Tune travis config for coverage with gcc only.

diff --git a/.travis.yml b/.travis.yml
index 56034ac8d09d368b869d162ff7f12c459d8e106e..d5a288fac9819e7126abd1dbd2b63dbaa41de7e5 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -66,7 +66,8 @@ addons:
 
 before_install:
   - pip install --user cpp-coveralls
-  - pip install --user pyopenssl ndg-httpsclient pyasn1
+    # building cffi only works sith gcc, not with clang
+  - if [ "$CC" = "gcc" ]; then pip install --user pyopenssl ndg-httpsclient pyasn1; fi
     # Lua is not installed on Travis OSX
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install lua; export LUA_PREFIX=/usr/local; fi