Enable Catch2 3.7.1 usage only with c++14 standard or higher

CMakeLists.txt

@@ -805,11 +805,6 @@ VP_OPTION(WITH_STBIMAGE   ""           ""    "Use std_image built-in third-party
 VP_OPTION(WITH_TINYEXR    ""           ""    "Use tinyexr built-in third-party" "" ON)
 
 if(VISP_CXX_STANDARD LESS VISP_CXX_STANDARD_11)
-  if(WITH_CATCH2)
-    message(WARNING "catch2 3rd party needs at least c++11 standard compiler flag while you have set c++${USE_CXX_STANDARD}. Thus we disable catch2 usage turning WITH_CATCH2=OFF.")
-    unset(WITH_CATCH2)
-    set(WITH_CATCH2 OFF CACHE BOOL "Use catch2 built-in library" FORCE)
-  endif()
   if(WITH_POLOLU)
     message(WARNING "pololu 3rd party needs at least c++11 standard compiler flag while you have set c++${USE_CXX_STANDARD}. Thus we disable pololu usage turning WITH_POLOLU=OFF.")
     unset(WITH_POLOLU)
@@ -827,6 +822,14 @@ if(VISP_CXX_STANDARD LESS VISP_CXX_STANDARD_11)
   endif()
 endif()
 
+if(VISP_CXX_STANDARD LESS VISP_CXX_STANDARD_14)
+  if(WITH_CATCH2)
+    message(WARNING "catch2 3rd party needs at least c++14 standard compiler flag while you have set c++${USE_CXX_STANDARD}. Thus we disable catch2 usage turning WITH_CATCH2=OFF.")
+    unset(WITH_CATCH2)
+    set(WITH_CATCH2 OFF CACHE BOOL "Use catch2 built-in library" FORCE)
+  endif()
+endif()
+
 # ----------------------------------------------------------------------------
 # Check for specific functions. Should be after cxx standard detection in VISPDetectCXXStandard.cmake and
 # potential modification depending on pcl, realsense2, libfranka