sudo brew是禁忌

on technology

因为曾经用过 sudo brew 的样子，所以 /usr/local/include 等folder被改成了root权限，下场：

~ % brew link gdbm libyaml
Linking /usr/local/Cellar/gdbm/1.10... Warning: Could not link gdbm. Unlinking...

Error: Could not symlink file: /usr/local/Cellar/gdbm/1.10/include/gdbm.h
/usr/local/include is not writable. You should change its permissions.

拯救办法：

~ % sudo chown -R $(whoami) /usr/local/include
~ % sudo chown -R $(whoami) /usr/local/lib
~ % brew link gdbm libyaml
Linking /usr/local/Cellar/gdbm/1.10... 6 symlinks created
Linking /usr/local/Cellar/libyaml/0.1.4... 5 symlinks created

总之：You should never have to use brew with sudo.