I'd go with linuxcnc-FLAVOUR.deb namings
We can have linuxcnc-rtai that provides: linuxcnc, so that it can upgrade
older versions.
I think there are also meta packages possible which pull the needed stuff
(have linuxcnc as a meta package, and pull linuxcnc-rtai, linuximage-rtai
and so on), that way it's easy for people to upgrade even if the name
changes (although they still need to change the repository name from 2.6 to
2.7, probably using an upgrade-script which can pull the linuxcnc-rtai
package directly).
Alex
-----Original Message-----
From: Sebastian Kuzminsky
Sent: Friday, October 24, 2014 7:49 AM
To: EMC developers
Subject: [Emc-developers] packaging for 2.7
Packaging of LinuxCNC should probaly change some for 2.7.
In 2.6 and earlier we shipped two debian packages (plus their
corresponding -dev packages, and the -doc packages):
linuxcnc.deb (configure --with-realtime=$RTAI)
linuxcnc-sim.deb (configure --enable-simulator)
The 2.6 RTAI deb can only run with the RTAI kernel and provides realtime
scheduling and hardware access. The 2.6 sim deb can run with any kernel
and does not provide any realtime scheduling or hardware access.
In 2.7 we'll want to ship two packages:
something.deb (configure --with-realtime=$RTAI)
somethingelse.deb (config --with-realtime=uspace)
The 2.7 RTAI deb is just like before, it runs under RTAI with realtime
scheduling and hardware access. I think this linuxcnc-for-rtai package
should still be called linuxcnc.deb, although an argument could be made
for "linuxcnc-rtai.deb".
The uspace deb can run under any kernel. It uses the POSIX realtime
scheduler (which provides good realtime performance under the RT-Preempt
kernel and no-so-great realtime performance under the vanilla kernel)
and iopl for hardware access.
I think this linuxcnc-for-posix-realtime package should *not* be called
"linuxcnc-sim", since it is not limited to simulation like the 2.6
linuxcnc-sim was. The uspace package is fully capable of realtime
machine control, if you run it under the right kernel (rt-preempt), so
"sim" is a misnomer.
It should probably be called "linuxcnc-uspace.deb", and per the Debian
Policy Manual[0] it should Provide:, Conflict:, and Replace: linuxcnc-sim.
0: https://www.debian.org/doc/debian-policy/ch-relationships.html#s7.6.2
Thoughts/comments?
--
Sebastian Kuzminsky
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