For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:c_c++/openSUSE_Factory_zSystems/devel:libraries:c_c++.repo
zypper refresh
zypper install cel-cpp
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:c_c++/openSUSE_Factory_PowerPC/devel:libraries:c_c++.repo
zypper refresh
zypper install cel-cpp
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:c_c++/openSUSE_Factory/devel:libraries:c_c++.repo
zypper refresh
zypper install cel-cpp
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:c_c++/15.6/devel:libraries:c_c++.repo
zypper refresh
zypper install cel-cpp
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:c_c++/15.5/devel:libraries:c_c++.repo
zypper refresh
zypper install cel-cpp