For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/openSUSE_Tumbleweed/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7
For openSUSE Tools Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/openSUSE_Tools_Tumbleweed/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/openSUSE_Slowroll/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/15.6/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/15.5/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:holden:buildtools/15.4/home:holden:buildtools.repo
zypper refresh
zypper install org.kde.Sdk-v6.7