Building the kernel and kernel objects

[Dave Higton]

On 10-02-10 20:03:00, Tony Nelson wrote:
> 
> On 10-02-10 05:39:06, Dave Higton wrote:
> > > -----Original Message-----
> > > From: users-bounces at lists.fedoraproject.org 
> > > [mailto:users-bounces at lists.fedoraproject.org] On Behalf Of 
> > > Dave Higton
> > > Sent: 2010 February 10 09:43
> > > To: users at lists.fedoraproject.org
> > > Subject: Building the kernel and kernel objects
> > > 
> > > I'm trying to build the kernel (although all I want at the moment 
> > > is udf.ko) following the instructions at
> > > http://fedoraproject.org/wiki/Docs/CustomKernel but udf.ko is 
> > > coming out at over 20 times the size of the distribution 
> version.  
> > > I presume it's a debug version?
> > > 
> > > How do I build something that is identical (other than maybe 
> > > the version string) to the distribution version I'm using?
> > > 
> > > Please be gentle with me; I'm a first time kernel builder (i.e. 
> > > I've tried several times, but never yet succeeded).
> 
> I can see that you're also a first-time RPM (rpmbuild) user.

Yes.

I've now twigged that rpmbuild isn't about building /from/
RPMs, it's about building RPMs, so it creates the RPMs and
then deletes the files used to create them.

The current frustration is that I still can't build udf.ko
identical to, or even the same size as, the original in the
running distribution; the differences are more than can be
explained by different vermagic strings:

Distro       78604
kernel       79028
kernel-debug 78492

the latter two being what I've built.  Why the differences?
Yesterday morning I did happen to see, briefly, udf.ko built
at 78604 bytes, but that version didn't make it into any RPM
I built.

> > Even more frustrating: while the kernel build was running, I
> > searched for udf.ko and found one that was of identical size
> > to the distribution version.  By the time I tried to run a
> > binary comparison, the file had been deleted.
> > 
> > The penultimate line in the build window was:
> > 
> > + rm -rf
> > /home/my-username/rpmbuild/BUILDROOT/
> > kernel-2.6.27.41-170.2.117.abc42.fc
> > 10.i386
> > 
> > so that's what did the damage.  Where and why does that line
> > exist?
>  ...
> 
> It means that the new RPMs are all built.  You just need to install 
> them.  See the instructions you're following.  You might also 
> look into 
> building "out of tree" kernel modules, also in those instructions.

If only I could understand them.

Dave


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