I am very pleased to inform that I was able to install luametatex on OpenBSD amd64 6.5. I fetched the install file on PRAGMA, followed the instructions and was able to compile a basic file with ltmx. I was also able to compile simple files for my pupils.
Unfortunately, compilation fails with more complex files (presentations), I’ll describe this on another mail.
Anyway, this is great, because OpenBSD 6.6 (released two days ago) ships texlive 2018, and having the \startxcolumn working will be really helpfull when designing key to symbols for my maps.
I'm now looking forward for the OpenBSD 6.6 ltmx binaries.
Thanks for all this great job,