problems with dpkg-shlibs

[Matthias Klose <doko@cs.tu-berlin.de>]

I built two shared libraries libscore and libpml. dh_shlibdeps calls
dpkg-shlibdeps and produces some warnings, which result in missing
shlibs control files.

$ dpkg-shlibdeps -Tdebian/substvars debian/tmp/usr/lib/libpml.so.1 debian/tmp/usr/lib/libscore.so.1 

dpkg-shlibdeps: warning: unable to find dependency information for shared library libscore (soname 1, path /usr/lib/libscore.so.1, dependency field Depends)

$ ldd debian/tmp/usr/lib/libscore.so.1 
        libm.so.6 => /lib/libm.so.6 (0x40015000)
        libc.so.6 => /lib/libc.so.6 (0x4002e000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x2aaaa000)
$ ldd debian/tmp/usr/lib/libpml.so.1 
        libscore.so.1 => /usr/lib/libscore.so.1 (0x40024000)
        libm.so.6 => /lib/libm.so.6 (0x40033000)
        libc.so.6 => /lib/libc.so.6 (0x4004c000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x2aaaa000)

How can I convince dpkg-shlibdeps

- to search for libscore in debian/tmp/usr/lib (using LD_LIBRARY_PATH
  yields unknown output: dpkg-shlibdeps: warning: unknown output from
  ldd on `debian/tmp/usr/lib/libpml.so.1': ` libscore.so.1 =>
  debian/tmp/usr/lib/libscore.so.1 (0x4001e000)

- to build a correct shlibs control file?

Is it ok to use the debian/shlibs.local file to provide the
information about the shared libraries, which the package provides
itself?

If yes, is it necessary to add the exact version information?

With this schema the ${shlibs:Depends} expands to a reference to the
package itself. Is this ok?

A final question, when to run ldconfig.

- in postinst configure ?
- in postrm upgrade ?

In the latter case, I get an error from ldconfig:

ldconfig: warning: can't open /usr/lib/libscore.so.1.dpkg-tmp (Too many levels of symbolic links), skipping


Thanks for any help.


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