最近在mac上用到xgboost庫，安裝時遇到頗多大坑，網上查了很多答案几乎都是win上的問題，沒遇到理想的，自己也就摸著石頭把幾個大坑給填了，總結一下，給後人少走點彎路。

1.錯誤

倘若直接 pip install xgboost時，會出現Command "python setup.py egg_info" failed with error code 1的錯誤提示，
還是乖乖使用Github原始碼安裝吧~

2.正確的開啟方式

• 1.
  

  cd ~
  git clone --recursive https://github.com/dmlc/xgboost

  終端輸出：
  

  Cloning into 'xgboost'
   
  ...
  remote: Counting objects: 19864, done.
  remote: Total 19864 (delta 0), reused 0 (delta 0), pack-reused 19863
  Receiving objects: 100% (19864/19864), 6.69 MiB | 76.00 KiB/s, done.
  Resolving deltas: 100% (11937/11937), done.
  Submodule 'dmlc-core' (https://github.com/dmlc/dmlc-core) registered for path 'dmlc-core'
  Submodule 'rabit'
   
   (https://github.com/dmlc/rabit) registered for path 'rabit'
  Cloning into '/Users/henrylee/xgboost/dmlc-core'...
  Cloning into '/Users/henrylee/xgboost/rabit'...
  Submodule path 'dmlc-core': checked out 'b5bec5481df86e8e6728d8bd80a61d87ef3b2cd5'
  Submodule path 'rabit': checked out 'a764d45cfb438cc9f15cf47ce586c02ff2c65d0f'
   
  

可看出gitclone下來的時候回自動clone上其引用庫，而直接使用Release包則不會

• 2.
  

  cd xgboost

  注意： 倘若直接使用
  

  cd python-package; sudo python setup.py install

  會出現:
  

  Traceback (most recent call last):
  File "setup.py", line 19, in <module>
  LIB_PATH = [os.path.relpath(libfile, CURRENT_DIR) for libfile in libpath['find_lib_path']()]
  File "xgboost/libpath.py", line 46, in find_lib_path
  'List of candidates:\n' + ('\n'.join(dll_path)))
  __builtin__.XGBoostLibraryNotFound: Cannot find XGBoost Library in the candidate path, did you install compilers and run build.sh in root path?

  的錯誤提示，意思是你還是先跑跑資料夾下面的build.sh吧
  注：
  使用Release包會報錯/dmlc-core下找不到某檔案，這也是不要使用Release包的原因

• 3.
  那我就跑吧

  cd ~/xgboost
  bash build.sh

  這時會出現一大堆C++編譯，若無出現則可能像官網所說使用brew安裝下GCC——brew install gcc --without-multilib

• 4.
  這個時候就真可以名正而順地使用

  cd python-package; sudo python setup.py install

  最後會終端出現：
  

  Finished processing dependencies for xgboost==0.6

  代表安裝成功了。

  
  

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