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 at centos.org> on behalf of Phil Perry <pperry at elrepo.org> > Sent: Tuesday, April 19, 2022 5:46:15 PM > To: centos at 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 at centos.org >> https://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos