Trying to configure MariaDBodbc connector on Ubuntu 18.04 on Raspberry Pi

Hi, I have both tried to generate the connector from the source code and installed the 3.1.7 package. My /etc/odbcinit.ini is

[MariaDB]
Description = MariaDB Connector/ODBC v.3.0
Driver = /usr/lib/libmaodbc.so
UsageCount=1
[asterisk]
Description = MySQL connection to 'asterisk'
Driver = MariaDB
Database = asterisk
Server = localhost
Port = 3306
Socket = /var/run/mysqld/mysqld.sock

My /etc/odbc.ini is

[asterisk]
Description = MySQL connection to 'asterisk'
Driver = MariaDB
Database = asterisk
Server = localhost
Port = 3306
Socket = /var/run/mysqld/mysqld.sock

sudo strace -t -o trace.txt isql -v asterisk ubuntu Brigitte99
[01000][unixODBC][Driver Manager]Can't open lib '/usr/lib/libmaodbc.so' : file not found
[ISQL]ERROR: Could not SQLConnect

but

 ls -l /usr/lib/libmaodbc.so             gives
-rwxr-xr-x 1 root root 2295400 juil.  9 15:11 /usr/lib/libmaodbc.so

Any ideas?

Pete