Would it be possible to have the option, with CMake build, to use a
   more conventional soname, so that Linux distribution packagers
   (Debianers and RPM-based packagers such as me, for instance) be
   happy (i.e., have less extra code to write)?

So, like this (?):

% ls -l build/lib
total 1352
 libboost_iostreams-mt-d.a
 libboost_iostreams-mt-d.so -> libboost_iostreams-mt-d.so.1.41*
 libboost_iostreams-mt-d.so.1.41 -> libboost_iostreams-mt-d.so.1.41.0*
 libboost_iostreams-mt-d.so.1.41.0*
 libboost_iostreams-mt.a
 libboost_iostreams-mt.so -> libboost_iostreams-mt.so.1.41*
 libboost_iostreams-mt.so.1.41 -> libboost_iostreams-mt.so.1.41.0*
 libboost_iostreams-mt.so.1.41.0*