This worked for me, at the command line.
$sudo R CMD INSTALL --configure-args="--with-netcdf-include=/usr/include/" Downloads/ncdf_1.6.5.tar.gz
Then, at command line, $sudo R
>install.packages() a pop up appears from which I choose the nearest CRAN mirror. Then I choose clim.pact
Now, back to clim.pact
Run R as normal user (no sudo)
Loading required package: ncdf
Loading required package: akima
Ok, so far so good.
If clim.pact is having problems, install locally as:
sudo R CMD INSTALL /Downloads/clim.pact_2.3-7.tar.gz