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  1. Qt
  2. QTBUG-96658

compiler error in qdatetime.cpp

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3: Somewhat important
    • Resolution: Out of scope
    • Affects Version/s: 6.2.0 RC
    • Fix Version/s: None
    • Component/s: Core: Date/Time
    • Labels:
      None
    • Platform/s:
      Linux/X11

      Description

      When trying to build Qt I'm running into the compiler errors below in qdatetime.cpp. My compiler is:

      gcc (SUSE Linux) 10.2.1 20200825 [revision c0746a1beb1ba073c7981eb09f55b3d993b32e5c]

      As I'm running into other errors with this compiler version it looks like it has never been tested so far. I had the impression, that Qt 6.2 is supposed to work with all >= gcc 9 vesions ?

      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:4015:76: error: no matching function for call to ‘add_overflow(qint64&, long int, qint64*)’
               if (!add_overflow(msecs, d->m_offsetFromUtc * MSECS_PER_SEC, &msecs))
                                                                                  ^
      In file included from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/qnumeric_p.h:1:0,
                       from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:58:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:234:35: note: candidate: template<class T> bool {anonymous}::add_overflow(T, T, T*)
       template <typename T> inline bool add_overflow(T v1, T v2, T *r) { return qAddOverflow(v1, v2, r); }
                                         ^~~~~~~~~~~~
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:234:35: note:   template argument deduction/substitution failed:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:4015:76: note:   deduced conflicting types for parameter ‘T’ (‘long long int’ and ‘long int’)
               if (!add_overflow(msecs, d->m_offsetFromUtc * MSECS_PER_SEC, &msecs))
                                                                                  ^
      In file included from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/qnumeric_p.h:1:0,
                       from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:58:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:238:34: note: candidate: template<class T, T V2> bool {anonymous}::add_overflow(T, std::integral_constant<T, V2>, T*)
       template <typename T, T V2> bool add_overflow(T v1, std::integral_constant<T, V2>, T *r)
                                        ^~~~~~~~~~~~
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:238:34: note:   template argument deduction/substitution failed:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:4015:76: note:   mismatched types ‘std::integral_constant<T, V2>’ and ‘long int’
               if (!add_overflow(msecs, d->m_offsetFromUtc * MSECS_PER_SEC, &msecs))
                                                                                  ^
      In file included from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/qnumeric_p.h:1:0,
                       from /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:58:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:243:37: note: candidate: template<auto V2, class T> bool {anonymous}::add_overflow(T, T*)
       template <auto V2, typename T> bool add_overflow(T v1, T *r)
                                           ^~~~~~~~~~~~
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/include/QtCore/6.2.0/QtCore/private/../../../../../src/corelib/global/qnumeric_p.h:243:37: note:   template argument deduction/substitution failed:
      /disk3/qt/qt-everywhere-src-6.2.0-rc/qtbase/src/corelib/time/qdatetime.cpp:4015:76: note:   mismatched types ‘T*’ and ‘long int’
               if (!add_overflow(msecs, d->m_offsetFromUtc * MSECS_PER_SEC, &msecs))
      

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              Assignee:
              Eddy Edward Welbourne
              Reporter:
              uwe Uwe Rathmann
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                Resolved:

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