有很多人有类似的问题，过去我曾经在其他机器上遇到其中一个，并且没有一个解决方案似乎有效 - 我似乎也有其他类似的错误问题：
Building native extensions. This could take a while...
ERROR: Error installing therubyracer:
ERROR: Failed to build gem native extension.
/Users/username/.rvm/rubies/ruby-2.0.0-p353/bin/ruby -r ./siteconf20150412-25981-y7cvt6.rb extconf.rb
checking for main() in -lpthread... yes
checking for main() in -lobjc... yes
creating Makefile
make "DESTDIR=" clean
make "DESTDIR="
compiling accessor.cc
clang: warning: argument unused during compilation: '-rdynamic'
In file included from accessor.cc:1:
In file included from ./rr.h:6:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/vector:265:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/__bit_reference:15:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/algorithm:628:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/memory:604:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/iterator:341:10: fatal error: '__debug' file not found
#include <__debug>
^
1 error generated.
make: *** [accessor.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/ecnalyr/.rvm/gems/ruby-2.0.0-p353@canopy/gems/therubyracer-0.12.2 for inspection.
Results logged to /Users/ecnalyr/.rvm/gems/ruby-2.0.0-p353@canopy/extensions/x86_64-darwin-14/2.0.0/therubyracer-0.12.2/gem_make.out
运行时：
gem install therubyracer -v '0.12.2'
或只是
bundle install
我的gemfile中包含therubyracer。
我正在运行Yosemite 10.10.3，Ruby 2.0.0-p353，我已经卸载了所有内容并尝试了经常遇到这类问题的gem install libv8 -- --with-system-v8解决方案，但是没有找到解决方法。
答案 0 :(得分：11)
创建临时文件＆＃39; __ debug＆＃39;为我解决了这个问题。
在终端中运行此命令：
echo＆＃39; #define _LIBCPP_ASSERT（x，m）（（void）0）＆＃39; | sudo tee -a / Library / Developer / CommandLineTools / usr / include / c ++ / v1 / __ debug＆gt;的/ dev / null的
答案 1 :(得分：7)
我能够通过重新安装Command Line Tools for XCode 6.2（而不是XCode 6.3的那些）来解决这个问题。
Stack Overflow 29529455中有更多讨论。