[ESS] R 4.0

[Lionel Henry]

macOS filesystems are indeed case insensitive by default (you can
format with sensitivity enabled if you like), but this is not
necessarily a concern here.

On macOS, R is typically installed as a "framework". In that case we
use RSwitch.app to change the version that the `R` symlink points
to. Maybe other users have a different experience, but I've never used
the special `R-` runners that ESS creates.

Best,
Lionel

On 4/18/20, Dirk Eddelbuettel via ESS-help <ess-help using r-project.org> wrote:
>
> On 18 April 2020 at 13:57, Martin Maechler via ESS-help wrote:
> | But on that most-used (non-)operating system,  lowercase and
> | uppercase are mostly equivalent in file names *and* executables
> | are file names, no?
>
> No:
>
>   edd using rob:~$ r --version | head -1
>   r ('littler') version 0.3.9
>   edd using rob:~$ R --version | head -1
>   R version 3.6.3 (2020-02-29) -- "Holding the Windsock"
>   edd using rob:~$
>
> Also, remember that R CMD calls for 25 years into i.e. INSTALL to avoid
> /usr/bin/install from GNU?  Same reason.
>
> The only "famous" and very braindead exception is macOS where I recommend
> littler users build it as 'lr' because there (and only there) r == R.
>
> Dirk
>
> --
> http://dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org
>
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