Here is a memo about RPM building in Linux environment.
First is necessary an RPM-based distribution. The most famous are Fedora and CentOS.
Let’s suppose you want to build your RPMs in the folder $RPMREPO.
You need first the correct folder tree for package creation.
cp -r /usr/src/redhat/* $RPMREPO
Then what is necessary is a spec file (Ex: spec_file.spec). It contains all the directives necessary to create the package.
You may find examples of spec files in RedHat SVN repositories like the one of PostgreSQL 9.0 package.
With a spec file, you may need a PAM file (Ex: file.pam), containing data like:
auth include password-auth
account include password-auth
Don’t forget that you also need a tarball (Ex: foo.tar.gz) or something equivalent containing the code.
Then copy the PAM file and the tarball inside $RPMREPO/SOURCES.
cp file.pam foo.tar.gz $RPMREPO/SOURCES
Copy the spec file to the correct folder.
cp spec_file.spec $RPMREPO/SPECS
Before building an RPM, it is necessary to set a file called .rpmmacros located in $HOME directory.
echo "%_topdir $RPMREPO" > $HOME/.rpmmacros
Then you can create the RPM with this command, assuming spec, pam and tarball files are correct.
rpmbuild -ba spec_file.spec
If no error occurred, SRPM file is located in $RPMREPO/SRPMS, RPM packages are located in $RPMREPO/RPMS/x86_64.
Here are some additional useful commands.
You can also build a RPM package from a SRPM file.
rpmbuild --rebuild $SRPM_FILE
Check content of an RPM file.
rpm -qpl $RPM_FILE
Export files of an RPM package.
rpm2cpio $RPM_FILE | cpio -idv