From 7aed8f3d48cb08027cfda8a66fdd0c00a1c7b05e Mon Sep 17 00:00:00 2001
From: Philip Hyunsu Cho <chohyu01@cs.washington.edu>
Date: Thu, 28 Mar 2019 00:21:21 -0700
Subject: [PATCH] [CI] Upgrade to GCC 5.3.1, CMake 3.6.0 (#4306)

* Upgrade to GCC 5.3.1, CMake 3.6.0

* <regex> is now okay
---
 tests/ci_build/Dockerfile.gpu | 17 +++++++++--------
 tests/travis/run_test.sh      |  5 -----
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/tests/ci_build/Dockerfile.gpu b/tests/ci_build/Dockerfile.gpu
index fa3b914dd..a97b4043c 100644
--- a/tests/ci_build/Dockerfile.gpu
+++ b/tests/ci_build/Dockerfile.gpu
@@ -7,15 +7,16 @@ ENV DEBIAN_FRONTEND noninteractive
 # Install all basic requirements
 RUN \
     yum -y update && \
-    yum install -y tar unzip wget xz git && \
-    wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo && \
-    yum install -y devtoolset-2-gcc devtoolset-2-binutils devtoolset-2-gcc-c++ && \
+    yum install -y tar unzip wget xz git centos-release-scl yum-utils && \
+    yum-config-manager --enable centos-sclo-rh-testing && \
+    yum -y update && \
+    yum install -y devtoolset-4-gcc devtoolset-4-binutils devtoolset-4-gcc-c++ && \
     # Python
     wget https://repo.continuum.io/miniconda/Miniconda2-4.3.27-Linux-x86_64.sh && \
     bash Miniconda2-4.3.27-Linux-x86_64.sh -b -p /opt/python && \
     # CMake
-    wget -nv -nc https://cmake.org/files/v3.5/cmake-3.5.2-Linux-x86_64.sh --no-check-certificate && \
-    bash cmake-3.5.2-Linux-x86_64.sh --skip-license --prefix=/usr
+    wget -nv -nc https://cmake.org/files/v3.6/cmake-3.6.0-Linux-x86_64.sh --no-check-certificate && \
+    bash cmake-3.6.0-Linux-x86_64.sh --skip-license --prefix=/usr
 
 # NCCL2 (License: https://docs.nvidia.com/deeplearning/sdk/nccl-sla/index.html)
 RUN \
@@ -34,9 +35,9 @@ RUN \
     rm -f nvidia-machine-learning-repo-rhel7-1.0.0-1.x86_64.rpm; fi
 
 ENV PATH=/opt/python/bin:$PATH
-ENV CC=/opt/rh/devtoolset-2/root/usr/bin/gcc
-ENV CXX=/opt/rh/devtoolset-2/root/usr/bin/c++
-ENV CPP=/opt/rh/devtoolset-2/root/usr/bin/cpp
+ENV CC=/opt/rh/devtoolset-4/root/usr/bin/gcc
+ENV CXX=/opt/rh/devtoolset-4/root/usr/bin/c++
+ENV CPP=/opt/rh/devtoolset-4/root/usr/bin/cpp
 
 # Install Python packages
 RUN \
diff --git a/tests/travis/run_test.sh b/tests/travis/run_test.sh
index ebf39d296..962237443 100755
--- a/tests/travis/run_test.sh
+++ b/tests/travis/run_test.sh
@@ -11,11 +11,6 @@ if [ ${TASK} == "lint" ]; then
     (cat logclean.txt|grep warning) && exit -1
     (cat logclean.txt|grep error) && exit -1
 
-    if grep -R '<regex>' src include tests/cpp plugin jvm-packages amalgamation; then
-        echo 'Do not use std::regex, since it is not supported by GCC 4.8.x'
-        exit -1
-    fi
-
     exit 0
 fi