cmake: fix python module

unittest/python/pybind11/CMakeLists.txt

@@ -12,7 +12,13 @@ if(CMAKE_VERSION VERSION_GREATER 3.11)
     add_library(cpp2pybind11 MODULE cpp2pybind11.cpp)
     target_link_libraries(cpp2pybind11 PRIVATE pinocchio_pywrap pybind11::module)
 
-   IF(BUILD_WITH_OPENMP_SUPPORT AND NOT LINK_PYTHON_INTERFACE_TO_OPENMP)
+    SET_TARGET_PROPERTIES(cpp2pybind11
+      PROPERTIES
+      PREFIX ""
+      SUFFIX ${PYTHON_EXT_SUFFIX}
+    )
+
+    IF(BUILD_WITH_OPENMP_SUPPORT AND NOT LINK_PYTHON_INTERFACE_TO_OPENMP)
       TARGET_LINK_LIBRARIES(cpp2pybind11 PRIVATE OpenMP::OpenMP_CXX)
     ENDIF()