only calculate coverage for GCC 4.9

.travis.yml

@@ -36,8 +36,8 @@ script:
   - valgrind --error-exitcode=1 --leak-check=full ./json_unit
 
 after_success:
-  - make clean
-  - touch src/json.hpp
-  - make json_unit CXXFLAGS="-fprofile-arcs -ftest-coverage -std=c++11 -lstdc++" CXX=$COMPILER
-  - ./json_unit "*"
-  - coveralls --exclude test/catch.hpp --exclude test/unit.cpp --include src/json.hpp --gcov-options '\-lp' --gcov 'gcov-4.9'
+  - if [ "$COMPILER" = "g++-4.9" ]; make clean
+  - if [ "$COMPILER" = "g++-4.9" ]; touch src/json.hpp
+  - if [ "$COMPILER" = "g++-4.9" ]; make json_unit CXXFLAGS="-fprofile-arcs -ftest-coverage -std=c++11 -lstdc++" CXX=$COMPILER
+  - if [ "$COMPILER" = "g++-4.9" ]; ./json_unit "*"
+  - if [ "$COMPILER" = "g++-4.9" ]; coveralls --exclude test/catch.hpp --exclude test/unit.cpp --include src/json.hpp --gcov-options '\-lp' --gcov 'gcov-4.9'