CODEWITHSUNDEEP
ruby-on-railsrubyjsonxcodemacos
zwb
zwb

Reputation: 749

How to install json gem - Failed to build gem native extension(mac 10.10)

OS: Mac OS X 10.10.3 XCode: Latest with command line tools installed (version 6.3) Rails: version 4.2.1 Ruby: version 2.2.1

I was trying to generate the routes for a project I am working on (been doing that on regular basis), when I got an error message, with a recommendation that I do bundle install and bundle exec. I did, and this time around, the process broke off while compiling the JSON Gem (version 1.7.7).

Doing some research on StackOverflow, the recommendation was to update the Xcode's command line tools, and I did, but that did not solve the problem.

I tried installing the JSON version 1.7.7 separately, and it failed, telling me to look for the error log in:

/Users/zwb/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150411-36070-1t083xl.rb extconf.rb
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling generator.c
In file included from generator.c:1:
./../fbuffer/fbuffer.h:175:47: error: too few arguments provided to function-like macro invocation
    VALUE result = rb_str_new(FBUFFER_PAIR(fb));
                                              ^
/Users/zwb/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/intern.h:793:9: note: macro 'rb_str_new' defined here
#define rb_str_new(str, len) __extension__ (    \
        ^
In file included from generator.c:1:
./../fbuffer/fbuffer.h:175:11: warning: incompatible pointer to integer conversion initializing 'VALUE' (aka 'unsigned long') with an expression of type 'VALUE (const char *, long)' [-Wint-conversion]
    VALUE result = rb_str_new(FBUFFER_PAIR(fb));
          ^        ~~~~~~~~~~
1 warning and 1 error generated.
make: *** [generator.o] Error 1

make failed, exit code 2

Upvotes: 36

Views: 37505

Answers (5)

RAJ
RAJ

Reputation: 9747

Sad, however, JSON-1.7.7 (and upto 1.8.1) is incompatible with Ruby-2.2.x. As you are using Ruby-2.2.1, it will not work for you.

There are 2 options for you:

  1. Update your json gem to 1.8.2 version. -- Preferable
  2. Edit ruby-2.2.1/ext/json/fbuffer/fbuffer.h file and replace problematic code with VALUE result = rb_str_new(FBUFFER_PTR(fb), FBUFFER_LEN(fb));. Look here for details

Upvotes: 64

Ian
Ian

Reputation: 11810

I encountered this problem as well, and none of the suggested fixes here solved it.

I was only able to resolve it by manually re-downloading and re-installing the appropriate version of the Xcode command line tools:

https://developer.apple.com/download/more/?name=command%20line%20tools

Upvotes: 0

Subtonix
Subtonix

Reputation: 117

gem install json -v '1.8.2' worked for me.

Upvotes: 0

Jason
Jason

Reputation: 2132

This worked for me, since I downloaded basic Ruby by accident.

1.

Install the Ruby "Development Kit" here: http://rubyinstaller.org/downloads/ Click the self-extracting file, and extract it here:

C:\RubyDevKit

(or somewhere else, but I had problems in other directories)

2.

Open the cmd (terminal): cd C:\RubyDevKit ruby dk.rb init ruby dk.rb install

Source: http://jekyll-windows.juthilo.com/1-ruby-and-devkit/

Upvotes: 0

Robert
Robert

Reputation: 679

If you are using Ruby 2.2.0 or greater, the json gem will not compile properly. You can fix this by issuing bundle update json

Upvotes: 56

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