--- CMakeLists.txt~	2019-09-26 14:18:04.000000000 -0500

+++ CMakeLists.txt	2019-09-26 14:18:34.476407791 -0500

@@ -581,9 +581,9 @@

 		message(SEND_ERROR "You have to enable OpenGL if you plan to use GLUT.")

 	endif(NOT MGL_HAVE_OPENGL)

 	include(FindGLUT)

-	if(NOT GLUT_FOUND)

-		message(SEND_ERROR "Couldn't find GLUT library.")

-	endif(NOT GLUT_FOUND)

+#	if(NOT GLUT_FOUND)

+#		message(SEND_ERROR "Couldn't find GLUT library.")

+#	endif(NOT GLUT_FOUND)

 else(enable-glut)

 	set(MGL_HAVE_GLUT 0)

 endif(enable-glut)

--- widgets/glut.cpp~	2019-07-08 13:56:57.000000000 -0500

+++ widgets/glut.cpp	2019-09-26 14:24:21.070662407 -0500

@@ -30,7 +30,7 @@

 		#include "glut.h"

 	#else

 		#include <GL/gl.h>

-		#include <GL/glut.h>

+		#include <GL/freeglut.h>

 	#endif

 #endif

--- widgets/CMakeLists.txt~	2019-07-08 13:56:57.000000000 -0500

+++ widgets/CMakeLists.txt	2019-09-26 14:28:13.770162047 -0500

@@ -14,10 +14,10 @@

 if(MGL_HAVE_GLUT)

 	mgl_add_lib(glut glut.cpp ../include/mgl2/glut.h)

-	target_include_directories(mgl-glut SYSTEM PUBLIC ${GLUT_INCLUDE_DIR})

-	target_include_directories(mgl-glut-static SYSTEM PUBLIC ${GLUT_INCLUDE_DIR})

-	target_link_libraries(mgl-glut mgl ${GLUT_LIBRARIES} ${OPENGL_LIBRARIES})

-	target_link_libraries(mgl-glut-static mgl-static ${GLUT_LIBRARIES} ${OPENGL_LIBRARIES})

+	target_include_directories(mgl-glut SYSTEM PUBLIC ${FreeGLUT_INCLUDE_DIR})

+	target_include_directories(mgl-glut-static SYSTEM PUBLIC ${FreeGLUT_INCLUDE_DIR})

+	target_link_libraries(mgl-glut mgl ${FreeGLUT_LIBRARIES} ${OPENGL_LIBRARIES} -lglut)

+	target_link_libraries(mgl-glut-static mgl-static ${FreeGLUT_LIBRARIES} ${OPENGL_LIBRARIES} -lglut)

 endif(MGL_HAVE_GLUT)

 if(MGL_HAVE_WX)