Re: Help compiling 3rd party library: undefined reference error(Nicolaus Andratschke)

[Fred Kiefer]

On 17.08.2011 22:10, Nicolaus Andratschke wrote:
> Unfortunately, now I get a segfault error after I run the simple HelloWorld 
> example. For milisecond a windows pops up the the following error shows up:
>
> 2011-08-17 21:57:58.719 HelloWorld[12528] File NSOpenGLPixelFormat.m: 58. In 
> +[NSOpenGLPixelFormat _classPixelFormat] Backend doesn't have any 
> glPixelFormatClass
> 2011-08-17 21:57:58.729 HelloWorld[12528] File NSOpenGLView.m: 89. In 
> +[NSOpenGLView defaultPixelFormat] could not find a reasonable pixel format...
> 2011-08-17 21:57:58.730 HelloWorld[12528] File NSOpenGLContext.m: 40. In 
> +[NSOpenGLContext _classContext] Backend doesn't have any gl context
>
> I suspect that this has to do with the GNUstep installation I compiled myself 
> and the available (nouveau?) NVIDIA drivers.
> Again, compiling and running ProjectCenter and Gorm is ok. But this OpenGl 
> stuff completely fails.
>
> Any suggestions how to prevent this error from happening on OpenSUSE .4?

Your current problem is with GNUstep back, this doesn't seem to detect 
any OpenGl stuff. Could you please post the config.log file in your back 
directory?
I am using OpenSuse 11.4 myself but haven't used OpenGl with GNUstep. 
When checking my own config.log file I noticed that both the tests for 
OpenGl fail. The first one for the library because my system seems to 
lack the symbolic link libGL.so to libGL.so.1. And the second one as 
there isn't any header file named GL/glx.h. There is one called 
GL/glATI.h though. If things are similar on your system just adding a 
few symbolic links might help. I will try that myself and see whether 
configure will now correctly detect OpenGl.

Fred