无法安装sqlite3-ruby gem
我安装了xcode 3.0。 我需要安装sqlite3-ruby gem（用于rhosync）。
当我跑：
sudo gem install -l sqlite3-ruby 我收到以下错误：
Building native extensions. This could take a while... ERROR: Error installing sqlite3-ruby: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb checking for #include ... yes checking for sqlite3_libversion_number() in -lsqlite3... yes checking for rb_proc_arity()... no checking for sqlite3_initialize()... no sqlite3-ruby only supports sqlite3 versions 3.6.16+, please upgrade! *** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby --with-sqlite3-dir --without-sqlite3-dir --with-sqlite3-include --without-sqlite3-include=${sqlite3-dir}/include --with-sqlite3-lib --without-sqlite3-lib=${sqlite3-dir}/lib --with-sqlite3lib --without-sqlite3lib Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/sqlite3-ruby-1.3.1 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/sqlite3-ruby-1.3.1/ext/sqlite3/gem_make.out
我检查了许多链接（在Stack Overflow和其他网站上），但似乎没有任何工作。
有些人建议从Mac OS X Disk 2安装Ruby Headers。但我没有那张光盘。 我安装了XCode 3.0 SDK。
我该怎么办？
我从http://macports.org安装了MacPorts然后运行
sudo port install sqlite3
之后，sqlite3-ruby安装成功。