Для openSUSE Leap 15.1 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:sdr-devel/openSUSE_Leap_15.1/home:mnhauke:sdr-devel.repo
zypper refresh
zypper install libiio
Для openSUSE Leap 15.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:sdr-devel/openSUSE_Leap_15.0/home:mnhauke:sdr-devel.repo
zypper refresh
zypper install libiio
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:sdr-devel/15.4/home:mnhauke:sdr-devel.repo
zypper refresh
zypper install libiio
Для 15.3 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:sdr-devel/15.3/home:mnhauke:sdr-devel.repo
zypper refresh
zypper install libiio