On 7/13/24 12:24, Simon Urbanek wrote:
On 12 Jul 2024, at 10:07, Ivan Krylov via R-package-devel
<r-package-devel@r-project.org> wrote:
В Thu, 11 Jul 2024 20:58:53 +0000
DRC via R-package-devel <r-package-devel@r-project.org> пишет:
1. How does linking to external libs differ from providing the source
of a library and linking against that?
I think that the author information in the DESCRIPTION is about what your package
provides by itself, not everything that may end up in the address space once the
package is loaded. Since CRAN prefers self-contained packages, we end up including them
in our packages (unless the third-party library is already very common and present in
RTools & macOS recipes & common GNU/Linux distros), which requires us to
specify their authors.
To clarify: as far as CRAN is concerned you only need to include sources that
are otherwise not commonly available - or if you need to modify them for the
purpose of the package, so it should be quite rare. In fact the CRAN policy
states that a package should always look for an available library first. If we
just are talking about libraries then a very rough rule of thumb is that if
your dependent library is in Debian then you don't need to ship it as sources.
That said, if you are using something that is not in the current Rtools/recipes
then you have to tell CRAN so we can be add it to macOS and Windows toolchains
(assuming both are supported by the library you need) - but that doesn't mean
you should ship them yourself (in fact that tends to cause a lot more problems).
And you can indeed help with adding such library to Rtools/recipes. In
case of Rtools, ideally first add it upstream to MXE.
Best
Tomas
Cheers,
Simon
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