[Rd] Installation of R-4.3.1 with intel 2022

[Giuseppe Calò]

yes I think it is caused by the absence of matther in glibc. To compile R with icc I disabled matther (with gcc matherr is self disabled). Is it safe to keep it disabled matherr?

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Giuseppe Calò

Fondazione CMCC
Centro Euro-Mediterraneo sui Cambiamenti Climatici presso Complesso Ecotekne 
Università del Salento - Strada Prov.le Lecce - Monteroni 73100 Lecce  IT
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email: giuseppe.calo using cmcc.it

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> On 22 Jun 2023, at 16:23, Martin Maechler <maechler using stat.math.ethz.ch> wrote:
> 
> Thank you, Giuseppe,
> 
> so indeed using the same restriction has we had on 32-bit
> platforms seems sufficient here.
> 
> Your .Machine() is 100% the same as mine (Linux Fedora 36; using
> GCC, R's BLAS and OS-provided Lapack), so that cannot help to
> detect that your R is set up differently than mainline versions
> of R.
> 
> My guess would be that this difference is not because of the use
> if icc, but only because of the libmath-part (not the
> BLAS/Lapack part) of MKL ... but of course that's only a guess. 
> 
> Would anyone know how to reliably detect from within R that R is
> linked against an MKL math library?
> .. if not generally, may be in the subset of cases where
> 
>   .Platform$OS.type == "unix" &&
>    Sys.info <http://sys.info/>()[["sysname"]] == "Linux"
> 
> ??
> 
> 
> Of course, we could fudge our checks and look for 'mkl' in
> 
>    extSoftVersion()["BLAS"]
> 
> and/or
> 
>    La_library()
> 
> but I said above that it's much more probable that the
> "libmath"-part of MKL is at stake here, not the BLAS or Lapack
> one.


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