For SLE 15 SP1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:jangouts/SLE_15_SP1/network:jangouts.repo
zypper refresh
zypper install gengetopt
For SLE 12 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:jangouts/SLE_12_SP5/network:jangouts.repo
zypper refresh
zypper install gengetopt
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:jangouts/SLE_12_SP4/network:jangouts.repo
zypper refresh
zypper install gengetopt
For SLE 12 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:jangouts/SLE_12_SP3/network:jangouts.repo
zypper refresh
zypper install gengetopt