Gem::Ext::BuildError: ERROR: Failed to build gem native extension Bcrypt-Ruby

Question

I am making a rails app and just upgraded to Yosemite, and I think everything broke during that update. Everything was working last night when I checked in all my code to github. I updated my computer last night to Yosemite. Today I ran gem install bcrypt-ruby and everything broke. I have;

1. ran xcodebuild -license
2. updated bundler
3. ran brew install rbenv ruby-build rbenv-gem-rehash to get the latest ruby
4. ran brew install coreutils

That did not work though.

environment: OSX Yosemite 10.10, rbenv 0.4.0, ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-darwin14.0], brew 0.9.5`

The source of the error is from my rails app:

gemfile

gem 'rails', '4.1.5'
gem 'pg' 
gem 'uglifier', '>= 1.3.0'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 2.0'
gem 'sdoc', '~> 0.4.0',          group: :doc
gem 'spring',        group: :development
gem 'bcrypt-ruby'

group :test, :development do
  gem 'rspec-rails', "~> 2.14"
end
group :test do
  gem 'capybara', "2.1.0"
  gem 'factory_girl_rails', '~> 4.2.1'
end

I got the error when I ran bundle install. Here is the full stack trace (all the /users// is from taking out the name ;)

 Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /Users//.rbenv/versions/2.0.0-p247/bin/ruby -r ./siteconf20141027-60319-1lss4fm.rb extconf.rb 
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling bcrypt_ext.c
couldn't understand kern.osversion `14.0.0'
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:51:21: error: string.h: No such file or directory
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:61:21: error: stdint.h: No such file or directory
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:64:23: error: inttypes.h: No such file or directory
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:68:19: error: stdio.h: No such file or directory
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:70,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/defines.h:29:21: error: stdlib.h: No such file or directory
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:194,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/../lib/gcc/i686-apple-darwin11/4.2.1/include/limits.h:10:25: error: limits.h: No such file or directory
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:1567,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/missing.h:23:45: error: math.h: No such file or directory
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:1568,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:36:23: error: sys/types.h: No such file or directory
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:40:22: error: sys/time.h: No such file or directory
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:43,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:1568,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/st.h:140: error: expected declaration specifiers or ‘...’ before ‘uint32_t’
In file included from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/ruby.h:1568,
                 from /Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby.h:33,
                 from bcrypt_ext.c:1:
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:326: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_fdset_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:416: error: expected declaration specifiers or ‘...’ before ‘fd_set’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:416: error: expected declaration specifiers or ‘...’ before ‘fd_set’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:416: error: expected declaration specifiers or ‘...’ before ‘fd_set’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:416: warning: ‘struct timeval’ declared inside parameter list
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:416: warning: its scope is only this definition or declaration, which is probably not what you want
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:417: error: expected declaration specifiers or ‘...’ before ‘rb_fdset_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:417: error: expected declaration specifiers or ‘...’ before ‘rb_fdset_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:417: error: expected declaration specifiers or ‘...’ before ‘rb_fdset_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:417: warning: ‘struct timeval’ declared inside parameter list
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:418: warning: ‘struct timeval’ declared inside parameter list
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:514: error: expected declaration specifiers or ‘...’ before ‘mode_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:593: error: expected declaration specifiers or ‘...’ before ‘pid_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:607: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_fork’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:608: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_fork_err’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:610: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_waitpid’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:611: error: expected ‘)’ before ‘pid’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:612: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_spawn’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:613: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rb_spawn_err’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:615: error: expected ‘)’ before ‘pid’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:728: error: expected declaration specifiers or ‘...’ before ‘uint32_t’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:851: error: expected ‘)’ before ‘long’
/Users//.rbenv/versions/2.0.0-p247/include/ruby-2.0.0/ruby/intern.h:852: error: expected ‘)’ before ‘long’
bcrypt_ext.c: In function ‘bc_salt’:
bcrypt_ext.c:21: warning: incompatible implicit declaration of built-in function ‘strlen’
make: *** [bcrypt_ext.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users//ticket_tracker/vendor/bundle/gems/bcrypt-3.1.9 for inspection.
Results logged to /Users//ticket_tracker/vendor/bundle/extensions/x86_64-darwin-12/2.0.0-static/bcrypt-3.1.9/gem_make.out
An error occurred while installing bcrypt (3.1.9), and Bundler cannot continue.
Make sure that `gem install bcrypt -v '3.1.9'` succeeds before bundling.

If anyone has had some experience updated OSX, Rbenv, Ruby etc and can give me some pointers, that would be much appreciated. I can also post more code/environment set up if needed.

Answer 1

I had the same problem which I solved by re-installing the XCode command line developer tools :

xcode-select --install
bundle install

Answer 2

Only a combination of actions helped me to solve the issue. Here is my sequence

1)

xcode-select --install
bundle install

2)

brew update
brew upgrade rbenv ruby-build

3) Switched from ruby 2.1.4 to 2.1.5

rbenv install 2.1.5   
rbenv global 2.1.5
rbenv shell 2.1.5
rbenv rehash
gem install bundler
bundle

4) (optional) in case you had issue with installing nokogiri

brew install libxml2
bundle config build.nokogiri "--use-system-libraries --with-xml2-include=/usr/local/opt/libxml2/include/libxml2"
bundle