ OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiViewer/Makefile	2012-01-22 19:00:47.774268787 +0100
@@ -11,7 +11,7 @@
 ifeq ("$(OSTYPE)","Darwin")
 	LDFLAGS += -framework OpenGL -framework GLUT
 else
-	USED_LIBS += glut
+	USED_LIBS += glut GL
 endif
 
 USED_LIBS += OpenNI
--- OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiSimpleViewer/Makefile.orig	2012-01-04 12:35:46.000000000 +0100
+++ OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiSimpleViewer/Makefile	2012-01-22 19:11:47.600957548 +0100
@@ -11,7 +11,7 @@
 ifeq ("$(OSTYPE)","Darwin")
 	LDFLAGS += -framework OpenGL -framework GLUT
 else
-	USED_LIBS += glut
+	USED_LIBS += glut GL
 endif
 
 USED_LIBS += OpenNI
--- OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiUserTracker/Makefile.orig	2012-01-04 12:35:46.000000000 +0100
+++ OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiUserTracker/Makefile	2012-01-22 19:26:00.357652766 +0100
@@ -12,7 +12,7 @@
 	ifeq ("$(OSTYPE)","Darwin")
 		LDFLAGS += -framework OpenGL -framework GLUT
 	else
-		USED_LIBS += glut
+		USED_LIBS += glut GL
 	endif
 else
 	ifeq "$(GLES_SUPPORTED)" "1"
--- OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiUserSelection/Makefile.orig	2012-01-04 12:35:46.000000000 +0100
+++ OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiUserSelection/Makefile	2012-01-22 19:38:42.454344951 +0100
@@ -12,7 +12,7 @@
 	ifeq ("$(OSTYPE)","Darwin")
 		LDFLAGS += -framework OpenGL -framework GLUT
 	else
-		USED_LIBS += glut
+		USED_LIBS += glut GL
 	endif
 else
 	ifeq "$(GLES_SUPPORTED)" "1"
--- OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiHandTracker/Makefile.orig	2012-01-04 12:35:46.000000000 +0100
+++ OpenNI-OpenNI-1516074/Platform/Linux/Build/Samples/NiHandTracker/Makefile	2012-01-22 19:44:53.017690692 +0100
@@ -11,7 +11,7 @@
 ifeq ("$(OSTYPE)","Darwin")
 	LDFLAGS += -framework OpenGL -framework GLUT
 else
-	USED_LIBS += glut
+	USED_LIBS += glut GL
 endif
 
 USED_LIBS += OpenNI