[Minor] Fix CircleCI script

circle.yml

@@ -5,7 +5,7 @@ machine:
 dependencies:
     pre:
       - sudo apt-get update -qq
-      - sudo apt-get install -qq cmake libevent-dev libglib2.0-dev libgmime-2.6-dev libluajit-5.1-dev liblua5.1-0-dev libmagic-dev libpcre3-dev libsqlite3-dev libssl-dev make ragel redis-server
+      - sudo apt-get install -qq cmake libevent-dev libglib2.0-dev libgmime-2.6-dev libluajit-5.1-dev liblua5.1-0-dev libmagic-dev libpcre3-dev libsqlite3-dev libssl-dev make ragel redis-server gcc
       - sudo pip install robotframework
 #  - echo $TRAVIS_OS_NAME
 #  - if [ "$TRAVIS_OS_NAME" == "linux" ]; then sudo apt-get update -qq ; fi
@@ -15,6 +15,6 @@ dependencies:
 
 test:
   override:
-    - cmake . -DCMAKE_INSTALL_PREFIX=./_install -DCMAKE_C_COMPILER=$CC
+    - cmake . -DCMAKE_INSTALL_PREFIX=./_install
     - cmake --build . --target install
     - sudo robot test/functional/cases