macos - 如何使用brew链接到新的gcc版本？

Question

我刚刚通过运行brew update和brew upgrade获得了一个新的gcc版本。 brew提示brew link没有成功完成:

~
✓  brew upgrade
==> Upgrading 1 outdated package, with result:
gcc 4.8.2_1
==> Upgrading gcc
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/gcc-4.8.2_1
######################################################################## 100,0%
==> Pouring gcc-4.8.2_1.mavericks.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
You can try again using:
  brew link gcc

Possible conflicting files are:
/usr/local/bin/gfortran -> /usr/local/Cellar/gfortran/4.8.2/bin/gfortran
/usr/local/share/man/man1/gfortran.1 -> /usr/local/Cellar/gfortran/4.8.2/share/man/man1/gfortran.1 

所以我手动运行了 brew link gcc:

~
✓  brew link gcc
Linking /usr/local/Cellar/gcc/4.8.2... 25 symlinks created

现在，当我告诉brew进行清理时，会收到以下警告:

~
✓  brew cleanup
Warning: Skipping (old) /usr/local/Cellar/gcc/4.8.2 due to it being linked

我的地窖里有两个gcc版本:

~
✓  ls /usr/local/Cellar/gcc
4.8.2   4.8.2_1

我两个都需要吗？我想删除旧版本。我该如何实现？

Answer 1

我通过运行以下命令解决了

brew unlink gcc
brew rm gfortran
brew cleanup
brew link gcc

似乎gfortran已链接到旧版gcc版本。