CI/CircleCI: Use ccache for nopch

.circleci/config.yml

@@ -65,13 +65,23 @@ jobs:
             apt-get install -y wget sudo mysql-client
             apt-get install -y libboost-dev libboost-filesystem-dev libboost-iostreams-dev libboost-program-options-dev libboost-regex-dev libboost-system-dev libboost-thread-dev libssl-dev libmysqlclient-dev libreadline-dev libncurses-dev zlib1g-dev libbz2-dev
             apt-get install -y cmake clang git
+            apt-get install -y ccache
       - checkout
+      - restore_cache:
+          keys:
+            - nopch-{{ .Branch }}-{{ .Revision }}
+            - nopch-{{ .Branch }}
+            - nopch
       - run:
           name: Setup
           command: |
+            ccache -s
             git config user.email "circleci@build.bot" && git config user.name "Circl CI"
-            export CC=/usr/bin/clang
-            export CXX=/usr/bin/clang++
+            export CC="ccache clang"
+            export CXX="ccache clang++"
+            export CCACHE_CPP2=yes
+            export USE_CCACHE=1
+            export PATH=/usr/lib/ccache:$PATH
             $CXX --version
             mkdir bin
             cd bin
@@ -82,9 +92,14 @@ jobs:
           command: |
             cd bin
             make -j 4 -k && make install
+            ccache -s
             cd check_install/bin
             ./authserver --version
             ./worldserver --version
+      - save_cache:
+          key: nopch-{{ .Branch }}-{{ .Revision }}
+          paths:
+            - /root/.ccache
 workflows:
   version: 2
   build_all: