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...
Regards, Marco Passerini
From: CentOS centos-bounces@centos.org on behalf of Phil Perry pperry@elrepo.org Sent: Tuesday, April 19, 2022 5:46:15 PM To: centos@centos.org Subject: Re: [CentOS] 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 _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
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