[sr #107416] relink with a DESTDIR install mistakenly links against old installed libraries rather than those in DESTDIR

[Tim Mooney]

URL:
  <http://savannah.gnu.org/support/?107416>

                 Summary: relink with a DESTDIR install mistakenly links
against old installed libraries rather than those in DESTDIR
                 Project: GNU Libtool
            Submitted by: enchanter
            Submitted on: Fri 02 Jul 2010 02:29:31 PM CDT
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: None

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Details:

This issue affects all versions of libtool from 2.2.10 going back to the
initial versions that added support for DESTDIR installs.  

Consider a package "package-1.0", which includes two libraries "liba" and
"libb".  liba has a function named "a_1", and libb requires this function and
is linked against liba.  package-1.0 gets installed on a system and everyone
is happy.

Now package-2.0 comes out.  "liba" now has a new function "a_2", and libb now
uses both "a_1" and "a_2".

When compiling package-2.0, libb will correctly link against the liba that's
included in package-2.0.

If you just "make install", libb will be correctly relinked, because liba
will get installed in the final location first.

HOWEVER, if you do a "DESTDIR" install, the relink step for libb will fail,
because libtool doesn't prepend the DESTDIR library directory to the library
search path, so when libb is relinked, it finds the liba from package-1.0
that's already installed on the system.  Since the 1.0 version of liba doesn't
have function "a_2", the relink fails.

This issue has been reported on the libtool mailing list several times, e.g.

http://lists.gnu.org/archive/html/libtool/2003-02/msg00098.html

http://lists.gnu.org/archive/html/libtool/2003-05/msg00022.html

http://lists.gnu.org/archive/html/libtool/2009-11/msg00010.html

http://lists.gnu.org/archive/html/libtool/2002-11/msg00112.html

I can find more instances in the mailing lists if necessary, but you get the
point.  It's affected a lot of people, and it's a real hassle for people that
do software packaging with something like RPM or apt.




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