ports: Add python3 port

ports/python3/build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash ../install.sh
+
+NAME='python'
+VERSION='3.13.3'
+DOWNLOAD_URL="https://www.python.org/ftp/python/$VERSION/Python-$VERSION.tar.xz#40f868bcbdeb8149a3149580bb9bfd407b3321cd48f0be631af955ac92c0e041"
+TAR_CONTENT="Python-$VERSION"
+DEPENDENCIES=('ncurses' 'zlib' 'openssl')
+CONFIG_SUB=('config.sub')
+CONFIGURE_OPTIONS=(
+	"--build=$(uname -m)-pc-linux-gnu"
+	"--with-build-python=python3.13"
+	'--without-ensurepip'
+	'--disable-ipv6'
+	'--disable-test-modules'
+	'--enable-shared'
+	'ac_cv_file__dev_ptmx=no'
+	'ac_cv_file__dev_ptc=no'
+)
+
+pre_configure() {
+	if ! command -v python3.13 &>/dev/null ; then
+		echo "You need to have python3.13 installed on your host machine" >&2
+		exit 1
+	fi
+}