Date: Thu, 31 May 2012 14:32:15 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: freebsd-stable@freebsd.org, Oliver Fromme <olli@lurza.secnetix.de> Subject: Re: i386 binaries on amd64: ldconfig problems Message-ID: <20120531113215.GO2358@deviant.kiev.zoral.com.ua> In-Reply-To: <4FC747DA.8040902@rdtc.ru> References: <201205301615.q4UGFxSF051308@lurza.secnetix.de> <20120531095847.GN2358@deviant.kiev.zoral.com.ua> <4FC747DA.8040902@rdtc.ru>
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On Thu, May 31, 2012 at 05:28:42PM +0700, Eugene Grosbein wrote:
> 31.05.2012 16:58, Konstantin Belousov writes:
>=20
> >> But actually I shouldn't have to use LD_32_LIBRARY_PATH.
> >> I mean, it's ldconfig's job to configure the directories for
> >> locating the libraries.
> >>
> >> What is wrong here?
> > The library search order is LD_{32}_LIBRARY_PATH, then DT_RPATH from
> > the binary, then hints, then /lib:/usr/lib. So if rpath of the binary
> > contains /usr/local/lib, you get /usr/local/lib before hints.
> >=20
> > Rtld uses only the search path from the hints file. When a library with
> > the matched name found, rtld tries to load it. Regardless of the result
> > of the load attempt, further components of the search path list are not
> > tried.
> >=20
> > Look at the olvwm binary with readelf and see whether DT_RPATH specifies
> > /usr/local/lib.
>=20
> I've faced exactly same problem. What can be done other to rebuild
> of all such 32bit bit binaries to make them work for transition period?
> Should libmap32.conf help? It seems it does not.
No idea.
The presence of rpath in the binary indicates self-inflicted damage.
Just do not specify -rpath for linking. If you have such broken binary,
use LD_LIBRARY_PATH to override.
In fact, the ELF standard requires that DT_RPATH is not overridable by
LD_LIBRARY_PATH env variable, but DT_RUNPATH is. Currently our rtld
interpretes both DT_RPATH and DT_RUNPATH as overridable, thus violating
the standard and diverging from other ELF platforms.
Dragonfly fixed this.
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