Who have already successfully used homebrew to install the latest GCC 4.8.1 on Mac OS X(10.8.4)? I am always stuck when it runs to "make bootstrap".

```
$brew install gcc48
==> Downloading ftp://gcc.gnu.org/pub/gcc/releases/gcc-4.8.1/gcc-4.8.1.tar.bz2
Already downloaded: /Library/Caches/Homebrew/gcc48-4.8.1.tar.bz2
==> ../configure --build=x86_64-apple-darwin12.4.1 --prefix=/usr/local/Cellar/gc
==> make bootstrap

```