Source level upgrade from 4.9 to CURRENT..

[Thomas Backman]

On Sep 15, 2009, at 7:36 PM, Rom Albuquerque wrote:

> Hi folks. Need help in doing the following, but first want to check
> and see if it is feasible with the latest release, or if I'm just  
> going to
> be spinning my wheels on this one.
>
> The Objective.
> ==============
>
> I have a FreeBSD 4.9-RELEASE system which I want to upgrade to 7.X
> from the source level. Had a bunch of problems installing 7.1- 
> RELEASE from
> the CD distribution I got from freebsdmall.com. Several problems that
> could not mount the CD at the time of installation causing sysinstall
> to halt. So, 4.9 is installed and working, is there a source level
> backward compatibility issue between 7.x and anything older than 6.0 ?
> In other words, upgrading from the sources with such an old
> distribution is a doable task ?
>
>
> Your response is greatly appreciated.
>
> Many thanks.
I can't say how many steps are needed, but more than one.
 From /usr/src/UPDATING:

20080123:
     To upgrade to -current after this date, you must be running
     FreeBSD not older than 6.0-RELEASE.  Upgrading to -current
     from 5.x now requires a stop over at RELENG_6 or RELENG_7 systems.

Regards,
Thomas