From aefdc2cb79b59a18d38e646ce091480d1dcf4acf Mon Sep 17 00:00:00 2001
From: Herbert Thielen <thielen@hs-worms.de>
Date: Sat, 2 Sep 2017 19:07:44 +0200
Subject: [PATCH 1/5] cache ccache

---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 417d2c51..e5177829 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,6 +30,7 @@ os:
   - linux
   - osx
 language: cpp
+cache: ccache
 compiler:
   - gcc
   - clang

From 8118aa85602cc1ae2f9454143e5fa6470241959f Mon Sep 17 00:00:00 2001
From: Herbert Thielen <thielen@hs-worms.de>
Date: Mon, 4 Sep 2017 14:06:14 +0200
Subject: [PATCH 2/5] install ccache on travis osx build slave

---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index e5177829..b7ee780b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ install:
 - if [ "$CXX" = "g++" ]; then export CXX="g++-4.9" CC="gcc-4.9"; fi
 # /usr/bin/clang is 3.4, lets override with modern one.
 - if [ "$CXX" = "clang++" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then export CXX="clang++-3.7" CC="clang-3.7"; fi
+# ccache on OS X needs installation first
+- if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install ccache; export PATH="/usr/local/opt/ccache/libexec:$PATH"; fi
 - echo ${PATH}
 - echo ${CXX}
 - ${CXX} --version

From 28a92c63f3f77f3897c0cd6483ad8d9c96b47899 Mon Sep 17 00:00:00 2001
From: Herbert Thielen <thielen@hs-worms.de>
Date: Tue, 5 Sep 2017 15:23:55 +0200
Subject: [PATCH 3/5] call clang via ccache on Linux

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index b7ee780b..c63909d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ install:
 # /usr/bin/gcc is 4.6 always, but gcc-X.Y is available.
 - if [ "$CXX" = "g++" ]; then export CXX="g++-4.9" CC="gcc-4.9"; fi
 # /usr/bin/clang is 3.4, lets override with modern one.
-- if [ "$CXX" = "clang++" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then export CXX="clang++-3.7" CC="clang-3.7"; fi
+- if [ "$CXX" = "clang++" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then export CXX="clang++-3.7" CC="clang-3.7"; ln -sf /usr/bin/ccache /$HOME/bin/$CXX; ln -sf /usr/bin/ccache /$HOME/bin/$CC; fi
 # ccache on OS X needs installation first
 - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install ccache; export PATH="/usr/local/opt/ccache/libexec:$PATH"; fi
 - echo ${PATH}

From 8d94cdedb5b8e7db9b2c5ec64fa2d99e5e0b11d6 Mon Sep 17 00:00:00 2001
From: Herbert Thielen <thielen@hs-worms.de>
Date: Tue, 5 Sep 2017 13:53:31 +0200
Subject: [PATCH 4/5] show ccache statistics in log

---
 .travis.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index c63909d9..31cea0a1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,6 +33,9 @@ os:
   - osx
 language: cpp
 cache: ccache
+before_cache:
+  # print statistics before uploading new cache
+  - ccache --show-stats
 compiler:
   - gcc
   - clang

From 2d1bdd7b090b761490e6e854db443be2e5350e5e Mon Sep 17 00:00:00 2001
From: Herbert Thielen <thielen@hs-worms.de>
Date: Tue, 5 Sep 2017 15:46:34 +0200
Subject: [PATCH 5/5] reset ccache statistics at install

---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 31cea0a1..ad6dc19c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,8 @@ install:
 - if [ "$CXX" = "clang++" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then export CXX="clang++-3.7" CC="clang-3.7"; ln -sf /usr/bin/ccache /$HOME/bin/$CXX; ln -sf /usr/bin/ccache /$HOME/bin/$CC; fi
 # ccache on OS X needs installation first
 - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install ccache; export PATH="/usr/local/opt/ccache/libexec:$PATH"; fi
+# reset ccache statistics
+- ccache --zero-stats
 - echo ${PATH}
 - echo ${CXX}
 - ${CXX} --version