blocks|key|142572|text|Ruby已经解决了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|142573|https://bugs.ruby-lang.org/issues/9624|offset|length|142574|现在我们只需要等待苹果将他们的ruby版本(2.0.0p247)更新到最新版本(2.0.0p451)之后的版本，这个版本还没有出来……(或brew/macport+it)|142575|更新(2014-05-15)：Mavericks+10.9.3将ruby更新为ruby+2.0.0p451+(2014-02-24+revision+45167)+[universal.x86_64-darwin13]，这似乎解决了问题。|style|CODE|142576|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|12|0|0|0|13|1Y|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@$D|Z|E|10|J|K]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|C]]]]

Issue already addressed by Ruby:

<a href="https://bugs.ruby-lang.org/issues/9624" rel="nofollow noreferrer">https://bugs.ruby-lang.org/issues/9624</a>

now we just need to wait for Apple to update their ruby version (2.0.0p247) to the one after the latest one (2.0.0p451) which hasn't come out yet ...
(or brew/macport it)

Update (2014-05-15): Mavericks 10.9.3 updates ruby to
<code>
ruby 2.0.0p451 (2014-02-24 revision 45167) [universal.x86_64-darwin13]
</code>
And this seems to resolves the issue.

blocks|key|4649164|text|要解决这个问题，您可以安装最新版本的ruby，如@Sash所述。您可以使用以下命令来执行此操作。如果您已经安装了rvm，则不需要重新安装。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4649165|#Install+rvm
\curl+-sSL+https://get.rvm.io+%7C+bash+-s+stable

#Install+ruby+version+2.0.0-p451
rvm+install+ruby-2.0.0-p451

#Print+ruby+version+to+verify+that+it+was+installed+successfully
ruby+-v

#Install+json+gem
sudo+gem+install+json|code-block|syntax|javascript|4649166|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To address the issue you can install the most recent version of ruby as described by @Sash. You can use the following commands to do so. In case you already have installed rvm, you don't need to reinstall it.

<pre><code>#Install rvm
\curl -sSL https://get.rvm.io | bash -s stable

#Install ruby version 2.0.0-p451
rvm install ruby-2.0.0-p451

#Print ruby version to verify that it was installed successfully
ruby -v

#Install json gem
sudo gem install json
</code></pre>

blocks|key|4649180|text|一行代码来解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4649181|curl+https://gist.githubusercontent.com/Paulche/9713531/raw/1e57fbb440d36ca5607d1739cc6151f373b234b6/gistfile1.txt+%7C+sudo+patch+/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin13/rbconfig.rb|code-block|syntax|javascript|4649182|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

One-liner to fix that

<pre><code>curl https://gist.githubusercontent.com/Paulche/9713531/raw/1e57fbb440d36ca5607d1739cc6151f373b234b6/gistfile1.txt | sudo patch /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin13/rbconfig.rb
</code></pre>

blocks|key|4649201|text|@Muncken已经一一提供了安装gem的答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4649202|ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future+gem+install+GemName|code-block|syntax|javascript|4649203|根据Muncken的回答，我已经尝试过在使用bundle+install时也可以使用它|offset|length|style|CODE|4649204|ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future+bundle+install|4649205|entityMap^0|0|0|M|E|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

@Muncken has already provided an answer to install gem one by one:

<pre><code>ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install GemName
</code></pre>

Base on Muncken's answer, I've tried that it also works when using <code>bundle install</code>

<pre><code>ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future bundle install
</code></pre>

blocks|key|4649227|text|在我的例子中，我实际上遇到了类似的问题，但不是在系统ruby上，而是在从OSX+10.8通过rvm安装的rubies上，并且在升级到OSX+10.9之后出现了问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4649228|一个简单的重装就可以了：rvm+reinstall+ruby-2.1.1|offset|length|style|CODE|4649229|entityMap^0|0|C|O|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

In my case, I actually have similar problem, but not on the system ruby, but on rubies installed by rvm from OSX 10.8, and it has issues after upgrading to OSX 10.9.

A simple reinstall works: <code>rvm reinstall ruby-2.1.1</code>

blocks|key|142700|text|在OSX10.10上，我在运行rails+new+firstapp时遇到了几个问题，例如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|142701|ERROR:++Error+installing+json:
ERROR:+Failed+to+build+gem+native+extension.
fatal+error:+'ruby/config.h'+file+not+found|code-block|syntax|javascript|142702|我用这个配置更新了rvm，所有的错误都消失了！|142703|rvm+get+stable+--auto-dotfiles|142704|从应用程序的名称可以看出，我刚刚开始使用Ruby+on+Rails，因此上面的建议可能对您有效，也可能不适用。|142705|entityMap^0|F|I|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

On OSX 10.10, I had several issues when running <code>rails new firstapp</code> such as:

<pre><code>ERROR: Error installing json:
ERROR: Failed to build gem native extension.
fatal error: 'ruby/config.h' file not found
</code></pre>

I updated rvm with this configuration and all the errors are gone!:

<pre><code>rvm get stable --auto-dotfiles
</code></pre>

You can tell from the app name that I just started fiddling with Ruby on Rails, so the above advice may or may not work for you.

blocks|key|142735|text|我用了一个简单的解决方案。通过brew安装|type|unstyled|depth|inlineStyleRanges|entityRanges|data|142736|brew安装名称|142737|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I used a simple solution... install through brew

brew install name

blocks|key|4649333|text|这些对我来说都不管用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4649334|最终有效的是使用sudo运行命令-|4649335|gem安装byebug+-v+'9.0.6‘|4649336|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

None of these worked for me.

What finally worked is running the command with a sudo - 

gem install byebug -v '9.0.6'

blocks|key|4649393|text|已经有一段时间了，我也遇到过类似的错误。对于使用bundler的人来说，另一种选择是将标志添加到构建配置中，如下面的示例所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4649394|bundle+config+build.<gemname>+--with-cflags="-Wno-error=implicit-function-declaration"|code-block|syntax|javascript|4649395|紧接着是|4649396|bundle+install|4649397|请注意，您必须将上面的<gemname>替换为在构建本机扩展时抛出错误的实际gem的名称。|4649398|我希望这对将来遇到类似问题的其他人有帮助！|4649399|entityMap^0|O|7|0|0|0|0|B|9|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|T|$]]

It's been a while and I've got similar error. An alternative to folks using <code>bundler</code> is to add the flag to the build configuration like below example:
<pre><code>bundle config build.&lt;gemname&gt; --with-cflags=&quot;-Wno-error=implicit-function-declaration&quot;
</code></pre>
followed by
<pre><code>bundle install
</code></pre>
Please note that you must replace <code>&lt;gemname&gt;</code> above with the name of the actual gem that is throwing the error while building native extensions.
I hope this becomes helpful to others that face similar issues in the future!

I was trying run gem install json and got the following error

<pre><code>Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

 /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb 
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling generator.c
linking shared-object json/ext/generator.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [generator.bundle] Error 1

make failed, exit code 2

Gem files will remain installed in /opt/boxen/repo/.bundle/ruby/2.0.0/gems/json-1.8.0 for inspection.
Results logged to /opt/boxen/repo/.bundle/ruby/2.0.0/extensions/universal-darwin-13/2.0.0/json-1.8.0/gem_make.out
</code></pre>

I'm using: 

Os X: 10.9.2 
Xcode: 5.1 Build version 5B130a 
Command Line Tools (CLT): 5.1.0.0.1.1393561416 
Ruby: ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13] 
Ruby Gem: 2.2.2 
GCC: 4.2.1 Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)

Ruby Gem install Json fails on Mavericks and Xcode 5.1 - unknown argument: '-multiply_definedsuppress'

命令行工具

Xcode

我尝试运行gem install json，得到以下错误Gem::Ext::BuildError: ERROR: Failed to build gem native extension.    /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin...

问Ruby Gem在Mavericks和Xcode 5.1上安装Json失败-未知参数：'-multiply_definedsuppress‘
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