Command Line: $ sudo env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-config=/usr/local/bin/mysql_config

gem_make.out

Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
	ERROR: Failed to build gem native extension.

        /Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/bin/ruby extconf.rb --with-mysql-config=/usr/local/bin/mysql_config
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=/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/bin/ruby
	--with-mysql-config


Gem files will remain installed in /Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/gems/1.8/gems/mysql2-0.3.7 for inspection.
Results logged to /Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/gems/1.8/gems/mysql2-0.3.7/ext/mysql2/gem_make.out

mkmf.log

have_func: checking for rb_thread_blocking_region()... -------------------- no

"/usr/bin/gcc-4.2 -o conftest -I/opt/local/include -I. -I/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/1.8/i686-darwin11.0.1 -I. -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -g -O2  -pipe -fno-common   conftest.c  -L. -L/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib -L. -L'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib'      -lruby-static  -L/opt/local/lib -ldl -lobjc  "
conftest.c: In function ‘t’:
conftest.c:3: error: ‘rb_thread_blocking_region’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_blocking_region; return 0; }
/* end */

"/usr/bin/gcc-4.2 -o conftest -I/opt/local/include -I. -I/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/1.8/i686-darwin11.0.1 -I. -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -g -O2  -pipe -fno-common   conftest.c  -L. -L/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib -L. -L'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib'      -lruby-static  -L/opt/local/lib -ldl -lobjc  "
ld: warning: directory not found for option '-L/opt/local/lib'
Undefined symbols for architecture x86_64:
  "_rb_thread_blocking_region", referenced from:
      _t in cc3kthSB.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_thread_blocking_region(); return 0; }
/* end */

--------------------

have_header: checking for mysql.h... -------------------- no

"/usr/bin/gcc-4.2 -E -I/opt/local/include -I. -I/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/1.8/i686-darwin11.0.1 -I. -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -I/usr/local/Cellar/mysql/5.5.14/include  -g -arch i386 -arch x86_64 -g -O2  -pipe -fno-common    conftest.c -o conftest.i"
gcc-4.2: -E, -S, -save-temps and -M options are not allowed with multiple -arch flags
checked program was:
/* begin */
1: #include <mysql.h>
/* end */

--------------------

have_header: checking for mysql/mysql.h... -------------------- no

"/usr/bin/gcc-4.2 -E -I/opt/local/include -I. -I/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/lib/ruby/1.8/i686-darwin11.0.1 -I. -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I'/Users/simeon/.rbenv/versions/ree-1.8.7-2011.03/include'  -I/usr/local/Cellar/mysql/5.5.14/include  -g -arch i386 -arch x86_64 -g -O2  -pipe -fno-common    conftest.c -o conftest.i"
gcc-4.2: -E, -S, -save-temps and -M options are not allowed with multiple -arch flags
checked program was:
/* begin */
1: #include <mysql/mysql.h>
/* end */

--------------------