Mac OS X：安装并链接gcc 6.2与Homebrew，但gcc --version仍然说4.9.2 [英] Mac OS X: Installed and linked gcc 6.2 with Homebrew, but gcc --version still says 4.9.2

问题描述

在OS X 10.11.6上，我使用自制软件安装了gcc 6.2.0。它住在usr / local / Cellar / gcc / 6.2.0 / bin中。在获得链接后（它不会自动执行此操作），我在那里尝试从这个其他线程创建一个别名

ln -s gcc-6 gcc
然后gcc --version给我
cc（GCC）4.9.2 20141029（预发行版）
版权所有（C）2014 Free Software Foundation， Inc.
这是免费软件;请参阅复制条件的来源。没有任何b $ b保修;甚至不适用于适销性或针对特定用途的适用性。

所有这些都是因为尝试安装事件会因为-rdynamic标志而崩溃，我希望在一个更新的版本中修复。

解决方案

你创建了正确的目标名称（ gcc ），但忘了将 PATH 设置到新安装的位置（或将其设置在系统路径后面）。

令人困惑的是您的系统已经安装了一个gcc版本。您必须重写默认路径，以便您的 gcc 命令优先。

• <编辑你的〜/ .profile 文件并检查PATH调整。最后添加一行：
  
  $ b

  export PATH = / usr / local / Cellar / gcc / 6.2.0 / bin：$ PATH




然后打开一个新终端并确保哪个gcc 打印

/usr/local/Cellar/gcc/6.2.0/bin/gcc

On OS X 10.11.6, I installed gcc 6.2.0 using homebrew. It lives over in usr/local/Cellar/gcc/6.2.0/bin. After getting it to link (it didn't do this automagically), I cd there and try the solution from this other thread to create an alias

ln -s gcc-6 gcc then gcc --version gives me cc (GCC) 4.9.2 20141029 (prerelease) Copyright (C) 2014 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

All this is because trying to install things crashes because of -rdynamic flags, that I hope is fixed in a newer version.

解决方案

You created the symlink with the proper target name (gcc) but forgot to set the PATH to your newly installed location (or set it after the system path).

What's confusing is that your system already has a version of gcc installed. You have to override the default path so your gcc command comes first.

• edit your ~/.profile file and check PATH adjustment. Add a line in the end which contains:

  export PATH=/usr/local/Cellar/gcc/6.2.0/bin:$PATH

Then open a new terminal and ensure that which gcc prints

/usr/local/Cellar/gcc/6.2.0/bin/gcc

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