Mysql – Snow Leopard + Ruby 1.9.1 + MySQL Gem = Huge problems

macosMySQLrubyrubygems

I tried for about 3-4 hours trying to get the mysql gem to install for ruby 1.9.1 on snow leopard. The mysql gem used to work just fine on 1.9.1 before I upgraded to snow leopard. I uninstalled MySQL server and gem from my machine. I then downloaded and installed: mysql-5.1.37-osx10.5-x86_64.dmg. I have been able to assert that this new version I installed is running as a 64bit application.

I uninstalled the mysql gem. When I tried to install the gem with this command:

env ARCHFLAGS="-arch x86_64" gem install mysql --verbose -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

I got this error:

GET 304 Not Modified: http://gems.rubyforge.org/latest_specs.4.8.gz
GET 200 OK: http://gems.github.com/latest_specs.4.8.gz
Installing gem mysql-2.8.1
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/COPYING
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/COPYING.ja
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/History.txt
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/Manifest.txt
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/README.txt
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/Rakefile
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/ext/mysql_api/extconf.rb
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/ext/mysql_api/mysql.c
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/extra/README.html
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/extra/README_ja.html
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/extra/tommy.css
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/lib/mysql.rb
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/tasks/gem.rake
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/tasks/native.rake
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/tasks/vendor_mysql.rake
/Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/test/test_mysql.rb
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
        ERROR: Failed to build gem native extension.

/Users/sean/.rvm/ruby-1.9.1-p243/bin/ruby extconf.rb --with-mysql-config=/usr/local/mysql/bin/mysql_config
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... no
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile

make
gcc -I. -I/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/i386-darwin9.8.0 -I/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/backward -I/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1 -I. -DHAVE_MYSQL_SSL_SET -DHAVE_MYSQL_H  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/mysql/include  -g -Os -arch x86_64 -fno-common   -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT  -DDONT_DECLARE_CXA_PURE_VIRTUAL -fno-common  -O2 -g -Wall -Wno-parentheses  -fno-common -pipe -fno-common  -o mysql.o -c mysql.c
In file included from /Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby.h:32,
                 from mysql.c:5:
/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/ruby.h: In function 'INT2NUM':
/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/ruby.h:464: warning: comparison is always true due to limited range of data type
/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/ruby.h:464: warning: comparison is always true due to limited range of data type
/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/ruby.h: In function 'UINT2NUM':
/Users/sean/.rvm/ruby-1.9.1-p243/include/ruby-1.9.1/ruby/ruby.h:472: warning: comparison is always true due to limited range of data type
mysql.c: In function 'escape_string':
mysql.c:290: error: lvalue required as left operand of assignment
mysql.c:290: error: lvalue required as left operand of assignment
mysql.c: In function 'real_escape_string':
mysql.c:434: error: lvalue required as left operand of assignment
mysql.c:434: error: lvalue required as left operand of assignment
make: *** [mysql.o] Error 1


Gem files will remain installed in /Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1 for inspection.
Results logged to /Users/sean/.gem/ruby/1.9.1/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

I have tried everything I have read from the following links.

  1. http://void-design.net/2009/08/05/ruby-191-mysql-and-a-snow-leopard/
  2. http://www.schmidp.com/2009/06/14/rubyrails-and-mysql-on-snow-leopard-10a380/
  3. Rails, MySQL and Snow Leopard

Any ideas?

Best Answer

Sean, I see that you are running Ruby 1.9.1 under rvm. I'm having the same problem under the same setup (Snow Leopard, rvm, MySQL 64-bit package). All of the alternate gems (mysqlplus, kwatch-mysql-ruby, etc) fail with the same error.

I would suspect the MySQL install, but everything works like a champ under the system default Ruby. So I wonder if rvm isn't the monkey wrench somehow.

EDIT: I figured it out. I installed rvm before upgrading to Snow Leopard, so my Ruby 1.9.1 install needed to be recompiled. For good measure, I reinstalled rvm from scratch.

Here's what I did:

sudo gem uninstall rvm
rm -rf ~/.gem
sudo gem install rvm
rvm-install
rvm install 1.9.1
rvm 1.9.1
env ARCHFLAGS="-arch x86_64" gem install mysql

(NOTE: You cannot use sudo when installing gems under rvm, because rvm works by modifying $PATH.)

(NOTE: I added /usr/local/mysql/bin to my $PATH so I didn't have to specify any of those awful command-line args when installing the mysql gem.)

The mysql gem installed without a hitch.

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