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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