Comment # 30 on bug 4393 from Michael Cronenworth

(In reply to Andrew Bauer from comment #29)
> Right, you guys are building against F27 now, which I have not tested yet.
> This does build against f24, f25, el6, & el7, but I image you will want this
> to build against rawhide. I need to spend some time to figure out how to
> resolve this build failure:
> 
[snip]
> /builddir/build/BUILD/ZoneMinder-1.30.4/src/zm_comms.h:98:20: error:
> '::readv' has not been declared
>      int nBytes = ::readv( mRd, iov, iovcnt );

They have the required include for readv()/writev() in a #if defined(BSD)
block. You can ask upstream to fix it and in the mean time patch it so #include
<sys/uio.h> is available for all systems.