Thanks for reply. Here is required output.

root@debian:/usr/src/freeswitch.git# dpkg  -l |grep libtool
ii  libltdl-dev:amd64              2.4.2-1.11                  amd64        System independent dlopen wrapper for GNU libtool
ii  libltdl7:amd64                 2.4.2-1.11                  amd64        System independent dlopen wrapper for GNU libtool
ii  libtool                        2.4.2-1.11                  all          Generic library support script

root@debian:/usr/src/freeswitch.git# aptitude search libtool
i   libtool                                                                     - Generic library support script
p   libtool-bin                                                                 - Generic library support script (libtool binary)
p   libtool-doc                                                                 - Generic library support script
p   libtoolkit-perl                                                             - Keep your handy modules organized
p   libtools-cli-clojure                                                        - command line argument parser for Clojure
p   libtools-logging-clojure                                                    - Logging macros for Clojure
p   libtools-macro-clojure                                                      - Clojure tools for writing macros