added: option to disable cppcheck

cmake/Scripts/IFEMTesting.cmake

@@ -189,7 +189,9 @@ macro(add_check_target)
   endforeach()
 
   find_program(CLANGCHECK_COMMAND clang-check)
-  find_program(CPPCHECK_COMMAND cppcheck)
+  if(NOT CMAKE_DISABLE_FIND_PACKAGE_CppCheck)
+    find_program(CPPCHECK_COMMAND cppcheck)
+  endif()
   foreach(src ${CHECK_SOURCES})
     get_filename_component(name ${src} NAME)
     get_filename_component(EXT ${src} EXT)