1#!/bin/bash 2# Copyright 2021 The gRPC Authors 3# 4# Licensed under the Apache License, Version 2.0 (the "License"); 5# you may not use this file except in compliance with the License. 6# You may obtain a copy of the License at 7# 8# http://www.apache.org/licenses/LICENSE-2.0 9# 10# Unless required by applicable law or agreed to in writing, software 11# distributed under the License is distributed on an "AS IS" BASIS, 12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13# See the License for the specific language governing permissions and 14# limitations under the License. 15 16set -ex 17 18# ARGUMENTS 19# $1 - python version in "3.X.Y" format 20# $2 - python tags (as in manylinx images) e.g. "/opt/python/cp37-cp37m" 21PYTHON_VERSION="$1" 22PYTHON_RELEASE="$2" 23PYTHON_PREFIX="$3" 24 25curl -O "https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_RELEASE}.tar.xz" 26tar -xf "Python-${PYTHON_RELEASE}.tar.xz" 27pushd "Python-${PYTHON_RELEASE}" 28 29# In this step, we are building python that can run on the architecture where the build runs (x64). 30# Since the CC, CXX and other env vars are set by default to point to the crosscompilation toolchain, 31# we explicitly unset them to end up with x64 python binaries. 32(unset AS AR CC CPP CXX LD && ./configure --prefix="${PYTHON_PREFIX}" && make -j 4 && make install) 33 34# When building the crosscompiled native extension, python will automatically add its include directory 35# that contains "Python.h" and other headers. But since we are going to be crosscompiling 36# the wheels, we need the pyconfig.h that corresponds to the target architecture. 37# Since pyconfig.h is the only generated header and python itself (once built) doesn't 38# really need this header anymore, we simply generate a new pyconfig.h using our crosscompilation 39# toolchain and overwrite the current ("wrong") version in the python's include directory. 40./configure && cp pyconfig.h "${PYTHON_PREFIX}"/include/python* 41 42popd 43# remove the build directory to decrease the overall docker image size 44rm -rf "Python-${PYTHON_VERSION}" 45 46# install cython and wheel 47"${PYTHON_PREFIX}/bin/python3" -m pip install --upgrade 'cython<4.0.0rc1' wheel 48