libc++1 from home:aaronpuchert:Backports:SLE-15 project
Select Your Operating System
Add repository and install manually
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:aaronpuchert:Backports:SLE-15/15.5/home:aaronpuchert:Backports:SLE-15.repo zypper refresh zypper install libc++1