Disable Clang for building against Qt4 in the CI

Qt4 does not support C++11 features when building with Clang, so
the Travis CI fails. This commit should disable this combination
in the build matrix.

diff --git a/.travis.yml b/.travis.yml
index defbb62..476319e 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,4 +26,9 @@ script:
   - cd build
   - if [ "$QT_VERSION" = "qt4" ]; then cmake ..; fi
   - if [ "$QT_VERSION" = "qt5" ]; then source /opt/qt52/bin/qt52-env.sh && cmake  -DUSE_QT5=ON ..; fi
-  - make
\ No newline at end of file
+  - make
+
+matrix:
+  exclude:
+    - compiler: clang
+      env: QT_VERSION=qt4