已安装GCC，但找不到命令

Question

我是Linux新手，而且我很难尝试完成这项工作。 我卸载并安装了gcc几次。现在，当我运行gcc --version时，它仍然表示zsh: command not found。

当我去/usr/local/bin和运行ls -l我找到GCC的多个版本

lrwxr-xr-x 1 ps032791 admin        33 Jul 2 2014 c++-4.6 -> ../Cellar/gcc46/4.6.4/bin/c++-4.6 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 11:58 c++-4.7 -> ../Cellar/gcc47/4.7.3/bin/c++-4.7 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 15:27 c++-4.8 -> ../Cellar/gcc/4.8.3_1/bin/c++-4.8 
lrwxr-xr-x 1 ps032791 admin        32 Apr 6 15:19 cloog -> ../Cellar/cloog/0.18.1/bin/cloog 
lrwxr-xr-x 1 ps032791 admin        33 Jul 2 2014 cpp-4.6 -> ../Cellar/gcc46/4.6.4/bin/cpp-4.6 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 11:58 cpp-4.7 -> ../Cellar/gcc47/4.7.3/bin/cpp-4.7 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 15:27 cpp-4.8 -> ../Cellar/gcc/4.8.3_1/bin/cpp-4.8 
lrwxr-xr-x 1 ps032791 admin        28 May 29 2014 erb -> ../Cellar/ruby/2.1.2/bin/erb 
lrwxr-xr-x 1 ps032791 admin        33 Jul 2 2014 g++-4.6 -> ../Cellar/gcc46/4.6.4/bin/g++-4.6 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 11:58 g++-4.7 -> ../Cellar/gcc47/4.7.3/bin/g++-4.7 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 15:27 g++-4.8 -> ../Cellar/gcc/4.8.3_1/bin/g++-4.8 
-rw-r--r-- 1 ps032791 admin        0 Apr 6 13:23 gcc-4.2 
lrwxr-xr-x 1 ps032791 admin        33 Jul 2 2014 gcc-4.6 -> ../Cellar/gcc46/4.6.4/bin/gcc-4.6 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 11:58 gcc-4.7 -> ../Cellar/gcc47/4.7.3/bin/gcc-4.7 
lrwxr-xr-x 1 ps032791 admin        33 Apr 6 15:27 gcc-4.8 -> ../Cellar/gcc/4.8.3_1/bin/gcc-4.8 
lrwxr-xr-x 1 ps032791 admin        36 Apr 6 11:58 gcc-ar-4.7 -> ../Cellar/gcc47/4.7.3/bin/gcc-ar-4.7 
lrwxr-xr-x 1 ps032791 admin        36 Apr 6 15:27 gcc-ar-4.8 -> ../Cellar/gcc/4.8.3_1/bin/gcc-ar-4.8 
lrwxr-xr-x 1 ps032791 admin        36 Apr 6 11:58 gcc-nm-4.7 -> ../Cellar/gcc47/4.7.3/bin/gcc-nm-4.7 
lrwxr-xr-x 1 ps032791 admin        36 Apr 6 15:27 gcc-nm-4.8 -> ../Cellar/gcc/4.8.3_1/bin/gcc-nm-4.8 
lrwxr-xr-x 1 ps032791 admin        40 Apr 6 11:58 gcc-ranlib-4.7 -> ../Cellar/gcc47/4.7.3/bin/gcc-ranlib-4.7 
lrwxr-xr-x 1 ps032791 admin        40 Apr 6 15:27 gcc-ranlib-4.8 -> ../Cellar/gcc/4.8.3_1/bin/gcc-ranlib-4.8 

我跑'酿造医生，我得到下面的输出，

Warning: You have MacPorts or Fink installed: 
    /opt/local/bin/port 

This can cause trouble. You don't have to uninstall them, but you may want to 
temporarily move them out of the way, e.g. 

    sudo mv /opt/local ~/macports 

Warning: Your Homebrew is outdated. 
You haven't updated for at least 24 hours, this is a long time in brewland! 
To update Homebrew, run `brew update`. 

Warning: You have unlinked kegs in your Cellar 
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on 
those kegs to fail to run properly once built. Run `brew link` on these: 

    gcc48 

Warning: You have uncommitted modifications to Homebrew 
If this a surprise to you, then you should stash these modifications. 
Stashing returns Homebrew to a pristine state but can be undone 
should you later need to do so for some reason. 
    cd /usr/local/Library && git stash && git clean -d -f 

Warning: /usr/bin occurs before /usr/local/bin 
This means that system-provided programs will be used instead of those 
provided by Homebrew. The following tools exist at both paths: 

    erb 
    gem 
    git 
    git-cvsserver 
    git-receive-pack 
    git-shell 
    git-upload-archive 
    git-upload-pack 
    irb 
    rake 
    rdoc 
    ri 
    ruby 
    testrb 

Consider setting your PATH so that /usr/local/bin 
occurs before /usr/bin. Here is a one-liner: 
    echo export PATH='/usr/local/bin:$PATH' >> ~/.bash_profile 

我试图运行echo export PATH='/usr/local/bin:$PATH' >> ~/.bash_profile ，重新启动终端，并再次运行brew doctor，它仍抱怨同样的事情。我完全迷失在这里。有人可以用这个指导我吗？我究竟做错了什么？提前致谢。

Answer 1

您没有配置正确的配置文件。检查了这一点：

https://wiki.archlinux.org/index.php/Zsh#Configuring_.24PATH

检查GCC安装正确：

brew install gcc 
brew link gcc48 

创建一个别名任何链接BREW创建并把它放在你的.zshrc

cd /usr/local/bin 
ls cpp* 
ls c++* 

alias gcc=/usr/local/bin/<whatever_link_you_found>