Platforms
-
get_cran_extension() -
get_all_package_dirs() -
async_repo_status() -
packages_make_target() -
packages_make_sources() -
cmc__get_cache_files() -
current_r_platform() -
default_platforms()
Windows
Windows is special, because the same repository is used for multiple architectures. Probably most people us 64 bit R on Windows, because that’s what RStudio starts by default. But we also need to make sure that people who need 32 bit R will have a way to install packages, without ruining the 64 bit installation.
Luckily, there are no packages on CRAN and Bioconductor currently that are 32 bit only. (There are a few that are 64 bit only.) In addition, 32 bit R currently installs the package both both architectures, when installing for source. (64 bit R-devel does the same currently, but this might change.)
In light of these, this is what we do: - The default platform is
x86_64-w64-mingw32 on 64 bit R from R 4.2. It is
i386+x86_64-mingw32 on 64 bit R before R 4.2. - The default
platform is i386+x86_64-w64-mingw32 on 32 bit R. - The
windows platform name is an alias to
i386+x86_64-w64-mingw32. - When compiling a package from
source, we’ll observe the requested platform name: - For
x86_64-w64-mingw32 on 64 bit R, we compile 64 bit only. -
For i386-w64-mingw32 on 64 bit R, we compile for both 32
bit and 64 bit. (There is probably no way to avoid using the current
arch.) - For i386+x86_64-w64-mingw32 on 64 bit R, we
compile for both 32 bit and 64. - For i386-w64-mingw32 on
32 bit R, we compile for both 32 bit and 64 bit. This is to avoid
mistakenly messing up a 64 bit library. - For
x86_64-w64-mingw32 on 32 bit R, we compile for both 32 bit
and 64 bit. (There is probably no way to avoid using the current arch.)
- For i386+x86_64-w64-mingw32 on 32 bit R, we compile for
both 32 bit and 64.
In summary, when compiling packages, we compile for both archs,
unless the platform is x86_64-w64-mingw32 and we are in a
64 bit R session.