For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:haasn:branches:multimedia:apps/openSUSE_Tumbleweed/home:haasn:branches:multimedia:apps.repo
zypper refresh
zypper install shairport-sync
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:haasn:branches:multimedia:apps/openSUSE_Factory_PowerPC/home:haasn:branches:multimedia:apps.repo
zypper refresh
zypper install shairport-sync
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:haasn:branches:multimedia:apps/openSUSE_Factory_ARM/home:haasn:branches:multimedia:apps.repo
zypper refresh
zypper install shairport-sync