Compile @python 3.x for older systems

Makefile

SHELL=/bin/bash

#	= ^ . ^ =

APT_OPTS=-q=2 --assume-yes
APT_DEPS=build-essential \
  tcl-dev tk-dev \
  libpq-dev libffi-dev zlib1g-dev libreadline-dev libbz2-dev libncurses-dev libdbm-ocaml-dev libgdbm-dev liblzma-dev libsqlite3-dev uuid-dev libxml2-dev libxslt-dev \
  libssl-dev openssl \
  python3-pip python3-dev

VERSION=3.7
FULL_VERSION=${VERSION}.6
PKG=Python-${FULL_VERSION}
PKG_URL=https://www.python.org/ftp/python/${FULL_VERSION}/${PKG}.tgz
PREFIX=/usr/local
CONFIGURE_OPTS=--enable-shared --disable-profiling

all:	${PKG}.tgz ${PKG} build

everything:	apt all install ldconfig check

clean:	${PKG}
	$(MAKE) clean -C ${PKG}

dist-clean:
	rm -rf *.deb ${PKG}.tgz ${PKG} || true

# Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().
# Ubuntu Trusty OpenSSL version does not have it but xenial does!
# Thus we upgrade libssl only!

apt:
	printf "%s\n%s\n" 'DPkg::Progress-Fancy "1";' 'APT::Color "1";' | \
	sudo tee /etc/apt/apt.conf.d/99local
	sudo apt ${APT_OPTS} update
	sudo apt ${APT_OPTS}  install ${APT_DEPS}
	for PKG in libssl1.0.0_1.0.2g-1ubuntu4.15_amd64.deb libssl-dev_1.0.2g-1ubuntu4.15_amd64.deb ; \
	do \
	  wget -c -nv "http://security.ubuntu.com/ubuntu/pool/main/o/openssl/$$PKG" ; \
	  DEBIAN_FRONTEND=noninteractive dpkg -i $$PKG ; \
	  dpkg-deb -c $$PKG ; \
	done
	file -s /usr/lib/x86_64-linux-gnu/libcrypto.* /usr/lib/x86_64-linux-gnu/libssl.* /usr/lib/x86_64-linux-gnu/openssl-1.0.0/engines/*

${PKG}.tgz:
	wget -c -nv ${PKG_URL}

${PKG}:	${PKG}.tgz
	tar -xvvzf ${PKG}.tgz

build:	${PKG}/python

${PKG}/python:	${PKG}
	cd ${PKG} && \
	./configure --prefix=${PREFIX} ${CONFIGURE_OPTS} && \
	make

install:
	cd ${PKG} && \
	sudo -H make altinstall
	sudo -H pip3.7 install --upgrade pip

ldconfig:
	echo ${PREFIX}/lib | sudo tee -a /etc/ld.so.conf.d/python${VERSION}.conf
	sudo ldconfig

check:
	openssl version
	which python${VERSION}
	which python${VERSION} | xargs -r -t ldd
	env python${VERSION} --version
	python${VERSION} --version

vagrant:
	$@ halt
	$@ destroy -f
	$@ up --provision
	$@ ssh