[R-SIG-Win] Changelog for Rtools42

[Tomas Kalibera]

On 4/14/22 05:08, Avraham Adler wrote:
> Hi, Tomas.
>
> Is there a changelog for Rtools42 anywhere; something that would
> explain the difference between 5111 and 5168, for example? Copying
> r-sig-windows for reference.

Hi Avi,

for now one can only find out directly from the subversion, as shown 
here. In short, there is no fundamental change affecting package authors.

(1)

svn diff -r 5111:5168 
https://svn.r-project.org/R-dev-web/trunk/WindowsBuilds/winutf8/ucrt3/toolchain_libs

gives you the diff for the toolchain and libraries.

C++ library is built with more precise timers. This is not by default in 
MXE, but I added that to match Msys2 and the previous behavior, on which 
package benchr depends, so this fixed the package.

Then, the distribution of the cross toolchain has been improved. There 
are new sections in the documentation about using the cross-compilers 
and setting up the build tree from the distributed files so that you 
don't have to build Rtools from scratch. This is useful for people 
wanting to contribute to Rtools (and hence MXE).

(2)

svn diff -r 5111:5168 
https://svn.r-project.org/R-dev-web/trunk/WindowsBuilds/winutf8/ucrt3/rtools

shows nothing, so no changes in rtools build scripts

In addition, Rtools42 also have the Msys2 part, which is current when 
Rtools is built. But I am not aware of a fundamental change that would 
impact R package authors.

Best
Tomas




>
> Thank you,
>
> Avi