最新的emscripten使用什么版本的LLVM?

emscripten的最新版本使用clang版本4:

$ emcc -v
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 1.37.21
clang version 4.0.0 (https://github.com/kripken/emscripten-fastcomp-clang.git 974b55fd84ca447c4297fc3b00cefb6394571d18) (https://github.com/kripken/emscripten-fastcomp.git 087c6b7b18b7b769d4ad8f2ac3e0dd0ae6b924c2) (emscripten 1.37.21 : 1.37.21)
Target: x86_64-apple-darwin16.7.0
Thread model: posix

documented in this gist

另一个好的替代方案是wasm工具链项目:

https://github.com/tpimh/wasm-toolchain

$ ./clang --version
clang version 6.0.0 (http://llvm.org/git/clang.git 9411957410813aeefc1bb299abcb856ce1ef8aae) (http://llvm.org/git/llvm.git 68b21d6108df63d65d6735e9686d53cca844e37a)
Target: x86_64-apple-darwin16.7.0
Thread model: posix