Updated to newer gcc for compat build

.github/workflows/deploy.yml

@@ -84,14 +84,16 @@ jobs:
     steps:
       - name: Prepare CentOS 7 tools
         run: |
-          yum install -y epel-release
-          yum install -y git cmake gcc gcc-c++ libstdc++-static make openssl-devel libmicrohttpd-devel libuv-devel glibc-static libuv-static
+          yum install -y centos-release-scl epel-release
+          yum install -y devtoolset-9
+          yum install -y git cmake libstdc++-static openssl-devel libmicrohttpd-devel libuv-devel glibc-static libuv-static
       - name: Checkout code
         run: |
           git clone https://github.com/MoneroOcean/xmrig.git .
           git checkout ${GITHUB_REF:10}
       - name: Build project on CentOS 7
         run: |
+          source /opt/rh/devtoolset-9/enable
           cmake . -DWITH_TLS=OFF -DWITH_HWLOC=OFF
           make -j$(nproc)
           cp src/config.json .