I think this has to do something with C++11 support? Looks like compiler does not support C++11 on these builds. Maybe we need to take them out of the build matrix?
/Users/travis/build/UG4/ugcore/travis_root/ug4/ugcore/ugbase/common/stopwatch.h:53:10: fatal error: 'chrono' file not found
#include <chrono>
I think this has to do something with C++11 support? Looks like compiler does not support C++11 on these builds. Maybe we need to take them out of the build matrix?