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