Para openSUSE Leap 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Leap_15.5/devel:gcc.repo
zypper refresh
zypper install cpp48
Para openSUSE Leap 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Leap_15.4/devel:gcc.repo
zypper refresh
zypper install cpp48
Para openSUSE Leap 15.3 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Leap_15.3/devel:gcc.repo
zypper refresh
zypper install cpp48
Para SLE-15 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/SLE-15/devel:gcc.repo
zypper refresh
zypper install cpp48
Para SLE-12 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/SLE-12/devel:gcc.repo
zypper refresh
zypper install cpp48
Para SLE-11 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:gcc/SLE-11/devel:gcc.repo
zypper refresh
zypper install cpp48