[R-SIG-Mac] Unable to use vecLib BLAS and LAPACK in Mac OS 11.0.1

[Anirban Mukherjee]

Hi,

I am having trouble configuring R to use the vecLib BLAS and LAPACK libraries. I am on Mac OS 11.0.1 and Xcode 12.2. I tried the following options:

1. I downloaded the R binary from CRAN. I tried to follow the instructions at https://cran.r-project.org/bin/macosx/RMacOSX-FAQ.html#Which-BLAS-is-used-and-how-can-it-be-changed_003f to switch the BLAS library. I do not see libRblas.vecLib.dylib in the folder so I cannot switch the BLAS library as given in the FAQ. I also cannot locate libRblas.vecLib.dylib on my system.

2. I tried to compile R from source. I used the following configuration options: --with-blas="-framework Accelerate”  and --with-lapack. I should have all requisite libraries. The compiled R does not use the vecLib BLAS and LAPACK (sessionInfo below signature). During configure, I noticed configure outputted:

checking for dgemm_ in -framework Accelerate… no

Is that perhaps why configure does not configure the compiled R to use the Accelerate (vecLib) framework? Any suggestions would be very welcome.

Thanks,
Anirban

sessionInfo()
R version 4.0.3 Patched (2020-11-20 r79454)
Platform: x86_64-apple-darwin20.1.0 (64-bit)
Running under: macOS Big Sur 10.16

Matrix products: default
LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_4.0.3 tools_4.0.3