[CentOS] rebuilding the kernel.

[Akemi Yagi]

On Sun, Aug 10, 2008 at 4:04 PM, Yahia Tachwali
<ytachwali at signalogic.com> wrote:
> Akemi Yagi wrote:
>>>
>>> 1- getting the kernel:
>>>  1.1 access as root
>>>  1.2 yum install rpm-build redhat-rpm-config
>>>  1.3 su user
>>>  1.4 cd
>>>  1.5 mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
>>>  1.6 echo "%_topdir %(echo $HOME)/rpmbuild" > .rpmmacros
>>>  1.7 rpm -i
>>>
>>> http://mirror.centos.org/centos/4/updates/SRPMS/kernel-2.6.9-67.0.22.EL.src.rpm
>>>     2> /dev/null
>>>  1.8 cd ~/rpmbuild/SPECS
>>>  1.9 rpmbuild -bp --target=`uname -m` kernel-2.6.spec 2> prep-err.log |
>>> tee
>>> prep-out.log
>>
>> Looks good so far.
>>>
>>> These so far sound fine. but then I guess there might be a mistake or
>>> missing step in my procdure to build the new kernel:
>>>
>>> 2- building a new kernel:
>>>  2.1 access as root
>>>  2.2 rpmbuild -bp --target=`uname -m` kernel-2.6.spec 2> prep-err.log |
>>> tee
>>> prep-out.log
>>>
>>
>> The above rpmbuild is not necessary.  You have done it correctly in
>> step 1.9 (as user).
>>
>>>  2.3 su user
>>>  2.4 cd ~/rpmbuild/BUILD/kernel-2.6.18/linux-2.6.18.`uname -m`
>>>  2.5 cp configs/kernel-2.6.18-i686.config .config
>>>  2.6 make oldconfig
>>>  2.7 make menuconfig {here I left it as is and did not do any
>>> modification
>>> since I am                 planning to include HDLC as a module after
>>> build
>>> a complete custom kernel}
>>>
>>
>> I am confused.  If you did not make any changes here, why would you
>> expect your new kernel to provide the HDLC support (see above) ???
>>>
>>>  2.8 [user at host SPECS]$ rpmbuild -bb --target=`uname -m` kernel-2.6.spec
>>> 2>
>>> build-err.log |         tee build-out.log
>>
>> Before that step (rpmbuild -bb), you should at least edit the line:
>>
>> %define buildid .your_identifier
>>
>> as written in the Wiki tutorial to make your rpm's version different
>> from the distro's.
>>
>>>  2.9 su
>>>  2.10/ rpm -ivh kernel-*.rpm
>>>
>>>  and after the last command I have got the conflict warning above. What
>>> is
>>> wrong in my             installation procedure! :( Please help.
>>> /
>>>
>> Your "customized" kernel has the same version/revision as the
>> distro's.  So, it won't install unless you force it (not recommended
>> at all).
>>
>> Akemi

> Thank you. So if it is not recommended to force it , what should I do to get
> it installed ?

Please read my reply to you in its entirety, not just the last part --
especially the line about "buildid".

Akemi