Ubuntu 14.04 gcc-9 link error

#include <cstdio>
#include <cstring>
#include <zdb/zdb.h>

int main(int agc, char **argv)
{
    URL_T url = URL_new("mysql://localhost/test?user=root&password=swordfish");
    ConnectionPool_T pool = ConnectionPool_new(url);
    ConnectionPool_start(pool);

    Connection_T con = ConnectionPool_getConnection(pool);
    ResultSet_T result = Connection_executeQuery(con,
                                                 "select id, name, image from employee where salary > %d", 1);
    while (ResultSet_next(result))
    {
        int id = ResultSet_getInt(result, 1);
        const char *name = ResultSet_getString(result, 2);
        int blobSize;
        const void *image = ResultSet_getBlob(result, 3, &blobSize);
    }

    ResultSet_T r = Connection_executeQuery(con, "SELECT count(*) FROM users");
    printf("Number of users: %s\n", ResultSet_next(r) ? ResultSet_getString(r, 1) : "no users");
    return 0;
}

g++ -o test main.cpp -std=c++17 -L /usr/lib/ -lzdb  -I /usr/include/zdb

/tmp/ccVuR7v3.o: In the function ‘main’:
main.cpp:(.text+0x15): undefined reference to ‘URL_new’
/usr/lib//libzdb.so: undefined reference to ‘URL_getUser’
/usr/lib//libzdb.so: undefined reference to ‘Exception_throw’
/usr/lib//libzdb.so: undefined reference to ‘URL_getParameterNames’
/usr/lib//libzdb.so: undefined reference to ‘URL_getParameter’
/usr/lib//libzdb.so: undefined reference to ‘URL_getHost’
/usr/lib//libzdb.so: undefined reference to ‘URL_getPassword’
/usr/lib//libzdb.so: undefined reference to ‘URL_getPath’
/usr/lib//libzdb.so: undefined reference to ‘URL_getPort’
/usr/lib//libzdb.so: undefined reference to ‘URL_getProtocol’
collect2: error: ld returned 1 exit status
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