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# Script to install FFTW from source (single precision only).
set -euo pipefail
pushd /tmp
echo "Downloading & unpacking FFTW ${FFTW_VERSION}"
curl https://fftw.org/pub/fftw/fftw-${FFTW_VERSION}.tar.gz --output fftw-${FFTW_VERSION}.tar.gz
tar xf fftw-${FFTW_VERSION}.tar.gz
pushd fftw-${FFTW_VERSION}
echo "Configuring, building & installing FFTW ${FFTW_VERSION} to ${FFTW_DIR}"
./configure --prefix=${FFTW_DIR} --enable-threads --enable-shared --enable-float
make -j $(nproc)
make install
popd
# Clean up to limit the size of the Docker image
echo "Cleaning up unnecessary files"
rm -r fftw-${FFTW_VERSION}
rm fftw-${FFTW_VERSION}.tar.gz
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