<![CDATA[Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor]]>I'm trying to update to Qt 5.14 and having a lot of trouble with the change made to QColor. Code I had that compiled in 5.13 fails when referencing QColor.h:

For example:
In file included from /opt/Qt5.14.0/5.14.0/gcc_64/include/QtGui/qpalette.h:45:0,
from /opt/Qt5.14.0/5.14.0/gcc_64/include/QtWidgets/qwidget.h:48,
from /opt/Qt5.14.0/5.14.0/gcc_64/include/QtWidgets/qdialog.h:44,
from /opt/Qt5.14.0/5.14.0/gcc_64/include/QtWidgets/QDialog:1,
from ../myproject/myclass.h:27,
from ../myproject/myclass.cpp:23:
/opt/Qt5.14.0/5.14.0/gcc_64/include/QtGui/qcolor.h: In constructor ‘constexpr QColor::QColor(int, int, int, int)’:
/opt/Qt5.14.0/5.14.0/gcc_64/include/QtGui/qcolor.h:79:18: sorry, unimplemented: use of the value of the object being constructed in a constant expression

This happens with many of my source files.

Is this a known issue? I see that in the 5.14 Release Notes/Desktop Platforms, the stated reference configuration is "GCC 5.3.1 via devtoolset-4". Does this mean that since GCC 4.8.5 is the latest available for CentOS 7, I am stuck at Qt 5.13?

]]>https://forum.qt.io/topic/110482/code-that-worked-in-5-13-won-t-compile-in-5-14-linux-centos-7-gcc4-8-5-qcolorRSS for NodeThu, 11 Jun 2026 01:02:54 GMTWed, 08 Jan 2020 23:39:23 GMT60<![CDATA[Reply to Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor on Thu, 09 Jan 2020 20:35:10 GMT]]>Thanks. I'll look in to installing the patch.

]]>https://forum.qt.io/post/571558https://forum.qt.io/post/571558Thu, 09 Jan 2020 20:35:10 GMT<![CDATA[Reply to Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor on Thu, 09 Jan 2020 05:35:34 GMT]]>@Scopes said in Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor:

Thanks. I'll watch that bu

There is already a patch available which you may apply locally.

]]>https://forum.qt.io/post/571370https://forum.qt.io/post/571370Thu, 09 Jan 2020 05:35:34 GMT<![CDATA[Reply to Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor on Thu, 09 Jan 2020 00:30:00 GMT]]>Thanks. I'll watch that bug. I have investigated devtoolset a little, but haven't been able to get it to work with QtCreator yet.

]]>https://forum.qt.io/post/571347https://forum.qt.io/post/571347Thu, 09 Jan 2020 00:30:00 GMT<![CDATA[Reply to Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor on Wed, 08 Jan 2020 23:58:42 GMT]]>@Scopes said in Code that worked in 5.13 won't compile in 5.14, Linux, CentOS 7, gcc4.8.5, QColor:

sorry, unimplemented: use of the value of the object being constructed in a constant expression

Hi
It has been reported and for 4.9
https://bugreports.qt.io/browse/QTBUG-80997

]]>https://forum.qt.io/post/571345https://forum.qt.io/post/571345Wed, 08 Jan 2020 23:58:42 GMT