[CMake] Propagate fix to Config.cmake.in

Author: guparan

SofaPython3Config.cmake.in

@@ -26,8 +26,16 @@ set(PYTHON_VERSION "${Python_VERSION}" CACHE STRING "" FORCE)
 set(PYTHON_EXECUTABLE "${Python_EXECUTABLE}" CACHE FILEPATH "" FORCE)
 set(PYTHON_LIBRARIES "${Python_LIBRARIES}" CACHE STRING "" FORCE)
 set(PYTHON_INCLUDE_DIRS "${Python_INCLUDE_DIRS}" CACHE STRING "" FORCE)
-set(PYTHON_LIBRARY "${Python_LIBRARY}" CACHE INTERNAL "" FORCE)
-set(PYTHON_INCLUDE_DIR "${Python_INCLUDE_DIR}" CACHE INTERNAL "" FORCE)
+if(EXISTS "${Python_LIBRARY}")
+    set(PYTHON_LIBRARY "${Python_LIBRARY}" CACHE INTERNAL "" FORCE)
+elseif(EXISTS "${Python_LIBRARIES}")
+    set(PYTHON_LIBRARY "${Python_LIBRARIES}" CACHE INTERNAL "" FORCE)
+endif()
+if(EXISTS "${Python_INCLUDE_DIR}")
+    set(PYTHON_INCLUDE_DIR "${Python_INCLUDE_DIR}" CACHE INTERNAL "" FORCE)
+elseif(EXISTS "${Python_INCLUDE_DIRS}")
+    set(PYTHON_INCLUDE_DIR "${Python_INCLUDE_DIRS}" CACHE INTERNAL "" FORCE)
+endif()
 
 # Set the minimum pybind11 version to 2.3 (before that the pybind11::embed target did not exist)
 find_package(pybind11 2.3 CONFIG QUIET REQUIRED)