# apt-get install -s libunity-api-dev:armhf 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  cpp-5-arm-linux-gnueabihf cpp-arm-linux-gnueabihf gcc-5-arm-linux-gnueabihf-base gcc-5-cross-base libasan2-armhf-cross libatomic1-armhf-cross libc6-armhf-cross libc6-dev-armhf-cross libconfig-auto-perl libconfig-inifiles-perl
  libfile-homedir-perl libfile-which-perl libgcc-5-dev-armhf-cross libgcc1-armhf-cross libgomp1-armhf-cross libio-string-perl libstdc++-5-dev-armhf-cross libstdc++6-armhf-cross libubsan0-armhf-cross libxml-libxml-perl
  libxml-namespacesupport-perl libxml-sax-base-perl libxml-sax-perl libxml-simple-perl libyaml-perl linux-libc-dev-armhf-cross
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  binutils:armhf cpp:armhf cpp-5:armhf g++:armhf g++-5:armhf gcc:armhf gcc-5:armhf libasan2:armhf libatomic1:armhf libboost-dev:armhf libboost1.58-dev:armhf libcc1-0:armhf libffi6:armhf libgcc-5-dev:armhf libglib2.0-0:armhf
  libglib2.0-data libgmp10:armhf libgomp1:armhf libisl15:armhf libmpc3:armhf libmpfr4:armhf libpcre3:armhf libselinux1:armhf libstdc++-5-dev:armhf libstdc++6:armhf libubsan0:armhf libunity-api0:armhf shared-mime-info xdg-user-dirs
  zlib1g:armhf
Suggested packages:
  binutils-doc:armhf cpp-doc:armhf gcc-5-locales:armhf g++-multilib:armhf g++-5-multilib:armhf gcc-5-doc:armhf libstdc++6-5-dbg:armhf gcc-multilib:armhf make:armhf manpages-dev:armhf autoconf:armhf automake:armhf libtool:armhf
  flex:armhf bison:armhf gdb:armhf gcc-doc:armhf gcc-5-multilib:armhf libgcc1-dbg:armhf libgomp1-dbg:armhf libitm1-dbg:armhf libatomic1-dbg:armhf libasan2-dbg:armhf liblsan0-dbg:armhf libtsan0-dbg:armhf libubsan0-dbg:armhf
  libcilkrts5-dbg:armhf libmpx0-dbg:armhf libquadmath0-dbg:armhf libboost-doc:armhf libboost1.58-doc:armhf libboost-atomic1.58-dev:armhf libboost-chrono1.58-dev:armhf libboost-context1.58-dev:armhf libboost-coroutine1.58-dev:armhf
  libboost-date-time1.58-dev:armhf libboost-exception1.58-dev:armhf libboost-filesystem1.58-dev:armhf libboost-graph1.58-dev:armhf libboost-graph-parallel1.58-dev:armhf libboost-iostreams1.58-dev:armhf libboost-locale1.58-dev:armhf
  libboost-log1.58-dev:armhf libboost-math1.58-dev:armhf libboost-mpi1.58-dev:armhf libboost-mpi-python1.58-dev:armhf libboost-program-options1.58-dev:armhf libboost-python1.58-dev:armhf libboost-random1.58-dev:armhf
  libboost-regex1.58-dev:armhf libboost-serialization1.58-dev:armhf libboost-signals1.58-dev:armhf libboost-system1.58-dev:armhf libboost-test1.58-dev:armhf libboost-thread1.58-dev:armhf libboost-timer1.58-dev:armhf
  libboost-wave1.58-dev:armhf libboost1.58-tools-dev:armhf libmpfrc++-dev:armhf libntl-dev:armhf libstdc++-5-doc:armhf
The following packages will be REMOVED:
  binutils binutils-arm-linux-gnueabihf cpp cpp-5 g++ g++-5 g++-5-arm-linux-gnueabihf g++-arm-linux-gnueabihf gcc gcc-5 gcc-5-arm-linux-gnueabihf gcc-arm-linux-gnueabihf
The following NEW packages will be installed:
  binutils:armhf cpp:armhf cpp-5:armhf g++:armhf g++-5:armhf gcc:armhf gcc-5:armhf libasan2:armhf libatomic1:armhf libboost-dev:armhf libboost1.58-dev:armhf libcc1-0:armhf libffi6:armhf libgcc-5-dev:armhf libglib2.0-0:armhf
  libglib2.0-data libgmp10:armhf libgomp1:armhf libisl15:armhf libmpc3:armhf libmpfr4:armhf libpcre3:armhf libselinux1:armhf libstdc++-5-dev:armhf libstdc++6:armhf libubsan0:armhf libunity-api-dev:armhf libunity-api0:armhf
  shared-mime-info xdg-user-dirs zlib1g:armhf
0 upgraded, 31 newly installed, 12 to remove and 0 not upgraded.