GNU bug report logs - #66277
R build processes use all the available cores

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Subject: R build processes use all the available cores
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Hi!

I noticed on guix.bordeaux.inria.fr, which builds guix-cran, that R
build processes would unconditionally use all the available cores
(specifically, launching one R process per core), ignoring the value of
=E2=80=98parallel-job-count=E2=80=99.

I believe all r-* packages are affected.

On IRC, Ricardo wrote:

--8<---------------cut here---------------start------------->8---
<rekado> the build system uses R CMD INSTALL, which in turn uses
	 install.packages(); that procedure takes an argument Ncpus, which by
	 default is whatever getOption("Ncpus") returns (or 1).  [16:16]
<rekado> that=E2=80=99s used as an argument to =E2=80=98make=E2=80=98 (if i=
t needs to be called)
--8<---------------cut here---------------end--------------->8---

Maybe we should set that =E2=80=98Ncpus=E2=80=99 option to what =E2=80=98pa=
rallel-job-count=E2=80=99
returns?

Ludo=E2=80=99.