amd64/171250: ldd32 cannot find some i386 libraries

[Konstantin Belousov]

The following reply was made to PR amd64/171250; it has been noted by GNATS.

From: Konstantin Belousov <kostikbel at gmail.com>
To: David Naylor <naylor.b.david at gmail.com>
Cc: freebsd-gnats-submit at freebsd.org
Subject: Re: amd64/171250: ldd32 cannot find some i386 libraries
Date: Mon, 3 Sep 2012 15:26:50 +0300

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 On Mon, Sep 03, 2012 at 02:01:43PM +0200, David Naylor wrote:
 > On Sunday, 2 September 2012 17:57:55 Konstantin Belousov wrote:
 > > On Sun, Sep 02, 2012 at 12:42:43PM +0000, David Naylor wrote:
 > > > ldd32 does not find libraries, yet ldconfig lists them as known.
 > > >=20
 > > > # ldconfig -32 -r | grep directories
 > > >=20
 > > >         search directories:
 > > >         /usr/lib32:/usr/local/lib32:/usr/local/lib32/wine
 > >=20
 > > You should also look at the DT_RPATH and DT_RUNPATH tags in your binary.
 > > I suspect that there is some path hardcoded which points to the
 > > native 64bit libraries dir.
 >=20
 > # elfdump -d libcups.so.2
 > <snip/>
 > entry: 9
 >         d_tag: DT_RPATH
 >         d_val: /usr/lib:/usr/local/lib
 > <snip/>
 > # elfdump -a libcups.so.2 | grep DT_RUNPATH
 > ...
 >=20
 > As you suspected the paths are hardcoded.  However, since this is a 32bit=
 =20
 > library (and compiled in a i386 chroot) on a 64bit system I would have=20
 > expected the dynamic linker to translate /usr/lib to /usr/lib32, or to pr=
 epend=20
 > it. =20
 >=20
 > > If my theory holds, ths explicit use of LD_32_LIBRARY_PATH helps because
 > > the env var path has precedence over the path from tag.
 >=20
 > If my expectation, mentioned above, is wrong then please close this bug. =
  I'm=20
 > happy to continue using LD_32_LIBRARY_PATH to enduce the correct behaviou=
 r. =20
 >=20
 > Thanks for your quick reply.
 
 I have a symphathy to the idea that ld-elf32.so.1 should translate well-kno=
 wn
 pathes from DT_RPATH into their 32bit compat synonims. That is, /lib and
 /usr/lib probably should be interpreted as /lib32 and /usr/lib32.
 
 On the other hand, I do not know what to do with non-default pathes,
 that is /usr/local/lib in your case. Please note that some library can
 be find there for many reasons, and I cannot imagine a sane way to
 translate to 32bit compat path without involving some additional config.
 
 This is closely related to non-existent multiarch support in ports, which
 cannot even start happens without working cc -m32.
 
 I think your PR shall be postponed instead of being closed.
 
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