| #!/bin/bash |
| # Copyright 2021 The gRPC Authors |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| set -ex |
| |
| # ARGUMENTS |
| # $1 - python version in "3.X.Y" format |
| # $2 - python tags (as in manylinx images) e.g. "/opt/python/cp37-cp37m" |
| PYTHON_VERSION="$1" |
| PYTHON_PREFIX="$2" |
| |
| curl -O "https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tar.xz" |
| tar -xf "Python-${PYTHON_VERSION}.tar.xz" |
| pushd "Python-${PYTHON_VERSION}" |
| |
| # In this step, we are building python that can run on the architecture where the build runs (x64). |
| # Since the CC, CXX and other env vars are set by default to point to the crosscompilation toolchain, |
| # we explicitly unset them to end up with x64 python binaries. |
| (unset AS AR CC CPP CXX LD && ./configure --prefix="${PYTHON_PREFIX}" && make -j 4 && make install) |
| |
| # When building the crosscompiled native extension, python will automatically add its include directory |
| # that contains "Python.h" and other headers. But since we are going to be crosscompiling |
| # the wheels, we need the pyconfig.h that corresponds to the target architecture. |
| # Since pyconfig.h is the only generated header and python itself (once built) doesn't |
| # really need this header anymore, we simply generate a new pyconfig.h using our crosscompilation |
| # toolchain and overwrite the current ("wrong") version in the python's include directory. |
| ./configure && cp pyconfig.h "${PYTHON_PREFIX}"/include/python* |
| |
| popd |
| # remove the build directory to decrease the overall docker image size |
| rm -rf "Python-${PYTHON_VERSION}" |
| |
| # install cython and wheel |
| "${PYTHON_PREFIX}/bin/pip3" install --upgrade cython wheel |
