Allow to build with the PyPI package "clang" instead of "libclang". 1. It seems to be maintained. 2. In the FreeBSD base system there is no pre-built libclang.so. If you need this library you have to install llvm from ports additionally. 2. On FreeBSD there is no pre-built wheel "libclang" with a packaged libclang.so.

#!/bin/bash
set -x
BROTLI_TAG=${BROTLI_TAG:-dev/null}
BROTLI_TAG="${BROTLI_TAG//'/'/%2F}" # Escaping for tag names with slash (e.g. "dev/null")
ARCHIVE=testdata.txz
curl -L https://github.com/google/brotli/releases/download/${BROTLI_TAG}/${ARCHIVE} -o ${ARCHIVE}
tar xvfJ ${ARCHIVE}