cmake: fix flags

bindings/python/CMakeLists.txt

@@ -128,7 +128,7 @@ IF(BUILD_PYTHON_INTERFACE)
   SET(PKG_CONFIG_PYWRAP_REQUIRES "eigenpy >= 2.6.2")
   ADD_LIBRARY(${PYWRAP} SHARED ${${PYWRAP}_SOURCES} ${${PYWRAP}_HEADERS})
   IF(BUILD_WITH_OPENMP_SUPPORT)
-    TARGET_COMPILE_OPTIONS(${PYWRAP} PRIVATE ${OpenMP_CXX_COMPILE_OPTIONS})
+    TARGET_COMPILE_OPTIONS(${PYWRAP} PRIVATE ${OpenMP_CXX_FLAGS})
     TARGET_COMPILE_DEFINITIONS(${PYWRAP} PRIVATE -DPINOCCHIO_PYTHON_INTERFACE_WITH_OPENMP)
     TARGET_INCLUDE_DIRECTORIES(${PYWRAP} SYSTEM PRIVATE ${OpenMP_CXX_INCLUDE_DIR})
     IF(LINK_PYTHON_INTERFACE_TO_OPENM)