August 1996: dpkg-shlibdeps

When building a package the libraries used have to be insert in the dependency list in the package metadata. This can be done automatically using dpkg-shlibdeps:

each library packages provides a .shlibs file listing the libraries it provides and associated dependency information
dpkg-shlibdeps will scan the shlibs files and build a dependency list

libm 6 libc6 (>= 2.2.4-2)
libc 6 libc6 (>= 2.2.4-2)
libdb 2
libpython2.0 0.0 python2-base (>= 2.0-1)