[Dovecot] Compile and configure Solr plugin

[Rui Carneiro]

Hi all,

I'm having some kind of troubles on Solr's integration. I configured Dovecot
with the Solr argument (--with-solr) and everything proceeded just fine.
But, when I started Dovecot I got this error:

Plugin fts_solr not found from directory /usr/lib64/dovecot/modules/imap
Error: imap dump-capability process returned 89
Fatal: Invalid configuration in /etc/dovecot/dovecot.conf

In fact, there is no Solr plugin in that directory. So I tried to make a
symbolic link from where the compiled Solr plugin was to this directory:
ln -s /usr/local/lib/dovecot/lib21_fts_solr_plugin.so

And now I have the following error:

dlopen(/usr/lib64/dovecot/modules/imap/lib21_fts_solr_plugin.so) failed:
/usr/lib64/dovecot/modules/imap/lib21_fts_solr_plugin.so: undefined symbol:
mailbox_get_virtual_box_patterns
Couldn't load required plugins
Error: imap dump-capability process returned 89
Fatal: Invalid configuration in /etc/dovecot/dovecot.conf

I'm missing some steps in this installation for sure, do anyone have any
clue?

Thanks,
Rui Carneiro