Mac LightGBM安裝坑較多，記錄：
一、安裝環境：
- OS 10.13.6
- virtualenv/python2.7
- xcode 10.1
- cmake 3.13.4
- gcc 7.3
二、安裝實踐
1、brew install lightgbm，此方法不行，image not found錯誤
2、源碼編譯安裝
官網doc：https://lightgbm.readthedocs.io/en/latest/Installation-Guide.html#macos
源碼編譯安裝官網介紹有兩種方法：
- Cmake + Apple Clang
1.Install CMake (3.12 or higher):
brew install cmake
2.Install OpenMP:
brew install libomp
3. Run the following commands:
git clone --recursive https://github.com/Microsoft/LightGBM ; cd LightGBM
mkdir build ; cd build
# For Mojave (10.14)
cmake \
-DOpenMP_C_FLAGS="-Xpreprocessor -fopenmp -I$(brew --prefix libomp)/include" \
-DOpenMP_C_LIB_NAMES="omp" \
-DOpenMP_CXX_FLAGS="-Xpreprocessor -fopenmp -I$(brew --prefix libomp)/include" \
-DOpenMP_CXX_LIB_NAMES="omp" \
-DOpenMP_omp_LIBRARY=$(brew --prefix libomp)/lib/libomp.dylib \
..
# For High Sierra or earlier (<= 10.13)
cmake ..
make -j4
4.Install lightgbm
cd ../python-packages
sudo python setup.py install --precompile
- Cmake + gcc
1.Install CMake (3.2 or higher):
brew install cmake
2.Install gcc:
brew install gcc
3.Run the following commands:
git clone --recursive https://github.com/Microsoft/LightGBM ; cd LightGBM
export CXX=g++-7 CC=gcc-7 # replace "7" with version of gcc installed on your
machine
mkdir build ; cd build
cmake ..
make -j4
4.Install lightgbm
cd ../python-packages
sudo python setup.py install --precompile
cmake環境如果沒設置，cmake命令加上參數：
cmake -DCMAKE_C_COMPILER=/usr/local/Cellar/gcc/7.3.0_1/bin/gcc-7 -DCMAKE_CXX_COMPILER=/usr/local/Cellar/gcc/7.3.0_1/bin/g++-7 ..
實踐版本爲cmake + gcc，經升級xcode、cmake，安裝OpenMP，解決問題。