[mythtv-users] Broken Compile - Arch Linux (Ambiguous operator overload)

[Stuart Auchterlonie]

On 24/02/17 04:27, Martin Gallant wrote:
> Hello,
> 
> I am trying to compile the 0.28.1 release on Arch Linux.
> 
> Can anyone point me in the right direction with these errors before I go
> into a deep dive?
> Looks to me like an issue with bleeding edge build tools, but that's
> just a guess.
> 
> Does this look familiar to anyone?
> 
> loggingserver.cpp: In member function 'virtual void DBLoggerThread::run()':
> loggingserver.cpp:725:36: error: ambiguous overload for 'operator!='
> (operand types are 'QCharRef' and 'char')
>              if (item->message()[0] != '\0')
>                  ~~~~~~~~~~~~~~~~~~~^~~~~~~
> In file included from /usr/include/qt/QtCore/qobject.h:47:0,
>                  from /usr/include/qt/QtCore/qiodevice.h:45,
>                  from /usr/include/qt/QtCore/qdatastream.h:44,
>                  from /usr/include/qt/QtGui/qregion.h:49,
>                  from /usr/include/qt/QtGui/qevent.h:45,
>                  from /usr/include/qt/QtGui/QList:1,
>                  from loggingserver.cpp:5:
> /usr/include/qt/QtCore/qstring.h:1639:13: note: candidate: bool
> operator!=(QChar, const QStringRef&)
>  inline bool operator!=(QChar lhs, const QStringRef &rhs) Q_DECL_NOTHROW
> { return !(lhs == rhs); }
>              ^~~~~~~~
> /usr/include/qt/QtCore/qstring.h:1620:13: note: candidate: bool
> operator!=(QChar, const QString&)
>  inline bool operator!=(QChar lhs, const QString &rhs) Q_DECL_NOTHROW {
> return !(lhs == rhs); }
>              ^~~~~~~~
> In file included from /usr/include/qt/QtCore/qstring.h:48:0,
>                  from /usr/include/qt/QtCore/qobject.h:47,
>                  from /usr/include/qt/QtCore/qiodevice.h:45,
>                  from /usr/include/qt/QtCore/qdatastream.h:44,
>                  from /usr/include/qt/QtGui/qregion.h:49,
>                  from /usr/include/qt/QtGui/qevent.h:45,
>                  from /usr/include/qt/QtGui/QList:1,
>                  from loggingserver.cpp:5:
> /usr/include/qt/QtCore/qchar.h:576:30: note: candidate: constexpr bool
> operator!=(QChar, QChar)
>  Q_DECL_CONSTEXPR inline bool operator!=(QChar c1, QChar c2)
> Q_DECL_NOTHROW { return !operator==(c1, c2); }
>                               ^~~~~~~~
> 

What version of Qt are you trying to build against?

You should use 5.7 at this time, we've had a report of issues with
5.8.


Regards
Stuart