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Qt 5.14.1 won't compile anything on my CentOS-7

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  • B Offline
    B Offline
    Bob Fachetti
    wrote on last edited by
    #1

    I installed 5.14.1 on Centos-7 a couple days ago. Problem is that nothing, not even the simplest example code will build. Every attempt to compile anything generates the following error:

    #error “Qt requires C++11 support”

    I have tried the obvious fixes, but they have no effect:

    CONFIG += c++11
    QMAKE_CXXFLAGS += -std=c++11

    I have zero issues building with 5.12.4 or 5.12.6, but I have been waiting for a fix that is only in 5.14.1. Here is the relevant information from my CentOS-7 system:

    cat /etc/os-release
    NAME="CentOS Linux"
    VERSION="7 (Core)"
    ID="centos"
    ID_LIKE="rhel fedora"
    VERSION_ID="7"

    uname -r
    3.10.0-693.21.1.el7.x86_64

    gcc --version
    gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
    Copyright (C) 2015 Free Software Foundation, Inc.

    I have also tried it on another CentOS-7 machine with the same result. Is anyone else experiencing an issue with 5.14.1 on CentOS-7?

    B 1 Reply Last reply
    0
  • sierdzioS Offline
    sierdzioS Offline
    sierdzio Moderators
    wrote on last edited by
    #2

    According to GCC themselves, it has pretty much full C++11 support (https://gcc.gnu.org/gcc-4.8/cxx0x_status.html). So I think this is something you should raise on Qt bugtracker.

    I think CentOS allows upgrading GCC (some devel package or something, sorry I don't remember the name), maybe you should try that?

    (Z(:^

    1 Reply Last reply
    1
  • B Offline
    B Offline
    Bob Fachetti
    replied to Bob Fachetti on last edited by
    #3

    @Bob-Fachetti
    5.14.1 requires gcc > 5.0 even though the official documentation says it supports gcc > 4.8.5 . for generic Linux (CentOS-7).

    1 Reply Last reply
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  • Christian EhrlicherC Online
    Christian EhrlicherC Online
    Christian Ehrlicher Lifetime Qt Champion
    wrote on last edited by Christian Ehrlicher
    #4

    @Bob-Fachetti said in Qt 5.14.1 won't compile anything on my CentOS-7:

    Qt requires C++11 support

    Where exactly do you get this message? From qbasicatomic.h ? Can you show us all compiler options?

    See https://codereview.qt-project.org/c/qt/qtbase/+/288702 and https://codereview.qt-project.org/c/qt/qtbase/+/285582

    /edit: ok - gcc < 5 is not supported with Qt5.14 anymore: https://codereview.qt-project.org/c/qt/qtdoc/+/288825

    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
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    1 Reply Last reply
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  • YanChenyuY Offline
    YanChenyuY Offline
    YanChenyu
    wrote on last edited by
    #5

    我尝试后也遇到了此问题。
    centos 7 2003
    qt5.14.2

    Christian EhrlicherC 1 Reply Last reply
    0
  • Christian EhrlicherC Online
    Christian EhrlicherC Online
    Christian Ehrlicher Lifetime Qt Champion
    replied to YanChenyu on last edited by
    #6

    @YanChenyu Please post in english.

    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
    Visit the Qt Academy at https://academy.qt.io/catalog

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