Q:

R submit to CRAN: which R version to build package?

I want to submit a package to CRAN. In the CRAN repository policy 
it states that 
"Packages for which R CMD check gives an ‘ERROR’ when a new R x.y.0 version is released will be archived".
It also says "Please ensure that R CMD check --as-cran has been run on the tarball to be uploaded before submission".
Running R CMD check --as cran on my tarball gives me the warning:
Warning: unknown option ‘--as-cran’

I am running R version 2.14.1 on Ubuntu 12.04.2 LTS. Can I build a source package using this version or do I have to use R 3.0?
And why does R CMD check --as-cran not work for me?

A:

The document you link to says:

Please ensure that R CMD check --as-cran has been run on the tarball
  to be uploaded before submission. This should be done with the current
  release of R or (preferably) R-devel or R-patched.

So, right now, you should use R-3.0.1 and also test against the R-devel branch (if possible).

