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 # 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