readme: update macos installation instructions

This commit is contained in:
Andrew Kelley 2018-01-03 14:16:20 -05:00
parent 36ff26609b
commit 5c988cc722

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@ -154,6 +154,7 @@ make install
`ZIG_LIBC_LIB_DIR` and `ZIG_LIBC_STATIC_LIB_DIR` are unused.
```
brew install cmake
brew install llvm@5
brew outdated llvm@5 || brew upgrade llvm@5
mkdir build