Re: How to provide support for -i386 utilities within -amd64 packages?

[Christopher James Halse Rogers <chris@cooperteam.net>]

On Sat, May 24, 2014 at 1:08 AM, Carl Worth <cworth@cworth.org> wrote:
> Christopher James Halse Rogers <chris@cooperteam.net> writes:
> >  For apitrace we ended up using the $LIB dynamic expansion to let the
> >  dynamic loader handle this itself 
> >  (https://github.com/apitrace/apitrace/pull/177).
> >
> >  That's presumably applicable to fips and vogl also.
>
> Yes, that $LIB thing is really convenient for this.. The last time I
> looked, it wasn't available within LD_PRELOAD like it is for
> LD_LIBRARY_PATH.
>
> But yes, we already are using this in vogl and fips where possible.

Aha! But if you prepend /usr/lib/$LIB/vogl/ to LD_LIBRARY_PATH and then 
set
LD_PRELOAD to vogl.so (or whatever, rather than the absolute path) then 
you
effectively get it for LD_PRELOAD, too :)

The only edge case I can think of that this would break is where the 
tracee
itself prepends a path containing a _different_ vogl.so to 
LD_LIBRARY_PATH;
that seems like a pretty unlikely confluence of events.