For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cwh:orcaslicer/openSUSE_Tumbleweed/home:cwh:orcaslicer.repo
zypper refresh
zypper install boost-extra
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cwh:orcaslicer/openSUSE_Factory/home:cwh:orcaslicer.repo
zypper refresh
zypper install boost-extra
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cwh:orcaslicer/16.0/home:cwh:orcaslicer.repo
zypper refresh
zypper install boost-extra
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cwh:orcaslicer/15.6/home:cwh:orcaslicer.repo
zypper refresh
zypper install boost-extra