已安装GCC，但未找到命令

我是linux新手，我很难让它工作。 我卸载并安装了几次gcc。现在，当我运行

gcc--version

时，它仍然显示

zsh:command not found

当我转到

/usr/local/bin

并运行

ls-l

时，我发现gcc有多个版本

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

我运行了“brew医生”，得到以下输出

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

---

我尝试运行了

echo export PATH='/usr/local/bin:$PATH'>~/.bash_profile

，重新启动了终端并再次运行了

brew doctor

，但它仍然会出现同样的问题。我在这里完全迷路了。有人能用这个来指导我吗？我做错了什么？提前感谢。

您没有配置正确的配置文件。看看这个：

检查gcc是否正确安装：

brew install gcc
brew link gcc48

创建brew创建的链接的别名，并将其放入.zshrc中

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

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

cd/usr/local/bin
ls cpp*
ls c++*
别名gcc=/usr/local/bin/

您正在使用

zsh

，但要修改

.bash\u配置文件

。这可能不适合您可能安装了gcc，但您没有一个名为

gcc

的符号链接指向其中一个。选择您想要的gcc版本，并创建一个符号链接。e、 g.

ln/usr/bin/gcc/path/to/cillar/gcc-4.8/gcc

我运行，

ln/usr/bin/gcc/usr/local/cillar/gcc/4.8.3\u 1/bin/gcc-4.8

它说

ln:/usr/bin/gcc：没有这样的文件或目录。我访问了
/usr/bin
，但找不到gcc。为什么要标记[linux]？谢谢，这帮助我解决了路径问题。但仍然无法链接gcc：（运行
which gcc
和
gcc--version
。这两个命令的输出是什么？您使用的发行版是什么？它说
gcc not found
。我想我必须像前面的注释一样创建一个符号链接。我也尝试过这么做。。参考我上面的注释等一下，我想您解决了路径问题了吗？切换到bash（`bash'））然后运行相同的两个命令，我得到了相同的输出