Mesa-libRusticlOpenCL from home:Exotic project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Exotic/openSUSE_Tumbleweed/home:Exotic.repo zypper refresh zypper install Mesa-libRusticlOpenCL