Merge pull request #1211 from R1dO/fix-travis-ccache-clang-warnings

Fix travis ccache clang warnings

.travis.yml

@@ -29,6 +29,7 @@ before_install:
   - if [ $TRAVIS_OS_NAME == linux ]; then mkdir $TRAVIS_BUILD_DIR/dependency-prefix; fi
   - if [ $TRAVIS_OS_NAME == linux ]; then export PKG_CONFIG_PATH=$TRAVIS_BUILD_DIR/dependency-prefix/lib/pkgconfig; fi
   - if [ $TRAVIS_OS_NAME == osx ]; then export PATH="/usr/local/opt/ccache/libexec:$PATH"; fi
+  - if [ $TRAVIS_OS_NAME == linux ] && [ $TRAVIS_COMPILER == clang ]; then export CCACHE_CPP2=yes; fi
 
 install:
   - if [ $TRAVIS_OS_NAME == linux ]; then bash scripts/compile_YAML-CPP.travis; fi

scripts/compile_YAML-CPP.travis

@@ -5,7 +5,7 @@ CMAKE_OPTIONS=(
 	-DCMAKE_BUILD_TYPE="${BUILD_TYPE}"
 	-DYAML_CPP_BUILD_CONTRIB=FALSE
 	-DYAML_CPP_BUILD_TOOLS=FALSE
-	-DYAML_CPP_BUILD_TESTS=NO
+	-DYAML_CPP_BUILD_TESTS=FALSE
 	-DCMAKE_CXX_COMPILER_LAUNCHER=ccache
 )