[Numpy-discussion] compiling ATLAS for numpy

Emanuele Olivetti olivetti at itc.it
Thu Sep 28 03:20:48 CDT 2006

Ops, sorry for the misleding subject: I wrote ATLAS but I meant LAPACK :)

Emanuele Olivetti wrote:
> Hi,
> I'm installing numpy on a 2 cpus intel pentium 4 Linux box. I'm installing BLAS and
> LAPACK from sources too and I need to tune compiler flags. Here is the question: which
> are the proper flags for compiling LAPACK? Inside lapack.tgz make.inc.LINUX says:
>             OPTS     = -funroll-all-loops -fno-f2c -O3
> instead on scipy.org[0] it's suggested:
>             OPTS = -O2

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