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#!/bin/bash -eux
#
# This script should be called by `cibuildwheel` in the `before-build` stage.
#
# This script will first install the latest `numpy` 1.x version (2.x is not
# supported yet). Next the Boost Python libraries will be built from source,
# including the bindings to NumPy. The Boost sources must be in the directory
# `${BOOST_BUILD_DIR}/boost`. The libraries will be installed in the directory
# `${BOOST_INSTALL_DIR}`. Both environment variables must have been set.
# Ensure we start with a clean slate
function cleanup
{
rm -rf "${BOOST_BUILD_DIR}/boost/bin.v2"
rm -rf "${BOOST_INSTALL_DIR}"
}
# Install latest numpy 1.x; we do not yet support numpy 2.x
function install_numpy
{
pip install 'numpy'
}
# Build the Boost Python libraries
function build_boost_python
{
nproc=$(python -c 'import multiprocessing as mp; print(mp.cpu_count())')
inc_dir=$(python -c 'import sysconfig as sc; print(sc.get_path("include"))')
cd "${BOOST_BUILD_DIR}/boost"
./bootstrap.sh \
--prefix="${BOOST_INSTALL_DIR}" \
--with-toolset=gcc \
--with-libraries=python
./b2 -j"${nproc}" -d0 \
cxxflags="-fPIC -I${inc_dir}" \
link=static,shared \
install
}
set -o pipefail
cleanup
install_numpy
build_boost_python
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