[R-SIG-Mac] Starting tcltk without Tk

[Simon Urbanek]

Philippe,

I'm not quite sure why you are asking on a Mac list, but the error  
comes from Tcl/Tk. I'd suggest asking on R-devel, the Tcl/Tk used in  
the R binary is the same for R 2.6.x and 2.7.0 so it must be a change  
in tcltk.

Cheers,
Simon


On May 4, 2008, at 7:01 AM, Philippe Grosjean wrote:

> Hello,
>
> Up to R 2.6.2, I used to start Tcl *without Tk* (I need only Tcl for  
> some part of my work, like a socket server written in Tcl only, for  
> instance) with this code under Mac OS X (particularly on this  
> system, because I don't want to start X11 just to use Tcl code,  
> which is required for Tk!):
>
> > Sys.unsetenv("DISPLAY")
> > library(tcltk)
>
> I got then the message "no DISPLAY variable so Tk is not available",  
> but could work with Tcl without problems.
>
> Now, with R 2.7.0, I got the following and Tcl failed to load:
> Loading Tcl/Tk interface ... Error in fun(...) : no display name and  
> no $DISPLAY environment variable
> Error : .onLoad failed in 'loadNamespace' for 'tcltk'
> Error: package/namespace load failed for 'tcltk'
>
> I try to locate the message "no display name and no $DISPLAY  
> environment variable" in the code but I cannot find it. Could  
> someone help me please?
>
> I understand that starting Tcl without Tk from R is not an intended  
> behaviour, but would it be possible to include an option to do so?
>
> > sessionInfo()
> R version 2.7.0 Patched (2008-04-22 r45460)
> i386-apple-darwin8.10.1
>
> locale:
> en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> Many thanks,
>
> Philippe Grosjean
> -- 
> ..............................................<°}))><........
> ) ) ) ) )
> ( ( ( ( (    Prof. Philippe Grosjean
> ) ) ) ) )
> ( ( ( ( (    Numerical Ecology of Aquatic Systems
> ) ) ) ) )   Mons-Hainaut University, Belgium
> ( ( ( ( (
> ..............................................................
>
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