需要 openSUSE Tumbleweed ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Tumbleweed/home:ykoba.repo
zypper refresh
zypper install SDL2
需要 15.6 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.6/home:ykoba.repo
zypper refresh
zypper install SDL2
需要 15.5 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.5/home:ykoba.repo
zypper refresh
zypper install SDL2
需要 15.4 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.4/home:ykoba.repo
zypper refresh
zypper install SDL2