install ruby to mac

1、在ruby官方上面提示在macbook中安装ruby可以执行这样一句话：% port install rubyy

2、但是要执行这个的前提是你已经安装了macport了，但是可恶的是你要安装macport的话要先安装mac上面的

     xcode才能安装macport

【呵呵，我的mac 是一定要装xcode的，所以不太难。】

3、所以你应该先下载xcode_3.2.4_and_ios_sdk_4.1.dmg然后安装之后，去http://www.macports.org/下载跟你mac系统一样的版本，我的机器mac版本是Snow Leopard 所以我下来了Snow Leopard 相关的版本MacPorts-1.9.2.pkg

4、接下来就可以安装ruby了

5、切换到root权限，然后执行 port install ruby

 sh-3.2# port install ruby
 --->  Computing dependencies for ruby
 --->  Dependencies to be installed: libiconv gperf ncurses ncursesw openssl zlib readline
 --->  Fetching gperf
 --->  Attempting to fetch gperf-3.0.4.tar.gz from ftp://ftp.dti.ad.jp/pub/GNU/gperf
 --->  Verifying checksum(s) for gperf
 --->  Extracting gperf
 --->  Configuring gperf
 --->  Building gperf
 --->  Staging gperf into destroot
 --->  Installing gperf @3.0.4_0
 --->  Activating gperf @3.0.4_0
 --->  Cleaning gperf
 --->  Fetching libiconv
 --->  Attempting to fetch libiconv-1.13.1.tar.gz from ftp://ftp.dti.ad.jp/pub/GNU/libiconv
 --->  Verifying checksum(s) for libiconv
 --->  Extracting libiconv
 --->  Applying patches to libiconv
 --->  Configuring libiconv
 --->  Building libiconv
 --->  Staging libiconv into destroot
 --->  Installing libiconv @1.13.1_0
 --->  Activating libiconv @1.13.1_0
 --->  Cleaning libiconv
 --->  Fetching ncursesw
 --->  Attempting to fetch ncurses-5.7.tar.gz from ftp://ftp.dti.ad.jp/pub/GNU/ncurses
 --->  Verifying checksum(s) for ncursesw
 --->  Extracting ncursesw
 --->  Applying patches to ncursesw
 --->  Configuring ncursesw
 --->  Building ncursesw
 --->  Staging ncursesw into destroot
 --->  Installing ncursesw @5.7_1
 --->  Activating ncursesw @5.7_1
 --->  Cleaning ncursesw
 --->  Fetching ncurses
 --->  Verifying checksum(s) for ncurses
 --->  Extracting ncurses
 --->  Applying patches to ncurses
 --->  Configuring ncurses
 --->  Building ncurses
 --->  Staging ncurses into destroot
 --->  Installing ncurses @5.7_1
 --->  Activating ncurses @5.7_1
 --->  Cleaning ncurses
 --->  Fetching zlib
 --->  Attempting to fetch zlib-1.2.5.tar.bz2 from http://distfiles.macports.org/zlib
 --->  Verifying checksum(s) for zlib
 --->  Extracting zlib
 --->  Applying patches to zlib
 --->  Configuring zlib
 --->  Building zlib
 --->  Staging zlib into destroot
 --->  Installing zlib @1.2.5_0
 --->  Activating zlib @1.2.5_0
 --->  Cleaning zlib
 --->  Fetching openssl
 --->  Attempting to fetch openssl-1.0.0b.tar.gz from http://distfiles.macports.org/openssl
 --->  Verifying checksum(s) for openssl
 --->  Extracting openssl
 --->  Applying patches to openssl
 --->  Configuring openssl
 --->  Building openssl
 --->  Staging openssl into destroot
 --->  Installing openssl @1.0.0b_0
 --->  Activating openssl @1.0.0b_0
 --->  Cleaning openssl
 --->  Fetching readline
 --->  Attempting to fetch readline61-001 from ftp://ftp.dti.ad.jp/pub/GNU/readline/readline-6.1-patches/
 --->  Attempting to fetch readline61-002 from ftp://ftp.dti.ad.jp/pub/GNU/readline/readline-6.1-patches/
 --->  Attempting to fetch readline-6.1.tar.gz from ftp://ftp.dti.ad.jp/pub/GNU/readline
 --->  Verifying checksum(s) for readline
 --->  Extracting readline
 --->  Applying patches to readline
 --->  Configuring readline
 --->  Building readline
 --->  Staging readline into destroot
 --->  Installing readline @6.1.002_0
 --->  Activating readline @6.1.002_0
 --->  Cleaning readline
 --->  Fetching ruby
 --->  Attempting to fetch ruby-1.8.7-p302.tar.bz2 from ftp://ftp.iij.ad.jp/pub/lang/ruby/1.8
 --->  Verifying checksum(s) for ruby
 --->  Extracting ruby
 --->  Applying patches to ruby
 --->  Configuring ruby
 --->  Building ruby
 --->  Staging ruby into destroot
 --->  Installing ruby @1.8.7-p302_0+thread_hooks
 --->  Activating ruby @1.8.7-p302_0+thread_hooks
 --->  Cleaning ruby
 sh-3.2# port installed
 The following ports are currently installed:
   gperf @3.0.4_0 (active)
   libiconv @1.13.1_0 (active)
   ncurses @5.7_1 (active)
   ncursesw @5.7_1 (active)
   openssl @1.0.0b_0 (active)
   readline @6.1.002_0 (active)
   ruby @1.8.7-p302_0+thread_hooks (active)
   zlib @1.2.5_0 (active)
 sh-3.2# ruby -v
 ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-darwin10]