use gcc8 for centos7

.gitlab-ci.yml

@@ -376,7 +376,8 @@ centos7_x86_64:
     - GITTAG=`git describe --abbrev=0`
     - echo -e "GITHASH:$GITHASH\nGITTAG:$GITTAG" >> $INSTALL_DIR/VERSION
     - export CHAOS_LIB_HASH=`git log -n 1 --pretty="%h"`;export CHAOS_LAST_TAG=`git describe --abbrev=0`;cd -;
-    - cd html/chaos_dashboard/;./tag.sh $CI_COMMIT_REF_NAME;cd -    
+    - cd html/chaos_dashboard/;./tag.sh $CI_COMMIT_REF_NAME;cd -
+    - export CC=/opt/rh/devtoolset-8/root/usr/bin/gcc;export CXX=/opt/rh/devtoolset-8/root/usr/bin/g++ 
     - if ! cmake -DKAFKA_RDK_ENABLE=ON  -DCMAKE_BUILD_TYPE=Release -DCHAOS_EPICS_SUPPORT=ON -DCHAOS_ARCHITECTURE_TEST=ON -DCHAOS_VERSION_MAJOR="$CI_COMMIT_REF_NAME.$CHAOS_LIB_HASH.$REVNAME ($CHAOS_LAST_TAG)" -DCHAOS_VERSION_MINOR="$CI_JOB_STAGE.$CI_COMMIT_SHA" -DCHAOS_WAN=ON -DCHAOS_DRIVER_LUMINOMETER=ON -DOPENCV=$INSTALL_DIR -DIDS=ueye495 -DBASLER=ON -DCAEN2527=ON -DENABLE_MEMCACHE=ON -DCHAOS_BUILD_ID=${CI_PIPELINE_ID} -DCERN_ROOT=$INSTALL_DIR -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR . |& tee $DISTRIB_PREFIX/bundle.configuration.log;then cat /tmp/cmake.log;fi
     - if ! make  -j 4 install |& tee $INSTALL_DIR/bundle.compilation.log;then tar cfz compilation.tar.gz `find . -name "*.log"` $INSTALL_DIR/bundle.compilation.log;exit 1;fi
     - ./tools/strip_symbols.sh $INSTALL_DIR