[R-SIG-Mac] R.app doesn't respect DYLD_FALLBACK_LIBRARY_PATH

[Tom Schoenemann]

Hello,

I am trying to get a custom R package (from another group) to run on my system. If I call it from the command line r, it works fine.  If I call it from R.app, it complains with:

Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/Library/Frameworks/R.framework/Versions/3.0/Resources/library/ANTsR/libs/libRantsRegistration.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/ANTsR/libs/libRantsRegistration.so, 6): Library not loaded: libitkdouble-conversion-4.5.1.dylib
  Referenced from: /Applications/image-processing/ANTsR/src/ANTS/ANTS-build/lib/libl_antsRegistration.dylib
  Reason: image not found
Error: package or namespace load failed for ‘ANTsR’

(ANTsR is the package I'm trying to get working)

I CAN get it to work by doing this on the command line first:

export DYLD_FALLBACK_LIBRARY_PATH=/Library/Frameworks/R.framework/Resources/lib

and then also opening the R.app from the command line:

open /Applications/R.app/

However, I can't seem to get R.app to know about 
export DYLD_FALLBACK_LIBRARY_PATH=/Library/Frameworks/R.framework/Resources/lib
unless I do it this way. 

So my questions are:

1) how can I get R.app to know about the DYLD_FALLBACK_LIBRARY_PATH?  I tried putting it into my .Renviron file, but it doesn't work  (maybe the syntax is supposed to be different?)

2) why does r on the command line know about dynamic libraries, but R.app does not?? This seems like a bug, but maybe there is a good reason for it?

Thanks for any suggestions,

-Tom