Hi Simon, Thanks for the info. I was totally unaware of ABI, vecLib, etc and that Apple has blas, lapack, etc. But after reading up on this and re-reading your email, I'm beginning to understand more about this.
So, I would like to first checkout vecLib. From what you say, would I have to do something like the following? ./configure --enable-BLAS-shlib --with-blas="-lBLAS" ... Is this also possible with LAPACK? tx again. cheers, roy On Mon, Sep 28, 2020 at 3:01 PM Simon Urbanek <simon.urba...@r-project.org> wrote: > Rollin, > > it has been several years since I last tested MKL, so take it with a grain > of salt, but in general you don't necessarily have to build R with MKL in > order to use it - you only need to use --enable-BLAS-shlib and link to any > ABI-compatible BLAS which can be vecLib as well. Then you can change the > link from vecLib to MKL in the BLAS stub. Note that we only need the C ABI, > there are wrappers vecLibg95f.* which re-map the F entry points to C entry > points as to avoid Fortran ABI issues thus you don't care about the > Fortran. However, historically, MKL has not been much more performant than > vecLib so it's unclear if it is worth the hassle. As with any accelerated > BLAS, note that this may have effects on results in R. > > Cheers, > Simon > > > > > On 28/09/2020, at 7:07 PM, rollin <rollinfor...@gmail.com> wrote: > > > > I wanted to build R from source on macos (10.15.5) so I could include > > Intel's MKL. So I first looked at building R from source without MKL. > > > > From the installation doc, I modified config.site to have the following: > > > > CC=clang > > OBJC=$CC > > FC=/usr/local/bin/gfortran > > CXX=clang++ > > > > > > I then ran configuration via the command: > > > > ./configure -C --enable-R-shlib --enable-memory-profiling > > --x-includes=/opt/X11/include --x-libraries=/opt/X11/lib > > > PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig > > > > > > And received the following information and error: > > > > checking if bzip2 version >= 1.0.6... no > > checking whether bzip2 support suffices... configure: error: bzip2 > library > > and headers are required > > > > > > By looking at the log, I saw a compiler error due to an implicit > function. > > I then made the following change in config.site: > > > > CFLAGS='-Wno-implicit-function-declaration -g -O2'' > > > > > > And configure now ran without errors. > > > > However, when I looked at configuring to use MKL, I discovered that MKL > on > > macos does not support gnu fortran so, unless I purchase Intel's Fortran > > compiler, it looks like I'm sol. > > > > Has anyone built R with MKL on macos (10.15)? In any event, I wanted to > at > > least note the issue and work around I encountered when building R on > > macos with clang/xcode. > > > > [[alternative HTML version deleted]] > > > > _______________________________________________ > > R-SIG-Mac mailing list > > R-SIG-Mac@r-project.org > > https://stat.ethz.ch/mailman/listinfo/r-sig-mac > > [[alternative HTML version deleted]] _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
