[Paraview] Bug 0006714: pvbatch requires X server

[Utkarsh Ayachit]

Hi Kent,

Attached is patch. With this patch (and OSMesa build) I could do:

mpirun -np 2 ./bin/pvbatch --use-offscreen-rendering  /tmp/foo.py

on a machine with no X. I still get the  "bad X server connection." from 
the OpenGLExtensionManager -- which I guess you fix using Pat's 
suggestions. However, in spite of the error message, things should work 
fine.

Let me know if this patch works, if so, I'll commit it to the CVS.

Utkarsh

pat marion wrote:
> It's been a couple months since I worked through this issue, but if I 
> remember correctly it is in VTK/Rendering/CMakeLists.txt:
> 
>     IF(VTK_USE_X)
>       CHECK_FUNCTION_EXISTS(glXGetProcAddressARB 
> VTK_USE_GLX_GET_PROC_ADDRESS_ARB)
> 
> So, if VTK_USE_X is true (on Linux it is forced true, perhaps this 
> should be changed?) then it checks for glXGetProcAddressARB.  So it 
> doesn't even matter if X11_*_LIB cmake variables are set or not.  
> CHECK_FUNCTION_EXISTS finds X11 and compiles it into the extension 
> manager.  If you clear cmake's references to XLibs, you'll get linker 
> errors.
> 
> Pat
> 
> On Fri, Apr 4, 2008 at 1:49 PM, Kent Eschenberg <eschenbe at psc.edu 
> <mailto:eschenbe at psc.edu>> wrote:
> 
>     Hi Pat,
> 
>     Sorry I posted my previous note to the list; I didn't look at the
>     email addresses carefully.
> 
>     So on my Linux cluster build, if I delete all references to X11
>     files in cmake, would cmake still proceed? Would that help?
> 
>     Kent
> 
> 
>     pat marion wrote:
> 
>         Didn't want to imply that compiling on XT3 requires hacked cmake
>         files.  The XT3 build works from CVS head without modifications.
> 
>         My issue was when X11 libs were found by cmake, but I wanted to
>         compile without them.  This wasn't a problem on XT3 because X11
>         isn't found at all.
> 
> 
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