Errors Installing mysql2 gem via the Bundler

Question

I am trying to install the mysql2 gem via the Bundler, but it keeps dying with the following error:

** executing command
/home/cc_rails/.rvm/rub         


        

Answer 1

Answer was similar to the one Wrikken posted -- here's what I did to fix it for the sake of future readers.

(This is for RHEL 5.5 -- similar but different commands apply for Ubuntu/Debian/etc.)

Doing sudo yum list installed will print out all installed packages on your machine (note: yum on RHEL requires you add a Red Hat Network repository [I use EPEL], and run it via sudo).

I had mysql and mysql-server, which explained why MySQL worked fine for every pre-existing app, but no mysql-devel, which is necessary to fix that mysql.h is missing error and similar other build errors.

Long story short, after a mysqldump -u root -ppassword --all-databases > full-dump.sql for safety, it was fixed with a simple

sudo yum install mysql-devel