I'm trying to install the mysql2 gem on 10.6 server and I get an error message I haven't seen:
EBuilding native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... no
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. please check your installation of mysql and try again.
-----
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
--with-mysql-config
--without-mysql-config
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/ext/mysql2/gem_make.out
I've tried a couple things, specifying where the built-in MySQL is stored sudo gem install mysql2 -- --with-mysql-dir=/var/mysql and also replacing the built-in mysql with the pre-built 64-bit installer from mysql.com
Any ideas?
Figured it out:
sudo env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
I found out you have to have the package mysql-devel installed ... On Centos
do yum -y install mysql-devel and you're good to go.
I have the same problem on OSX 10.5 with RVM with the "system" Ruby interpreter. Using Ruby 1.8.7 through RVM fixed the situation.
I was inspired by: https://gist.github.com/440334#file_gistfile1.txt
来源：https://stackoverflow.com/questions/4424581/error-installing-mysql2-gem-10-6-server