building roscpp

edit

All I need is roscpp libs for Android. I'm hoping there's a way I can build just these by themselves. So without knowing much about cmake, I did ...

$ git clone https://github.com/ros/ros_comm
$ cd ros_comm/ros_comm
$ mkdir build && cd build
$ cmake ..

And ended up with the following ...

$ cmake ..  
-- The C compiler identification is GNU 5.4.0  
-- The CXX compiler identification is GNU 5.4.0  
-- Check for working C compiler: /usr/bin/cc  
-- Check for working C compiler: /usr/bin/cc -- works  
-- Detecting C compiler ABI info  
-- Detecting C compiler ABI info - done  
-- Detecting C compile features  
-- Detecting C compile features - done  
-- Check for working CXX compiler: /usr/bin/c++  
-- Check for working CXX compiler: /usr/bin/c++ -- works  
-- Detecting CXX compiler ABI info  
-- Detecting CXX compiler ABI info - done   
-- Detecting CXX compile features  
-- Detecting CXX compile features - done  
CMake Error at CMakeLists.txt:3 (find_package):  
  By not providing "Findcatkin.cmake" in CMAKE_MODULE_PATH this project has  
  asked CMake to find a package configuration file provided by "catkin", but  
  CMake did not find one.  

  Could not find a package configuration file provided by "catkin" with any
  of the following names:

    catkinConfig.cmake
    catkin-config.cmake

  Add the installation prefix of "catkin" to CMAKE_PREFIX_PATH or set
  "catkin_DIR" to a directory containing one of the above files.  If "catkin"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!

Is there a way to build just roscpp? The reason I'm doing this is that I'd eventually like to get to a point where I can modify things to start cross compiling using aarch64 tools, even if that means I have to do the port to an arm-v8a arch. The docker image for Android doesn't support the toolchains I need.