Is Python 3.6.7 built with --enable-shared?

[sodre]

Issue:
I am trying to build the PL/Python library for PostgreSQL with the conda-forge's version of python but
the PostgreSQL's configure script errors out with

checking how to link an embedded Python application... -L/opt/conda/conda-bld/postgresql-split_1546631982179/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh/lib/python3.6/config-3.6m-x86_64-linux-gnu -lpython3.6m -lpthread -ldl  -lutil -lrt -lm       
configure: error: cannot build PL/Python because libpython is not a shared library
You might have to rebuild your Python installation.  Refer to the                                     
documentation for details.  Use --without-python to disable building                                  
PL/Python.

I dug further into the configure script and it is deciding whether Python was built with a shared library based on the value of ${PYTHON} -c "import distutils.sysconfig; print(distutils.sysconfig.get_config_vars().get('Py_ENABLE_SHARED',0))"


Environment (conda list):

$ conda list
# packages in environment at /opt/conda/conda-bld/postgresql-split_1546631982179/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh:
#
# Name                    Version                   Build  Channel
ca-certificates           2018.10.15           ha4d7672_0    conda-forge/label/gcc7
certifi                   2018.8.24             py36_1001    conda-forge/label/gcc7
icu                       58.2              hf484d3e_1000    conda-forge/label/gcc7
krb5                      1.16.2            hc83ff2d_1000    conda-forge/label/gcc7
libedit                   3.1.20170329      hf8c457e_1001    conda-forge/label/gcc7
libffi                    3.2.1             hf484d3e_1005    conda-forge/label/gcc7
libgcc-ng                 7.3.0                hdf63c60_0    conda-forge/label/gcc7
libiconv                  1.15              h14c3975_1003    conda-forge/label/gcc7
libpq                     9.6.11            h13b8bad_1000    local
libstdcxx-ng              7.3.0                hdf63c60_0    conda-forge/label/gcc7
libuuid                   2.32.1            h14c3975_1000    conda-forge/label/gcc7
libxml2                   2.9.8             h143f9aa_1005    conda-forge/label/gcc7
libxslt                   1.1.32            h4785a14_1002    conda-forge/label/gcc7
ncurses                   6.1               hf484d3e_1002    conda-forge/label/gcc7
openssl                   1.0.2p            h14c3975_1002    conda-forge/label/gcc7
pip                       18.0                  py36_1001    conda-forge/label/gcc7
postgresql                9.6.11            h66cca7a_1000    local
python                    3.6.7             hd21baee_1001    conda-forge/label/gcc7
readline                  7.0               hf8c457e_1001    conda-forge/label/gcc7
setuptools                40.4.0                py36_1000    conda-forge/label/gcc7
sqlite                    3.26.0            h67949de_1000    conda-forge/label/gcc7
tk                        8.6.9             h84994c4_1000    conda-forge/label/gcc7
tzcode                    2018g             h14c3975_1001    conda-forge/label/gcc7
wheel                     0.31.1                py36_1001    conda-forge/label/gcc7
xz                        5.2.4             h14c3975_1001    conda-forge/label/gcc7
zlib                      1.2.11            h14c3975_1003    conda-forge/label/gcc7

Details about conda and system ( conda info ):

$ conda info
$ conda info

     active environment : /opt/conda/conda-bld/postgresql-split_1546631982179/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh
    active env location : /opt/conda/conda-bld/postgresql-split_1546631982179/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh
            shell level : 3
       user config file : /home/conda/.condarc
 populated config files : /home/conda/.condarc
          conda version : 4.5.12
    conda-build version : 3.17.5
         python version : 3.6.7.final.0
       base environment : /opt/conda  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/linux-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/linux-64
                          https://repo.anaconda.com/pkgs/pro/noarch
          package cache : /opt/conda/pkgs
                          /home/conda/.conda/pkgs
       envs directories : /opt/conda/envs
                          /home/conda/.conda/envs
               platform : linux-64
             user-agent : conda/4.5.12 requests/2.20.1 CPython/3.6.7 Linux/2.6.32-696.20.1.el6.x86_64 centos/6.10 glibc/2.12
                UID:GID : 500:500
             netrc file : /home/conda/.netrc
           offline mode : False

[jjhelmus]

Python 3.6.7 is statically linked to libpython but the libpython.so libraries is also provided. It may be necessary to patch PL/Python's build system to ignore the value of Py_ENABLED_SHARED. For more discussion see #222.