See:
https://github.com/lukas-w/pdfium-build
https://blog.openinworld.com/2017/11/pharo-pdf-part-1/
Make sure you are in the docker group, then enter:
./build.sh
Should (eventually) generate:
-rw-r--r-- 1 john lxd 25934631 Mar 30 17:18 /home/john/GIT/build-pdfium/data/package/libpdfium-master-linux-x64.tar.gz
For a native build:
cd data ./build-pdfium.sh ./package.sh
To make a tar file in data/package. Seems to work on 18.10.