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  1. Qt
  2. QTBUG-56266

qtdeclarative doesn't build with gcc 6 as developer-build

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P1: Critical P1: Critical
    • 5.6.3
    • 5.6.1, 5.7.1
    • Quick: Other
    • None

      The build fails with the warning 'self-comparison always evaluates to true [-Wtautological-compare]' which is raised to error.

      It appears to be caused by a gcc error.

      It is triggered by 

      #define Q_VTABLE_FUNCTION(classname, func) \
    (classname::func == QV4::Managed::func ? 0 : classname::func)

      in qv4managed_p.h

      The following code can reproduce the warning:

      class A {
public:
    static void destroyed() { }
};

class B : public A
{
};

const int tbl[1] = {
    B::destroyed == A::destroyed ? 0 : 1
};

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            allan.jensen Allan Sandfeld Jensen
            allan.jensen Allan Sandfeld Jensen
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              Created:
              Updated:
              Resolved:

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