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我最近卸载了Xcode 4.2并重新安装了Xcode 4.3.1.命令行工具已安装.然后,我使用macports.org中的Lion"dmg"磁盘映像安装了MacPort.因为,我sudo: port: command not found在每次使用端口之后都得到了,我按照这个和这个帖子来创建一个.bash_profile文件(之前没有出现),然后输入以下内容但无济于事.

export PATH=$PATH:/opt/local/bin
export MANPATH=$MANPATH:/opt/local/share/man
export INFOPATH=$INFOPATH:/opt/local/share/info 

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?  ~ git:(master) ? rvm install 1.8.7 --with-openssl-dir=/opt/local
You requested building with '/usr/bin/gcc-4.2' but it is not in your path.
?  ~ git:(master) ? vi .rvmrc 

rvm_archflags="-arch x86_64"

export CC="/usr/bin/gcc-4.2"

export CFLAGS="-O2 -arch x86_64"
export LDFLAGS="-L/opt/local/lib"
export CPPFLAGS="-I/opt/local/include"

重命名.bash_profile为.profile

?  ~ git:(master) ? vi .bash_profile
?  ~ git:(master) ? mv .bash_profile .profile
?  ~ …