無法在Mac Os下通過Gem安裝Mysql的問題

無法在Mac Os下通過Gem安裝Mysql的問題   在Mac Os下通過Gem安裝Mysql時，老是報錯：   www.2cto.com   Java代碼   Building native extensions.  This could 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      貌似是缺少了某些文件導致的，於是看了看/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb發現extconf.rb好像需要Mysql的PATH，於是執行：   Java代碼   export PATH=$PATH:/usr/local/mysql/bin   sudo gem install mysql -v '2.8.1'     問題解決：  www.2cto.com     Java代碼   Building native extensions.  This could 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...