Re: Installing modules on AIX

[Robert Boehne]

Wayne,

If the software you're linking to requires it you can make .so's under
AIX by setting LDFLAGS=-brtl or -Wl,-brtl before running configure.

Robert

Wayne Stewart wrote:
> 
> Thanks, Robert.  Yes, that does help - to an extent.  I guess there is
> an "impedance mismatch" here, since Tcl (and Perl also I believe) by
> default builds, installs, and expects to open '.so' files for its
> dynamically loadable extensions on AIX.  However, libtool seems to be
> saying that for "modules" the '.a' file is always good enough.
> 
> Also I'm still confused by the following passage from the libtool
> documentation, since in my case (AIX) the 'dlname' in the '.la' for my
> module (library) refers to the '.so' file and not the '.a' file:
> 
> |Finding the correct name to dlopen
> |
> |   After a library has been linked with `-module', it can be dlopened.
> |Unfortunately, because of the variation in library names, your package
> |needs to determine the correct file to dlopen.
> |
> |   The most straightforward and flexible implementation is to determine
> |the name at runtime, by finding the installed `.la' file, and searching
> |it for the following lines:
> |
> |     # The name that we can `dlopen'.
> |     dlname='DLNAME'
> 
> I'd rather not do something kludgey like grepping through the '.la'
> library file to get the DLNAME when installing my module.  It would
> be preferable if libtool understool (via the -module option) that
> I'm trying to build/install a module, and hence libtool would
> install what it has for the DLNAME.  Or, if AIX is a special case,
> maybe it could install BOTH the '.a' and '.so' on this platform?
> 
> ----
> Thanks,
>     Wayne
> 
> On Wed, 12 Mar 2003, Robert Boehne wrote:
> 
> > Wayne,
> >
> > Under AIX 4.3 shared libraries do have flienames that end
> > with ".a", however these are also dlopen'able.  Under AIX
> > there are also "System V compatability" shared libraries
> > or rtl (run time linking) libraries that have filenames
> > ending with ".so".
> >
> > HTH,
> >
> > Robert Boehne
> >
> >
> > Wayne Stewart wrote:
> > >
> > > Hi,
> > >
> > > I'm not sure if you would classify this as a 'bug' or an
> > > enhancement request.
> > >
> > > Background:
> > >
> > > I am using libtool 1.4.3 (with automake 1.7.3 & autoconf 2.57) on
> > > IBM AIX 4.3.2 (PowerPC).  As you know, shared libraries end in '.a'
> > > on AIX, whereas dlopen'able modules end in '.so'.  I'm trying to
> > > build the latter (a dlopen'able module - actually a Tcl extension,
> > > which is essentially the same thing).  I use the following libtool
> > > options in my Makefile.am: -module -no-undefined -avoid-version.
> > >
> > > Issue:
> > >
> > > When I 'make install' my module, only the '.a' (& .la) library
> > > gets installed.  I've already specified that I'm trying to build
> > > a module (via the -module option), so I don't understand why my
> > > desired end-item (the .so file) does not get installed.
> > >
> > > Thanks,
> > > ----
> > >     Wayne
> > >
> > > _______________________________________________
> > > Bug-libtool mailing list
> > > address@hidden
> > > http://mail.gnu.org/mailman/listinfo/bug-libtool
> >
> 
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