OpenGL-1.1.0 link problem (glXMakeCurrent undefined symbols)

André Bleau
Tue Dec 9 14:06:00 GMT 2008

"Phan, Linh H"  wrote:
> Hi,
Hi Linh, 
>   I'm trying to port OpenInventor code and using the new opengl-1.1.0 and I am getting
> undefined _glXMakeCurrent symbols:
> /usr/bin/CC -g Main.o ClassDef.o Man.o Reader.o Writer.o BuildIssues.o -lInventor -lstdc++ 
>  -L/usr/X11R6/lib -L/usr/local/lib -limage -ljpeg -liconv -lFL -lfreetype 
> -lglu32 -lopengl32 -lXm -lXt -lXext -lXi -lX11 -lm   -o ivman
> /usr/local/lib/libInventor.a(So.o): In function `_ZN19SoOffscreenRendererD2Ev':
> /usr/local/src/inventor2/lib/database/src/so/SoOffscreenRenderer.c++:173: undefined reference to 
>  `_glXDestroyGLXPixmap'
> /usr/local/src/inventor2/lib/database/src/so/SoOffscreenRenderer.c++:174: undefined reference to
>  `_glXDestroyContext'
> /usr/local/src/inventor2/lib/database/src/so/SoOffscreenRenderer.c++:755: undefined reference to 
>  `_glXMakeCurrent'
> ...
> I could see it in:
> [phan@phan-xp ...inventor2/lib]$ nm /usr/X11R6/lib/libGL-1.dll.a |grep glXMakeCurrent
> 00000000 I __imp__glXMakeCurrentReadSGI
> 00000000 T _glXMakeCurrentReadSGI
> 00000000 I __imp__glXMakeCurrent
> 00000000 T _glXMakeCurrent
> What library in the new opengl-1.1.0 can I used to fix this problem?
> Thank you,
> Linh
Yeurk! The problem here is that you are trying to mix to incompatible things:
1- libraries from the w32api package (-lglu32 -lopengl32) which are about displaying 
openGL graphics directly through a native Windows interface (Win32) without any X server;
2- some other librairies (-lX...) that are about displaying through an X server. 
Than cannot work. You must make up your mind: 
Either you follow the Win32 road and you move your discussion to 
cygwin at cygwin dot com (as Yaakov suggested).
Or you follow the X server road. As OpenInventor is some SGI thing, it is probably
the best choice. In that case, you should update all your X11-related packages
(-L/usr/X11R6/lib is related to the old version). In particular, you will need 
the following packages: libGL-devel, libGL1, libGLU-devel, libGLU1, which are
about displaying openGL graphics through an X server. In that case, keep the
discussion at cygwin-xfree at cygwin dot com.
- André Bleau, Cygwin's volunteer OpenGL package maintainer.
Please direct any question or comment about the OpenGL package to cygwin at cygwin dot com

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