Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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#!/bin/bash
#
# Builds protobuf python including the C++ extension with aarch64 crosscompiler.
# The outputs of this script are laid out so that we can later test them under an aarch64 emulator.
# NOTE: This script is expected to run under the dockcross/manylinux2014-aarch64 docker image.
set -ex
PYTHON="/opt/python/cp38-cp38/bin/python"
# Initialize any submodules.
git submodule update --init --recursive
# Build protoc and libprotobuf
cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -Dprotobuf_WITH_ZLIB=0 .
make -j8
# Copy lib files to the expected location.
mkdir -p src/.libs
ln -f *.a src/.libs/
# create a simple shell wrapper that runs crosscompiled protoc under qemu
echo '#!/bin/bash' >protoc_qemu_wrapper.sh
echo 'exec qemu-aarch64 "../protoc" "$@"' >>protoc_qemu_wrapper.sh
chmod ugo+x protoc_qemu_wrapper.sh
# PROTOC variable is by build_py step that runs under ./python directory
export PROTOC=../protoc_qemu_wrapper.sh
pushd python
# NOTE: this step will use protoc_qemu_wrapper.sh to generate protobuf files.
${PYTHON} setup.py build_py
# when crosscompiling for aarch64, --plat-name needs to be set explicitly
# to end up with correctly named wheel file
# the value should be manylinuxABC_ARCH and dockcross docker image
# conveniently provides the value in the AUDITWHEEL_PLAT env
plat_name_flag="--plat-name=$AUDITWHEEL_PLAT"
# override the value of EXT_SUFFIX to make sure the crosscompiled .so files in the wheel have the correct filename suffix
export PROTOCOL_BUFFERS_OVERRIDE_EXT_SUFFIX="$(${PYTHON} -c 'import sysconfig; print(sysconfig.get_config_var("EXT_SUFFIX").replace("-x86_64-linux-gnu.so", "-aarch64-linux-gnu.so"))')"
# Build the python extension inplace to be able to python unittests later
${PYTHON} setup.py build_ext --cpp_implementation --compile_static_extension --inplace
# Build the binary wheel (to check it with auditwheel)
${PYTHON} setup.py bdist_wheel --cpp_implementation --compile_static_extension $plat_name_flag