g GLFW: one selecting the window creation API, one selecting the context creation API and one client library. Exactly one of each kind must be defined for GLFW to compile and link.</p>
<p>The window creation API is used to create windows, handle input, monitors, gamma ramps and clipboard. The options are:</p>
<ul>
<li><code>_GLFW_COCOA</code> to use the Cocoa frameworks</li>
<li><code>_GLFW_WIN32</code> to use the Win32 API</li>
<li><code>_GLFW_X11</code> to use the X Window System</li>
<li><code>_GLFW_WAYL