Installation of R-4.3.1 with intel 2022

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 Cal?

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On 22 Jun 2023, at 16:23, Martin Maechler <maechler at 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.