maria-developers team mailing list archive

[AugustQ <augustq@xxxxxxx>]

Hi,

just one question:
I have a simple plugin (a minimal storage engine) that does not load.
When I try to load it I get this error-message:

MariaDB [(none)]> install plugin dummy soname 'ha_dummy';
ERROR 1126 (HY000): Can't open shared library
'/home/august/MariaDB/pgm/lib/plugin/ha_dummy.so' (errno: 2 undefined
symbol: _ZN9ha_myisam5cloneEPKcP11st_mem_root)

Can you please give me a tip. Thanks.

Environment is MariaDB 10.0.4.

The same code works without any problems in MySQL (5.5.8 - just for a
test).

The code is a minimal engine that just does nothing, I want to use it as
a template for further work.
this is the code in the form that it is working (the relevant parts):
in the header-file:
   class ha_dummy: public handler

in the code:
ha_dummy::ha_dummy(handlerton *hton, TABLE_SHARE *table_arg)
  :handler(hton, table_arg)

now I change this by modifying the inheritance-order:
in the header file:
added:
#include "../myisam/ha_myisam.h"
#include "../myisam/myisamdef.h"

modified:
    class ha_dummy: public ha_myisam

in the code:
/* Constructor */
ha_dummy::ha_dummy(handlerton *hton, TABLE_SHARE *table_arg)
  :ha_myisam(hton, table_arg)

It compiles but I cannot load it.

What's the problem with st_mem_root?

Thanks
AugustQ

PS: as written before: both versions work with MySQL.