I recently found out that you can setenv BLAS_VERSION blah.so on linux
and Matlab will use blah.so for the BLAS functions (which speeds up
things dramatically when using Intel's blas instead of mathworks's).
Hoping to recreate this glorious discovery on my Mac I stumbled on how
to get vecLib to become useful. The vecLib file in the frameworks
directory is of mysterious format to me and I'm not quite sure how to
make it a dynamic library (or whatever Matlab on OS X might expect
That is an excellent find. If you find a direct answer, please let me
know.
The only way I see to do it is to compile ATLAS which is optimized for
Altivec. It says it provides a full BLAS implementation.
<http://math-atlas.sourceforge.net/>
I downloaded the binary and did:
% setenv BLAS_VERSION dir/libcblas.a
% matlab
dyld: /Applications/MATLAB6p5p1/bin/mac/MATLAB malformed library:
/Users/powellb/Download/OSX_PPCG4AltiVec_2/lib/libcblas.a (not a Mach-O
file, bad magic number)
Trace/BPT trap
So, setting the variable does work on MacOSX, I realize was pointing to
a static (rather than dynamic library) so it failed, but, it appears
matlab will work that way.
I don't have the time to compile ATLAS as a .so right now, but, if you
get it working, please share!
Cheers,
Brian
