message: no python documentation generation if POT is not found
diff: @@ -65,6 +65,9 @@ if(PYTHONINTERP_FOUND)
  if(SCIPY_FOUND)
  add_gudhi_debug_info("Scipy version ${SCIPY_VERSION}")
  endif()
  + if(OT_FOUND)
  + add_gudhi_debug_info("POT version ${OT_VERSION}")
  + endif()
  set(GUDHI_PYTHON_EXTRA_COMPILE_ARGS "${GUDHI_PYTHON_EXTRA_COMPILE_ARGS}'-DBOOST_RESULT_OF_USE_DECLTYPE', ")
  set(GUDHI_PYTHON_EXTRA_COMPILE_ARGS "${GUDHI_PYTHON_EXTRA_COMPILE_ARGS}'-DBOOST_ALL_NO_LIB', ")
  @@ -383,6 +386,7 @@ if(PYTHONINTERP_FOUND)
  if(MATPLOTLIB_FOUND)
  if(NUMPY_FOUND)
  if(SCIPY_FOUND)
  + if(OT_FOUND)
  if(NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
  set (GUDHI_SPHINX_MESSAGE "Generating API documentation with Sphinx in ${CMAKE_CURRENT_BINARY_DIR}/sphinx/")
  # User warning - Sphinx is a static pages generator, and configured to work fine with user_version
  @@ -409,6 +413,10 @@ if(PYTHONINTERP_FOUND)
  message("++ Python documentation module will not be compiled because it requires a Eigen3 and CGAL version >= 4.11.0")
  set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  endif(NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
  + else(OT_FOUND)
  + message("++ Python documentation module will not be compiled because POT was not found")
  + set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  + endif(OT_FOUND)
  else(SCIPY_FOUND)
  message("++ Python documentation module will not be compiled because scipy was not found")
  set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "python-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
  