[R-pkg-devel] doMC dependency

[Patrick Schratz]

Check the pbapply package for cross-platform apply* parallelization. Also 'future' might be worth a look (by Henrik Bengtson) although I haven't taken a closer look at it yet.

On 15. May 2017, 21:09 +0200, Uwe Ligges <ligges at statistik.tu-dortmund.de>, wrote:
> The question is why you want to make doMC an hard install time dependency.
>
> Better make it optional (via Suggests) and provide different
> parallelization mechanisms on platforms where doMC is unavailable.
>
> Best,
> Uwe Ligges
>
>
>
>
> On 15.05.2017 21:00, David Hugh-Jones wrote:
> > From what you say it sounds as if your package fails on Windows because,
> > well, it doesn't work on Windows, given that doMC isn't available. Trying
> > to hide that would seem weird. Does CRAN insist that all packages should
> > work on all platforms?
> >
> > On Mon, 15 May 2017 at 19:40, Christopher Lalansingh <
> > Christopher.Lalansingh at oicr.on.ca> wrote:
> >
> > > Hi everyone,
> > >
> > >
> > > I'm preparing to release a package which uses doMC for parallelization in
> > > certain functions. I've used require(doMC) to specify this for these
> > > functions, and importFrom("doMC", "registerDoMC") in my NAMESPACE.
> > >
> > >
> > > I ran all the R CMD --as-cran checks under 3.4.0 and R-devel on Debian 8
> > > sucessfully, but when I submitted to CRAN the package failed when built on
> > > Windows. This is because doMC is not available for Windows. It was
> > > recommended by Uwe Ligges that I move doMC to "Suggests", but since doMC is
> > > required for functions in my package this does not seem to work:
> > >
> > >
> > > * checking package dependencies ... ERROR
> > > Namespace dependency not required: 'doMC'
> > >
> > >
> > > Is there a way to keep doMC in 'Suggests' by changing how I attach/load
> > > doMC in my package?
> > >
> > >
> > > Thanks for your help,
> > >
> > >
> > > Christopher Lalansingh
> > > Software Engineer
> > >
> > >
> > > Ontario Institute for Cancer Research
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> > > Toronto, Ontario, Canada M5G 0A3
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> > >
> > >
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