[Numpy-discussion] linalg.svd not working?

Muhammad Alkarouri malkarouri@yahoo.co...
Wed May 6 02:56:48 CDT 2009

> Date: Tue, 5 May 2009 09:24:53 -0600
> From: Charles R Harris <charlesr.harris@gmail.com>
> This is almost always an ATLAS problem. Where did your
> ATLAS come from and
> what distro are you running?

You are probably right. I compiled and installed ATLAS from source. The distro is Redhat Enterprise Linux 4. I had to because the ones from the distro are compiled targetting 64-bit architecture. 

I largely followed the instructions at http://www.scipy.org/Installing_SciPy/Linux#head-eecf834fad12bf7a625752528547588a93f8263c . Built lapack 3.1.1, then copied the library to ATLAS and compiled per instructions. The compilers are CC='gcc -m32' version 3.4.4 (enforcing 32 bit compilation), g77 3.4.4. At various points I needed to define flags to ensure 32 bits, though not in numpy compilation. I have gfortran on the system but I didn't use it.

liblapack.so and other .so files are linked to libg2c.so not libgfortran.

ATLAS (3.8.3) was configured with the additional -32 flag as well. make check works nicely.

What should I check in order to find the error with ATLAS configuration and/or installation? Or is there a 32 bit version binary I can download/ use (even if only for testing)?


Muhammad Alkarouri


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