Follow the official document : <a target="_blank" href="https://github.com/ruby/ruby/blob/master/doc/yjit/yjit.md">ruby/yjit</a>
<h2 id="heading-step">Step</h2>
<ol>
<li>clone the repo and enter the directory
<pre><code class="lang-bash"> git clone https://github.com/ruby/ruby yjit
 cd yjit
</code></pre>
</li>
<li>install the deps first:
<pre><code class="lang-bash"> brew install openssl readline libyaml
</code></pre>
</li>
<li>build:
<pre><code class="lang-bash"> ./autogen.sh
 ./configure --enable-yjit=dev --prefix=$HOME/.rbenv/versions/ruby-yjit --disable-install-doc --with-opt-dir="$(brew --prefix openssl):$(brew --prefix readline):$(brew --prefix libyaml)"
 make -j install
</code></pre>
 I'm use <code>rbenv</code>, so I change the <code>--prefix</code> option to the rbenv versions directory.
</li>
<li>Use
<pre><code class="lang-bash"> rbenv versions
 rbenv global ruby-yjit
</code></pre>
</li>
</ol>
<h2 id="heading-problem">Problem</h2>
<ol>
<li>Haven't <code>id.h</code>
 Solve: rebuild ruby-yjit and success
</li>
<li>Bison version it to low
 Solve: install the lastest version Bison and add export it:
<pre><code class="lang-bash"> brew install bison
 export PATH="/opt/homebrew/opt/bison/bin:$PATH"
</code></pre>
</li>
</ol>

Follow the official document : [ruby/yjit](https://github.com/ruby/ruby/blob/master/doc/yjit/yjit.md)

## Step

1. clone the repo and enter the directory
    
    ```bash
    git clone https://github.com/ruby/ruby yjit
    cd yjit
    ```
    
2. install the deps first:
    
    ```bash
    brew install openssl readline libyaml
    ```
    
3. build:
    
    ```bash
    ./autogen.sh
    ./configure --enable-yjit=dev --prefix=$HOME/.rbenv/versions/ruby-yjit --disable-install-doc --with-opt-dir="$(brew --prefix openssl):$(brew --prefix readline):$(brew --prefix libyaml)"
    make -j install
    ```
    
    I'm use `rbenv`, so I change the `--prefix` option to the rbenv versions directory.
    
4. Use
    
    ```bash
    rbenv versions
    rbenv global ruby-yjit
    ```
    

## Problem

1. Haven't `id.h`
    
    Solve: rebuild ruby-yjit and success
    
2. Bison version it to low
    
    Solve: install the lastest version Bison and add export it:
    
    ```bash
    brew install bison
    export PATH="/opt/homebrew/opt/bison/bin:$PATH"
    ```

Build Yjit on my mac

Step

Problem