Error to gem install mysql

in my console:
[email protected]:~$ sudo gem install mysql
[sudo] password for pt:
Building native extensions. This could take a while…
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.

/usr/local/ruby/bin/ruby extconf.rb
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lm… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lz… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lsocket… no
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lnsl… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lmygcc… no
checking for mysql_query() in -lmysqlclient… no
*** 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=/usr/local/ruby/bin/ruby
–with-mysql-config
–without-mysql-config
–with-mysql-dir
–without-mysql-dir
–with-mysql-include
–without-mysql-include=${mysql-dir}/include
–with-mysql-lib
–without-mysql-lib=${mysql-dir}/lib
–with-mysqlclientlib
–without-mysqlclientlib
–with-mlib
–without-mlib
–with-mysqlclientlib
–without-mysqlclientlib
–with-zlib
–without-zlib
–with-mysqlclientlib
–without-mysqlclientlib
–with-socketlib
–without-socketlib
–with-mysqlclientlib
–without-mysqlclientlib
–with-nsllib
–without-nsllib
–with-mysqlclientlib
–without-mysqlclientlib
–with-mygcclib
–without-mygcclib
–with-mysqlclientlib
–without-mysqlclientlib

Gem files will remain installed in
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/mysql-2.8.1 for inspection.
Results logged to
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

how can i do?
think you in advance.

Pen T. wrote:

how can i do?

Likely you are missing mysql client development libraries. How to fix
this depends on what platform you are on.

e.g. for ubuntu Linux it’s usually
[sudo] apt-get install libmysqlclient-dev

(or libmysqlclient15-dev or libmysqlclient16-dev to force a particular
version)

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