The best place for reporting bugs is via the r-windows organization on GitHub. Older editions were put together by Prof. Brian Ripley and Duncan Murdoch. The current version of Rtools is maintained by Jeroen Ooms. The references at the bottom of this document contain more information. The main difference between upstream msys2 and rtools4 is that our toolchains and libraries are configured for static linking, whereas upstream msys2 prefers dynamic linking. The msys2 documentation gives an overview of the supported environments in msys2 and a comparison of MSVCRT and UCRT. C:\rtools40\ucrt64: a 64-bit gcc-10.3.0 ucrt toolchain for R 4.2 1 R Warning in install.packages : lib 'C:/Program Files/R/R-3.6.The latest builds of rtools4 contain 3 toolchains: This version of Rtools is based on msys2, which makes easier to build and maintain R itself as well as the system libraries needed by R packages on Windows. The best place for reporting bugs is via the r-windows organization on GitHub.Starting with R 4.0.0 (released April 2020), R for Windows uses a toolchain bundle called rtools4.
1 When you install development packages using devtools::installgithub() you are installing source packages. When you install released packages from CRAN using install.packages() you are installing binary packages. The references at the bottom of this document contain more information. There are two different types of R packages you can install, binary packages and source packages. To use rtools, download the installer from CRAN: On Windows 64-bit: rtools40-x8664.exe (includes both i386 and 圆4 compilers). By default, R for Windows installs the precompiled binary packages from CRAN, for which you do not need Rtools. The latest builds of rtools4 contain 3 toolchains: Note that Rtools is only needed build R packages with C/C++/Fortran code from source.
Starting with R 4.0.0 (released April 2020), R for Windows uses a toolchain bundle called rtools4.
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