Re: inter-library-dependency, how?

[Bob Friesenhahn]

On Mon, 21 Nov 2011, Bert Wesarg wrote:
> Christian and I independently solved this with the following fix:
>
> diff --git i/libltdl/config/ltmain.m4sh w/libltdl/config/ltmain.m4sh
> index ca67c8a..f79ab5b 100644 libltdl/config/ltmain.m4sh
> --- i/libltdl/config/ltmain.m4sh
> +++ w/libltdl/config/ltmain.m4sh
> @@ -6391,8 +6391,7 @@ func_mode_link ()
>            # Pragmatically, this seems to cause very few problems in
>            # practice:
>            case $deplib in
> -           -L*) new_libs="$deplib $new_libs" ;;
> -           -R*) ;;
> +           -L*|-R*) new_libs="$deplib $new_libs" ;;
>            *)
>              # And here is the reason: when a library appears more
>              # than once as an explicit dependence of a library, or
>
> With this patch, the -R flag inside the dependency_libs list is honored and 
> appropriately added to the link command.
>
> Is there anything wrong with this approach. If not we propose this patch for 
> inclusion. A proper ChangeLog and Signed-of-by line will follow than. I will 
> also try to transform Christians example into an test than.

Yes, I think that there is something wrong with this approach.  The -R 
option should not be used to find libraries at link time.  Libraries 
present in the run-time linker search path at link time are not 
necessarily the correct ones to be used for linking.  Run-time linker 
search path and link-time linker search path are totally different 
things.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/