Ubuntu's multisearch surprise

That is more a consequence of problems in the *nix linking model, where all shared objects land in a global namespace. It is desirable for a few things like the C library, but for most shared objects it causes more problems than it solves. It would be so nice if build-time linking had the equivalent of dlopen's RTLD_LOCAL flag. I think this should even work without breaking LD_PRELOAD, as preloaded libraries would still be loaded as "RTLD_GLOBAL" libraries, so would still override the subsequent RTLD_LOCAL loaded ones.