After build project with including qcustomplot getting warning:

In file included from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qvariant.h:49:0,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmimedata.h:45,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qmime.h:45,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qevent.h:52,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/QPaintEvent:1,
                 from ../tion28/qcustomplot.h:33,
                 from ../tion28/qcustomplot.cpp:26:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h: In member function ‘QMap<Key, T>::iterator QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = double; T = QCPData]’:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h:717:54: note: parameter passing for argument of type ‘QMap<double, QCPData>::iterator’ changed in GCC 7.1
 Q_OUTOFLINE_TEMPLATE typename QMap<Key, T>::iterator QMap<Key, T>::erase(iterator it)
                                                      ^~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPGraph::removeDataBefore(double)’:
../tion28/qcustomplot.cpp:14918:8: note: parameter passing for argument of type ‘QMap<double, QCPData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPGraph::removeDataAfter(double)’:
../tion28/qcustomplot.cpp:14930:8: note: parameter passing for argument of type ‘QMap<double, QCPData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPGraph::removeData(double, double)’:
../tion28/qcustomplot.cpp:14946:8: note: parameter passing for argument of type ‘QMap<double, QCPData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
In file included from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qvariant.h:49:0,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmimedata.h:45,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qmime.h:45,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qevent.h:52,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/QPaintEvent:1,
                 from ../tion28/qcustomplot.h:33,
                 from ../tion28/qcustomplot.cpp:26:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h: In member function ‘QMap<Key, T>::iterator QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = double; T = QCPCurveData]’:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h:717:54: note: parameter passing for argument of type ‘QMap<double, QCPCurveData>::iterator’ changed in GCC 7.1
 Q_OUTOFLINE_TEMPLATE typename QMap<Key, T>::iterator QMap<Key, T>::erase(iterator it)
                                                      ^~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPCurve::removeDataBefore(double)’:
../tion28/qcustomplot.cpp:16990:8: note: parameter passing for argument of type ‘QMap<double, QCPCurveData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPCurve::removeDataAfter(double)’:
../tion28/qcustomplot.cpp:17002:8: note: parameter passing for argument of type ‘QMap<double, QCPCurveData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPCurve::removeData(double, double)’:
../tion28/qcustomplot.cpp:17018:8: note: parameter passing for argument of type ‘QMap<double, QCPCurveData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
In file included from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qvariant.h:49:0,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmimedata.h:45,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qmime.h:45,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qevent.h:52,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/QPaintEvent:1,
                 from ../tion28/qcustomplot.h:33,
                 from ../tion28/qcustomplot.cpp:26:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h: In member function ‘QMap<Key, T>::iterator QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = double; T = QCPBarData]’:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h:717:54: note: parameter passing for argument of type ‘QMap<double, QCPBarData>::iterator’ changed in GCC 7.1
 Q_OUTOFLINE_TEMPLATE typename QMap<Key, T>::iterator QMap<Key, T>::erase(iterator it)
                                                      ^~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPBars::removeDataBefore(double)’:
../tion28/qcustomplot.cpp:18694:8: note: parameter passing for argument of type ‘QMap<double, QCPBarData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPBars::removeDataAfter(double)’:
../tion28/qcustomplot.cpp:18706:8: note: parameter passing for argument of type ‘QMap<double, QCPBarData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPBars::removeData(double, double)’:
../tion28/qcustomplot.cpp:18722:8: note: parameter passing for argument of type ‘QMap<double, QCPBarData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
In file included from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qvariant.h:49:0,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmimedata.h:45,
                 from /home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qmime.h:45,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/qevent.h:52,
                 from ../../work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtGui/QPaintEvent:1,
                 from ../tion28/qcustomplot.h:33,
                 from ../tion28/qcustomplot.cpp:26:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h: In member function ‘QMap<Key, T>::iterator QMap<Key, T>::erase(QMap<Key, T>::iterator) [with Key = double; T = QCPFinancialData]’:
/home/alexey/work1/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/QtCore/qmap.h:717:54: note: parameter passing for argument of type ‘QMap<double, QCPFinancialData>::iterator’ changed in GCC 7.1
 Q_OUTOFLINE_TEMPLATE typename QMap<Key, T>::iterator QMap<Key, T>::erase(iterator it)
                                                      ^~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPFinancial::removeDataBefore(double)’:
../tion28/qcustomplot.cpp:20858:8: note: parameter passing for argument of type ‘QMap<double, QCPFinancialData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPFinancial::removeDataAfter(double)’:
../tion28/qcustomplot.cpp:20871:8: note: parameter passing for argument of type ‘QMap<double, QCPFinancialData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);
     ~~~^~~~~~~~~~~~~~~~~~
../tion28/qcustomplot.cpp: In member function ‘void QCPFinancial::removeData(double, double)’:
../tion28/qcustomplot.cpp:20887:8: note: parameter passing for argument of type ‘QMap<double, QCPFinancialData>::iterator’ changed in GCC 7.1
     it = mData->erase(it);

How solve the problem?