On Thursday 15 November 2007 19:58, SevenThunders wrote: > Alberto Ruiz-2 wrote: > > 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 > > Arrgh, the fix of using -fvia-C doesn't seem to be working for me. > You got my hopes up for a moment :). > I also am calling BLAS via C bindings. > I am going to try to distill my case down to the bare minimum if possible > and then provide an example. It may take a while.
Hmm, I' sorry... all seems to work well for me if I set -O -fvia-C for building the library and for final program compilation. But I will also try to find a minimum test case. In the meantime I have sent to Ian information to expose the problem with my library, although I know that such large amount of code will not be very helpful. Have you tested ghc-6.6.1 with -O -fasm? _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe