Tried building on FreeBSD and while it's successful, it crashes on execution.
I traced it down to all to file_exists(), which wants to call access() in libc.so.
Looks like the /usr/lib/libc.so file on FreeBSD 12.0 is a text file.
I think we need to look for /lib/libc.so.7 instead.
Try checking out my fork: https://github.com/shawnpringle/euphoria . I have just added a fix for this
GitHub