Is it possible to compile only a part of the Qt source code?

jeanmilost · 5 Nov 2020, 20:37

In order to fix an issue I reported some time ago, and which becomes blocking for my projects, I would like to compile a part of the Qt source code. The issue I'm talking of is the following:
https://bugreports.qt.io/browse/QTBUG-82779

So I have a simple example which reproduce the issue I want to fix, I already got the Qt full source code from the repository, and I already searched the part of the code which may cause the issue. I found a suspect, now I want to test it. The concerned code is located in the QtSVG module.

What I want to do is to compile only the QtSVG module, which contains few classes and probably the issue I want to catch. However I tried to open and compile the provided .pro projects (I found 2 in the QtSVG dir), using both Visual Studio 2019 (it's my preferred tool for development) or Qt Creator. Both show me the same error when I open the .pro files:

[1] - Project MESSAGE: perl -w C:\QT\5.13.0\MSVC2017\bin\syncqt.pl -module QtSvg -version 5.12.7 -outdir "X:/xxxxx/qt5/qtsvg" -builddir "X:/xxxxx/qt5/qtsvg" N:/Jeanmilost/Devel/Public Projects/qt5/qtsvg
[2] - Use of uninitialized value $directory in concatenation (.) or string at Y:\QT\5.13.0\MSVC2017\bin\syncqt.pl line 689.
[3] - fileparse(): need a valid pathname at Y:\QT\5.13.0\MSVC2017\bin\syncqt.pl line 692.
[4] - Project ERROR: Failed to run: perl -w Y:\QT\5.13.0\MSVC2017\bin\syncqt.pl -module QtSvg -version 5.12.7 -outdir "X:/xxxxx/qt5/qtsvg" -builddir "X:/xxxxx/qt5/qtsvg" N:/Jeanmilost/Devel/Public Projects/qt5/qtsvg

I also tweaked a while the .pro project to disable the part which requires Perl, and I could create a Visual Studio 2019 .sln project. However I have the following errors and warnings while I compile:

Severity	Code	Description	Project	File	Line	Suppression State
Warning	C4273	'QSvgFont::QSvgFont': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	57	
Error	C1083	Cannot open include file: 'private/qpaintengine_p.h': No such file or directory	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggenerator.cpp	46	
Warning	C4273	'QSvgGlyph::QSvgGlyph': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	50	
Warning	C4273	'QSvgFont::familyName': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	63	
Warning	C4273	'QSvgFont::addGlyph': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	69	
Warning	C4273	'QSvgFont::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	76	
Warning	C4273	'QSvgFont::setFamilyName': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	127	
Warning	C4273	'QSvgFont::setUnitsPerEm': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgfont.cpp	132	
Warning	C4273	'QSvgG::QSvgG': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	53	
Warning	C4273	'QSvgStructureNode::~QSvgStructureNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	59	
Warning	C4273	'QSvgG::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	64	
Warning	C4273	'QSvgG::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	78	
Warning	C4273	'QSvgStructureNode::QSvgStructureNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	83	
Warning	C4273	'QSvgStructureNode::scopeNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	89	
Warning	C4273	'QSvgStructureNode::addChild': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	95	
Warning	C4273	'QSvgDefs::QSvgDefs': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	107	
Warning	C4273	'QSvgDefs::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	112	
Warning	C4273	'QSvgDefs::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	117	
Error	C1083	Cannot open include file: 'private/qobject_p.h': No such file or directory	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgrenderer.cpp	49	
Warning	C4273	'QSvgSwitch::QSvgSwitch': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	274	
Warning	C4273	'QSvgSwitch::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	280	
Warning	C4273	'QSvgSwitch::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	344	
Warning	C4273	'QSvgSwitch::init': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	349	
Warning	C4273	'QSvgStructureNode::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	357	
Warning	C4273	'QSvgNode::QSvgNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	49	
Warning	C4273	'QSvgNode::~QSvgNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	56	
Warning	C4273	'QSvgStructureNode::previousSiblingNode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstructure.cpp	365	
Warning	C4273	'QSvgNode::isDescendantOf': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	61	
Warning	C4273	'QSvgNode::appendStyleProperty': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	72	
Warning	C4273	'QSvgNode::applyStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	126	
Warning	C4273	'QSvgNode::revertStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	131	
Warning	C4273	'QSvgNode::styleProperty': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	136	
Warning	C4273	'QSvgNode::styleProperty': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	198	
Warning	C4273	'QSvgNode::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	207	
Warning	C4273	'QSvgNode::transformedBounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	212	
Warning	C4273	'QSvgNode::document': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	241	
Warning	C4273	'QSvgNode::setRequiredFeatures': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	253	
Warning	C4273	'QSvgNode::requiredFeatures': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	258	
Warning	C4273	'QSvgNode::setRequiredExtensions': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	263	
Warning	C4273	'QSvgNode::requiredExtensions': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	268	
Warning	C4273	'QSvgNode::setRequiredLanguages': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	273	
Warning	C4273	'QSvgNode::requiredLanguages': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	278	
Warning	C4273	'QSvgNode::setRequiredFormats': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	283	
Warning	C4273	'QSvgNode::requiredFormats': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	288	
Warning	C4273	'QSvgNode::setRequiredFonts': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	293	
Warning	C4273	'QSvgNode::requiredFonts': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	298	
Warning	C4273	'QSvgNode::setVisible': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	303	
Warning	C4273	'QSvgNode::transformedBounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	315	
Warning	C4273	'QSvgNode::setNodeId': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	323	
Warning	C4273	'QSvgNode::setXmlClass': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	328	
Warning	C4273	'QSvgNode::setDisplayMode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	333	
Warning	C4273	'QSvgNode::displayMode': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	338	
Error	C1083	Cannot open include file: 'private/qcssparser_p.h': No such file or directory (compiling source file qsvghandler.cpp)	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvghandler_p.h	59	
Warning	C4273	'QSvgNode::strokeWidth': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgnode.cpp	343	
Error	C1083	Cannot open include file: 'private/qobject_p.h': No such file or directory	svg	X:\xxxxx\qt5\qtsvg\src\svg\qgraphicssvgitem.cpp	48	
Warning	C4273	'QSvgAnimation::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	74	
Warning	C4273	'QSvgEllipse::QSvgEllipse': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	87	
Warning	C4273	'QSvgEllipse::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	93	
Warning	C4273	'QSvgEllipse::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	101	
Warning	C4273	'QSvgArc::QSvgArc': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	108	
Warning	C4273	'QSvgArc::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	113	
Warning	C4273	'QSvgImage::QSvgImage': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	126	
Warning	C4273	'QSvgImage::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	136	
Warning	C4273	'QSvgLine::QSvgLine': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	144	
Warning	C4273	'QSvgLine::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	150	
Warning	C4273	'QSvgPath::QSvgPath': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	162	
Warning	C4273	'QSvgPath::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	167	
Warning	C4273	'QSvgPath::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	175	
Warning	C4273	'QSvgPolygon::QSvgPolygon': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	182	
Warning	C4273	'QSvgPolygon::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	187	
Warning	C4273	'QSvgPolygon::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	199	
Warning	C4273	'QSvgPolyline::QSvgPolyline': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	207	
Warning	C4273	'QSvgPolyline::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	213	
Warning	C4273	'QSvgRect::QSvgRect': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	232	
Warning	C4273	'QSvgRect::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	238	
Warning	C4273	'QSvgRect::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	250	
Warning	C4273	'LINEBREAK': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	260	
Error	C2491	'QSvgText::LINEBREAK': definition of dllimport static data member not allowed	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	260	
Warning	C4273	'QSvgText::QSvgText': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	263	
Warning	C4273	'QSvgText::~QSvgText': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	272	
Warning	C4273	'QSvgText::setTextArea': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	280	
Warning	C4273	'QSvgText::draw': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	288	
Warning	C4273	'QSvgText::addText': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	455	
Warning	C4273	'QSvgAnimation::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	496	
Warning	C4273	'QSvgArc::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	501	
Warning	C4273	'QSvgCircle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	506	
Warning	C4273	'QSvgEllipse::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	511	
Warning	C4273	'QSvgImage::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	516	
Warning	C4273	'QSvgLine::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	521	
Warning	C4273	'QSvgPath::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	526	
Warning	C4273	'QSvgPolygon::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	531	
Warning	C4273	'QSvgPolyline::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	536	
Warning	C4273	'QSvgRect::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	541	
Warning	C4273	'QSvgText::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	546	
Warning	C4273	'QSvgPolyline::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	573	
Warning	C4273	'QSvgArc::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	585	
Warning	C4273	'QSvgImage::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	592	
Warning	C4273	'QSvgLine::bounds': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvggraphics.cpp	597	
Warning	C4273	'QSvgExtraStates::QSvgExtraStates': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	57	
Warning	C4273	'QSvgStyleProperty::~QSvgStyleProperty': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	69	
Warning	C4273	'QSvgFillStyleProperty::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	73	
Warning	C4273	'QSvgFillStyleProperty::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	78	
Warning	C4273	'QSvgQualityStyle::QSvgQualityStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	84	
Warning	C4273	'QSvgQualityStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	88	
Warning	C4273	'QSvgQualityStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	92	
Warning	C4273	'QSvgFillStyle::QSvgFillStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	97	
Warning	C4273	'QSvgFillStyle::setFillRule': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	110	
Warning	C4273	'QSvgFillStyle::setFillOpacity': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	116	
Warning	C4273	'QSvgFillStyle::setFillStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	122	
Warning	C4273	'QSvgFillStyle::setBrush': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	128	
Warning	C4273	'QSvgFillStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	135	
Warning	C4273	'QSvgFillStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	153	
Warning	C4273	'QSvgViewportFillStyle::QSvgViewportFillStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	163	
Warning	C4273	'QSvgViewportFillStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	168	
Warning	C4273	'QSvgViewportFillStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	174	
Warning	C4273	'QSvgFontStyle::QSvgFontStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	179	
Warning	C4273	'QSvgFontStyle::QSvgFontStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	191	
Warning	C4273	'QSvgFontStyle::SVGToQtWeight': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	202	
Warning	C4273	'QSvgFontStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	223	
Warning	C4273	'QSvgFontStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	262	
Warning	C4273	'QSvgStrokeStyle::QSvgStrokeStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	270	
Warning	C4273	'QSvgStrokeStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	291	
Warning	C4273	'QSvgStrokeStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	377	
Warning	C4273	'QSvgStrokeStyle::setDashArray': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	385	
Warning	C4273	'QSvgSolidColorStyle::QSvgSolidColorStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	401	
Warning	C4273	'QSvgGradientStyle::QSvgGradientStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	406	
Warning	C4273	'QSvgGradientStyle::brush': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	411	
Warning	C4273	'QSvgGradientStyle::setMatrix': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	432	
Warning	C4273	'QSvgTransformStyle::QSvgTransformStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	437	
Warning	C4273	'QSvgTransformStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	442	
Warning	C4273	'QSvgTransformStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	448	
Warning	C4273	'QSvgQualityStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	453	
Warning	C4273	'QSvgFillStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	458	
Warning	C4273	'QSvgViewportFillStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	463	
Warning	C4273	'QSvgFontStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	468	
Warning	C4273	'QSvgStrokeStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	473	
Warning	C4273	'QSvgSolidColorStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	478	
Warning	C4273	'QSvgGradientStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	483	
Warning	C4273	'QSvgTransformStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	488	
Warning	C4273	'QSvgCompOpStyle::QSvgCompOpStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	494	
Warning	C4273	'QSvgCompOpStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	500	
Warning	C4273	'QSvgCompOpStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	506	
Warning	C4273	'QSvgCompOpStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	511	
Warning	C4273	'QSvgStyle::~QSvgStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	516	
Warning	C4273	'QSvgStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	520	
Warning	C4273	'QSvgStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	584	
Warning	C4273	'QSvgAnimateTransform::QSvgAnimateTransform': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	637	
Warning	C4273	'QSvgAnimateTransform::setArgs': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	652	
Warning	C4273	'QSvgAnimateTransform::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	661	
Warning	C4273	'QSvgAnimateTransform::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	669	
Warning	C4273	'QSvgAnimateTransform::resolveMatrix': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	675	
Warning	C4273	'QSvgAnimateTransform::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	800	
Warning	C4273	'QSvgAnimateTransform::setFreeze': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	805	
Warning	C4273	'QSvgAnimateTransform::setRepeatCount': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	810	
Warning	C4273	'QSvgAnimateColor::QSvgAnimateColor': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	815	
Warning	C4273	'QSvgAnimateColor::setArgs': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	828	
Warning	C4273	'QSvgAnimateColor::setFreeze': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	834	
Warning	C4273	'QSvgAnimateColor::setRepeatCount': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	839	
Warning	C4273	'QSvgAnimateColor::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	844	
Warning	C4273	'QSvgAnimateColor::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	902	
Warning	C4273	'QSvgAnimateColor::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	911	
Warning	C4273	'QSvgOpacityStyle::QSvgOpacityStyle': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	916	
Warning	C4273	'QSvgOpacityStyle::apply': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	922	
Warning	C4273	'QSvgOpacityStyle::revert': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	928	
Warning	C4273	'QSvgOpacityStyle::type': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	933	
Warning	C4273	'QSvgGradientStyle::setStopLink': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	938	
Warning	C4273	'QSvgGradientStyle::resolveStops': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	944	
Warning	C4273	'QSvgGradientStyle::resolveStops_helper': inconsistent dll linkage	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgstyle.cpp	950	
Error	C1083	Cannot open include file: 'private/qcssparser_p.h': No such file or directory (compiling source file qsvgtinydocument.cpp)	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvghandler_p.h	59	
Error	C1083	Cannot open include file: 'private/qwidget_p.h': No such file or directory	svg	X:\xxxxx\qt5\qtsvg\src\svg\qsvgwidget.cpp	48

I'm not really an expert about compiling third party libraries, I haven't much time to spend to a such task, and I just want to compile the QtSVG module, or at least be able to debug its code. Without that I will not be able to fix an issue which I'm pretty sure to be able to fix, which would be a shame.

So is there a simple way to compile just a particular module from the Qt source code? How can I achieve that? Has someone already achieved a such task and could point me how to do that (or at least a document explainig how to do that)?

And, considering the above errors and warning, am I far or close to be able to compile the source code?

jeanmilost · wrote on 15 May 2020, 21:38

Ok so I followed the instructions of this document: https://wiki.qt.io/Building_Qt_5_from_Git#Getting_the_source_code, and this resolved my issue.

As an additional question, what is the better way to submit a patched code to the Qt team? I have fixed the following bug in the QtSvg module: https://bugreports.qt.io/browse/QTBUG-82779, now I want to open a pull request. I forked (but I'm not sure it's the right version) the module source code from here: https://github.com/qt/qtsvg, and I'm ready to post a pull request from my fork. Is the good way to do that? Or how should I propose my modifications otherwise?

TomBombadill · wrote on 12 May 2020, 03:50

Hi JeanMilost,

there are many ways to compile QT Projects or Parts of QT. If you want debug a part of QT you should build a complete Debug Version od QT. Many documents describe what is to do.

configure -developer-build -debug-and-release -opensource -platform win32-msvc2019 -opengl desktop -confirm-license

for example. Then "make" and you can go visit your friends because for that you computer need a long time. With my i7 6700 and 32 GB RAM it need 7 hours. After your computer finished to compile the qt Version you can open the PRO Files with VStudio Qt Extensions. The important thing is that the enviroment Variable QTDIR point to "/QTXXX/qtbase". Every include Path to QT should be relative to this path. In Visual Studio you can add "additional include folder(s)" with right click on project, settings, compile settings. Sorry, I don't use VS 2019 but many other versions. Unfortunalety MS like change Menus, and sortings in Trees. If you don't find how to set "additional include folder(s)" use the internet for find. There is a edit line you can add folders with semicolon separated relative paths like:

$(QTDIR)\include;
$(QTDIR)\include\QtWidgets;
$(QTDIR)\include\QtOpenGL;
$(QTDIR)\include\QtSvg;
$(QTDIR)\include\QtCore;
$(QTDIR)\include\QtGui;
$(QTDIR)\include\QtPrintSupport;
$(QTDIR)\include\QtConcurrent;
$(QTDIR)..\qtsvg\include;
$(QTDIR)..\qtsvg\include\QtSvg;
$(QTDIR)..\qtserialport\include;
$(QTDIR)..\qtserialport\include\QtSerialPort;
.\GeneratedFiles;
.\GeneratedFiles$(Configuration);
%(AdditionalIncludeDirectories)

Don't mißunderstand. All is in one line, like this:

$(QTDIR)\include;$(QTDIR)\include\QtWidgets; ...

Then the compiler can find the paths what are missing. This Line can have a huge count of paths, especially if you use 3rd Party Libs.

A warning on end. It's not easy to debug QT Libs in Windows. But it is an adventure.

jsulm · wrote on 12 May 2020, 04:51

@jeanmilost Please check configure parameters (configure -h). You can tell it which modules should not be compiled: https://doc.qt.io/qt-5/configure-options.html

jeanmilost · wrote on 15 May 2020, 21:38

Ok so I followed the instructions of this document: https://wiki.qt.io/Building_Qt_5_from_Git#Getting_the_source_code, and this resolved my issue.

As an additional question, what is the better way to submit a patched code to the Qt team? I have fixed the following bug in the QtSvg module: https://bugreports.qt.io/browse/QTBUG-82779, now I want to open a pull request. I forked (but I'm not sure it's the right version) the module source code from here: https://github.com/qt/qtsvg, and I'm ready to post a pull request from my fork. Is the good way to do that? Or how should I propose my modifications otherwise?

eyllanesc · wrote on 16 May 2020, 00:10

@jeanmilost Qt team does not use GH so a PR will not work, I recommend you check https://wiki.qt.io/Qt_Contribution_Guidelines

jeanmilost · wrote on 18 May 2020, 22:25

Thank you very much