选择mp-gcc 47表示“gcc”失败

Question

遵循这个https://stackoverflow.com/a/8372496/747050，我尝试选择gcc版本，安装了macport。

$port select --list gcc
Available versions for gcc:
    mp-gcc47
    none (active)

$port select --set gcc mp-gcc47
Selecting 'mp-gcc47' for 'gcc' failed: 
  symlink: /opt/local/etc/select/gcc/current -> mp-gcc47: file already exists

我该怎么办？

Answer 1

解决办法很简单。需要删除所述文件。

$ sudo mv /opt/local/etc/select/gcc/current /opt/local/etc/select/gcc/current_saved
Password:
$ port select --set gcc mp-gcc47
Selecting 'mp-gcc47' for 'gcc' succeeded. 'mp-gcc47' is now active.