Make project compile on macOS as well as Linux

CMakeLists.txt

@@ -6,6 +6,8 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_VERBOSE_MAKEFILE ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules)
 
+find_package(OpenGL REQUIRED)
+find_package(GLUT REQUIRED)
 find_package(OpenCV HINTS /usr/local/opt/opencv /usr/local/Cellar/opencv REQUIRED)
 
 set( NAME_SRC
@@ -15,4 +17,11 @@ set( NAME_SRC
 set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
 add_executable( opengl_opencv_example ${NAME_SRC} ${NAME_HEADERS} )
 
+
+
+if (APPLE)
+    # Equivalent to pass flags -framework OpenGL 
+    target_link_libraries(opengl_opencv_example OpenGL::GL GLUT::GLUT ${OpenCV_LIBS})
+else()
     target_link_libraries(opengl_opencv_example GL GLU glut ${OpenCV_LIBS} )
+endif()

main.cpp

@@ -6,8 +6,14 @@
  
 #include <iostream>
 
+#ifdef __APPLE__
+    #include <OpenGL/gl.h>
+    #include <OpenGL/gl3.h>
+    #include <GLUT/glut.h>
+#else
     #include <GL/glew.h>
     #include <GL/glut.h>
+#endif
 
 using namespace cv;
 using namespace std;