uname -a compile count

[semi-ambivalent]

At some point in the past, certainly in the 4.x days, if I did uname -a I would see "what number" the loaded kernel was. Like

FreeBSD 4-STABLE #7:

I was doing (if memory serves)

cd /sys/i386/conf
cd ../../compile/MYKERNEL
make cleandir
cd -
config MYKERNEL
cd ../../compile/MYKERNEL
make depends...

These days when I compile using

cd /usr/src
make buildkernel KERNCONF=MYKERNEL
...

that kernel count ends up always being zero. Can I get that old behavior again?

thanks,
s-a

 

[tingo]

AFAIK, this behavior is still default. Here is an example from one of my machines:

tingo@kg-v7$ uname -a
FreeBSD kg-v7.kg4.no 8.2-STABLE FreeBSD 8.2-STABLE #6: Sat Jul  2 18:39:45 CEST 2011
     root@kg-v7.kg4.no:/usr/obj/usr/src/sys/GENERIC  amd64

I don't know why it doesn't work for you.

 

[wblock@]

The counter resets when source is updated. I think it's /usr/src/sys/conf/newvers.sh.

Anyway, if you just build a new kernel without updating source, then the counter increments.

 

[jalla]

My impression was that the counter is reset when you make the world.
I made buildkernel/installkernel a few days ago from a fresh /usr/src (without building the userland), and I now have

snapper:~% uname -a
FreeBSD snapper 8.2-STABLE FreeBSD 8.2-STABLE #1: Thu Jun 30 11:36:19 CEST 2011 tl@snapper:/usr/obj/usr/src/sys/snapper  amd64
snapper:~%

Also the version has been incremented by newvers.sh, and would take effect on the next kernel build

snapper:~% cat /usr/obj/usr/src/sys/snapper/version 
2
snapper:~%

 

[wblock@]

My impression was that the counter is reset when you make the world.

Just did some testing. /usr/obj/usr/src/sys/KERNELNAME/version is incremented after buildkernel. buildworld, installworld, and mergemaster(8) don't touch version as far as I can tell.

What I usually do for faster builds is delete /usr/obj/, which wipes out /usr/obj/usr/src/sys/KERNELNAME/version and resets it.

(/usr/obj/usr/src/sys/KERNELNAME/version is created on line 81 of /usr/src/sys/conf/newvers.sh. If it already exists, line 150 increments it after everything else.)

 

[semi-ambivalent]

Thanks all for the info. I was doing both; buildworld and using new sources (RELEASE -> STABLE). I'll experiment with these two, although with 4GB of memory there isn't much need to re-compile these days. Habit I guess.

thanks,
s-a