I am using Fedora 14 and I have MySQL and MySQL server 5.1.42 installed and running. Now I tried to do this as root user:
gem install mysql But I get this error:
Buildingnative extensions.This could take a while...
ERROR:Error installing mysql:
ERROR:Failed to build gem native extension./usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h
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.outWhat's wrong here? In installed ruby 1.8.7. and the latest rubygems 1.8.25.
解决办法：
For those who may be confused by the accepted answer, as I was, you also need to have the ruby headers installed [ruby-devel].
The article that saved my hide is here.
And this is the revised solution (note that I'm on Fedora 13):
yum -y install gcc mysql-devel ruby-devel rubygems gem install -y mysql ----with-mysql-config=/usr/bin/mysql_config