numpy would not load: libgcc_s vs. libgfortran

[Olivier Duchateau]

On Mon, 04 Jan 2016 11:44:24 -0500
"Mikhail T." <mi+thun at aldan.algebra.com> wrote:

> Hi!
> 
> I built py-numpy only a few weeks ago with default config options (I
> think). I'm trying to port some numpy-using software now and its
> self-tests fail with the following error:
> 
>     ...
>         import numpy
>       File "/opt/lib/python2.7/site-packages/numpy/__init__.py", line
>     180, in <module>
>         from . import add_newdocs
>       File "/opt/lib/python2.7/site-packages/numpy/add_newdocs.py", line
>     13, in <module>
>         from numpy.lib import add_newdoc
>       File "/opt/lib/python2.7/site-packages/numpy/lib/__init__.py",
>     line 8, in <module>
>         from .type_check import *
>       File "/opt/lib/python2.7/site-packages/numpy/lib/type_check.py",
>     line 11, in <module>
>         import numpy.core.numeric as _nx
>       File "/opt/lib/python2.7/site-packages/numpy/core/__init__.py",
>     line 14, in <module>
>         from . import multiarray
>     *ImportError: /lib/libgcc_s.so.1: version GCC_4.6.0 required by
>     /opt/lib/gcc48/libgfortran.so.3 not found*
> 
> I checked all of the shared objects installed by numpy with ldd. All
> report properly using the /opt/lib/gcc48/libgcc_s.so.1 (installed by the
> gcc48 port) rather than the stock /lib/libgcc_s.so.1. For example:
> 
>     /opt/lib/python2.7/site-packages/numpy/core/multiarray.so:
>             libblas.so.2 => /opt/lib/libblas.so.2 (0x801780000)
>             libm.so.5 => /lib/libm.so.5 (0x8019d2000)
>             libpython2.7.so.1 => /opt/lib/libpython2.7.so.1 (0x801bfb000)
>             libc.so.7 => /lib/libc.so.7 (0x800820000)
>             libgfortran.so.3 => /opt/lib/gcc48/libgfortran.so.3
>     (0x801fbc000)
>     *        libgcc_s.so.1 => /opt/lib/gcc48/libgcc_s.so.1 (0x8022d2000)*
>             libquadmath.so.0 => /opt/lib/gcc48/libquadmath.so.0
>     (0x8024e8000)
>             libthr.so.3 => /lib/libthr.so.3 (0x802723000)
>             libintl.so.8 => /opt/lib/libintl.so.8 (0x802948000)
>             libutil.so.9 => /lib/libutil.so.9 (0x802b53000)
> 
> And yet, the error occurs...
> 
> Has anyone else seen this? Thanks! Yours,
> 
>     -mi
> 
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Hi Mikhail,

Can you post the complete backtrace?

I already encountered this error, and if often due to a wrong python import (cycling import).

-- 
olivier