[R-SIG-Win] Rtools43

[Tomas Kalibera]

Dear R Windows developers,

there is now a new toolchain for R for Windows, Rtools43. It is now used 
by R-devel and is intended, following likely at least one minor update, 
for R 4.3.0.

Compared to Rtools42, it uses GCC 12 and updates other core components. 
See https://cran.r-project.org/bin/windows/Rtools/rtools43/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 Rtools43. From the user perspective, 
Rtools43 works the same way as Rtools42. 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 Rtools42.

Best
Tomas