从零开始设置Mac的编译环境

今天重新安装了mac的系统，现在是brand new的状态。

我的Mac是10.10.5的OS X Yosemite系统。



1. Install XCode

Install Xcode to get Command Line tools, which is essential for scientific programming.

Normally, you get it from App store. But I can't, because it says the version not available for my system(10.10.5 is too old I guess).

So I just have to find the right version online: https://zh.wikipedia.org/zh-hans/Xcode

wiki says I need Xcode 7.1/7.1.1/7.2

I downloaded Xcode 7.2 from: 
https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_7.2/Xcode_7.2.dmg
open the dmg file and you will get the XCode application. Open the app to validate it then it will be installed completely. 

Then, I need to get Command Line Tools by typing this in terminal: 

xcode-select --install

2. Install X11

Choose the latest version on this site: https://www.xquartz.org/

download and open the dmg file. it is easy.

3. Install a app manager like Fink, MacPorts, Homebrew

well I chose Homebrew, it is quite popular lately so..

very easy step after installation of Xcode, simply enter :

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"[/code] 
(probably you need to press return to continue and type your password of your Mac)

and it is done!

==>
Cleaning up /Library/Caches/Homebrew...
==>
Migrating /Library/Caches/Homebrew to /Users/Carol/Library/Caches/Homebrew..
==>
Deleting /Library/Caches/Homebrew...
Already up-to-date.
==> Installation successful!

==> Homebrew has enabled anonymous aggregate user behaviour analytics.
Read the analytics documentation (and how to opt-out) here:
 
https://docs.brew.sh/Analytics.html

==> Next steps:
- Run `brew help` to get started
- Further documentation: 
    https://docs.brew.sh 
enter "man brew" if you want to know how to use HomeBrew

with HomeBrew, I can install many things easily, for example: 

brew install python --with-brewed-openssl


with the command line above I get python-2.7.6