[R] R-3.1.1 - R CMD INSTALL problem

[Eduardo M. A. M.Mendes]

Hello

I have recently upgraded R to the newest version.  Unfortunately my old (fortran and C) R-package cannot be installed anymore (was built before R 3.0.0: please re-install it). 

I have tried R CMD INSTALL package_name but I noticed that R requests gcc-4.8.2 and specific locations for the libraries (gcc and gfortran).   Can someone point me to the documentation on how to install  gcc as R requires, please?

Please note that I have used "brew install gcc" on another mac and soft linked all the necessary libraries so that gcc-4.9.1 can be used as 4.8 (as R requires). However I would like a clean installation.

Many thanks

Ed