R devel - Dec 2021 - Question about the UCRT switch

The connected blog has the statement? "Most authors will not have to do
anything as the
number of CRAN packages that will need some attention is below 1%, but authors
of packages
using native (C, C++ or Fortran) code should read the following lines."

My packages do use a lot of C, but I never use Windows.?? My reading of
"the following
lines" is that? I don't have to do anything.?? Is this correct?

Terry T.


-- 
Terry M Therneau, PhD
Department of Quantitative Health Sciences
Mayo Clinic
therneau at mayo.edu

"TERR-ree THUR-noh"


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On 12/9/21 3:30 PM, Therneau, Terry M., Ph.D. via R-devel
wrote:
> The connected blog has the statement? "Most authors will not have to
do anything as the
> number of CRAN packages that will need some attention is below 1%, but
authors of packages
> using native (C, C++ or Fortran) code should read the following
lines."
>
> My packages do use a lot of C, but I never use Windows.?? My reading of
"the following
> lines" is that? I don't have to do anything.?? Is this correct?
Well but your users might be using Windows, so as long as your package 
is on CRAN and you are maintaining it to support Windows, the blog might 
have useful information for you - for instance how to check whether you 
need to update your packages or not, but see below.

Specifically for your case, CRAN packages bdsmatrix, coxme, deming, 
noweb and survival are passing their checks with the new toolchain, as 
can be seen from the result pages such as

https://cran.r-project.org/web/checks/check_results_survival.html

They do not use any installation-time patches, as can be seen from

https://svn.r-project.org/R-dev-web/trunk/WindowsBuilds/winutf8/ucrt3/r_packages/patches/CRAN/

So, you really don't have to do anything, as most package authors with 
native code who don't use Windows.

Best
Tomas
>
> Terry T.
>
>