How would I compile raylib for OpenGL 3.1

[Cube5x59999]

I saw the wiki to compile for another versions on opengl and it says using notepad++, so I installed it and the wiki has no like which file to open first, so I'm stuck, does it mean compiling my program or which main library file?

I use vscode for my program

[CrackedPixel]

To change OpenGL versions you would want to change the GRAPHICS flag in the Makefile (or config/etc depending on how you build raylib)

But 3.1 does not seem like a valid selection. The following are choices:
GRAPHICS_API_OPENGL_11
GRAPHICS_API_OPENGL_21
GRAPHICS_API_OPENGL_33 (default)
GRAPHICS_API_OPENGL_43
GRAPHICS_API_OPENGL_ES2 (mobile)

taken from https://github.com/raysan5/raylib/blob/master/src/Makefile#L235