Question

我试图在XGBoost之后为Python构建these instructions包：

以下是使用支持OpenMP的编译器安装XGBoost的完整解决方案。通过brew install gcc --without-multilib的openmp支持获取gcc-5.x.x. （brew是OS X上apt-get的事实标准。因此不建议单独安装HPC，但它应该可以工作。）：

git clone --recursive https://github.com/dmlc/xgboost
cd xgboost; cp make/config.mk ./config.mk; make -j4

此错误恰好出现在make -j4命令中。

在搜索之前，我已经尝试过这两个解决方案（1和2），但是没有用，除了因为害怕搞乱所有内容而安装另一个gcc的部分。

以下是make配置文件。它没有任何可疑之处。

#-----------------------------------------------------
#  xgboost: the configuration compile script
#
#  If you want to change the configuration, please use the following
#  steps. Assume you are on the root directory of xgboost.
#  First copy the this file so that any local changes will be ignored by git
#
#  $ cp make/config.mk .
#
#  Next modify the according entries, and then compile by
#
#  $ make
#
#  or build in parallel with 8 threads
#
#  $ make -j8
#----------------------------------------------------

# choice of compiler, by default use system preference.
# export CC = gcc
# export CXX = g++
# export MPICXX = mpicxx

# the additional link flags you want to add
ADD_LDFLAGS =

# the additional compile flags you want to add
ADD_CFLAGS =

# Whether enable openmp support, needed for multi-threading.
USE_OPENMP = 1

# whether use HDFS support during compile
USE_HDFS = 0

# whether use AWS S3 support during compile
USE_S3 = 0

# whether use Azure blob support during compile
USE_AZURE = 0

# Rabit library version,
# - librabit.a Normal distributed version.
# - librabit_empty.a Non distributed mock version,
LIB_RABIT = librabit.a

# path to libjvm.so
LIBJVM=$(JAVA_HOME)/jre/lib/amd64/server

# List of additional plugins, checkout plugin folder.
# uncomment the following lines to include these plugins
# you can also add your own plugin like this
#
# XGB_PLUGINS += plugin/example/plugin.mk

Answer 1

您使用Homebrew安装了gcc，但错误来自clang。这应该只是意味着您的默认编译器仍然指向clang而不是新安装的gcc。如果您阅读Makefile中的注释，您将看到以下行：

# choice of compiler, by default use system preference.
# export CC = gcc
# export CXX = g++
# export MPICXX = mpicxx

在您的情况下，您不希望系统一个注意：系统的gcc指向clang：

$ which gcc
/usr/bin/gcc
$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.3.0 (clang-703.0.29)
Target: x86_64-apple-darwin15.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

相反，将这些变量指向/usr/local/bin中的某些内容，例如：

$ export CC=/usr/local/bin/gcc

和其他两个变量类似CXX和MPICXX，例如：

$ export CC=/usr/local/bin/gcc;CXX=/usr/local/bin/g++;MPICXX=/usr/local/bin/mpicxx

Answer 2

先生，也许你应该使用

cd xgboost; cp make / minimum.mk ./config.mk; make -j4

而不是

cd xgboost; cp make / config.mk ./config.mk; make -j4

根据build document

的“Build On OSX”部分

Answer 3

为了解决这个问题，我做了以下事情：我意识到我安装了community two 6，所以我跑了：

gcc

但它本身并不起作用，所以我还必须：

export CC=gcc-6

这为我解决了。我正在运行macOS Sierra的Macbook Pro中。如果需要，您也可以直接在XGBoost的Makefile上进行这些更改。有关此内容的详细信息：https://www.ibm.com/developerworks/community/blogs/jfp/entry/Installing_XGBoost_on_Mac_OSX?lang=en

Answer 4

无法编译本机libxgboost.dylib库，请检查此workaround

clang：error :: errorunsupported option＆＃39; -fopenmp＆＃39;在Mac OSX El Capitan构建XGBoost

4 个答案: