do_mysql.err.log

install do-mysql
Installing do_mysql-0.9.11
Building native extensions.  This could take a while...
ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb merb:gem:install
checking for mysql.h... no
checking for main() in -lmysqlclient... no
checking for mysql_query()... no
checking for mysql_ssl_set()... no
creating Makefile

make
gcc -I. -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin9.0 -I. -I/usr/include  -fno-omit-frame-pointer     -pipe   -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT -fno-common -arch i386 -Os -pipe -fno-common -Wall   -c do_mysql_ext.c
do_mysql_ext.c:6:23: error: my_global.h: No such file or directory
do_mysql_ext.c:7:19: error: mysql.h: No such file or directory
do_mysql_ext.c:8:20: error: errmsg.h: No such file or directory
do_mysql_ext.c:9:26: error: mysqld_error.h: No such file or directory
do_mysql_ext.c:76: error: syntax error before '*' token
do_mysql_ext.c: In function 'infer_rub