我正在尝试构建osx sierra jvm软件包。但是 mvn -DskipTests 安装似乎失败，并且出现以下五个错误
CMake Error at /usr/local/Cellar/cmake/3.7.2/share/cmake/Modules/CMakeDetermineCCompiler.cmake:48 (message):
Could not find compiler set in environment variable CC:
gcc-6.
Call Stack (most recent call first):
CMakeLists.txt:2 (project)
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also "/Users/rjohri/xgboost/build/CMakeFiles/CMakeOutput.log".
building Java wrapper
cd ..
mkdir -p build
cd build
cmake .. -DUSE_S3:BOOL=OFF -DUSE_OPENMP:BOOL=OFF -DPLUGIN_UPDATER_GPU:BOOL=OFF -DUSE_AZURE:BOOL=OFF -DUSE_HDFS:BOOL=OFF -DJVM_BINDINGS:BOOL=ON
Traceback (most recent call last):
File "create_jni.py", line 88, in <module>
run("cmake .. " + " ".join(args) + maybe_generator)
File "create_jni.py", line 51, in run
subprocess.check_call(command, shell=True, **kwargs)
File "/Users/rjohri/anaconda/lib/python2.7/subprocess.py", line 540, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'cmake .. -DUSE_S3:BOOL=OFF -DUSE_OPENMP:BOOL=OFF -DPLUGIN_UPDATER_GPU:BOOL=OFF -DUSE_AZURE:BOOL=OFF -DUSE_HDFS:BOOL=OFF -DJVM_BINDINGS:BOOL=ON' returned non-zero exit status 1
[ERROR] Command execution failed.
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)
at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:404)
at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166)
at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:804)
at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:751)
at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:313)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] xgboost-jvm ........................................ SUCCESS [ 4.922 s]
[INFO] xgboost4j .......................................... FAILURE [ 1.799 s]
[INFO] xgboost4j-spark .................................... SKIPPED
[INFO] xgboost4j-flink .................................... SKIPPED
[INFO] xgboost4j-example .................................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.851 s
[INFO] Finished at: 2017-08-15T10:10:03+01:00
[INFO] Final Memory: 25M/391M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:exec (native) on project xgboost4j: Command execution failed. Process exited with an error: 1 (Exit value: 1) -> [Help 1]
我已经更新了我的 config.mk 以包含 gcc 编译器
# choice of compiler, by default use system preference.
export CC = gcc-6
export CXX = g++-6
但似乎需要我在其他地方改变一些？我不确定还需要做哪些其他更改。我用 ./build.sh 构建了 xgboost 包，它成功运行并安装了 xgboost 的单线程版本。当我尝试安装 jvm 包时，失败了。另外 make -j4 不像文档中建议的那样对我有用，因为它与 fopenmp 有问题并给出以下错误
Makefile:31: MAKE [/Applications/Xcode.app/Contents/Developer/usr/bin/make] - checked OK
g++-6 -std=c++11 -Wall -Wno-unknown-pragmas -Iinclude -Idmlc-core/include -Irabit/include -I/include -O3 -funroll-loops -msse2 -fPIC -fopenmp -o xgboost build/cli_main.o build/learner.o build/logging.o build/c_api/c_api.o build/c_api/c_api_error.o build/common/common.o build/common/hist_util.o build/data/data.o build/data/simple_csr_source.o build/data/simple_dmatrix.o build/data/sparse_page_dmatrix.o build/data/sparse_page_raw_format.o build/data/sparse_page_source.o build/data/sparse_page_writer.o build/gbm/gblinear.o build/gbm/gbm.o build/gbm/gbtree.o build/metric/elementwise_metric.o build/metric/metric.o build/metric/multiclass_metric.o build/metric/rank_metric.o build/objective/multiclass_obj.o build/objective/objective.o build/objective/rank_obj.o build/objective/regression_obj.o build/predictor/cpu_predictor.o build/predictor/predictor.o build/tree/tree_model.o build/tree/tree_updater.o build/tree/updater_colmaker.o build/tree/updater_fast_hist.o build/tree/updater_histmaker.o build/tree/updater_prune.o build/tree/updater_refresh.o build/tree/updater_skmaker.o build/tree/updater_sync.o dmlc-core/libdmlc.a rabit/lib/librabit.a -pthread -lm -fopenmp
make: g++-6: No such file or directory
ar crv lib/libxgboost.a
g++-6 -std=c++11 -Wall -Wno-unknown-pragmas -Iinclude -Idmlc-core/include -Irabit/include -I/include -O3 -funroll-loops -msse2 -fPIC -fopenmp -shared -o lib/libxgboost.dylib build/learner.o build/logging.o build/c_api/c_api.o build/c_api/c_api_error.o build/common/common.o build/common/hist_util.o build/data/data.o build/data/simple_csr_source.o build/data/simple_dmatrix.o build/data/sparse_page_dmatrix.o build/data/sparse_page_raw_format.o build/data/sparse_page_source.o build/data/sparse_page_writer.o build/gbm/gblinear.o build/gbm/gbm.o build/gbm/gbtree.o build/metric/elementwise_metric.o build/metric/metric.o build/metric/multiclass_metric.o build/metric/rank_metric.o build/objective/multiclass_obj.o build/objective/objective.o build/objective/rank_obj.o build/objective/regression_obj.o build/predictor/cpu_predictor.o build/predictor/predictor.o build/tree/tree_model.o build/tree/tree_updater.o build/tree/updater_colmaker.o build/tree/updater_fast_hist.o build/tree/updater_histmaker.o build/tree/updater_prune.o build/tree/updater_refresh.o build/tree/updater_skmaker.o build/tree/updater_sync.o dmlc-core/libdmlc.a rabit/lib/librabit.a -pthread -lm -fopenmp
make: g++-6: No such file or directory
make: *** [xgboost] Error 1
make: *** Waiting for unfinished jobs....
make: *** [lib/libxgboost.dylib] Error 1
ar: no archive members specified
usage: ar -d [-TLsv] archive file ...
ar -m [-TLsv] archive file ...
ar -m [-abiTLsv] position archive file ...
ar -p [-TLsv] archive [file ...]
ar -q [-cTLsv] archive file ...
ar -r [-cuTLsv] archive file ...
ar -r [-abciuTLsv] position archive file ...
ar -t [-TLsv] archive [file ...]
ar -x [-ouTLsv] archive [file ...]
make: *** [lib/libxgboost.a] Error 1
还有其他人遇到过这些错误吗？
任何帮助，不胜感激。谢谢！ 罗什
似乎我需要在配置文件中添加 gcc 编译器的完整路径。它仍然给出了很多无法运行打开的mp版本的警告，所以我不确定是否真的启用了多线程版本。我在这里看到：在Mac OS X 10.11上安装OpenMP，如果已经安装了gcc，则需要重新安装它才能获得OpenMP的好处。将尝试并在此处更新答案。对于我目前的测试目的，这已经足够了。