ERROR: Error installing mysql: ERROR: Failed to build gem native extension - mysql

Question

I am a beginner in ruby.
when I install MySQL in gem,I got a problem which confused me a long time.
I install MySQL from brew, as you know the computer system is OSX 10.10.
I have try all solution that can found in stackoverflow,but can't solve it.
such as:
1. Install xcode-tool
2. GEM install mysql2 -- --with-mysql-dir=/usr/local/Cellar/mysql/5.5.25a
3. List itgem install mysql2 -- --with-opt-dir=/usr/local/Cellar/mysql/5.5.25ae
and so on....
The question is:
When I code the command:gem install mysql
I got the below error:
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/Users/iclick/.rvm/rubies/ruby-2.0.0-p481/bin/ruby extconf.rb
checking for mysql_ssl_set()... *** 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/iclick/.rvm/rubies/ruby-2.0.0-p481/bin/ruby
--with-mysql-config
--without-mysql-config
/Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:519:in `try_link0'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:534:in `try_link'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:720:in `try_func'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:1004:in `block in have_func'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:895:in `block in checking_for'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:340:in `block (2 levels) in postpone'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:310:in `open'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:340:in `block in postpone'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:310:in `open'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:336:in `postpone'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:894:in `checking_for'
from /Users/iclick/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/mkmf.rb:1003:in `have_func'
from extconf.rb:45:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in /Users/iclick/.rvm/gems/ruby-2.0.0-p481#style/gems/mysql-2.9.1 for inspection.
Results logged to /Users/iclick/.rvm/gems/ruby-2.0.0-p481#style/extensions/x86_64-darwin-13/2.0.0-static/mysql-2.9.1/gem_make.out
Forgiving my poor english.^_^.
Hoping your answer.

Answer 1

happy,i have solved the problem.
when i execute the command gem update.i got a error,then,i think the issue is caused by gem.
so,i execute the command gem get stable.and then execute the command brew unlink libyaml && brew link libyaml and mysql is installed successful!!!