CMake: added a warn message if cannot find numpy headers

Author: Clement Champetier

libraries/tuttle/CMakeLists.txt

@@ -145,6 +145,7 @@ if (TuttleBoost_FOUND)
         if(NUMPY_FOUND)
             include_directories(${NUMPY_INCLUDE_DIR})
         else()
+            message(WARNING "Cannot find numpy headers: TuttleOFX python binding will not use numpy.")
             set(SWIG_NUMPY_FLAG "-DWITHOUT_NUMPY")
         endif()
     endif()