From the NEWS for R 4.5.0:
• It is intended that this will be the last update to BLAS and
LAPACK in the R sources. Those building R from source are
encouraged to use external BLAS and LAPACK and this will be
required in future.
Your package could be using an external BLAS/LAPACK, or include the
routines you want in the package sources (if the licences allow).
On 20/09/2025 01:34, Pierre Lafaye de Micheaux via R-devel wrote:
Dear R developpers,
Two months ago, I sent an email to the CRAN team asking if they would consider
adding more LAPACK routines to the R's source tree. I have not received a
response from them, which led me to assume that maybe I used the wrong
communication channel. (I apologise if this is the case.)
My goal is to revive my "IndependenceTests" package. It was archived in 2021
(because I had not been able to solve various issues on time).
I have now been able to resolve most of the issues, though I still WARNINGs
such as:
Warning: GNU Extension: Nonstandard type declaration COMPLEX*16 at (1)
It is my firm belief that I cannot solve these issues without modifying several
(old) Lapack Fortran source files.
Now, in Section 6.7 of the "Writing R Extensions" manual, I read that the current set of LAPACK subroutines included in R "might be supplemented".
That is about those declared in Lapack.h, not about the routines
included in the R sources.
Also, in the
https://github.com/SurajGupta/r-source/blob/master/src/modules/lapack/README
file,
That is not the official R sources and appears to be several years
out-of-date.
I see that some Lapack files were added over the years to the R source tree.
But not all the ones I need, unfortunately.
The file I would like to be added to the R source tree is the following:
zhpevx.f
which in turn needs those below that are not in the R Lapack:
lsame.f
xerbla.f
Those two are included -- lsame.f as part of the BLAS, xerbla is
implemented via a C version.
zhptrd.f
zlanhp.f
zstein.f
zupgtr.f
zupmtr.f
Would you kindly let me know if:
1.
A formal request to add these LAPACK routines to the R's source tree is
something that can be considered?
See above.
2.
Alternatively, would a submission with these few remaining warnings still be
acceptable?
It is not clear what those are. No CRAN package is showing COMPLEX*16
warnings in its checks although two do in their installation logs.
I fully understand if this falls outside the scope of R Core Team or CRAN's
intended support, but any guidance would be greatly appreciated.
Thank you in advance for your time and consideration.
Kind regards,
Associate Professor Pierre Lafaye De Micheaux
UNSW Sydney
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--
Brian D. Ripley, [email protected]
Emeritus Professor of Applied Statistics, University of Oxford
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