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Hi I am unsuccessfully trying to install MySQL Gem on Ubuntu 10.04.

I have tried the following commands:

sudo gem install mysql
sudo gem install mysql -- --with-mysql-config=/usr/bin/mysql_config

I get the following message for each:

Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
checking for mysql_ssl_set()... no
checking for rb_str_set_len()... no
checking for rb_thread_start_timer()... no
checking for mysql.h... no
checking for mysql/mysql.h... 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/bin/ruby1.8
    --with-mysql-config
    --without-mysql-config


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

I've read on a lot of forums that installing MySQL client libraries (libmysqlclient-dev) helps fix the above issue, but it does for me.

apt-get install libmysqlclient15-dev

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting libmysqlclient-dev instead of libmysqlclient15-dev
libmysqlclient-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Any help on what else may be the issue would greatly be appreciated.

Thanks, Sharmil

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3 Answers 3

Does

sudo apt-get install libmysql-ruby

fetch the required gem?

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+1 its better to use a ruby library from the repository if available. Use gems when the library is not packaged in the repository or if you need a specific version only available as a gem. –  dv3500ea Dec 21 '10 at 14:39

You just need to install libmysqlclient-dev

sudo apt-get install libmysqlclient-dev
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Have you checked this: https://help.ubuntu.com/community/RubyOnRails

This may help you.

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