[BEGINNER] How do I generate CMAKE_AR configuration?

I am following a tutorial on youtube by freecodecamp.org about OpenGL, creating 3D and 2D graphics in C++. At around 3:13 in the video, I generated everything seen in the list besides CMAKE_AR. I’ve tried researching it for hours but no luck.

CMAKE_AR isn’t really a variable you should have to worry about.

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In cmake-gui click grouped/advanced and you should see it:
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Well thanks. I probably should’ve click-explored before posting huh lol.