Hello. I'm attempting a newbie skill building exercise rather than solving a particular problem, but I'm missing something obvious. Searching hasnt helped me on this specific point.
I imagine that 'make' of the entire kernel source RPM (at the exact version as my Fedora 9 precompiled kernels) should closely duplicate my precompiled kernel modules, for example my ALSA driver module snd-intel8x0.ko
However as shown by 'ls' at the last paragraph of this email, I notice that the snd-intel8x0.ko I build using 'make' is 230265 bytes but the precompiled operational one is *much* smaller at 39592 bytes.
I am afraid to proceed to 'make install' until these files look similar/identical.
Also I notice that if I build the kernel.rpm and then 'rpm -qp --dump' it, then these file sizes *are* identical.
So I am wondering what affects the size of the .ko file between 'make' and the built RPM. As a newbie in this area I am far from comprehending the entire kernel.spec or Makefiles system. So it would greatly assist me if someone could give me a pointer what to look at next.
Please note that my aim is not to build an rpm. My aim is to become knowledgable enough extract a kernel source tree from a srpm, to be able to 'make' it, and ultimately to be able to 'make' subsections of it, in particular make and install an individual module, without building an rpm. I understand the consequences for my rpm database.
Using diff on the output from 'modinfo' on each file gives only these differences < filename: /BIG/HOME/david/rpmbuild/BUILD/kernel-2.6.25/linux-2.6.25.i686/sound/pci/snd-intel8x0.ko
filename: /lib/modules/2.6.25-14.fc9.i686/kernel/sound/pci/snd-intel8x0.ko
< vermagic: 2.6.25 SMP mod_unload 686 4KSTACKS
vermagic: 2.6.25-14.fc9.i686 SMP mod_unload 686 4KSTACKS
I'm using the reference http://www.tldp.org/LDP/lkmpg/2.6/html/x380.html ("Linux Kernel Module Programming Guide: Building modules for a precompiled kernel").
My complete approach is reproduced below. Probably you can skip the first 3 paragraphs that just show my rpmbuild targets. ~/rpmbuild is a symlink due to insufficient free space on my home drive.
By the way, I live in a remote location with poor quality dialup internet so sadly I cannot possibly keep my installation at the latest update of all packages between DVD releases.
I'll be really grateful for any tips on the above, thanks. David
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[~]$ uname -a Linux kablamm.localdomain 2.6.25-14.fc9.i686 #1 SMP Thu May 1 06:28:41 EDT 2008 i686 i686 i386 GNU/Linux
[~]$ ln -v -s -f -T "/BIG/HOME/david/rpmbuild" "/home/david/rpmbuild" `/home/david/rpmbuild' -> `/BIG/HOME/david/rpmbuild'
[~]$ cat .rpmmacros %_topdir %(echo $HOME)/rpmbuild %_smp_mflags -j3 %__arch_install_post /usr/lib/rpm/check-rpaths /usr/lib/rpm/check-buildroot %packager David %distribution Fedora %(tr -dc [0-9] </etc/fedora-release) %vendor David %_home %(echo $HOME) %_signature gpg %_gpg_path %{_home}/.gnupg %_gpgbin /usr/bin/gpg %_gpg_name %( gpg --list-keys | sed -n "s/^uid *//p" | head -1 ) %_rpmdir %{_topdir}/RPM %_srcrpmdir %{_topdir}/RPM %_rpmtopdir %{_topdir}/%{name}-%{version}-%{release} %_specdir %{_rpmtopdir} %_sourcedir %{_rpmtopdir} %_tmppath %{_topdir}/TMP %_builddir %{_topdir}/BUILD
[~]$ rpm -Uvh kernel-2.6.25-14.fc9.src.rpm
[~]$ cd ~/rpmbuild/kernel-2.6.25-14.fc9
[kernel-2.6.25-14.fc9]$ rpmbuild -bp "--target=$(uname -m)" kernel.spec
[kernel-2.6.25-14.fc9]$ cd ~/rpmbuild/BUILD/kernel-2.6.25/linux-2.6.25.i686/
[linux-2.6.25.i686]$ cp /boot/config-2.6.25-14.fc9.i686 .config
[linux-2.6.25.i686]$ make
[linux-2.6.25.i686]$ find ~/rpmbuild/BUILD/kernel-2.6.25/ -name snd-intel8x0.ko /BIG/HOME/david/rpmbuild/BUILD/kernel-2.6.25/linux-2.6.25.i686/sound/pci/snd-intel8x0.ko
[linux-2.6.25.i686]$ ls -l ~/rpmbuild/BUILD/kernel-2.6.25/linux-2.6.25.i686/sound/pci/snd-intel8x0.ko /lib/modules/2.6.25-14.fc9.i686/kernel/sound/pci/snd-intel8x0.ko -rw-rw---- 1 david david 230265 2009-02-26 20:24 /home/david/rpmbuild/BUILD/kernel-2.6.25/linux-2.6.25.i686/sound/pci/snd-intel8x0.ko -rwxr--r-- 1 root root 39592 2008-05-01 20:49 /lib/modules/2.6.25-14.fc9.i686/kernel/sound/pci/snd-intel8x0.ko
On Fri, Feb 27, 2009 at 5:18 PM, Kevin Kofler kevin.kofler@chello.at wrote:
David wrote:
So I am wondering what affects the size of the .ko file between 'make' and the built RPM.
Debugging information is extracted into a separate RPM.
Thanks Kevin.
If I want to learn more about that, is that functionality built into 'rpmbuild' (and therefore perhaps described in its documentation), or is it some other command?
On Fri, 2009-02-27 at 17:11 +1100, David wrote:
By the way, I live in a remote location with poor quality dialup internet so sadly I cannot possibly keep my installation at the latest update of all packages between DVD releases.
I'll be really grateful for any tips on the above, thanks. David
I don't know if it's around for the latest release, but some time ago there was a delta update system available. Basically, many of the updates only require small changes from the previously installed version, so the delta update would only update the bits that changed, rather than replace the entire old package with an entirely new package.
Someone might say if you can still do this. It would help, enormously, with keeping a system up to date over dialup.
On Fri, 2009-02-27 at 17:33 +1030, Tim wrote:
On Fri, 2009-02-27 at 17:11 +1100, David wrote:
By the way, I live in a remote location with poor quality dialup internet so sadly I cannot possibly keep my installation at the latest update of all packages between DVD releases.
I'll be really grateful for any tips on the above, thanks. David
I don't know if it's around for the latest release, but some time ago there was a delta update system available. Basically, many of the updates only require small changes from the previously installed version, so the delta update would only update the bits that changed, rather than replace the entire old package with an entirely new package.
Someone might say if you can still do this. It would help, enormously, with keeping a system up to date over dialup.
It is still up and running for i386/x86_64. Please see http://presto.fedorahosted.org for more details.
Jonathan
David wrote:
If I want to learn more about that, is that functionality built into 'rpmbuild' (and therefore perhaps described in its documentation), or is it some other command?
For most packages, it's handled by redhat-rpm-config, but as far as I know the kernel package uses some special treatment hardcoded within kernel.spec.
Kevin Kofler
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David -
Jonathan Dieter -
Kevin Kofler -
Tim