build in container-based environment.

tsahara · tsahara · commit f3016752bdc1 · 2015-09-08T13:23:46.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,2 +1,4 @@
+language: c
+sudo: false
 script:
   - "ruby run_test.rb all test"
