Installing Python from sources

install-python.sh

#!/usr/bin/bash

CC=x86_64-linux-gnu-gcc
CFLAGS=-g -fstack-protector-strong -Wformat -Werror=format-security
LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2
CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2

configure --enable-optimizations --with-ensurepip=install --enable-shared --prefix=/usr/local/ --enable-loadable-sqlite-extensions --with-dbmliborder=bdb:gdbm --with-computed-gotos --with-system-expat --with-system-ffi
make # -j 4
make altinstall

list-config-args.py

#!/usr/bin/env python3

import sysconfig

# list flags used during compilation of Python
print(sysconfig.get_config_var('CONFIG_ARGS'))

usr-local.conf

# Ensure the path '/usr/local/lib' is present in config files 
# inside the '/etc/ld.so.conf.d' dir.
# If no file contain the path, create a file, e.g. 'usr-local.conf', and put a line inside it:

/usr/local/lib