Plugins Support on AIX
======================

/How to build Dovecot with plugins supported on AIX./

Tested with:

 * AIX 5.2, VAC 5.0.2 and Dovecot 1.0rc21 to 1.0.13 /(Dovecot 1.1.x does not
   build with VAC 5.0.2)/
 * AIX 5.2, VAC 8.0.0 and Dovecot 1.1.1

The Problem
-----------

 * When you trying to use plugins on AIX you seen error messages like this:
   ---%<----------------------------------------------------------------------
   imap(root): Error:
   dlopen(/usr/local/lib/dovecot/imap/lib20_zlib_plugin.so) failed:
   rtld: 0712-001 Symbol i_error was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol i_stream_get_data was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol i_stream_skip was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol i_stream_seek was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol i_stream_close was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol i_panic was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   rtld: 0712-001 Symbol pool_get_exp_grown_size was referenced
         from module /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so(),
         but a runtime definition of the symbol was not found.
   Additional errors occurred but are not reported.
   ---%<----------------------------------------------------------------------

 * .. produced by executing
   ---%<----------------------------------------------------------------------
   # MAIL_PLUGINS=zlib /usr/local/libexec/dovecot/imap
   ---%<----------------------------------------------------------------------

Compiler Script
---------------

 * Create a compiler script to rewrite the /xlc/ command line on the fly:
   *dovecot-cc*

   ---%<----------------------------------------------------------------------
   #!/bin/bash

   xlc=/usr/bin/xlc
   ar=/bin/ar
   sed=/bin/sed

   dest=NOBINARY

   for i in "$@"; do
           case "$i" in
           '-o')  dest=;;
           *)     if [ -z "$dest" ]; then dest="$i"; break; fi;;
           esac
   done

   case "$dest" in
   imap-login) args1="../lib-charset/libcharset.a ../lib-mail/libmail.a
   -liconv";;
   imap)       args1="../lib-sql/libsql.a";;
   pop3)       args1="../lib-sql/libsql.a";;
   deliver)    args1="../lib-sql/libsql.a";;
   esac

   for i in "$@" $args1; do
           case "$i" in
           */*.a) lib="${i##*/}"; obj=`$ar -t $i | $sed "s:^:${i%/*}/:"`;;
           *.a)   lib="$i";       obj=`$ar -t $i | $sed "s:^:./:"`;;
           *)     continue;;
           esac
           test -d .libs || mkdir .libs
           > .libs/${lib%.a}.exp
           args2="$args2 -bE:.libs/${lib%.a}.exp"

           (set -x ; exec $xlc -qmkshrobj -qexpfile=.libs/${lib%.a}.exp $obj)
   2>/dev/null
   done
   (set -x ; exec $xlc "$@" $args1 $args2)
   ---%<----------------------------------------------------------------------

Compiling Dovecot
-----------------

 * Expand Dovecot:
   ---%<----------------------------------------------------------------------
   gzip -cd doveccot-1.0.rc21.tar.gz | tar xvf -
   ---%<----------------------------------------------------------------------

 * Setup build environment:
   ---%<----------------------------------------------------------------------
   export CC=$PWD/dovecot-cc
   export LDFLAGS="-bexpall -brtl"
   ---%<----------------------------------------------------------------------

 * Configure and build Dovecot
   ---%<----------------------------------------------------------------------
   cd dovecot-1.0.rc21
   bash configure
   make
   ---%<----------------------------------------------------------------------

 * Test a plugin (e.g. zlib)
   ---%<----------------------------------------------------------------------
   echo 0 logout | MAIL_PLUGIN_DIR=src/plugins/zlib/.libs/ MAIL_PLUGINS="zlib"
   MAIL=maildir:/tmp src/imap/imap
   ---%<----------------------------------------------------------------------

   you should see this:
   ---%<----------------------------------------------------------------------
   * PREAUTH [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND
   UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS] Logged in as root
   * BYE Logging out
   0 OK Logout completed.
   imap(root): Info: Disconnected: Logged out
   ---%<----------------------------------------------------------------------

 * Install Dovecot
   ---%<----------------------------------------------------------------------
   make install
   ---%<----------------------------------------------------------------------

Prebuild Binaries for AIX 5.2
-----------------------------

You will find prebuild AIX 5.2 binaries here:
http://www.fh-trier.de/~beckerr/dovecot/

(This file was created from the wiki on 2019-06-19 12:42)