Use CCache on Travis (#24998)

[av skip] [bsd skip]

.travis.yml

@@ -11,6 +11,7 @@ matrix:
  sources:
  - ubuntu-toolchain-r-test
  packages:
+ - ccache
  - libssl1.0.0
  - bar
  - time
@@ -31,6 +32,7 @@ matrix:
  sources:
  - ubuntu-toolchain-r-test
  packages:
+ - ccache
  - libssl1.0.0
  - bar
  - time
@@ -39,11 +41,7 @@ matrix:
  - os: osx
  env: ARCH="x86_64"
  osx_image: xcode8
-cache:
- directories:
- - $TRAVIS_BUILD_DIR/deps/srccache
- - $TRAVIS_BUILD_DIR/deps/scratch
- - $TRAVIS_BUILD_DIR/deps/usr-staging
+cache: ccache
 branches:
  only:
  - master
@@ -72,22 +70,23 @@ before_install:
  ln -s /usr/bin/g++-5 $HOME/bin/x86_64-linux-gnu-g++;
  gcc --version;
  BAR="bar -i 30";
- BUILDOPTS="-j5 VERBOSE=1 FORCE_ASSERTIONS=1 LLVM_ASSERTIONS=1";
+ BUILDOPTS="-j5 VERBOSE=1 FORCE_ASSERTIONS=1 LLVM_ASSERTIONS=1 USECCACHE=1";
  echo "override ARCH=$ARCH" >> Make.user;
  sudo sh -c "echo 0 > /proc/sys/net/ipv6/conf/lo/disable_ipv6";
  export JULIA_CPU_CORES=4;
  export JULIA_TEST_MAXRSS_MB=1200;
  TESTSTORUN="all";
  elif [ `uname` = "Darwin" ]; then
  brew update;
- brew install -v jq pv;
+ brew install -v jq pv ccache;
+ export PATH="$(brew --prefix ccache)/libexec:$PATH";
  BAR="pv -i 30";
  contrib/travis_fastfail.sh || exit 1;
  brew tap staticfloat/julia;
  brew rm --force $(brew deps --HEAD julia);
  brew install -v --only-dependencies --HEAD julia;
  brew install -v staticfloat/juliadeps/libgfortran llvm39-julia;
- BUILDOPTS="-j3 USECLANG=1 LLVM_CONFIG=$(brew --prefix llvm39-julia)/bin/llvm-config LLVM_SIZE=$(brew --prefix llvm39-julia)/bin/llvm-size";
+ BUILDOPTS="-j3 USECLANG=1 USECCACHE=1 LLVM_CONFIG=$(brew --prefix llvm39-julia)/bin/llvm-config LLVM_SIZE=$(brew --prefix llvm39-julia)/bin/llvm-size";
  BUILDOPTS="$BUILDOPTS VERBOSE=1 USE_BLAS64=0 SUITESPARSE_INC=-I$(brew --prefix suite-sparse-julia)/include FORCE_ASSERTIONS=1";
  BUILDOPTS="$BUILDOPTS LIBBLAS=-lopenblas LIBBLASNAME=libopenblas LIBLAPACK=-lopenblas LIBLAPACKNAME=libopenblas";
  for lib in LLVM SUITESPARSE ARPACK BLAS LAPACK GMP MPFR PCRE LIBUNWIND; do