If you are building your own Python make sure you read:

* http://blog.dscpl.com.au/2015/06/installing-custom-python-version-into.html 
<http://blog.dscpl.com.au/2015/06/installing-custom-python-version-into.html>

Ignore that it talks about docker.

In the past at least, Python out of the box with no configuration doesn't build 
how you would want it to. Not sure if same is still the case.

Also be wary of using pyenv to create Python installations, it has a history of 
not building things in a way that works with embedded systems.

> On 19 Jun 2022, at 2:52 am, Lou King <[email protected]> wrote:
> 
> On the off chance, I followed 
> https://modwsgi.readthedocs.io/en/master/user-guides/installation-issues.html#undefined-forkpty-on-fedora-7
>  
> <https://modwsgi.readthedocs.io/en/master/user-guides/installation-issues.html#undefined-forkpty-on-fedora-7>
>  and edited envvars as follows
> 
> LD_PRELOAD=/usr/lib64/libutil.so
> export LD_PRELOAD
> 
> now I see 
> 
> $ sudo /etc/mod_wsgi-express/sandbox.routes.loutilities.com/apachectl 
> <http://sandbox.routes.loutilities.com/apachectl> start
> httpd (mod_wsgi-express): Syntax error on line 163 of 
> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf: 
> <http://sandbox.routes.loutilities.com/httpd.conf:>Cannot load 
> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so
>  
> <http://sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so>
>  into server: 
> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so:
>  
> <http://sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so:>
>  undefined symbol: sincos
> 
> I see something at 
> https://stackoverflow.com/questions/23719304/error-on-apache2-restart-using-mod-python-undefined-symbol-sincos
>  
> <https://stackoverflow.com/questions/23719304/error-on-apache2-restart-using-mod-python-undefined-symbol-sincos>
>  and wondering if I should have done anything differently while building 
> python?
> On Saturday, June 18, 2022 at 12:27:25 PM UTC-4 Lou King wrote:
> I built python 3.9.13, which uses the system openssl (same as apache, I 
> assue). Now I see the following
> 
> $ sudo /etc/mod_wsgi-express/sandbox.routes.loutilities.com/apachectl 
> <http://sandbox.routes.loutilities.com/apachectl> start
> httpd (mod_wsgi-express): Syntax error on line 163 of 
> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf 
> <http://sandbox.routes.loutilities.com/httpd.conf>: Cannot load 
> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so
>  
> <http://sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so>
>  into server: 
> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so
>  
> <http://sandbox.routes.loutilities.com/venv/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39.cpython-39-x86_64-linux-gnu.so>:
>  undefined symbol: forkpty
> 
> On Thursday, June 16, 2022 at 5:18:16 PM UTC-4 Lou King wrote:
> Wow, thanks. This is great information.
> 
> I think this means I can't go to python 3.10 because as I understand, it 
> requires an openssl upgrade. 
> 
> On Thu, Jun 16, 2022, 4:49 PM Graham Dumpleton <[email protected] <>> 
> wrote:
> Your Apache installation and Python installations are compiled against 
> different SSL library versions. You can't have this, they need to match. You 
> would need to build any custom Python version against same system SSL 
> libraries that system Apache is using.
> 
>> On 8 Jun 2022, at 3:50 am, Lou King <[email protected] <>> wrote:
>> 
>> FWIW, I tried rerunning mod_wsgi-express setup-server, and get the same 
>> results
>> 
>> $ sudo LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/custom-openssl/lib 
>> /root/bin/init-mod_wsgi-express runningroutes sandbox.routes.loutilities.com 
>> <http://sandbox.routes.loutilities.com/> routesmgr routesmgr 8002
>> Server URL         : http://proxysvr.loutilities.com:8002/ 
>> <http://proxysvr.loutilities.com:8002/>
>> Server Root        : /etc/mod_wsgi-express/sandbox.routes.loutilities.com 
>> <http://sandbox.routes.loutilities.com/>
>> Server Conf        : 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf 
>> <http://sandbox.routes.loutilities.com/httpd.conf>
>> Error Log File     : 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/error_log 
>> <http://sandbox.routes.loutilities.com/error_log> (warn)
>> Rewrite Rules      : 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/rewrite.conf 
>> <http://sandbox.routes.loutilities.com/rewrite.conf>
>> Environ Variables  : 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/envvars 
>> <http://sandbox.routes.loutilities.com/envvars>
>> Control Script     : 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/apachectl 
>> <http://sandbox.routes.loutilities.com/apachectl>
>> Operating Mode     : daemon
>> Request Capacity   : 5 (1 process * 5 threads)
>> Request Timeout    : 60 (seconds)
>> Startup Timeout    : 15 (seconds)
>> Queue Backlog      : 100 (connections)
>> Queue Timeout      : 45 (seconds)
>> Server Capacity    : 20 (event/worker), 20 (prefork)
>> Server Backlog     : 500 (connections)
>> Locale Setting     : en_US.UTF-8
>> $ sudo /etc/mod_wsgi-express/sandbox.routes.loutilities.com/apachectl 
>> <http://sandbox.routes.loutilities.com/apachectl> start
>> httpd (mod_wsgi-express): Syntax error on line 163 of 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf: 
>> <http://sandbox.routes.loutilities.com/httpd.conf:>Cannot load 
>> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so>
>>  into server: 
>> /var/www/sandbox.routes.loutilities.com/venv/lib/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so:
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so:>
>>  undefined symbol: GENERAL_NAME_free
>> 
>> where
>> 
>> $ sudo cat /root/bin/init-mod_wsgi-express
>> #!/bin/bash
>> if [[ $# -lt 5 ]] ; then
>>    echo "usage:"
>>    echo "    init-mod_wsgi-express project servername user group port"
>>    exit 0
>> fi
>> 
>> source /var/www/$2/venv/bin/activate
>> mod_wsgi-express setup-server --server-name proxysvr.loutilities.com 
>> <http://proxysvr.loutilities.com/> --port $5 --user $3 --group $4 
>> /var/www/$2/$1/$1/$1.wsgi --working-directory /var/www/$2/$1/$1/ 
>> --server-root /etc/mod_wsgi-express/$2
>> deactivate
>> 
>> 
>> 
>> On Monday, June 6, 2022 at 6:43:46 AM UTC-4 Lou King wrote:
>> I'm getting an error trying to start a service which uses mod_wsgi 4.9.1 in 
>> a virtual environment.
>> 
>> On my centos 7 system, I compiled python 3.10, which is altinstalled to 
>> /usr/local/bin/python3.10
>> 
>> I have a virtualenv, but may have initially built mod_wsgi with an earlier 
>> version of python 3.10 (I was having trouble getting it to build correctly). 
>> However, my last attempt I used 
>> 
>> pip install --ignore-installed --no-cache-dir mod_wsgi==4.9.1 --no-binary 
>> mod_wsgi
>> 
>> to try to get it to build with the latest python3.10 (I tried several pip 
>> installs, starting with just --no-cache-dir)
>> 
>> Note I am trying to upgrade several applications to python3.10, so for the 
>> most part I have left the original files created by mod_wsgi-express 
>> setup-serveralone under the centos7 yum installed python 3.6, mod_wsgi 4.7.0
>> 
>> I've hand-edited 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf 
>> <http://sandbox.routes.loutilities.com/httpd.conf> as follows
>>     159c159
>>     < LoadModule wsgi_module 
>> '/var/www/sandbox.routes.loutilities.com/venv/lib64/python3.6/site-packages/mod_wsgi/server/mod_wsgi-py36.cpython-36m-x86_64-linux-gnu.so
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib64/python3.6/site-packages/mod_wsgi/server/mod_wsgi-py36.cpython-36m-x86_64-linux-gnu.so>'
>>     ---
>>     > LoadModule wsgi_module 
>> '/var/www/sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so>'
>> 
>> I'm not sure this is sufficient to "shift" to the new python version, but I 
>> was hoping to touch as little as possible rather than setting everything up 
>> again for 8 applications.
>> I see the following in journalctl when I try to start the service.
>> 
>> Jun 05 08:55:02 loutility-server-digitalocean apachectl[23870]: httpd 
>> (mod_wsgi-express): Syntax error on line 159 of 
>> /etc/mod_wsgi-express/sandbox.routes.loutilities.com/httpd.conf 
>> <http://sandbox.routes.loutilities.com/httpd.conf>: Cannot load 
>> /var/www/sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so>
>>  into server: 
>> /var/www/sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so
>>  
>> <http://sandbox.routes.loutilities.com/venv/lib64/python3.10/site-packages/mod_wsgi/server/mod_wsgi-py310.cpython-310-x86_64-linux-gnu.so>:
>>  undefined symbol: GENERAL_NAME_free
>> 
>> I notice the following from the build directory
>> 
>> Python-3.10.4]$ grep -R GENERAL_NAME_free . ./Modules/_ssl.c: 
>> sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free); 
>> Binary file ./Modules/_ssl.o matches 
>> Binary file ./python matches 
>> Binary file ./libpython3.10.a matches Binary file ./Programs/_testembed 
>> matches
>> 
>> and libpython3.10.a is in 
>> /usr/local/lib/python3.10/config-3.10-x86_64-linux-gnu:
>> 
>> $ find /usr/local/lib -name libpython3.10.a
>> /usr/local/lib/libpython3.10.a
>> /usr/local/lib/python3.10/config-3.10-x86_64-linux-gnu/libpython3.10.a
>> 
>> What other debugging steps should I take? Do I need to re-run 
>> mod_wsgi-express? setup-server. Is mod_wsgi not being built correctly? Or 
>> something else?
>> 
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