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

(cherry picked from commit 8adc73c)
2017-09-05 16:03:29 +02:00 · 2017-09-05 16:03:29 +02:00 · 8704d5439c
parent 7316c6d4a5
commit 8704d5439c
1 changed files with 4 additions and 2 deletions
--- 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

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