I should have included in my last message a reference to the discussion of this issue on the R developers' list:
http://maths.newcastle.edu.au/~rking/R/devel/03a/0982.html
Here, Simon Urbanek says:
In Mac OS X native version: The R shell wrapper (bin/R) overrides default library search path with DYLD_LIBRARY_PATH and adds (among others) /usr/X11R6/lib. This causes problems when modules need (directly or indirectly) libraries from Apple's frameworks which are masked by X11. Examples for such packages are SJava and RGL. SJava needs JavaVM which in turn loads OpenGL framework. RGL needs the OpenGL framework directly. The problem is that specifying /usr/X11R6/lib in DYLD_LIBRARY_PATH forces the libGL to be loaded from the X11 directory instead of the OpenGL framework library. This crashes R due to missing symbols, since the modules must link to the OpenGL framework. In fact the OpenGL framework libraries load the X11 libraries internally (but not vice versa) - that's why the default load path is frameworks first then X11.
He suggests a temporary workaround:
Currently a workaround is to remove /usr/X11R6/lib in R from the environment variable prior to loading those packages, but more general solution would be better imho. Is the /usr/X11R6/lib really necessary in the DYLD_LIBRARY_PATH for some older OS X versions? At least for OS X 10.2 with Apple's X11 it is not necessary since X11 is already in the default load path.
Clearly the "more general solution" was never arrived at, given that the problem still exists. So how, exactly, do I go about implementing this workaround? In other words, where is the "usr/X11R6/lib" path included in R, and how do I remove it? (and, if necessary, how do I put it back afterwards?)
Also, in case it is needed, here is what typing "library(rgl)" returns in R:
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library "/usr/local/lib/R/library/rgl/libs/rgl.so":
dlcompat: dyld: /usr/local/lib/R/bin/R.bin Undefined symbols:
_glArrayElement
_glBegin
_glBindTexture
_glBitmap
_glBlendFunc
_glCallList
_glCallLists
_glClear
_glClearColor
_glClearDepth
_glColor3f
_glColor4fv
_glColor4ubv
_glColorMaterial
_glColorPointe
Error in library(rgl) : .First.lib failed
Any help would be very much appreciated. Also, apologies for sending out two messages asking the same question in such a short span of time, but I realized after sending that I did not include all of the relevant information in the first.
Matt
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