8a486717_RPM_package_pt___FedoraProject__Action
[Stage] bin [Reads] %_buildrootdir [Writes] %_rpmdir [Action] 
This reads the files underneath the build root directory %_buildrootdir (usually ~/rpmbuild/BUILDROOT/) to create binary RPM packages underneath the RPM directory %_rpmdir (usually ~/rpmbuild/RPMS/). Inside the RPM directory is a directory for each architecture, and a "noarch" directory for packages that apply to any architecture. These RPM files are the packages for users to install.
How to create an RPM package/pt - FedoraProject