* Added (untested) glut3 glutCheckLoop(), ans a regular display function

caca/driver_gl.c

@@ -25,6 +25,10 @@
 #include <GL/glut.h>
 #include <GL/freeglut_ext.h>
 
+#ifdef USE_GLUTCHECKLOOP
+#define glutMainLoopEvent glutCheckLoop
+#endif
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -73,6 +77,7 @@ static void gl_handle_special_key(int, int, int);
 static void gl_handle_reshape(int, int);
 static void gl_handle_mouse(int, int, int, int);
 static void gl_handle_mouse_motion(int, int);
+static void _display(void);
 
 struct driver_private
 {
@@ -146,6 +151,8 @@ static int gl_init_graphics(caca_t *kk)
     glutKeyboardFunc(gl_handle_keyboard);
     glutSpecialFunc(gl_handle_special_key);
     glutReshapeFunc(gl_handle_reshape);
+    glutDisplayFunc(_display);
+
 
     glutMouseFunc(gl_handle_mouse);
     glutMotionFunc(gl_handle_mouse_motion);
@@ -223,6 +230,7 @@ static unsigned int gl_get_window_height(caca_t *kk)
     return kk->drv.p->height;
 }
 
+
 static void gl_display(caca_t *kk)
 {
     unsigned int x, y, line;
@@ -452,6 +460,15 @@ static void gl_handle_mouse_motion(int x, int y)
     kk->drv.p->mouse_changed = 1;
 }
 
+
+
+static void _display(void)
+{
+    caca_t *kk = gl_kk;
+    gl_display(kk);
+}
+
+
 /*
  * Driver initialisation
  */

configure.ac

@@ -152,6 +152,11 @@ if test "${enable_gl}" != "no"; then
        [ac_cv_my_have_gl="yes"
         AC_DEFINE(USE_GL, 1, Define to 1 to activate the OpenGL backend driver)
         CACA_LIBS="${CACA_LIBS} -lGL -lglut"
+        CACA_DRIVERS="${CACA_DRIVERS} gl"])]
+     [AC_CHECK_LIB(glut, glutCheckLoop,
+       [ac_cv_my_have_gl="yes"
+        AC_DEFINE(USE_GLUTCHECKLOOP, 1, Define to 1 to activate the glut3 glutCheckLoop call)
+        CACA_LIBS="${CACA_LIBS} -lGL -lglut"
         CACA_DRIVERS="${CACA_DRIVERS} gl"])])])
   if test "${ac_cv_my_have_gl}" = "no" -a "${enable_gl}" = "yes"; then
     AC_MSG_ERROR([cannot find OpenGL+FreeGLUT development files])