[SciPy-user] installation on fedora core 4

[Ryan Krauss]

Thanks for this clarification Stephen.  It saves me a lot of pain
continuing to try and do what cannot currently be done.

As another potential work around, I have scipy installed and built
from source on a fedora core installation (with python 2.4 - I am
almost sure).  Can I in any way use it to get scipy working in fedora
core 4?

Ryan

On 10/10/05, Stephen Walton <stephen.walton at csun.edu> wrote:
> Ryan Krauss wrote:
>
> >Do I need to speficy a version of gcc other than 4.0?
> >
> This thread came up in scipy-dev, and I've posted here before, but to
> clarify again:
>
> In an all-default configuration, it is not presently possible to build a
> working scipy on Fedora Core 4, either old or new.  There is a bug in
> gfortran which causes it to mis-compile the i1mach, r1mach, and d1mach
> functions which are at the bottom of much of the Fortran code in scipy.
> If you use g77 instead by using the appropriate compatibility RPMs
> (compat-gcc-32-g77 and compat-libf2c-32), you'll find that gcc4 cannot
> link to libg2c because it isn't in a directory which gcc4 searches.  I
> haven't found a way of forcing a scipy build to use gcc 3.2.3 (the
> compatibility version which is part of FC4).
>
> The only feasible workaround I've found is to use g77 on FC4 to build
> scipy (and Numeric and numarray), and create symbolic links to libg2c.a
> and libg2c.so so that gcc4 can find them.  That is, do the following:
>
> ln -s /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/libg2c.so
> /usr/lib/gcc/i386-redhat-linux/4.0.1
> ln -s /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/libg2c.a
> /usr/lib/gcc/i386-redhat-linux/4.0.1
>
> This is not supported, use at your own risk, your mileage may vary,
> results are not guaranteed, pressure RedHat to release a gcc 4.0.2
> update for FC4 in which the gfortran bug is fixed.  Personally, I'm
> using Absoft Fortran on gcc4;  if you're an educational institution,
> Intel will let you download and use their Fortran compiler for free.
> Both seem to work fine with newscipy and FC4.
>
>
>
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