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POHow to use current version of opengl in cygwin?
 

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  1. POHow to use current version of opengl in cygwin?
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    <p>I have been using OpenGL with cygwin for a few months to program some 3d applications. I now want to attempt to write some slightly more advanced techniques using things like vertex buffer objects. However, I noticed that I ran into an obstacle: when I use <code>glGetString(GL_VERSION)</code> in my program it spits out 1.4.</p> <p>I compile my program with these flags: <code>-lGL -lglut -lGLU -lGLEW</code> and have included these headers: <code>freeglut.h glew.h</code>. I have chosen to link against the X11 libraries vs. the windows ones as explained <a href="https://stackoverflow.com/questions/389488/compiling-minimal-glew-application-under-cygwin">here</a>. My current OpenGL programs build and are able to run (because up until now, I have used older functionality--pre-OpenGL 1.4).</p> <p>I have a new desktop computer with an ATI FirePro V4800 (FireGL) graphics card that can support up to OpenGL 4.1. I have installed the latest drivers and it passes the tests supplied by the program: OpenGL Extensions Viewer. In addition, the program shows that all the extensions up to and including 4.1 are available for my graphics card.</p> <p>There is a brief mention <a href="https://stackoverflow.com/questions/14344/starting-off-with-opengl-under-cygwin">here</a> under the last answer saying that cygwin may want to use older dlls (ones that don't support shaders, etc.). Is this a cygwin problem? Will cygwin just not recognize my latest drivers and offer me the cool stuff in OpenGL 4.1? Or am I not linking to the correct libraries?</p> <p><strong>UPDATE</strong></p> <p>After getting to know how Cygwin's X Server works I figured I should switch to freeglut's native windows libraries. I grabbed the pre-compiled binaries found <a href="http://www.transmissionzero.co.uk/software/freeglut-devel/" rel="nofollow noreferrer">here</a> and put the files in appropriate directories to link against them. After recompiling I am able to use all the options found in OpenGL as my graphics card permits (4.1).</p>
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    1. COWhat makes you think that this has anything to do with Cygwin (which is nothing more than a shell)? It's more likely to be your code than Cygwin.
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    2. COOK. Perhaps I don't understand how cygwin interacts with my system's drivers. I have tried an example program found on this [site](http://www.opengl.org/wiki/Tutorial1:_Rendering_shapes_with_glDrawRangeElements,_VAO,_VBO,_shaders_%28C%2B%2B_/_freeGLUT%29) and receive an error saying `glXCreateContextAttribsARB not found`
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    3. CO@NicolBolas: He's using OpenGL through the Cygwin X server. That server's GLX implementation only supports OpenGL-1.4
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