OpenBSD wrapper for Linux/FreeBSD sendfile?

[Steve Williams]

Hi,

I'm trying to compile a Linux/FreeBSD application (zoneminder) under 
OpenBSD 7.0.

I'm slowly working through it but have gotten stuck at the point where 
it has a dependency on sendfile(2) which OpenBSD doesn't have.

Doing some research, I found one reference that sosplice(2) might be 
able to be used in place of sendfile.  Elsewhere, I have found reference 
to a "simple-sendfile" package, but that doesn't seem to exist.

Is this an issue people have already resolved with other ports?  Or is 
it a deal breaker?

I guess the devil is in the details, but I thought I'd reach out here 
first in case there's already a good solution to this.

Thanks,
Steve Williams