Fix compilation on Mac OSX High Sierra (10.13) (#5597)

* Fix compilation on Mac OSX High Sierra

* [CI] Build Mac OSX binary wheel using Travis CI

tests/ci_build/rename_whl.py

@@ -21,8 +21,6 @@ whl_path = sys.argv[1]
 commit_id = sys.argv[2]
 platform_tag = sys.argv[3]
 
-assert platform_tag in ['manylinux1_x86_64', 'manylinux2010_x86_64', 'win_amd64']
-
 dirname, basename = os.path.dirname(whl_path), os.path.basename(whl_path)
 
 with cd(dirname):

tests/travis/run_test.sh

@@ -23,18 +23,42 @@ if [ ${TASK} == "python_test" ]; then
     mkdir build && cd build
     cmake .. -DUSE_OPENMP=ON -DCMAKE_VERBOSE_MAKEFILE=ON
     make -j$(nproc)
-    cd ..
 
     echo "-------------------------------"
     conda activate python3
     conda --version
     python --version
 
+    # Build binary wheel
+    cd ../python-package
+    python setup.py bdist_wheel
+    TAG=macosx_10_13_x86_64.macosx_10_14_x86_64.macosx_10_15_x86_64
+    python ../tests/ci_build/rename_whl.py dist/*.whl ${TRAVIS_COMMIT} ${TAG}
+    python -m pip install ./dist/xgboost-*-py3-none-${TAG}.whl
+
+    # Run unit tests
+    cd ..
     python -m pip install graphviz pytest pytest-cov codecov
     python -m pip install datatable
     python -m pip install numpy scipy pandas matplotlib scikit-learn dask[complete]
     python -m pytest -v --fulltrace -s tests/python --cov=python-package/xgboost || exit -1
     codecov
+
+    # Deploy binary wheel to S3
+    python -m pip install awscli
+    if [ "${TRAVIS_PULL_REQUEST}" != "false" ]
+    then
+        S3_DEST="s3://xgboost-nightly-builds/PR-${TRAVIS_PULL_REQUEST}/"
+    else
+        if [ "${TRAVIS_BRANCH}" == "master" ]
+        then
+            S3_DEST="s3://xgboost-nightly-builds/"
+        elif [ -z "${TRAVIS_TAG}" ]
+        then
+            S3_DEST="s3://xgboost-nightly-builds/${TRAVIS_BRANCH}/"
+        fi
+    fi
+    python -m awscli s3 cp python-package/dist/*.whl "${S3_DEST}" || true
 fi
 
 if [ ${TASK} == "java_test" ]; then