message: In .travis.yml, use ccache for all linux builds.
diff: @@ -120,6 +120,8 @@ jobs:
  MPI=NO
  CODECOV=NO
  MFEM_TEST_TARGET=check
  + cache:
  + ccache: true
  - os: linux
  compiler: gcc
  @@ -128,6 +130,8 @@ jobs:
  MPI=NO
  CODECOV=NO
  MFEM_TEST_TARGET=test
  + cache:
  + ccache: true
  - os: linux
  compiler: gcc
  @@ -151,6 +155,7 @@ jobs:
  MFEM_TEST_TARGET=check
  NPROCS=2
  cache:
  + ccache: true
  directories:
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/lib
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/include
  @@ -182,6 +187,7 @@ jobs:
  MFEM_TEST_TARGET=test
  NPROCS=2
  cache:
  + ccache: true
  directories:
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/lib
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/include
  @@ -214,6 +220,7 @@ jobs:
  - make -j3
  - ctest --output-on-failure
  cache:
  + ccache: true
  directories:
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/lib
  - $TRAVIS_BUILD_DIR/../hypre-2.10.0b/src/hypre/include
  