Convert compiler warnings to errors for Travis builds (#73)

diff --git a/.travis.yml b/.travis.yml
index 0ebbe34df8db5bd527807ed583c5bb65b8e88525..b871b47f3944eb626a2dba1eba579bae408cbbb9 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,4 +19,4 @@ script:
 env:
     # use JuliaLang caching (https://github.com/staticfloat/cache.julialang.org)
     # so that Travis builds do not depend on anyone's flaky servers but our own
-    - URLCACHE=https://cache.julialang.org/
+    - URLCACHE=https://cache.julialang.org/ CFLAGS="-O2 -Werror"