ruby 2.1安装mysql2 gem 报错

[root@CNSZ141384 tmp]# /opt/chef/embedded/bin/gem install mysql2-0.3.17.gem -l

Building native extensions.  This could take a while...

ERROR:  Error installing mysql2-0.3.17.gem:
ERROR: Failed to build gem native extension.

    /opt/chef/embedded/bin/ruby -r ./siteconf20160217-20268-oxedau.rb extconf.rb

checking for ruby/thread.h... yes

checking for rb_thread_call_without_gvl() in ruby/thread.h... yes

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

-----

Using mysql_config at /usr/bin/mysql_config

-----

checking for mysql.h... yes

checking for errmsg.h... yes

checking for mysqld_error.h... yes

-----

Setting libpath to /usr/lib64

-----

creating Makefile

make "DESTDIR=" clean

make "DESTDIR="

compiling result.c

compiling mysql2_ext.c

compiling client.c

compiling infile.c

linking shared-object mysql2/mysql2.so

/usr/bin/ld: cannot find -lmysqlclient

collect2: ld returned 1 exit status

make: *** [mysql2.so] Error 1

make failed, exit code 2

Gem files will remain installed in /opt/chef/embedded/lib/ruby/gems/2.1.0/gems/mysql2-0.3.17 for inspection.
Results logged to /opt/chef/embedded/lib/ruby/gems/2.1.0/extensions/x86_64-linux/2.1.0/mysql2-0.3.17/gem_make.out

解决方法：是因为本机没有安装：MySQL-shared-5.6.21-1.el6.x86_64.rpm