A Master student of? us has just send us the way he has found to get out
of the problem met. Here is the translation of his mail:
I have updated R to 4.1.2 using updateR() of the package installr from
the R consol, specifying I want to keep the packages.
I have installed Rtools from there:
https://cran.rstudio.com/bin/windows/Rtools/rtools40.html
Then I have opened the consol and applied:
write('PATH="${RTOOLS40_HOME}\\usr\\bin;${PATH}"', file = "~/.Renviron",
append = TRUE)
then restarted R, and checked the RTools path applying:
Restart R, and verify that make can be found, which should show the path
to your Rtools installation.
Sys.which("make")
## "C:\\rtools40\\usr\\bin\\make.exe"
then install.packages("terra", type = "source")
It has solved the problem, pgirmess work without trouble now.
This fit with Roger's info about late updates from *.tar.gz and *.zip?
on CRAN messing a standard installation.
Best,
Patrick