message: c++ clang: Compile -Wno-null-dereference
  This is a mitigation for issue
  A proper fix is still
  needed.
  Closes
diff: @@ -149,6 +149,7 @@ cxx_add_compile_options(Clang
  --std=c++11
  -Wall
  -Werror
  + -Wno-null-dereference
  -Wno-unknown-warning-option
  -Wno-unused-local-typedefs)
  @@ -158,6 +159,7 @@ cxx_add_compile_options(AppleClang
  --std=c++11
  -Wall
  -Werror
  + -Wno-null-dereference
  -Wno-unknown-warning-option
  -Wno-unused-local-typedefs)
  