ldd -u (Re: Solving recursive dependency disease in KDE-based packages)

[Adeodato Simó <dato@net.com.org.es>]

* Nathanael Nerode [Sun, 11 Dec 2005 07:35:41 -0500]:

>   To work out which libraries you're linked to which you don't actually need,
>   ldd -u <executable or library> is invaluable.

  This seems like not the case _at all_ to me (the "invaluable" bit):

    % ldd -u /usr/lib/amarok/amarokapp
    Unused direct dependencies:
            
            /usr/lib/libkutils.so.1
            /usr/lib/libkhtml.so.4
            /usr/X11R6/lib/libGL.so.1
            /lib/tls/i686/cmov/libpthread.so.0
            /usr/lib/libtunepimp.so.2
            /usr/lib/libmysqlclient.so.14
            /usr/lib/libz.so.1
            /lib/tls/i686/cmov/libcrypt.so.1
            /lib/tls/i686/cmov/libnsl.so.1
            /usr/lib/libpq.so.4
            /lib/tls/i686/cmov/libm.so.6
            /lib/libgcc_s.so.1

    % nm -D  /usr/lib/libpq.so.4 | grep PQconnectdb
    00009a90 T PQconnectdb

    % nm -D /usr/lib/amarok/amarokapp | grep PQconnectdb
             U PQconnectdb

  If this has an explanation (other than bogus ones like "some other
  dependency links against libpq.so.4", which I don't think it's the
  case, but mentioning as an example), please be my guest. For now, I
  plan on sticking to Henning Makholm's "libneeded" lintian check:

    % lintian -C libneeded amarok_1.3.7-1_i386.deb | grep usr/lib/amarok/amarokapp
    W: amarok: unneeded-explicit-linking usr/lib/amarok/amarokapp libz.so.1 libkutils.so.1

-- 
Adeodato Simó                                     dato at net.com.org.es
Debian Developer                                  adeodato at debian.org
 
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