Re: Python: Error loading shared library in Guix

[Ricardo Wurmus <rekado@elephly.net>]

Björn Höfling <bjoern.hoefling@bjoernhoefling.de> writes:

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

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=ctypes.CDLL(os.environ['GUIX_ENVIRONMENT']+'/lib/libz.so.1')"

-- 
Ricardo