Build process for ompl.

-- The CXX compiler identification is GNU 8.3.0
-- The C compiler identification is GNU 8.3.0
-- 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
-- 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
-- Building Release
-- Found Eigen3: /usr/include/eigen3 (Required is at least version "2.91.0")
-- Found PkgConfig: /usr/bin/pkg-config (found version "1.6.1")
-- Checking for module 'flann'
--   Found flann, version 1.9.1
-- Found FLANN: flann;flann_cpp
-- Checking for module 'libspot'
--   Package 'libspot', required by 'virtual:world', not found
-- Could NOT find SPOT (missing: SPOT_LIBRARIES SPOT_INCLUDE_DIRS)
-- Found PY_numpy: /usr/lib/python2.7/site-packages/numpy
-- Could NOT find PY_pyplusplus (missing: PY_PYPLUSPLUS)
-- Found PY_pygccxml: /usr/lib/python2.7/site-packages/pygccxml
-- Found castxml: /usr/bin/castxml
-- The following features have been enabled:

 * OMPL_BUILD_TESTS, Whether to build the unit tests.
 * OMPL_BUILD_DEMOS, Whether to build the OMPL demo programs.

-- The following OPTIONAL packages have been found:

 * Threads, <https://en.wikipedia.org/wiki/POSIX_Threads>
   Pthreads is sometimes needed, depending on OS / compiler.
 * pypy, <http://pypy.org>
   Used to speed up the generation of python bindings.
 * OpenDE, <http://ode.org>
   The Open Dynamics Engine can be used as a "black box" for kinodynamic planning.
 * flann (required version >= 1.8.3), <https://github.com/mariusmuja/flann>
   If detetected, FLANN can be used for nearest neighbor queries by OMPL.
 * PkgConfig, <https://www.freedesktop.org/wiki/Software/pkg-config/>
   Used to find (compilation flags for) dependencies.
 * Python, <http://python.org>
   Used for python bindings.
 * castxml, <https://github.com/CastXML/CastXML>
   Used to generate Python bindings.
 * Doxygen, <http://doxygen.org>
   Used to create the OMPL documentation (i.e., http://ompl.kavrakilab.org).

-- The following REQUIRED packages have been found:

 * Eigen3, <http://eigen.tuxfamily.org>
   A linear algebra library used throughout OMPL.
 * Boost (required version >= 1.54), <http://boost.org>
   Used throughout OMPL for data serialization, graphs, etc.

-- The following features have been disabled:

 * OMPL_VERSIONED_INSTALL, Whether to install header files in
   <prefix>/include/ompl-X.Y/ompl, where X and Y are the major and minor
   version numbers
 * OMPL_BUILD_PYBINDINGS, Whether to build the Python bindings.
 * OMPL_BUILD_PYTESTS, Whether to build/run the python binding unit tests.

-- The following OPTIONAL packages have not been found:

 * MORSE, <https://www.openrobots.org/wiki/morse>
   OMPL includes a plugin for the MORSE Robot Simulation engine.
 * Triangle, <http://www.cs.cmu.edu/~quake/triangle.html>
   Used to create triangular decompositions of polygonal 2D environments.
 * spot, <http://spot.lrde.epita.fr>
   Used for constructing finite automata from LTL formulae.

-- The following Python modules were found:

 * numpy pygccxml

-- The following Python modules were NOT found:

 * pyplusplus

-- Configuring done
-- Generating done