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Problems installing Python 3 with –enable-shared

HomeCategory: stackoverflowProblems installing Python 3 with –enable-shared
Avatarjohn asked 4 months ago

Problem

I’m trying to install Python 3 with the –enable-shared option. Installation “succeeds” but the resulting Python is not runnable. Trying to run Python after installation gives the following error:

$ /opt/python3/bin/python3.5
/opt/python3/bin/python3.5: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory

Background

The OS is Debian (squeeze), and has a previous installation of Python 2.6, which is necessary to retain because other code relies on it, and Apache 2.2. Ultimately what I’m trying to do is set up Django to run on Apache, meaning I’m trying to install mod_wsgi (or mod_wsgi-express), which requires shared libraries. I have already tried to install mod_wsgi without using --enable-shared in the Python installation, and have gotten… well, the same thing, but this time from the mod_wsgi installer (and from pip install mod_wsgi, which I also tried): /opt/python3/bin/python3.5: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory.

Trace

Starting from an installation as described in Background above, here is the minimum list of commands I’ve executed that produce the error above (with verbosity removed).

user@server:~$ wget https://www.python.org/ftp/python/3.5.1/Python-3.5.1.tgz
user@server:~$ tar -zxvf Python-3.5.1.tgz
user@server:~$ cd Python-3.5.1
user@server:~/Python-3.5.1$ ./configure --prefix=/opt/python3 --enable-shared
user@server:~/Python-3.5.1$ make && sudo make install
(... appears to install correctly)

user@server:~/Python-3.5.1$ /opt/python3/bin/python3.5
/opt/python3/bin/python3.5: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory

I have also tried this with LD_RUN_PATH set as described in the solution to this other question, with the same results:

user@server:~/Python-3.5.1$ sudo make distclean
user@server:~/Python-3.5.1$ ./configure --prefix=/opt/python3 --enable-shared
user@server:~/Python-3.5.1$ LD_RUN_PATH=/usr/local/lib make
user@server:~/Python-3.5.1$ sudo make install
user@server:~/Python-3.5.1$ /opt/python3/bin/python3.5
/opt/python3/bin/python3.5: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory

I have also tried this with Python 3.4, with the same results. I have not tried this with Python 2, because I do not want future development to be limited to Python 2.7 (therefore even a successful installation would not satisfy my requirements). I’m also assuming the attempt would not provide any new or useful information.

1 Answers
Best Answer
AvatarMannu answered 4 months ago
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