Thanks -- I have set SAGE_FORTRAN and SAGE_FORTRAN_LIB like this:

export SAGE_FORTRAN_LIB=/usr/lib/libgfortran.so.3
export SAGE_FORTRAN=/usr/bin/gfortran

and am rebuilding from scratch.  I'll post here how I get on.

John

2009/12/11 William Stein <wst...@gmail.com>:
> On Fri, Dec 11, 2009 at 8:14 AM, Tim Joseph Dumol <t...@timdumol.com> wrote:
>>
>>
>> On Sat, Dec 12, 2009 at 12:13 AM, Tim Joseph Dumol <t...@timdumol.com> wrote:
>>>
>>> You will want to replace /local/jec/sage-4.3.rc0/local/
>>> lib/gcc-lib/i686-pc-linux-gnu/4.0.3/libgcc_s.so.1 with your local version
>>> of libgcc_s.so. Alternatively, you can set $SAGE_FORTRAN and
>>> $SAGE_FORTRAN_LIB to your system's fortran compiler and library. This is
>>> caused by the fortran spkg building its own libgcc, iirc.
>>>
>>>
>>
>> As a note, setting $SAGE_FORTRAN and $SAGE_FORTRNA_LIB only fixes the
>> problem if the build is restarted from scratch.
>
> More precisely, you just have to force a rebuild of things that depend
> on fortran, which is I think the fortran spkg, scipy, lapack, and R.
>
> William
>
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