Problem installing mysql gem

For some reason I can’t get mysql gem installed. I have the
libmysqlclient
and mysql-server and mysql-client installed, but it doesn’t work. I am
running ubuntu 8.10. Am I missing a required package I don’t know about?
What am I doing wrong?

Here is the output:

joey@lab:~/Projects/rets$ sudo gem install mysql
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 install mysql
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
*** 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.

When I try to use the --with-mysqlclientlib conf option, I get this
output:

joey@lab:~/Projects/rets$ sudo gem install mysql –
–with-mysqlclientlib
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 install mysql – --with-mysqlclientlib
checking for mysql_query() in -ltrue… no
checking for main() in -lm… yes
checking for mysql_query() in -ltrue… no
checking for main() in -lz… yes
checking for mysql_query() in -ltrue… no
checking for main() in -lsocket… no
checking for mysql_query() in -ltrue… no
checking for main() in -lnsl… yes
checking for mysql_query() in -ltrue… 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

see how it changes from -lmysqlclient to -ltrue?