window remains black until I drag it

[qzlinqian]

After I updated the xcode command line tool, some warning disappeared but -lglfw was failed to link. I changed the CMakeLists and that worked, but the created window would only show the intended content after I drag it. What is going on with that?

[qzlinqian]

I added a line glfwSetWindowPos(window, 100, 100); in the main loop to set the window position and the content did show (I think resize the window also works). Many ones with Mojave + Xcode10 also came across this issue.
But this is only a temporary solution. That's really disturbing.... Is there any better solution?

[qzlinqian]

It was really painful to adjust between different versions... In PhysicsEngine, the created window also shows nothing and it even cannot be resized; moving it also doesn't work. I can only see the content after minimizing and reopening it. (I think that's because it uses GLEW that refers to many old glu functions.) That's really tiring and I still do not have a proper solution.