Dear Rob, thank you for this advice! Now R is compiling packages without any errors. > Then edit the FLIBS line in /usr/lib64/R/etc/Makeconf and remove all the > references to the static libraries /builddir/..../lib*.a (as per the > errors above). However, I wonder who added the newer zlib, curl etc. libraries to compile the EPEL 6 R packages, as these require a newer kernel than being provided by RHEL/CentOS 6... Regards, Martin