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  1. Qt
  2. QTBUG-53373

qtdeclarative doesn't build with GCC 6.1.1 - self-comparison always evaluates to true

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    • 18e77550f149722e0554f24ddfa326e03a9fef10 2bf765c5d9b568398a30c43d9b54cfd99ac0b828

    Description

      After upgrading to this compiler, a regular configure -developer-build / make (shadow build) does not try to build qtdeclarative - I have to do it manually. Then there is this error:

      g++ -c -O2 -pipe -march=corei7 -g -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Werror -Wno-error=cpp -Wno-error=deprecated-declarations -Wno-error=strict-overflow -D_REENTRANT -fPIC -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_PLUGIN -DQT_SQL_LIB -DQT_QML_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I/home/rutledge/dev/qt57/qtdeclarative/src/imports/localstorage -I. -I/home/rutledge/dev/qt57-dbg/qtbase/include -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtSql -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtQml/5.7.0 -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtQml/5.7.0/QtQml -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtCore/5.7.0 -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtCore/5.7.0/QtCore -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtQml -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtNetwork -I/home/rutledge/dev/qt57-dbg/qtbase/include/QtCore -I.moc -I/home/rutledge/dev/qt57/qtbase/mkspecs/linux-g++ -o .obj/plugin.o /home/rutledge/dev/qt57/qtdeclarative/src/imports/localstorage/plugin.cpp
/home/rutledge/dev/qt57/qtdeclarative/src/imports/localstorage/plugin.cpp:152:126: error: self-comparison always evaluates to true [-Werror=tautological-compare]
 DEFINE_OBJECT_VTABLE(QV4::QQmlSqlDatabaseWrapper);

      So I comment that out in localstorage/plugin.cpp:

      //DEFINE_OBJECT_VTABLE(QV4::QQmlSqlDatabaseWrapper);

      Then I can build (and avoid using SQL from QML).

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        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-52057 Undefined behavior in QV4::ExecutionEngine::newArrayObject lead to crashes

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-56266 qtdeclarative doesn't build with gcc 6 as developer-build

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTBUG-53373
          # Subject Branch Project Status CR V
          162828,1 WIP get localstorage compiling again wip/pointerhandler qt/qtdeclarative Status: ABANDONED -2 0
          162937,1 localstorage: disable -Wtautological-compare on gcc 5.7 qt/qtdeclarative Status: ABANDONED 0 0
          164108,5 localstorage: disable warning about tautological comparison 5.7 qt/qtdeclarative Status: MERGED +2 0
          164358,4 WIP localstorage: disable warning about tautological comparison wip/pointerhandler qt/qtdeclarative Status: ABANDONED -2 0
          164726,29 WIP blanket disable warning about tautological comparison wip/pointerhandler qt/qtdeclarative Status: ABANDONED -2 0
          164866,2 WIP blanket disable tautological comparison warning dev qt/qtdeclarative Status: ABANDONED -2 0
          168214,2 disable tautological comparison warning with gcc 6 5.6 qt/qtdeclarative Status: ABANDONED -1 0
          168229,3 QV4Object: fix GCC 6.1 tautologial compare warning 5.6 qt/qtdeclarative Status: MERGED +2 0
          168282,2 Revert "localstorage: disable warning about tautological comparison" 5.7 qt/qtdeclarative Status: MERGED +2 0
          168415,2 WIP QV4Object: fix GCC 6.1 tautologial compare warning wip/pointerhandler qt/qtdeclarative Status: ABANDONED -2 0

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            People

              mmutz Marc Mutz
              srutledg Shawn Rutledge
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              Dates

                Created:
                Updated:
                Resolved: