why I can't use qt to program in linux normally - c++

Question

I am new to QT,so I want to write a "Hello World" to learn QT first.
1.First,I install the QT5 on my computer.(Archlinux).
sudo pacman -S qt5-base qt5
Then,I install qt-creator.
sudo pacman -S qtcreator
And,I use QT creator to create a new project(I select Qt widgets Application).
the IDE generate some code automatically.I don't add any code to the source file.
.pro:
#-------------------------------------------------
#
# Project created by QtCreator 2017-05-21T14:48:56
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = untitled
TEMPLATE = app
# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact
warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated
APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain
version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all
the APIs deprecated before Qt 6.0.0
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
I think it should generate a blank window when I build and run.
However,When I try to build and run.There are so many issues.
The Picture
I don't know why this happen.
Then I try to use the official examples.I follow the official tutorial Building and Running an Example.Howerver,same issues occurs when I try to build and run.
2.Wyzard say that I should use std=c++11 to compile the program.
So,I create a main.cpp file.
main.cpp:
#include <QApplication>
#include <QPushButton>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QPushButton hello("Hello world!");
hello.resize(100, 30);
hello.show();
return app.exec();
}
Then,I use qmake to generate a makefile.
$qmake -project
$qmake
And,I add -std=c++11 to the compile flags.
make
output:
g++ -c -pipe -O2 -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -Wall -W -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -std=c++11 -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -isystem /usr/include/libdrm -I/usr/lib/qt/mkspecs/linux-g++ -I/usr/include/qt/QtWidgets/ -o hello.o hello.cpp
In file included from /usr/include/qt/QtCore/qbasicatomic.h:53:0,
from /usr/include/qt/QtCore/qatomic.h:46,
from /usr/include/qt/QtCore/qglobal.h:1129,
from /usr/include/qt/QtGui/qtguiglobal.h:43,
from /usr/include/qt/QtWidgets/qtwidgetsglobal.h:43,
from /usr/include/qt/QtWidgets/qapplication.h:43,
from /usr/include/qt/QtWidgets/QApplication:1,
from hello.cpp:1:
/usr/include/qt/QtCore/qatomic_cxx11.h:222:18: error: ‘atomic’ in namespace ‘std’ does not name a template type
typedef std::atomic<X> Type;
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:225:23: error: ‘atomic’ in namespace ‘std’ does not name a template type
T load(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:225:29: error: expected ‘,’ or ‘...’ before ‘<’ token
T load(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:231:32: error: ‘atomic’ in namespace ‘std’ does not name a template type
T load(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:231:38: error: expected ‘,’ or ‘...’ before ‘<’ token
T load(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:231:7: error: ‘template<class X> template<class T> static T QAtomicOps<X>::load(int)’ cannot be overloaded
T load(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:225:7: error: with ‘template<class X> template<class T> static T QAtomicOps<X>::load(int)’
T load(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:237:30: error: ‘atomic’ in namespace ‘std’ does not name a template type
T loadAcquire(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:237:36: error: expected ‘,’ or ‘...’ before ‘<’ token
T loadAcquire(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:243:39: error: ‘atomic’ in namespace ‘std’ does not name a template type
T loadAcquire(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:243:45: error: expected ‘,’ or ‘...’ before ‘<’ token
T loadAcquire(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:243:7: error: ‘template<class X> template<class T> static T QAtomicOps<X>::loadAcquire(int)’ cannot be overloaded
T loadAcquire(const volatile std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:237:7: error: with ‘template<class X> template<class T> static T QAtomicOps<X>::loadAcquire(int)’
T loadAcquire(const std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:249:21: error: ‘std::atomic’ has not been declared
void store(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:249:27: error: expected ‘,’ or ‘...’ before ‘<’ token
void store(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:255:28: error: ‘std::atomic’ has not been declared
void storeRelease(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:255:34: error: expected ‘,’ or ‘...’ before ‘<’ token
void storeRelease(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:263:33: error: ‘std::atomic’ has not been declared
static inline bool ref(std::atomic<T> &_q_value)
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:263:39: error: expected ‘,’ or ‘...’ before ‘<’ token
static inline bool ref(std::atomic<T> &_q_value)
^
/usr/include/qt/QtCore/qatomic_cxx11.h:269:35: error: ‘std::atomic’ has not been declared
static inline bool deref(std::atomic<T> &_q_value) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:269:41: error: expected ‘,’ or ‘...’ before ‘<’ token
static inline bool deref(std::atomic<T> &_q_value) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:279:40: error: ‘std::atomic’ has not been declared
static bool testAndSetRelaxed(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:279:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static bool testAndSetRelaxed(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^
In file included from /usr/include/qt/QtCore/qbasicatomic.h:53:0,
from /usr/include/qt/QtCore/qatomic.h:46,
from /usr/include/qt/QtCore/qglobal.h:1129,
from /usr/include/qt/QtGui/qtguiglobal.h:43,
from /usr/include/qt/QtWidgets/qtwidgetsglobal.h:43,
from /usr/include/qt/QtWidgets/qapplication.h:43,
from /usr/include/qt/QtWidgets/QApplication:1,
from hello.cpp:1:
/usr/include/qt/QtCore/qatomic_cxx11.h:288:40: error: ‘std::atomic’ has not been declared
static bool testAndSetAcquire(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:288:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static bool testAndSetAcquire(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:297:40: error: ‘std::atomic’ has not been declared
static bool testAndSetRelease(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:297:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static bool testAndSetRelease(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:306:40: error: ‘std::atomic’ has not been declared
static bool testAndSetOrdered(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:306:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static bool testAndSetOrdered(std::atomic<T> &_q_value, T expectedValue, T newValue, T *currentValue = Q_NULLPTR) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:318:40: error: ‘std::atomic’ has not been declared
static T fetchAndStoreRelaxed(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:318:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static T fetchAndStoreRelaxed(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:324:40: error: ‘std::atomic’ has not been declared
static T fetchAndStoreAcquire(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:324:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static T fetchAndStoreAcquire(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:330:40: error: ‘std::atomic’ has not been declared
static T fetchAndStoreRelease(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:330:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static T fetchAndStoreRelease(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:336:40: error: ‘std::atomic’ has not been declared
static T fetchAndStoreOrdered(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:336:46: error: expected ‘,’ or ‘...’ before ‘<’ token
static T fetchAndStoreOrdered(std::atomic<T> &_q_value, T newValue) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:345:31: error: ‘std::atomic’ has not been declared
T fetchAndAddRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:345:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAddRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:351:31: error: ‘std::atomic’ has not been declared
T fetchAndAddAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:351:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAddAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:357:31: error: ‘std::atomic’ has not been declared
T fetchAndAddRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:357:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAddRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:363:31: error: ‘std::atomic’ has not been declared
T fetchAndAddOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:363:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAddOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:369:31: error: ‘std::atomic’ has not been declared
T fetchAndSubRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:369:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndSubRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:375:31: error: ‘std::atomic’ has not been declared
T fetchAndSubAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:375:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndSubAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:381:31: error: ‘std::atomic’ has not been declared
T fetchAndSubRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:381:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndSubRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:387:31: error: ‘std::atomic’ has not been declared
T fetchAndSubOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:387:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndSubOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:393:31: error: ‘std::atomic’ has not been declared
T fetchAndAndRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:393:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAndRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:399:31: error: ‘std::atomic’ has not been declared
T fetchAndAndAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:399:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAndAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:405:31: error: ‘std::atomic’ has not been declared
T fetchAndAndRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:405:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAndRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:411:31: error: ‘std::atomic’ has not been declared
T fetchAndAndOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:411:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndAndOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:417:30: error: ‘std::atomic’ has not been declared
T fetchAndOrRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:417:36: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndOrRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:423:30: error: ‘std::atomic’ has not been declared
T fetchAndOrAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:423:36: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndOrAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:429:30: error: ‘std::atomic’ has not been declared
T fetchAndOrRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:429:36: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndOrRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:435:30: error: ‘std::atomic’ has not been declared
T fetchAndOrOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:435:36: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndOrOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:441:31: error: ‘std::atomic’ has not been declared
T fetchAndXorRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:441:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndXorRelaxed(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:447:31: error: ‘std::atomic’ has not been declared
T fetchAndXorAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:447:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndXorAcquire(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:453:31: error: ‘std::atomic’ has not been declared
T fetchAndXorRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:453:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndXorRelease(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
/usr/include/qt/QtCore/qatomic_cxx11.h:459:31: error: ‘std::atomic’ has not been declared
T fetchAndXorOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:459:37: error: expected ‘,’ or ‘...’ before ‘<’ token
T fetchAndXorOrdered(std::atomic<T> &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
^
In file included from /usr/include/qt/QtCore/qbasicatomic.h:53:0,
from /usr/include/qt/QtCore/qatomic.h:46,
from /usr/include/qt/QtCore/qglobal.h:1129,
from /usr/include/qt/QtGui/qtguiglobal.h:43,
from /usr/include/qt/QtWidgets/qtwidgetsglobal.h:43,
from /usr/include/qt/QtWidgets/qapplication.h:43,
from /usr/include/qt/QtWidgets/QApplication:1,
from hello.cpp:1:
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static T QAtomicOps<X>::load(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:227:16: error: ‘_q_value’ was not declared in this scope
return _q_value.load(std::memory_order_relaxed);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:227:30: error: ‘memory_order_relaxed’ is not a member of ‘std’
return _q_value.load(std::memory_order_relaxed);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static T QAtomicOps<X>::load(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:233:16: error: ‘_q_value’ was not declared in this scope
return _q_value.load(std::memory_order_relaxed);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:233:30: error: ‘memory_order_relaxed’ is not a member of ‘std’
return _q_value.load(std::memory_order_relaxed);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static T QAtomicOps<X>::loadAcquire(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:239:16: error: ‘_q_value’ was not declared in this scope
return _q_value.load(std::memory_order_acquire);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:239:30: error: ‘memory_order_acquire’ is not a member of ‘std’
return _q_value.load(std::memory_order_acquire);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static T QAtomicOps<X>::loadAcquire(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:245:16: error: ‘_q_value’ was not declared in this scope
return _q_value.load(std::memory_order_acquire);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:245:30: error: ‘memory_order_acquire’ is not a member of ‘std’
return _q_value.load(std::memory_order_acquire);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static void QAtomicOps<X>::store(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:251:9: error: ‘_q_value’ was not declared in this scope
_q_value.store(newValue, std::memory_order_relaxed);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:251:24: error: ‘newValue’ was not declared in this scope
_q_value.store(newValue, std::memory_order_relaxed);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:251:34: error: ‘memory_order_relaxed’ is not a member of ‘std’
_q_value.store(newValue, std::memory_order_relaxed);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static void QAtomicOps<X>::storeRelease(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:257:9: error: ‘_q_value’ was not declared in this scope
_q_value.store(newValue, std::memory_order_release);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:257:24: error: ‘newValue’ was not declared in this scope
_q_value.store(newValue, std::memory_order_release);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:257:34: error: ‘memory_order_release’ is not a member of ‘std’
_q_value.store(newValue, std::memory_order_release);
^~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static bool QAtomicOps<X>::ref(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:265:18: error: ‘_q_value’ was not declared in this scope
return ++_q_value != 0;
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static bool QAtomicOps<X>::deref(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:271:18: error: ‘_q_value’ was not declared in this scope
return --_q_value != 0;
^~~~~~~~
In file included from /usr/include/qt/QtCore/qbasicatomic.h:53:0,
from /usr/include/qt/QtCore/qatomic.h:46,
from /usr/include/qt/QtCore/qglobal.h:1129,
from /usr/include/qt/QtGui/qtguiglobal.h:43,
from /usr/include/qt/QtWidgets/qtwidgetsglobal.h:43,
from /usr/include/qt/QtWidgets/qapplication.h:43,
from /usr/include/qt/QtWidgets/QApplication:1,
from hello.cpp:1:
/usr/include/qt/QtCore/qatomic_cxx11.h: In static member function ‘static bool QAtomicOps<X>::testAndSetRelaxed(int)’:
/usr/include/qt/QtCore/qatomic_cxx11.h:281:20: error: ‘_q_value’ was not declared in this scope
bool tmp = _q_value.compare_exchange_strong(expectedValue, newValue, std::memory_order_relaxed);
^~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:281:53: error: ‘expectedValue’ was not declared in this scope
bool tmp = _q_value.compare_exchange_strong(expectedValue, newValue, std::memory_order_relaxed);
^~~~~~~~~~~~~
/usr/include/qt/QtCore/qatomic_cxx11.h:281:68: error: ‘newValue’ was not declared in this scope
bool tmp = _q_value.compare_exchange_strong(expectedValue, newValue, std::memory_order_relaxed);
^~~~~~~~
.......
English is not my native language; please excuse typing errors.

Answer 1

Your screenshot shows that the errors are in a file called qatomic_cxx11.h, and they relate to features that were added to the language in C++11. It's likely that your compiler is treating the code as C++98, where things like std::atomic don't exist.
You probably need to add -std=c++11 as a compile option, to tell it to compile as C++11. (Or, if your compiler supports it, use std=c++14 to compile as C++14.)