[Python-checkins] travis: Use -O3 option (GH-5599)

[INADA Naoki]

https://github.com/python/cpython/commit/38e8936eed3d50b39629d4719fd836966c1517f2
commit: 38e8936eed3d50b39629d4719fd836966c1517f2
branch: 3.6
author: INADA Naoki <methane at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2018-04-25T10:27:18+09:00
summary:

travis: Use -O3 option (GH-5599)

We don't use debugger on Travis..
(cherry picked from commit 8ff53564730f7ba503f5ad94418c309c48e8516d)

Co-authored-by: INADA Naoki <methane at users.noreply.github.com>

files:
M .travis.yml

diff --git a/.travis.yml b/.travis.yml
index 7d92c2e2f852..2ced4d0b97f6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,11 @@ cache:
   - pip
   - ccache
 
+env:
+  global:
+    # Use -O3 because we don't use debugger on Travis-CI
+    - CFLAGS="-O3"
+
 branches:
   only:
     - master