R 4.0 Path to rtools in Windows

[dmenne]

• Uninstalled old R-Tools, removed all PATH related to rtools

• Uninstalled R 3.5

• Installed R 4.0 RC, updated libraries all ok when no rebuild required.

• Installed rtools in default directors rtools40 with windows installer.

• Added path to C:\rtools40\mingw64\bin. c++ and g++ can be called from command line

• https://cloud.r-project.org/bin/windows/testing/rtools40.html: No path set in .Renviron

• Rtools from R not found. Tried dozens of paths variants

> pkgbuild::with_build_tools()
Fehler: Could not find tools necessary to compile a package
Call `pkgbuild::check_build_tools(debug = TRUE)` to diagnose the problem.
> devtools::find_rtools()
WARNING: Rtools is required to build R packages, but the version of Rtools previously installed in C:/rtools40 has been deleted.
Please download and install Rtools custom from https://cran.r-project.org/bin/windows/Rtools/.

[jeroen]

We are still migrating the windows infrastructure. Please try again after the weekend...

[jeroen]

This should be fixed now in the latest rtools/pkgbuild.