Seems mariadbc-10.5 built just fine on ia64: https://buildd.debian.org/status/fetch.php?pkg=mariadb-10.5&arch=ia64&ver=1%3A10.5.5-1%7Eexp1&stamp=1599939666&raw=0
Seems mariadbc-10.5 built just fine on ia64: https://buildd.debian.org/status/fetch.php?pkg=mariadb-10.5&arch=ia64&ver=1%3A10.5.5-1%7Eexp1&stamp=1599939666&raw=0