Re: set env affects host?

[<gp at qnx dot com>]

Thanks Paul, Daniel.

Knowing how it works (on my part) helps!  ;-)  The more I think about it, it 
seems right that LD_LIBRARY_PATH be used only for loading solibs at runtime 
(whether on the host or the target) and that a different env-var/mechanism be 
used for the symbol file search path.

I (obviously) could see it the other way, too, but this does make sense, and 
has the benefit of being how it actually works...  ;-)

Thanks again.  I will check thread 633 on this.

Regards,
GP

Daniel Jacobowitz <drow@mvista.com> said:

> On Wed, Nov 13, 2002 at 05:47:56PM -0500, Paul Koning wrote:
> > >>>>> "Graeme" == Graeme Peterson <gp@qnx.com> writes:
> > 
> >  Graeme> Well, I think I have answered my own question by checking in
> >  Graeme> the source.  I found a comment in solib.c for solib_open that
> >  Graeme> says that solib symbols are found in the inferior's
> >  Graeme> LD_LIBRARY_PATH, and never in the host's.  So I guess that is
> >  Graeme> that.  :-)
> > 
> >  Graeme> Search order: 
> >  Graeme> * If path is absolute, look in SOLIB_ABSOLUTE_PREFIX.  
> >  Graeme> * If path is absolute or relative, look for it literally
> >  Graeme>   (unmodified).  
> >  Graeme> * Look in SOLIB_SEARCH_PATH.  
> >  Graeme> * Look in inferior's $PATH.  
> >  Graeme> * Look in inferior's $LD_LIBRARY_PATH.
> > 
> >  Graeme> Anyone care to comment on the rationale behind the behavior?
> >  Graeme> Clearly it seemed reasonable to me to find the solibs for
> >  Graeme> symbols in the host's LD_LIBRARY_PATH, but that is wrong.
> > 
> > Looking in the host LD_LIBRARY_PATH, or for that matter using absolute
> > names literally, is likely to be wrong for cross-debugging.
> > Fortunately the literal lookup is not the first thing tried, but as
> > far as I'm concerned it might as well go away entirely if host !=
> > target. 
> 
> I think that was the consensus the last time this came up: cross
> debuggers should only do some of those.  Check the large discussion
> resulting from gdb/633.
> 
> Either local/remote or native/cross should control this; someone just
> needs to decide the exact behavior and implement it :)
> 
> -- 
> Daniel Jacobowitz
> MontaVista Software                         Debian GNU/Linux Developer
> 



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