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  1. Qt
  2. QTBUG-64820

Qt module builds fail with older GCC versions

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.9.4
    • 5.9.3, 5.10.0 RC
    • Packaging & Installer
    • None

    Description

      The Qt binaries installed from OnlineSDK fail to build Qt modules with GCC version that is less than 6.

      The GCC version used to build Qt is stored in mkspec/qconfig.pri, and currently with 5.10.0 it's 6.3.1

      QT_GCC_MAJOR_VERSION = 6
QT_GCC_MINOR_VERSION = 3
QT_GCC_PATCH_VERSION = 1

      When that Qt is used to build any Qt module with GCC less than 6, it fails because qmake still thinks it using GCC 6 and will include compiler options that do not work with GCC5.

      g++ -c -include .pch/Qt5Simulator -pipe -O2 -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -D_REENTRANT -fPIC -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_SIMULATOR_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DGIT_HASH=\"e656f345b3dbca1234b22aa6b5b5dbf7099d1b6e-dirty\" -DGIT_VERSION=\"1.0.8\" -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -I../../include -I../../include/QtSimulator -I../../include/QtSimulator/5.8.0 -I../../include/QtSimulator/5.8.0/QtSimulator -I/home/sapiippo/Qt/5.10.0/gcc_64/include -I/home/sapiippo/Qt/5.10.0/gcc_64/include/QtNetwork -I/home/sapiippo/Qt/5.10.0/gcc_64/include/QtCore -I.moc -I/home/sapiippo/Qt/5.10.0/gcc_64/mkspecs/linux-g++ -o .obj/qsimulatorguidata.o qsimulatorguidata.cpp
g++: error: unrecognized command line option ‘-Wshift-overflow=2’
g++: error: unrecognized command line option ‘-Wduplicated-cond’

gcc version 5.4.0

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          relates to

          Technical task - A technical task. QTQAINFRA-1293 Provision devtoolset 6 on RHEL 7.4

          • 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.
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              releaseteam Qt Release Team
              sapiippo Samuli Piippo
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              Dates

                Created:
                Updated:
                Resolved:

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