Mac OS gem install JSON error failed solution _ruby topic

Upgrade to the latest Mac OS Mavericks. There was an error loading JSON:

 code as follows:

Gem install json-v ' 1.8.1 '

Building native extensions. This is 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

Solution:

 code as follows:

Xcode-select--install

Need to reinstall command line Developer Tools

If this method still does not work, the MAC needs to install under the APPLE-GCC42

code as follows:

Brew Install Apple-gcc42

Note that the brew 0.9.4 should be a source without apple-gcc42, and you can use the Brew doctor check to see if it is compatible with Mavericks, which needs to be upgraded

 code as follows:

Brew Update