Re: -dlopen self on AIX

[Howard Chu]

Albert Chin wrote:
> On Sun, Oct 30, 2005 at 11:14:14AM -0600, Albert Chin wrote:
> > [snip ...]
> >
> > This means the method libtool uses to support -dlopen self on AIX
> > won't work (by building a list of symbols into some xxS.o file and
> > linking it with the executable). The real solution is to -bE the
> > symbol list. What's the cleanest way to do this?
> >
> > Dynamic module support in openldap-2.3.x isn't working on AIX for the
> > above reason. Using -bexpall or -bE when linking the main binary does
> > work though. While the main binary, slapd, doesn't dlopen itself,
> > modules it dlopen()'s cannot resolve symbols in slapd because they
> > weren't exported.
>
> Seems the openldap folks should really use -export-dynamic, which
> isn't defined for AIX. We could make it -bexpall but as documented in
> the previous mail, it doesn't export everything. So, should we create
> a new variable, export_dynamic_cmds? If so, and temporary files are
> created by it, how do we clean up?
Wait. The fact that -bexpall "doesn't export everything" is A Good 
Thing. Symbol tables on AIX include a lot of junk that other modules 
simply don't need to see. The symbols they omit are generally not useful 
for user code anyway.

(In contrast to older releases of AIX, where they really did export 
everything, and you'd get clashes for stupid things like __init and such 
 that never should have been exported in the first place.)

--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/