message: To fix compilation issue for intel OSX compiler
  o To prevent the compilation issue on OSX with the intel compiler suite.  The
  error was found with icpc version 15.0.3.187 where the "__clang_version__" was
  not defined correctly, while "__clang__" was.
diff: @@ -7526,10 +7526,10 @@ class basic_json
  result["platform"] = "unknown";
  #endif
  -#if defined(__clang__)
  - result["compiler"] = {{"family", "clang"}, {"version", __clang_version__}};
  -#elif defined(__ICC) || defined(__INTEL_COMPILER)
  +#if defined(__ICC) || defined(__INTEL_COMPILER)
  result["compiler"] = {{"family", "icc"}, {"version", __INTEL_COMPILER}};
  +#elif defined(__clang__)
  + result["compiler"] = {{"family", "clang"}, {"version", __clang_version__}};
  #elif defined(__GNUC__) || defined(__GNUG__)
  result["compiler"] = {{"family", "gcc"}, {"version", std::to_string(__GNUC__) + "." + std::to_string(__GNUC_MINOR__) + "." + std::to_string(__GNUC_PATCHLEVEL__)}};
  #elif defined(__HP_cc) || defined(__HP_aCC)
  