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  1. Qt
  2. QTBUG-64820

Qt module builds fail with older GCC versions

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Done
    • Affects Version/s: 5.9.3, 5.10.0 RC
    • Fix Version/s: 5.9.4
    • Component/s: Packaging & Installer
    • Labels:
      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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              Assignee:
              releaseteam Qt Release Team
              Reporter:
              sapiippo Samuli Piippo
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