$ yumdownloader --source gdb $ rpmbuild --rebuild gdb-7.8.1-30.fc21.src.rpm $ cd ~/rpmbuild/SPECS/ $ sudo yum-builddep gdb.spec $ rpmbuild -bb gdb.spec
$ yumdownloader --source gdb $ rpmbuild --rebuild gdb-7.8.1-30.fc21.src.rpm $ cd ~/rpmbuild/SPECS/ $ sudo yum-builddep gdb.spec $ rpmbuild -bb gdb.spec