From b06e5f0e832de341004de7adceead13e86f058ba Mon Sep 17 00:00:00 2001
From: Frank Dellaert <dellaert@gmail.com>
Date: Sun, 2 Jun 2019 16:43:33 -0400
Subject: [PATCH] Install ccache on OSX and add GTSAM_BUILD_WITH_CCACHE flag to
 cmake

---
 .travis.sh  | 1 +
 .travis.yml | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/.travis.sh b/.travis.sh
index bb3b497ed..76d384263 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -23,6 +23,7 @@ function build_and_test ()
   fi
 
   cmake $SOURCE_DIR \
+      -DGTSAM_BUILD_WITH_CCACHE=ON
       -DGTSAM_BUILD_UNSTABLE=$GTSAM_BUILD_UNSTABLE \
       -DGTSAM_BUILD_EXAMPLES_ALWAYS=$GTSAM_BUILD_EXAMPLES_ALWAYS \
       -DGTSAM_BUILD_TESTS=$GTSAM_BUILD_TESTS
diff --git a/.travis.yml b/.travis.yml
index f1ddd240c..402dec48c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,10 @@ addons:
 before_install:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update          ; fi
 
+install:
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install ccache  ; fi
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then export PATH="/usr/local/opt/ccache/libexec:$PATH" ; fi
+
 script:
   - bash .travis.sh