Very strange libtool logic

Hello,

Recently i detected the following very strange build logic, which apparently
stems from libtool:
While building the db-4.2.52 distribution with gcc-3.3.3 and only a static
libstdc++, the build system extracts all objects from libstdc++.a to a
temporary directory and adds them to the Berkeley DB C++ archive
libdb_cxx-4.2.a.
What is the reason for this unbelievable action and how can it be avoided?

Greetings

Franz