message: Fix dictionary problem with GCCv7
diff: @@ -146,6 +146,12 @@ else()
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=delete-non-virtual-dtor")
  endif()
  + # Turn OFF some -Werrors
  + check_cxx_compiler_flag(-Wno-error=strict-aliasing CXX_COMPILER_STRICT_ALIASING)
  + if(CXX_COMPILER_STRICT_ALIASING)
  + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=strict-aliasing")
  + endif()
  +
  # Turn on "all" warnings, but skip missing braces warning
  check_cxx_compiler_flag(-Wall CXX_COMPILER_HAS_WALL)
  if(CXX_COMPILER_HAS_WALL)
  