Do note that R-3.0.2 requires a higher version of gfortran 4.4.4 and above. To help ensure that the gfortran44 is installed, do check that the gnu44 are installed. For more information how to install, see Installing GNU 4.4 of C, C++ and gfortran for CentOS 5

Compiling R-3.0.2

# tar -zxvf 3.0.2.tar.gz 
# ./configure --prefix=/usr/local/R-3.0.2/ CC=gcc44 CXX=g++44 F77=gfortran44 FC=gfortran44
# make
# make install