You could do a lot worse than following this documentation:
https://wiki.centos.org/HowTos/Custom_Kernel
On 20/04/2022 14:28, Passerini Marco wrote:
Hi,
I think you're right, I got it after I enabled:
# cat /etc/yum.repos.d/CentOS-Sources.repo
[...]
[base-source]
name=CentOS-$releasever - Base Sources
baseurl=http://vault.centos.org/centos/$releasever/os/Source/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
[...]
Then I ran:
# yumdownloader --source kernel.src
Loaded plugins: fastestmirror
Enabling centos-sclo-rh-source repository
Enabling epel-source repository
Enabling updates-source repository
Enabling centos-sclo-sclo-source repository
Enabling extras-source repository
Loading mirror speeds from cached hostfile
epel/x86_64/metalink | 31 kB 00:00:00
epel-source/x86_64/metalink | 29 kB 00:00:00
* base: mirror.imt-systems.com
* centos-sclo-rh: ftp.agdsn.de
* centos-sclo-sclo: de.mirrors.clouvider.net
* epel: fedora.tu-chemnitz.de
* epel-source: fedora.tu-chemnitz.de
* extras: mirror.imt-systems.com
* updates: mirror.scaleuptech.com
base | 3.6 kB 00:00:00
base-source | 2.9 kB 00:00:00
centos-sclo-rh | 3.0 kB 00:00:00
centos-sclo-rh-source | 3.0 kB 00:00:00
centos-sclo-sclo | 3.0 kB 00:00:00
centos-sclo-sclo-source | 3.0 kB 00:00:00
extras | 2.9 kB 00:00:00
extras-source | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
updates-source | 2.9 kB 00:00:00
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
kernel-4.18.0-348.20.1.el7.src.rpm | 121 MB 00:00:01
This version is too recent I think. I'm not sure why it's there?
I then manually downloaded this version, it looks like it's working better:
wget https://vault.centos.org/7.9.2009/os/Source/SPackages/kernel-3.10.0-1160.el7.src.rpm
Regards,
Marco Passerini
________________________________
From: CentOS <centos-bounces@xxxxxxxxxx> on behalf of Phil Perry <pperry@xxxxxxxxxx>
Sent: Tuesday, April 19, 2022 5:46:15 PM
To: centos@xxxxxxxxxx
Subject: Re: Kernel rebuild failling on Centos 7: missing libbpf-devel and dwarves rpm too old
On 19/04/2022 15:56, Passerini Marco wrote:
Hi,
I'm trying to rebuild the kernel specifically on Centos7 from src.rpm but some packages are missing or too old. I managed to get them and compile on Centos8 though. Any advice?
# yumdownloader --source kernel.src
# rpm -ivh ./kernel-4.18.0-348.20.1.el7.src.rpm
# rpmbuild -bb --target=`uname -m` ~/rpmbuild/SPECS/kernel.spec
Building target platforms: x86_64
Building for target x86_64
error: Failed build dependencies:
libbpf-devel is needed by kernel-4.18.0-348.20.1.el7.x86_64
rpm < 4.13.0.1-19 conflicts with kernel-4.18.0-348.20.1.el7.x86_64
dwarves < 1.13 conflicts with kernel-4.18.0-348.20.1.el7.x86_64
You seem to be trying to build an el8 kernel source on el7?
# rpm -q dwarves
dwarves-1.10-1.el7.x86_64
# rpm -q rpm
rpm-4.11.3-48.el7_9.x86_64
# yum search libbpf-devel
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: de.mirrors.clouvider.net
* centos-sclo-rh: ftp.tu-chemnitz.de
* centos-sclo-sclo: centos.mirrors.psw.services
* epel: ftp.uni-kl.de
* extras: mirror.imt-systems.com
* updates: centos.mirror.iphh.net
Warning: No matches found for: libbpf-devel
No matches found
# yum info rpm
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: de.mirrors.clouvider.net
* centos-sclo-rh: ftp.tu-chemnitz.de
* centos-sclo-sclo: mirror.softaculous.com
* epel: mirror.nextlayer.at
* extras: mirror.imt-systems.com
* updates: centos.mirror.iphh.net
Installed Packages
Name : rpm
Arch : x86_64
Version : 4.11.3
Release : 48.el7_9
Size : 2.5 M
Repo : installed
>From repo : updates
Summary : The RPM package management system
URL : http://www.rpm.org/
License : GPLv2+
Description : The RPM Package Manager (RPM) is a powerful command line driven
: package management system capable of installing, uninstalling,
: verifying, querying, and updating software packages. Each software
: package consists of an archive of files along with information about
: the package like its version, a description, etc.
# yum info dwarves
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: de.mirrors.clouvider.net
* centos-sclo-rh: ftp.tu-chemnitz.de
* centos-sclo-sclo: ftp.antilo.de
* epel: mirror.de.leaseweb.net
* extras: mirror.imt-systems.com
* updates: centos.mirror.iphh.net
Installed Packages
Name : dwarves
Arch : x86_64
Version : 1.10
Release : 1.el7
Size : 199 k
Repo : installed
>From repo : epel
Summary : Debugging Information Manipulation Tools
URL : http://oops.ghostprotocols.net:81/blog
License : GPLv2
Description : dwarves is a set of tools that use the debugging information inserted in
: ELF binaries by compilers such as GCC, used by well known debuggers such as
: GDB, and more recent ones such as systemtap.
:
: Utilities in the dwarves suite include pahole, that can be used to find
: alignment holes in structs and classes in languages such as C, C++, but not
: limited to these.
:
: It also extracts other information such as CPU cacheline alignment, helping
: pack those structures to achieve more cache hits.
:
: A diff like tool, codiff can be used to compare the effects changes in source
: code generate on the resulting binaries.
:
: Another tool is pfunct, that can be used to find all sorts of information about
: functions, inlines, decisions made by the compiler about inlining, etc.
Regards,
Marco Passerini
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