Installing MySQL Gem with Rails 3 (Lion 10.7) - mysql

Question

I'm getting this error when I try to install the MySQL gem with Rails 3 on OSX 10.7 Lion.
My Ruby version is ruby 1.9.2p290. I have already installed MySQL and its working perfectly.
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/Users/garethbarker/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb --with-mysql-dir=/usr/bin --with-mysql-lib=/usr/lib64/mysql
checking for mysql_ssl_set()... no
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
llvm-gcc-4.2: -E, -S, -save-temps and -M options are not allowed with multiple -arch flags
*** 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
--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=/Users/garethbarker/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
--with-mysql-config
--without-mysql-config
Gem files will remain installed in /Users/garethbarker/.rvm/gems/ruby-1.9.2-p290/gems/mysql-2.8.1 for inspection.
Results logged to /Users/garethbarker/.rvm/gems/ruby-1.9.2-p290/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

Answer 1

I recall having a similar problem on my Lion OS. Try this out. I found it lying around in my ~/.bash_profile. Add to your ~/.bash_profile:
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH
or
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib