我正在尝试在第二台计算机上安装我的Rails应用程序。但是当我运行bundle install时，我遇到了有关json gem的错误：
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby extconf.rb
/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby: invalid option -D (-h will show valid options) (RuntimeError)
Gem files will remain installed in /Users/feuerball/.rvm/gems/ruby-2.0.0-p195/gems/json-1.8.0 for inspection.
Results logged to /Users/feuerball/.rvm/gems/ruby-2.0.0-p195/gems/json-1.8.0/ext/json/ext/generator/gem_make.out
An error occurred while installing json (1.8.0), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.0'` succeeds before bundling.
这台电脑运行的是Mac OS X 10.8.4，安装了Xcode 4.6.3和最新的命令行工具。
我使用rvm安装了最新的ruby:
$ rvm -v
rvm 1.21.2 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]
$ ruby -v
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-darwin12.4.0]
$ gem -v
2.0.3
当我尝试使用gem install json安装json gem时，我几乎得到相同的错误：
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby extconf.rb
/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby: invalid option -D (-h will show valid options) (RuntimeError)
Gem files will remain installed in /Users/feuerball/.rvm/gems/ruby-2.0.0-p195/gems/json-1.8.0 for inspection.
Results logged to /Users/feuerball/.rvm/gems/ruby-2.0.0-p195/gems/json-1.8.0/ext/json/ext/generator/gem_make.out
尝试使用
sudo安装没有改变任何内容。
我卸载并重新安装了homebrew、rvm、ruby和命令行工具，但仍然无济于事。
更新
/Users/feuerball/.rvm/gems/ruby-2.0.0-p195/gems/json-1.8.0/ext/json/ext/generator/gem_make.out的内容：/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby extconf.rb
/Users/feuerball/.rvm/rubies/ruby-2.0.0-p195/bin/ruby: invalid option -D (-h will show valid options) (RuntimeError)
GCC版本：
$ gcc -v
Using built-in specs.
Target: i686-apple-darwin11
Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2336.11~182/src/configure --disable-checking --enable-werror --prefix=/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2336.11~182/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
更新2
我进行了一次全新的OS X、Xcode、命令行工具、Homebrew、rvm和Ruby安装。Ruby现在是补丁级别247，但该问题仍然存在。真是浪费时间...如果重要的话：rvm与ruby一起安装了json 1.7.7
更新3
似乎我的机器无法安装所有本地扩展。gem install bcrypt-ruby会出现相同的错误信息。