Can not find man page for GLUT routines in Linux?

I made up the man page for GLUT (so that I can ^K to call the API manual out while the cursor is on the words symbolizing GLUT routines) by the simplest way:

sudo yum  list "*glut*"

more than a couple was found and following two are among the alternatives:

sudo -y install freeglut freeglut-evel


now enter into vim again and try ^K on "glutWindowSize" for instance, check if it works now.