If you're using GCC 7 or Clang 4, Q_REQUIRED_RESULT expands to
[[nodiscard]] that must appear in as specific place on the line.
qcompilerdetection.h:1182:29: error: attribute ignored [-Werror=attributes]
qtestsystem.h:58:12: note: in expansion of macro ‘Q_REQUIRED_RESULT’
static Q_REQUIRED_RESULT bool qWaitFor(Functor predicate, int timeout = 5000)
^~~~~~~~~~~~~~~~~
Change-Id: I0b48fc8e90304e0dacc3fffd14e80ede168d5c6b
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
9fcbef15f6