[R-SIG-Win] Rtools44

[Tomas Kalibera]

Dear R Windows developers,

there is now a new toolchain for R for Windows, Rtools44. It is now used 
by R-devel and is intended for R 4.4.0.

Compared to Rtools43, it uses GCC 13 and updates other core components. 
See https://cran.r-project.org/bin/windows/Rtools/rtools44/news.html for 
a detailed list of changes.

All users of R-devel who need to compile R packages with source code in 
C, C++ or Fortran should install Rtools44. From the user perspective, 
Rtools44 works the same way as Rtools43. See 
https://cran.r-project.org/bin/windows/base/howto-R-devel.html for 
instructions on how to build R-devel and packages for this version of R.

It is recommended to re-install packages that need compilation to avoid 
potential incompatibilities with code built using Rtools43.

Rtools44 also includes an experimental version for 64-bit ARM machines, 
using LLVM 17 (and clang, flang-new, lld, libc++) - the aarch64 version 
of Rtools has its own installer and distribution tarballs.

Best
Tomas