Just out of curiosity, what LAPACK and BLAS implementation is causing
problems? I have no idea if there is anything related, but I have
been having similar sounding problems with python when using the
latest ATLAS library on 64 bit core 2 machines. I am beginning to
suspect that there may be something wrong in ATLAS, but I don't have
any definite evidence yet because the bug is also rather elusive here.
Michael.
On 16 Nov 2007, at 2:13 AM, Simon Peyton-Jones wrote:
Alberto, SevenThunders, Joel,
Glark. This is not good. Thank you for being so polite about it.
And thanks for working on a reproducible test case -- without that
we are 100% stuck.
We did fix one just-possibly-related bug in 6.8 recently, which
concerned the use of {-# UNPACK #-} on strict Double-sized fields
in fixed, top-level data structures. I think it was only wrong on a
64-bit machine.
http://www.haskell.org/pipermail/glasgow-haskell-users/2007-
November/013454.html
What is the word size on your machine?
But that may well be a complete red herring. We'll stand by.
Simon
| -----Original Message-----
| From: [EMAIL PROTECTED] [mailto:haskell-cafe-
[EMAIL PROTECTED] On Behalf Of Alberto Ruiz
| Sent: 15 November 2007 08:44
| To: haskell-cafe@haskell.org
| Subject: Re: [Haskell-cafe] ghc 6.8.1 bug?
|
| Hello,
|
| I have had exactly the same problem with my bindings to GSL, BLAS
and LAPACK.
| The foreign functions (!) randomly (but very frequently) produced
NaN with
| ghc-6.8.1 -O. As usual, I first thought that I had a subtle bug
related to
| the foreign pointers, but after a lot of refactoring,
experiments, and
| tracing everything, I'm reasonably sure that memory is safely
used. What I
| have found is that the same errors can be reproduced on ghc-6.6.1
| with -O -fasm. So I tried -O -fvia-C on ghc-6.8.1 (which now it
is not the
| default) and apparently everything works well. So it seems that
now the ffi
| requires and additional and explicit -fvia-C. In any case I don't
know
| why -fasm produces those strange NaN in precompiled foreign
functions...
|
| Alberto
|
| On Thursday 15 November 2007 09:05, SevenThunders wrote:
| > The good news is that my code compiles without error and much
faster under
| > ghc 6.8.1.
| > The bad news is that there appear to be subtle bugs that did
not occur when
| > I compiled things under
| > 6.6.1. One issue is that my code is somewhat complex and links
into a C
| > library as well.
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