From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <rekado@elephly.net>
Subject: Re: Python: Error loading shared library in Guix
Date: Tue, 19 Mar 2019 15:52:41 +0100
Message-ID: <8736nincg6.fsf@elephly.net>
References: <20190319152519.1caef235@alma-ubu>
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To: =?utf-8?Q?Bj=C3=B6rn_H=C3=B6fling?= <bjoern.hoefling@bjoernhoefling.de>
Cc: guix-devel <guix-devel@gnu.org>


Bj=C3=B6rn H=C3=B6fling <bjoern.hoefling@bjoernhoefling.de> writes:

> [env]# ls $GUIX_ENVIRONMENT/lib
> libXss.a   libXss.so	libXss.so.1.0.0  libbfd.la     libopcodes.la	libpyth=
on2.7.so.1.0  libz.so.1	     pkgconfig
> libXss.la  libXss.so.1	libbfd.a	 libopcodes.a  libpython2.7.so	libz.so		 =
    libz.so.1.2.11  python2.7
>
> [env]# python
> Python 2.7.15 (default, Jan  1 1970, 00:00:01)=20
> [GCC 5.5.0] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import ctypes;
>>>> from ctypes import *;
>>>> libc=3DCDLL("libc.so.6");
>>>> libc
> <CDLL 'libc.so.6', handle 7fac69a4b550 at 7fac69733110>
>>>> libz=3DCDLL("libz.so.1");
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/gnu/store/aws3fsg614lqr392y5pp9w65dy7gmvlx-python2-2.7.15/lib/py=
thon2.7/ctypes/__init__.py", line 366, in __init__
>     self._handle =3D _dlopen(self._name, mode)
> OSError: libz.so.1: cannot open shared object file: No such file or direc=
tory

Using the full file name would work, for example:

./pre-inst-env guix environment --ad-hoc python zlib -- \
    python3 -c "import os; import ctypes; libz=3Dctypes.CDLL(os.environ['GU=
IX_ENVIRONMENT']+'/lib/libz.so.1')"

--=20
Ricardo