脚本宝典收集整理的这篇文章主要介绍了mac os gem安装json出现error failed的解决办法，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。
升级到最新的mac os mavericks。装json出现错误：
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
/usr/local/VAR/rbenv/versions/2.0.0-p247/bin/ruby extconf.rb
creating Makefile
make "DESTDIR="
compiling generator.c
In file included From /usr/local/var/rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
from ../fbuffer/fbuffer.h:5,
from generator.c:1:
/usr/local/var/rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:51:21: error: string.h: No such file or directory
/usr/local/var/rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:61:21: error: stdint.h: No such file or directory
/usr/local/var/rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:64:23: error: inttyPEs.h: No such file or directory
/usr/local/var/rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:68:19: error: stdio.h: No such file or directory
如果这个办法还是不行，mac下需要安装下apple-gcc42
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