The short version of the question - does anyone know what build process is used
to generate the libRblas.vecLib.dylib that is included in
/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/lib by
R-4.3.1-arm64.pkg? I have not been able to find any direct references in the R
source files or the build scripts on svn.r-project.org/R-dev-web/
<http://svn.r-project.org/R-dev-web/>.
The longer version with context - I was recently interested in experimenting
with the Accelerate framework / vecLib. Using CRAN's binary pkg installer
libRblas.vecLib.dylib is provided and it is straightforward to change the
libRblas.dylib symlink and get everything working.
However, I've typically used homebrew's formula distribution to install R on my
systems which compiles R from source. The maintainers have currently opted to
compile and directly link to openblas which prevents the swapping of blas
engines via changing symlinks. Changing back to configuring / compiling with
--enable-BLAS-shlib is easy enough but since Apple has now changed how
framework dylibs are accessed it seems like something along the lines of
libRblas.vecLib.dylib is needed, I just can't for the life of me figure out how
to create it / where it comes from at the moment. An additional wrinkle is that
for homerbrew fomulae everything must be compiled from source so the dylib
can't just be bundled or downloaded.
Thanks,
-Colin
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