[Python-checkins] [3.6] Travis: use ccache (GH-3307) (#3332)

[Christian Heimes]

https://github.com/python/cpython/commit/8704d5439c7de8b471921e0ebcb6a62ebb6fe1a1
commit: 8704d5439c7de8b471921e0ebcb6a62ebb6fe1a1
branch: 3.6
author: Christian Heimes <christian at python.org>
committer: GitHub <noreply at github.com>
date: 2017-09-05T16:03:29+02:00
summary:

[3.6] Travis: use ccache (GH-3307) (#3332)

(cherry picked from commit 8adc73c)

files:
M .travis.yml

diff --git a/.travis.yml b/.travis.yml
index 2515d6416a7..4a507c995e3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,8 +3,10 @@ dist: trusty
 sudo: false
 group: beta
 
-# To cache doc-building dependencies.
-cache: pip
+# To cache doc-building dependencies and C compiler output.
+cache:
+    - pip
+    - ccache
 
 branches:
   only: