Home / server / Questions / 254815
Accepted
unixman83
Asked: 2011-04-02 15:10:02 +0800 CST

Building official SRPMs in CentOS. All the steps

  • 772

I am new to Centos and yum in general.

  1. How do I retreive the SRPM using yumdownloader --source? When I run the command it says the SRPMs are not found. How do I add the repository? I am talking about official CentOS packages here.
  2. Once downloaded, what is the command to unpack the SRPM so I can edit the files?
  3. Last, once I am done modifying, what is the command to rebuild the modified source RPM?
  4. From a SRPM, how does one create a RPM?
centos redhat rpm

2 Answers

  1. Best Answer
    • How do I retreive the SRPM using yumdownloader --source? When I run the command it says the SRPMs are not found. How do I add the repository? I am talking about official CentOS packages here.

    This is an issue with CentOS: http://bugs.centos.org/view.php?id=1646

    Assuming you're CentOS 5, create this file in /etc/yum.repos.d/CentOS-SRPMS.repo 

    [base-SRPMS]
name=CentOS-$releasever - Base SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/os/SRPMS/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1
enabled=1

#released updates
[update-SRPMS]
name=CentOS-$releasever - Updates SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/updates/SRPMS/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1
enabled=1

#packages used/produced in the build but not released
[addons-SRPMS]
name=CentOS-$releasever - Addons SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/addons/SRPMS/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1
enabled=1

#additional packages that may be useful
[extras-SRPMS]
name=CentOS-$releasever - Extras SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/extras/SRPMS/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1
enabled=1

#additional packages that extend functionality of existing packages
[centosplus-SRPMS]
name=CentOS-$releasever - Plus SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/centosplus/SRPMS/
gpgcheck=1
enabled=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1

#contrib - packages by Centos Users
[contrib-SRPMS]
name=CentOS-$releasever - Contrib SRPMS
baseurl=http://mirror.centos.org/centos/$releasever/contrib/SRPMS/
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
priority=1
    • Once downloaded, what is the command to unpack the SRPM so I can edit the files?

    rpm -ivh your.src.rpm

    This assumes you have necessary directories, if you don't run mkdir -p /usr/src/redhat/{BUILD,RPMS,SOURCES,SPECS,SRPMS} to create them.

    The file you'll usually want to edit is the spec file in /usr/src/redhat/SPECS/packagename.spec.

    • Last, once I am done modifying, what is the command to rebuild the modified source RPM?

    rpmbuild -bb /usr/src/redhat/SPECS/your.spec to just build the RPM

    rpmbuild -ba /usr/src/redhat/SPECS/your.spec to just build the RPM and an SRPM

    • From a SRPM, how does one create a RPM?

    rpmbuild --rebuild your.src.rpm

    If you need to build RPMs you should look in to using mock.

    • 1

  2. [centos-src]
    name=CentOS $releasever - $basearch - Source
    baseurl=http://mirror.centos.org/centos/$releasever/os/SRPMS/
    gpgcheck=1
    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

    yumdownloader --source kernel

    rpm -i kernel-arch.src.rpm

    UPDATE: This is also relevant:

    http://wiki.centos.org/HowTos/I_need_the_Kernel_Source

    cd /usr/src/redhat/SPECS
    rpmbuild -bp --target=`uname -m` kernel-2.6.spec

    • 0