![]() No further set up is needed to e.g.: install.packages("PKI", type="source") One only needs to install the R build (via the installer) and Rtools42 (as described above), in either order. Building packages from source using Rtools42 When done that way, Rtools42 may be used in the same R session which installed it or which was started before Rtools42 was installed.įrom the user perspective, Rtools42 works the same as Rtools4 and the installer is almost the same, but the installation is one step easier (one does not have to set PATH). It is recommended to use the defaults and install into c:/rtools42. The advantage is that this way it is easy to ensure that the toolchain and the libraries are always compatible, and to upgrade the toolchain and all libraries together. It is bigger than Rtools4 because it includes libraries needed by almost all CRAN packages, so that such libraries don’t have to and shouldn’t be downloaded from external sources (the CRAN Repository Policy has details on requirements on CRAN). The installer has currently about 400MB in size and about 3GB will be used after installation. Rtools42 is available via a standalone offline installer which contains all of these components and is available from here, as a file named like rtools42-4737-4741.exe, where 4737-4741 are version numbers. The compiler toolchain, headers and pre-compiled static libraries are built using MXE. R 4.2 uses Rtools42, where the build tools are from Msys2 and QPDF. R and packages are built using Rtools, which is a collection of build tools, a compiler toolchain, headers and pre-compiled static libraries. Not needed for the “recommended” packages, but some other contributed CRAN R packages may require additional external software to install or for the checks (more below). Inno Setup is needed to build the R installer. ![]() MikTeX (with basic packages and inconsolata) is needed to build package vignettes and documentation. External software for building from source ![]() Users only needing to build existing packages from source will need to read only the first two sections. This document is written as a tutorial intended to be read from the beginning until reaching the point with the required information. Howto: Building R 4.2 and packages on Windows Howto: Building R 4.2 and packages on Windows
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