rtldi is an ELF program interpreter that makes it possible for
executables to use their own ld-linux.so.2 and libc.so.6 and
associated shared libraries, independent of the default versions
installed in /lib and any other executable. It facilitates the
simultaneous interoperation of programs that were originally
linked using different generations of glibc6. In theory it should
not be necessary, but in practice glibc6 has not always been
backward compatible.
