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export LDFLAGS="bexpall bla bla"
Thanx and best regards.

2007/3/28, Ralf Becker <beckerr at fh-trier.de>:
>
> Hello funkypunky drunky,
>
> on AIX dovecot plugins (which are shared objects = .so) are a little bit
> problematic. It is not enough to activate run time linking by using
> -brtl and make the main program (dovecot) to be able to use shared
> objects. When a share object does function calls back into the main
> program, all these functions (=symbols) in dovecot have to be explicitly
> exported. Otherwise you see "signal 11" or so.
>
> Because this is very fiddly, there is a linker flag -bexpall to export
> all symbols of the main program (dovecot)... but this does seemingly not
> work with symbols defined in static libraries (.a).
>
> While dovecot build creates static libraries to keep the linker command
> line small, but does *not* generate export files (.exp) containing the
> libraries globals symbols, the compile time linker does not known
> anything about them.
> I think, if dovecot build would use libtool to create the libraries,
> libtool would export the libraries symbols to fix this.
>
> And this is, what my script does. It looks on the compiler command line
> for library file (.a) and exports all global symbols to an .exp file.
> The paths of these .exp files are appended to the original compiler
> command line and so -bexpall knows about the globale symbols defined in
> the libraries and is able to export them.
>
> I don't know if this information is useful for you, because you're using
> gcc. But if you are using AIX ld (instead of gnu ld) you have to deal
> with this problem, I think.
>
> Regards, Ralf
>
> funkypunky drunky schrieb:
> > Hi Ralf
> > I check your script. But i cannot udnerstand what you  do. R u trying to
> > export the library of the dovecot? I cannot go deeper.  Anyway would you
> > like to tell what did you do with XLC compiler. Maybe i can setup the
> > analogy of it when using gcc instead of XLC.
> > Best regards.
> >
> >
> > 2007/3/27, Ralf Becker <beckerr at fh-trier.de <mailto:beckerr at fh-trier.de
> >>:
> >
> >     Hello!
> >
> >     Have you tried to export all symbols defined in lib archives
> generated
> >     while dovecot is build? I've had this problem on aix with xlC and
> >     solved
> >     it by writing an compiler script for doing that.
> >
> >     See
> >        http://www.dovecot.org/list/dovecot/2007-February/019226.html
> >     and
> >        http://wiki.dovecot.org/AixPluginsSupport
> >
> >     Regards, Ralf
> >
> >     Timo Sirainen schrieb am 26.03.2007 21:08:
> >     > On Mon, 2007-03-26 at 09:24 +0300, funkypunky drunky wrote:
> >     >> I pasted the output of gdb. I hope it is usefull. Thanx
> >     >>
> >     >> This GDB was configured as "powerpc-ibm-aix5.1.0.0"...
> >     >> Core was generated by `imap'.
> >     >> Program terminated with signal 11, Segmentation fault.
> >     >> #0  0xd1a468cc in i_malloc ()
> >     >>    from /usr/local/lib/dovecot/imap/lib10_quota_plugin.so
> >     >> (gdb) bt full
> >     >> #0  0xd1a468cc in i_malloc ()
> >     >>    from /usr/local/lib/dovecot/imap/lib10_quota_plugin.so
> >     >> No symbol table info available.
> >     >> #1  0xd1a47cc8 in quota_init () at quota.c:32
> >     >
> >     > So it crashes at the first Dovecot function it tries to call.
> Perhaps
> >     > the imap binary isn't exporting the symbols, or something like
> that.
> >     > I've no idea. Anyway it is most likely related to some linking or
> >     > compiling flags (or the linker/compiler itself).
> >     >
> >
> >     --
> >
> ______________________________________________________________________
> >
> >     Dipl.-Inform. (FH) Ralf Becker     Rechenzentrum (r/ft) der FH Trier
> >     (Network|Mail|Web|Firewall)           University of applied sciences
> >     Administrator                           Schneidershof, D-54293 Trier
> >
> >     Mail: beckerr at fh-trier.de
> >     <mailto:beckerr at fh-trier.de>                      Fon: +49 651 8103
> 499
> >     WWW:  http://www.fh-trier.de/~beckerr          Fax: +49 651 8103 214
> >     PGP:  http://www.fh-trier.de/~beckerr/pgp      ICQ: <available>
> >
> ______________________________________________________________________
> >
> >     Wenn Gott gewollt haette, dass E-Mail in HTML geschrieben wuerden,
> >     endeten Gebete traditionell mit </amen>. (Tom Listen)
> >
> >
>
> --
> ______________________________________________________________________
>
> Dipl.-Inform. (FH) Ralf Becker     Rechenzentrum (r/ft) der FH Trier
> (Network|Mail|Web|Firewall)           University of applied sciences
> Administrator                           Schneidershof, D-54293 Trier
>
> Mail: beckerr at fh-trier.de                      Fon: +49 651 8103 499
> WWW:  http://www.fh-trier.de/~beckerr          Fax: +49 651 8103 214
> PGP:  http://www.fh-trier.de/~beckerr/pgp      ICQ: <available>
> ______________________________________________________________________
>
> Wenn Gott gewollt haette, dass E-Mail in HTML geschrieben wuerden,
> endeten Gebete traditionell mit </amen>. (Tom Listen)
>
>
>

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