From: anne001 Date: 2006-07-27T03:15:09+09:00 Subject: Re: rb-gnome and gtkglext I tried that because ./configure gives me that error. on the nehe site for mac OSX, they don't use GL/gl.h but OpendGL/gl.h #include // Header File For The OpenGL32 Library #include // Header File For The GLu32 Library #include // Header File For The GLut Library http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=Mac_OS_X so I wonder if my problem is because on I on the mac and I should be calling OpenGL but I don't know how to pass that information to the configure program. ./configure --with-gl-includedir=/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks/OpenGL.framework/OpenGL/GL gives me the same error.