错误如下:

==> Downloading http://nginx.org/download/nginx-1.6.2.tar.gz

Already downloaded: /Library/Caches/Homebrew/nginx-1.6.2.tar.gz
==> ./configure --prefix=/usr/local/Cellar/nginx/1.6.2 --with-http_ssl_module --with-pcre --with-ipv6 --sbin-path=/usr/local/Cel
+ Darwin 14.0.0 x86_64
checking for C compiler ... not found

./configure: error: C compiler clang is not found

google了一番,有一篇文章提到,这是由于xcode没有安装command line tools导致的,但是,我在另外一台机器上同样用homebrew装nginx就没有问题, 检查了一下两边的xcode版本,发现6.0.1有问题,最新的6.1.1是OK的,于是升级了一下xcode,重新跑brew install nginx, 就OK了