[R-pkg-devel] Using the correct R binary in configure script
edd at debian.org
Sat Sep 26 22:54:26 CEST 2015
On 26 September 2015 at 22:29, peter dalgaard wrote:
| > On 26 Sep 2015, at 17:43 , Dirk Eddelbuettel <edd at debian.org> wrote:
| > R_HOME is set to the result of the command R RHOME if and only it is unset.
| > And it usually is unset.
| Did you actually mean that, Dirk?
Yes. But I didn't make myself very clear, as you noted.
What I meant to say, but did not, sadly, was that via PATH and called the
corresponding R front-end script from the particular (via PATH or explicit
absolute dir/path/to/R we get R_HOME set by the particular R invoked.
Which then calls configure for us, and that is how configure sees it as set
without the need for explicit settings.
| I would expect that R_HOME would be set by "myR CMD whatever" before it got
| to the configure script, so that the default R would only be used as a last
| resort. And R rather actively defends itself against R_HOME being set in
| its environment.
| $ R_HOME=/tmp R CMD env | grep R_HOME
| WARNING: ignoring environment value of R_HOME
| (I'm not sure that it is actually supposed to work, but apparently R CMD foo executes 'foo' in the same environment as R CMD check et al.)
Some backends take advantage of that. Rserve comes to mind IIRC.
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
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