message: Add warning about boost_thread link for the Mac GUDHI python module
diff: @@ -22,6 +22,15 @@ if(CYTHON_FOUND)
  set(GUDHI_CYTHON_EXTRA_COMPILE_ARGS "${GUDHI_CYTHON_EXTRA_COMPILE_ARGS}'-DBOOST_ALL_NO_LIB', ")
  set(GUDHI_CYTHON_EXTRA_COMPILE_ARGS "${GUDHI_CYTHON_EXTRA_COMPILE_ARGS}'-DBOOST_SYSTEM_NO_DEPRECATED', ")
  + # TODO: Something more clever could be done.
  + # This is because of https://github.com/CGAL/cgal/blob/master/Installation/include/CGAL/tss.h
  + # CGAL is using boost thread if thread_local is not ready (requires XCode 8 for Mac).
  + # The test in https://github.com/CGAL/cgal/blob/master/Installation/include/CGAL/config.h
  + # #if __has_feature(cxx_thread_local) || \
  + # ( (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 && __cplusplus >= 201103L ) || \
  + # ( _MSC_VER >= 1900 )
  + # #define CGAL_CAN_USE_CXX11_THREAD_LOCAL
  + # #endif
  if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
  add_gudhi_cython_lib(${Boost_THREAD_LIBRARY})
  set(GUDHI_CYTHON_LIBRARY_DIRS "${GUDHI_CYTHON_LIBRARY_DIRS}'${Boost_LIBRARY_DIRS}', ")
  