message: Emscripten support
diff: # error Enoki requires a very recent version of AppleClang (XCode >= 10.0)
  # endif
  #elif defined(__clang__)
  -# if __clang_major__ < 7
  +# if __clang_major__ < 7 && !defined(EMSCRIPTEN)
  # error Enoki requires a very recent version of Clang/LLVM (>= 7.0)
  # endif
  #elif defined(__GNUC__)
  