Mac OS へ XGBoost がインストールできません

Question

Mac OS へ XGBoost をインストールしたいのですが、うまくいきません...
###試したこと
まず

brew install gcc@5
pip install xgboost

というコマンドを打ちました。すると、

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/

と言うエラーを吐かれ、その後調べながら

export CC=gcc-5
export CXX=g++-5

pip install --upgrade pip setuptools

xcode-select --install

といったコマンドを試してから再び

pip install xgboost

を実行したのですが、やはり上と同じようなエラーを吐かれてしまいます。

詳しい方がいましたら、解決方法を教えていただきたいです。

######追加補足
エラー文に以下のような文もありました。

 /usr/local/Cellar/gcc@5/5.5.0_2/include/c++/5.5.0/cwchar:44:19: fatal error: wchar.h: No such file or directory
    compilation terminated.
    make: *** [build/c_api/c_api_error.o] Error 1
    make: *** Waiting for unfinished jobs....
    g++-5 -c -DDMLC_LOG_CUSTOMIZE=1 -std=c++11 -Wall -Wno-unknown-pragmas -Iinclude   -Idmlc-core/include -Irabit/include -I/include -O3 -funroll-loops -msse2 -fPIC -DDISABLE_OPENMP src/c_api/c_api.cc -o build/c_api/c_api.o
    In file included from dmlc-core/include/dmlc/logging.h:10:0,
                     from include/xgboost/logging.h:11,
                     from src/logging.cc:7:
    /usr/local/Cellar/gcc@5/5.5.0_2/include/c++/5.5.0/cstdio:42:19: fatal error: stdio.h: No such file or directory
    compilation terminated.
    make: *** [build/logging.o] Error 1
    In file included from include/xgboost/data.h:10:0,
                     from src/c_api/c_api.cc:3:
    dmlc-core/include/dmlc/base.h:194:23: fatal error: sys/types.h: No such file or directory
    compilation terminated.
    make: *** [build/c_api/c_api.o] Error 1
    g++-5 -c -DDMLC_LOG_CUSTOMIZE=1 -std=c++11 -Wall -Wno-unknown-pragmas -Iinclude   -Idmlc-core/include -Irabit/include -I/include -O3 -funroll-loops -msse2 -fPIC -DDISABLE_OPENMP src/learner.cc -o build/learner.o
    In file included from dmlc-core/include/dmlc/io.h:8:0,
                     from src/learner.cc:7:
    /usr/local/Cellar/gcc@5/5.5.0_2/include/c++/5.5.0/cstdio:42:19: fatal error: stdio.h: No such file or directory
    compilation terminated.
    make: *** [build/learner.o] Error 1
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/setup.py", line 42, in <module>
        LIB_PATH = libpath['find_lib_path']()
      File "/private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/xgboost/libpath.py", line 49, in find_lib_path
        'List of candidates:\n' + ('\n'.join(dll_path)))
    XGBoostLibraryNotFound: Cannot find XGBoost Library in the candidate path, did you install compilers and run build.sh in root path?
    List of candidates:
    /private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/xgboost/libxgboost.dylib
    /private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/xgboost/../../lib/libxgboost.dylib
    /private/var/folders/k0/r2yklh0d65g2cy4tk31r67x00000gn/T/pip-install-fq6vnnbh/xgboost/xgboost/./lib/libxgboost.dylib
    /anaconda3/xgboost/libxgboost.dylib

Answer 1

There is some error of your gcc, on MacOS 10.14, Xcode 10.0+. Because the gcc is installed by brew, with some problem.

You can fix it like this:

brew install gcc@6
brew uninstall --force gcc@5
cd /usr/bin
sudo rm -rf cc gcc g++ c++ cc-5 gcc-5 g++-5 c++-5
sudo ln -s `which g++-6` gcc
sudo ln -s `which g++-6` cc
sudo ln -s `which g++-6` g++
sudo ln -s `which g++-6` c++
sudo ln -s `which g++-6` cc-5
sudo ln -s `which g++-6` gcc-5
sudo ln -s `which g++-6` g++-5
sudo ln -s `which g++-6` c++-5

See more at This page

Then you can install xgboost via pip install xgboost. Wish this solution is work on you!