The problem that Mysql cannot be installed using Gem in Mac OS

The problem that Mysql cannot be installed using Gem in Mac OS is that when Mysql is installed using Gem in Mac OS, the following error occurs: www.2cto.com Java code Building native extensions. this cocould take a while... ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby. framework/Versions/1.8/usr/bin/ruby extconf. rb checking for mysql_query () in-lmysqlclient... no checking for main () in-lm... yes checking for mysql_query () in-lmysqlclient... no checking for main () in-lz... yes checking for mysql_query () in-lmysqlclient... no checking for main () in-lsocket... no checking for mysql_query () in-lmysqlclient... no checking for main () in-lnsl... no checking for mysql_query () in-lmysqlclient... no checking for main () in-lmygcc... no checking for mysql_query () in-lmysqlclient... no seems to be caused by the lack of some files, so I looked at/System/Library/Frameworks/Ruby. framework/Versions/1.8/usr/bin/ruby extconf. rb found extconf. rb seems to require Mysql PATH, so execute: Java code export PATH = $ PATH:/usr/local/mysql/bin sudo gem install mysql-V' 2. 8.1 'problem solved: www.2cto.com Java code Building native extensions. this cocould take a while... successfully installed mysql-2.8.1 1 gem installed Installing ri documentation for mysql-2.8.1... installing RDoc documentation for mysql-2.8.1...