* installing to library ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages’
* installing *source* package ‘optional’ ...
** package ‘optional’ successfully unpacked and MD5 sums checked
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
  converting help for package ‘optional’
    finding HTML links ... done
    fallthrough                             html  
    make_opt                                html  
    match_with                              html  
    none                                    html  
    opt_unwrap                              html  
    option                                  html  
    some                                    html  
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (optional)