ruby on rails 3 - bundle install problem: mysql.h is missing

Question

in my mac OSX 10.6 32 bit, I can install mysql2 gem quite easily, but not in mini mac 10.6 64bit server.

I have installed MySQL 5.5.11 in troublesome server, while in my home mac MySQL 5.5.0.m2 Somehow when I run bundle install, in server it tries to install mysql2.0.3.2 while in home mysql2.0.2.6

Please don't tell me to

env ARCHFLAGS="-arch x86_64" sudo gem install mysql2 --version '= 0.2.6' -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

I tried that, doesn't work.

Included /usr/local/mysql/bin in $PATH does not help as well.

Error code:

    Installing mysql2 (0.3.2) with native extensions /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:533:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb 
checking for rb_thread_blocking_region()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing.  please check your installation of mysql and try again.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --without-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/administrator/.rvm/rubies/ruby-1.9.2-p180/bin/ruby
    --with-mysql-config
    --without-mysql-config


Gem files will remain installed in /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/mysql2-0.3.2 for inspection.
Results logged to /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/mysql2-0.3.2/ext/mysql2/gem_make.out
    from /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:511:in `block in build_extensions'
    from /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:486:in `each'
    from /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:486:in `build_extensions'
    from /Users/administrator/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:159:in `install'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/source.rb:96:in `install'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/installer.rb:55:in `block in run'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/spec_set.rb:12:in `block in each'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/spec_set.rb:12:in `each'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/spec_set.rb:12:in `each'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/installer.rb:44:in `run'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/installer.rb:8:in `install'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/cli.rb:225:in `install'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/vendor/thor/task.rb:22:in `run'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/vendor/thor.rb:246:in `dispatch'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/vendor/thor/base.rb:389:in `start'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/bin/bundle:13:in `<top (required)>'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/bin/bundle:19:in `load'
    from /Users/administrator/.rvm/gems/ruby-1.9.2-p180/bin/bundle:19:in `<main>'

Answer 1

I tried all the solutions posted here, but was not lucky. I reinstalled mysql with homebrew a couple of times and still no luck. Then I came across a blog post with a solution.

I edited the mysql_config file in /usr/local/Cellar/mysql/5.6.12/bin and removed the W-compiler options -Wno-null-conversion and -Wno-unused-private-field for cflags and cxxflags.

This solved the problem with gem install mysql2 and bundle install

Reference: http://www.randomactsofsentience.com/2013/05/gem-install-mysql2-missing-mysqlh-on-os.html