brew install graphviz 报错 The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink include/graphviz /usr/local/include is not writable.

[Topppy]

权限问题, and没有include文件夹。

sudo mkdir include
sudo chown -R `whoami`:admin /usr/local/include
brew link graphviz

[Topppy]

顺便安利这个git，https://github.com/pahen/madge#graphviz-optional，可以生成依赖关系图。