Hi David, On Saturday 25 November 2006 03:57, David Strozzi wrote:
There's a small problem with the linear algebra library BLAS and LAPACK in opensuse. These are Fortran libraries. I (and others) have trouble using the libraries with SciPy (python scientific computing package). The problem seems to be that different Fortran compilers use different symbol names for some output routines. When one compiles scipy, there are some Fortran routines that get compiled, I think with g77 by default (maybe not). You can compile and install scipy, but when you try importing it in python you get an error of undefined symbol _gfortran_st_write in the LAPACK library.
Can you provide a small python script that shows the bug? Can you give some more information about your used SuSE Version and architecture?
I have the most recent blas and lapack opensuse builds (940). The official suse-type webpage I got these from say they were compiled with egcs, which is a. wrong (egcs merged back into gcc a long time ago) and b. ill-defined (since g77 and gfortran are both part of gcc).
Which package exactly are you using? One of those: http://software.opensuse.org/download/science/SUSE_Linux_10.1/x86_64/
As you search the web, you see that it's part of the lore that "Suse's BLAS is buggy, you have to compile yourself." Not good for Suse!
Please provide URL's it's much easier to track them.
While I'm on it, it's not clear what implementation of BLAS opensuse uses. My guess is it's the reference implementation from lapack's page on netlib, which is not optimized. Better ones exist, like gotoBLAS. Maybe that can be made a suse package?
http://www.tacc.utexas.edu/resources/software/#blas The package is not accessable from that page without login. Is there a public place to get it?
At the least it would help if it were spelled out exactly which Fortran compiler was used to make opensuse's blas. If they can be compiled to allow multiple Fortran compilers to play nicely with them, even better.
?? Regards Werner --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-buildservice+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-buildservice+help@opensuse.org