Hi, the test program in the bottom doesn't work as expected in slime on my linux systems: It should do the following: when calling (run) with C-M-x it opens a window. When pressing ESC in this window it will close. When calling (run) again slime is destroyed.

One work around I found is to call (reinit) before calling (run) the second time.

The problem is that *glut-initialized-p* isn't reset to nil after leaving the main loop in glut/main.lisp: ;; this is the fix: (defun main-loop () (without-fp-traps (%glutMainLoop)) (setf *glut-initialized-p* nil) ; add this line to fix the bug init))

;; this is the test program: #.(progn (require :asdf) (require :cl-opengl) (require :cl-glut) (require :cffi))

(defpackage #:mk (:use #:cl #:gl #:cffi)) (in-package #:mk)

(defcallback draw :void () (clear :color-buffer) (with-primitives :lines (vertex 1 0) (vertex 0 1)) (glut:swap-buffers))

(defcallback key :void ((key :uchar) (x :int) (y :int)) (declare (ignore x y)) (case (code-char key) (#\Esc (glut:leave-main-loop))))

(defun run () (glut:init) (glut:init-display-mode :double :rgb) (glut:create-window "test") (glut:display-func (callback draw)) (glut:keyboard-func (callback key)) (glut:main-loop))

(defun reinit () (with-foreign-objects ((argcp :int) (argv :pointer)) (setf (mem-ref argcp :int) 1) (with-foreign-string (str "test") (setf (mem-ref argv :pointer) str) (glut::%glutInit argcp argv))))