gem install mysql2 windows native extention etc problems - mysql

Question

I have perused many sites and nothing that has worked for everyone else seems to be working for me.
C:/Users/Holly/Desktop/Brolie>gem install mysql2 Temporarily enhancing
PATH to include DevKit... Building native extensions. This could take
a while... ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
C:/Ruby200-x64/bin/ruby.exe extconf.rb checking for rb_thread_blocking_region()... yes checking for
rb_wait_for_single_fd()... yes checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
*** 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=C:/Ruby200-x64/bin/ruby
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/ extconf.rb:37:in `<main>': undefined method `[]' for nil:NilClass (NoMethodError )
Gem files will remain installed in
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql 2-0.3.13 for inspection.
Results logged to
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.13/ext/mysq
l2/gem_make.out
My DevKit is the correct download. I've tried adding the connector, that didn't do anything. Doing a step by step installation through a class and so I know I'm doing things in the correct order but nothing is helping this error.

Answer 1

That actually seems like a bug on extconf.rb:37 instead of a missing dependency or some compilation problem.
Assuming that you triple-check that your ruby version is supported by this version of the gem and you are using the lastest version supported for your ruby version, I suggest open an issue on github.