首先，我尝试了常见的rvm安装。
rvm install 1.9.2
但是，显示以下错误：
The provided compiler '/usr/bin/gcc' is LLVM based, it is not yet fully supported by ruby and gems, please read `rvm requirements`.
然后我跑
rvm requirements
并找到以下部分输出有用的
Right now Ruby requires gcc to compile, but Xcode 4.2 and later no longer ship with gcc. Instead they ship with llvm-gcc (to which gcc is a symlink) and clang, neither of which are supported for building Ruby. Xcode 4.1 was the last version to ship gcc, which was /usr/bin/gcc-4.2.
Xcode 4.1 and earlier:
- Ruby will build fine.
Xcode 4.2 and later (including Command Line Tools for Xcode):
- If you have gcc-4.2 (and friends) from an earlier Xcode version, Ruby will build fine.
- If you don't have gcc-4.2, you have two options to get it:
* Install apple-gcc42 from Homebrew
* Install osx-gcc-installer
Homebrew:
If you are using Homebrew, you can install the apple-gcc42 and required libraries from homebrew/dupes:
brew update
brew tap homebrew/dupes
brew install autoconf automake apple-gcc42
rvm pkg install openssl
This can live side by side with an existing Xcode 4.2+ install or Command Line Tools for Xcode.
所以我试过了：
brew update
brew tap homebrew/dupes
brew install autoconf automake apple-gcc42
然而，我收到以下错误
Warning: Could not link apple-gcc42. Unlinking...
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 apple-gcc42'
==> Summary
/usr/local/Cellar/apple-gcc42/4.2.1-5666.3: 104 files, 75M, built in 23 seconds
kanitw:shell.venturelab.com kanitw$ brew link apple-gcc42
Linking /usr/local/Cellar/apple-gcc42/4.2.1-5666.3... Warning: Could not link apple-gcc42. Unlinking...
Error: Could not symlink file: /usr/local/Cellar/apple-gcc42/4.2.1-5666.3/include/gcc
/usr/local/include is not writable. You should change its permissions.
什么是我最好的解决方案？我有点记得从某个地方我不应该使用sudo和brew，因为我会弄乱整个装置。
答案 0 :(得分：4)
您可以更改/ usr /本地目录所有者
sudo chown -R `whoami` /usr/local
但是，如果您安装了mysql，则会修复其所有者
sudo chown -R mysql:mysql /usr/local/mysql
答案 1 :(得分：3)
您应该运行brew doctor，然后相应地更改权限。可能还有其他问题。
答案 2 :(得分：0)
更改/usr/local目录的权限，然后重试。