Switch to Qt 6 and C++17 #6516

davidebeatrici · 2024-07-20T23:10:18Z

Requires thorough testing, especially the regex changes.

Krzmbrzl

Haven't looked through all changes yet.

How did you manage the C++17 dependency though?

Krzmbrzl · 2024-07-21T05:43:22Z

src/Group.cpp

@@ -195,7 +195,7 @@ bool Group::appliesToUser(const Channel &currentChannel, const Channel &aclChann
 			channel = channel->cParent;
 		}

-		int requiredChannelIndex = currentChannelHierarchy.indexOf(contextChannel);
+		auto requiredChannelIndex = currentChannelHierarchy.indexOf(contextChannel);


Invalid use of auto

Krzmbrzl · 2024-07-21T05:43:43Z

src/Group.cpp

@@ -211,10 +211,10 @@ bool Group::appliesToUser(const Channel &currentChannel, const Channel &aclChann
 			return RET_FALSE;
 		}

-		const int minDepth = requiredChannelIndex + minDescendantLevel;
-		const int maxDepth = requiredChannelIndex + maxDescendantLevel;
+		const auto minDepth = requiredChannelIndex + minDescendantLevel;


Invalid use of auto

Krzmbrzl · 2024-07-21T05:43:57Z

src/Group.cpp

-		const int minDepth = requiredChannelIndex + minDescendantLevel;
-		const int maxDepth = requiredChannelIndex + maxDescendantLevel;
+		const auto minDepth = requiredChannelIndex + minDescendantLevel;
+		const auto maxDepth = requiredChannelIndex + maxDescendantLevel;


Invalid use of auto

Krzmbrzl · 2024-07-21T05:44:05Z

src/Group.cpp


-		const int totalDepth = homeChannelHierarchy.count() - 1;
+		const auto totalDepth = homeChannelHierarchy.count() - 1;


Invalid use of auto

Krzmbrzl · 2024-07-21T05:44:22Z

src/ProcessResolver.cpp

@@ -154,15 +154,15 @@ void ProcessResolver::doResolve() {
 				QByteArray cmdline = f.readAll();
 				f.close();

-				int nul = cmdline.indexOf('\0');
+				const auto nul = cmdline.indexOf('\0');


Invalid use of auto

Krzmbrzl · 2024-07-21T05:49:18Z

src/mumble/GlobalShortcut.cpp

@@ -580,7 +583,11 @@ QString ShortcutDelegate::displayText(const QVariant &item, const QLocale &loc)
 			}
 		}
 		default:
+#if QT_VERSION >= 0x060000


Keep only Qt6

Krzmbrzl · 2024-07-21T05:49:30Z

src/mumble/GlobalShortcut.cpp

@@ -849,7 +856,11 @@ QTreeWidgetItem *GlobalShortcutConfig::itemForShortcut(const Shortcut &sc) const
 	::GlobalShortcut *gs  = GlobalShortcutEngine::engine->qmShortcuts.value(sc.iIndex);

 	item->setData(0, Qt::DisplayRole, static_cast< unsigned int >(sc.iIndex));
+#if QT_VERSION >= 0x060000


Keep only Qt6

Krzmbrzl · 2024-07-21T05:49:38Z

src/mumble/GlobalShortcut.cpp

@@ -953,7 +964,7 @@ void GlobalShortcutEngine::remap() {
 			sk->gs          = gs;

 			foreach (const QVariant &button, sc.qlButtons) {
-				int idx = qlButtonList.indexOf(button);
+				auto idx = qlButtonList.indexOf(button);


Invalid use of auto

Krzmbrzl · 2024-07-21T05:49:46Z

src/mumble/GlobalShortcut.cpp

@@ -1026,7 +1037,7 @@ bool GlobalShortcutEngine::handleButton(const QVariant &button, bool down) {
 		}
 	}

-	int idx = qlButtonList.indexOf(button);
+	const auto idx = qlButtonList.indexOf(button);


Invalid use of auto

Krzmbrzl · 2024-07-21T05:50:14Z

src/mumble/GlobalShortcut_win.cpp

@@ -193,25 +193,33 @@ void GlobalShortcutWin::registerMetaTypes() {
 		registered = true;

 		qRegisterMetaType< InputHid >();
+#if QT_VERSION < 0x060000


Not needed if we fully switch

davidebeatrici · 2024-07-21T13:23:29Z

I would like to keep support for Qt 5 at least until the next stable release, but don't want to write a preprocessor block for every qsizetype (int64_t) vs int instance.

I followed Qt's recommendation:

Note: If you want to build against both Qt 5 and Qt 6, the auto keyword is a good solution to cover signature differences between the versions.

Krzmbrzl · 2024-07-21T15:01:05Z

Why do you want to keep Qt5 support? It is EOL already and Qt6 has been around for so long as to be available on all platforms that we want to support (afaik) 🤔

davidebeatrici · 2024-07-21T15:55:58Z

Right:

https://www.qt.io/blog/qt-5.15-extended-support-for-subscription-license-holders

In that case we have to prepare a Qt 6 vcpkg environment.

Krzmbrzl · 2024-07-21T16:02:26Z

In that case we have to prepare a Qt 6 vcpkg environment.

Yep

Coming back to the C++17 requirement though: how did you manage it so that nothing breaks? 🤔

davidebeatrici · 2024-07-21T16:44:16Z

Well, there is one thing "broken": we use the <codecvt> header to convert between UTF-8 and UTF-16 and it was deprecated in C++17, resulting in a warning.

Unfortunately there is no standard replacement, we'll have to rely on something like https://github.com/nemtrif/utfcpp.

As for ZeroC Ice: the headers that make use of std::binary_function and std::unary_function are patched in our fork (which we use in our vcpkg port):

mumble-voip/ice@bc7eb3e
mumble-voip/ice@e1e88d8

Upstream seems to have fixed the issue in v3.7.7: zeroc-ice/ice@bc2762e

In conclusion: before merging this PR we should build with Qt 6 to make sure that there are no issues on any platforms.

davidebeatrici · 2024-07-22T00:41:30Z

#6517

davidebeatrici · 2024-07-23T02:01:11Z

E: Unable to locate package qt6-svg-dev

The name was libqt6svg6-dev before...

davidebeatrici · 2024-07-23T02:02:43Z

src/mumble/PluginUpdater.h

-	UpdateEntry() = default;
-


I added this change by mistake, it's supposed to fix a separate issue:

src/mumble/PluginUpdater.cpp:49:18: error: no matching constructor for initialization of 'UpdateEntry' 49 | UpdateEntry entry = { plugin->getID(), updateURL, updateURL.fileName(), 0 }; | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ src/mumble/PluginUpdater.h:30:8: note: candidate constructor (the implicit copy constructor) not viable: requires 1 argument, but 4 were provided 30 | struct UpdateEntry { | ^~~~~~~~~~~ src/mumble/PluginUpdater.h:30:8: note: candidate constructor (the implicit move constructor) not viable: requires 1 argument, but 4 were provided 30 | struct UpdateEntry { | ^~~~~~~~~~~ src/mumble/PluginUpdater.h:31:2: note: candidate constructor not viable: requires 0 arguments, but 4 were provided 31 | UpdateEntry() = default; | ^

OpenMandrivaAssociation/mumble@df75805

davidebeatrici · 2024-08-19T02:49:13Z

E: Unable to locate package qt6-svg-dev
The name was libqt6svg6-dev before...

Despite libqt6svg6-dev being installed just fine, CMake is unable to find Qt's "Svg" component.

The package seemingly contains the required files, which leads me to think something is broken.

Unfortunately we cannot switch to Ubuntu 24.04 in Azure Pipelines because not publicly available yet: actions/runner-images#9848 (comment)

davidebeatrici · 2024-08-19T22:28:25Z

I ended up adding 24.04's repository and installing the Qt packages from there.

Krzmbrzl · 2024-08-20T18:27:24Z

We can't exclusively use 24.04 though. At least we have to also have a CI for 22.04

davidebeatrici · 2024-08-20T22:28:23Z

The base system is still 22.04, but I can see why we should test the Qt packages that are normally provided with it.

Unfortunately we have no choice other than reporting the bug upstream and hoping for a quick fix.

Krzmbrzl · 2024-08-21T05:06:55Z

Yeah, we should report it. However, until this is fixed I think we should just wait with merging this PR. At least for a couple of weeks to see what the maintainers will do with the reported issue. 👀

davidebeatrici · 2024-08-21T22:50:27Z

I created a VM with a minimal Ubuntu 22.04 installation and quickly found out what the issue was: missing libgl-dev.

Our build log actually gave us a hint, but I missed it as I focused on the specific component (Svg). Turns out the find_pkg() error is inaccurate: NONE of the GUI-related components were found; or rather, they were ignored due to the missing dependency.

-- Could NOT find OpenGL (missing: OPENGL_INCLUDE_DIR) 
CMake Error at cmake/pkg-utils.cmake:87 (message):
  Qt6 component not found: Svg
Call Stack (most recent call first):
  src/mumble/CMakeLists.txt:76 (find_pkg)

A minimal CMake project with the standard find_package() call reveals a more accurate log:

-- Could NOT find OpenGL (missing: OPENGL_INCLUDE_DIR) 
-- Could NOT find WrapOpenGL (missing: WrapOpenGL_FOUND) 
CMake Warning at /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake:219 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6Gui/Qt6GuiConfig.cmake

  but it set Qt6Gui_FOUND to FALSE so package "Qt6Gui" is considered to be
  NOT FOUND.  Reason given by package:

  Qt6Gui could not be found because dependency WrapOpenGL could not be found.

Call Stack (most recent call first):
  CMakeLists.txt:5 (find_package)


-- Could NOT find OpenGL (missing: OPENGL_INCLUDE_DIR) 
-- Could NOT find WrapOpenGL (missing: WrapOpenGL_FOUND) 
CMake Warning at /usr/share/cmake-3.22/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6Gui/Qt6GuiConfig.cmake

  but it set Qt6Gui_FOUND to FALSE so package "Qt6Gui" is considered to be
  NOT FOUND.  Reason given by package:

  Qt6Gui could not be found because dependency WrapOpenGL could not be found.

Call Stack (most recent call first):
  /usr/lib/x86_64-linux-gnu/cmake/Qt6/QtPublicDependencyHelpers.cmake:14 (find_dependency)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6Svg/Qt6SvgDependencies.cmake:96 (_qt_internal_find_dependencies)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6Svg/Qt6SvgConfig.cmake:50 (include)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake:219 (find_package)
  CMakeLists.txt:5 (find_package)


CMake Warning at /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake:219 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6Svg/Qt6SvgConfig.cmake

  but it set Qt6Svg_FOUND to FALSE so package "Qt6Svg" is considered to be
  NOT FOUND.  Reason given by package:

  Qt6Svg could not be found because dependency Qt6Gui could not be found.

Call Stack (most recent call first):
  CMakeLists.txt:5 (find_package)


-- Could NOT find OpenGL (missing: OPENGL_INCLUDE_DIR) 
-- Could NOT find WrapOpenGL (missing: WrapOpenGL_FOUND) 
CMake Warning at /usr/share/cmake-3.22/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6Gui/Qt6GuiConfig.cmake

  but it set Qt6Gui_FOUND to FALSE so package "Qt6Gui" is considered to be
  NOT FOUND.  Reason given by package:

  Qt6Gui could not be found because dependency WrapOpenGL could not be found.

Call Stack (most recent call first):
  /usr/lib/x86_64-linux-gnu/cmake/Qt6/QtPublicDependencyHelpers.cmake:14 (find_dependency)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6Widgets/Qt6WidgetsDependencies.cmake:96 (_qt_internal_find_dependencies)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6Widgets/Qt6WidgetsConfig.cmake:50 (include)
  /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake:219 (find_package)
  CMakeLists.txt:5 (find_package)


CMake Warning at /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake:219 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6Widgets/Qt6WidgetsConfig.cmake

  but it set Qt6Widgets_FOUND to FALSE so package "Qt6Widgets" is considered
  to be NOT FOUND.  Reason given by package:

  Qt6Widgets could not be found because dependency Qt6Gui could not be found.

Call Stack (most recent call first):
  CMakeLists.txt:5 (find_package)


CMake Error at CMakeLists.txt:5 (find_package):
  Found package configuration file:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake

  but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
  FOUND.  Reason given by package:

  Failed to find Qt component "Gui".

  Expected Config file at
  "/usr/lib/x86_64-linux-gnu/cmake/Qt6Gui/Qt6GuiConfig.cmake" exists

  Failed to find Qt component "Svg".

  Expected Config file at
  "/usr/lib/x86_64-linux-gnu/cmake/Qt6Svg/Qt6SvgConfig.cmake" exists

  Failed to find Qt component "Widgets".

  Expected Config file at
  "/usr/lib/x86_64-linux-gnu/cmake/Qt6Widgets/Qt6WidgetsConfig.cmake" exists

Please note that libgl-dev is pulled in automatically with the packages from Ubuntu 24.04, meaning that it's effectively a bug that should be reported.

davidebeatrici · 2024-09-17T00:30:50Z

Formatted with clang-format 10, in order for CI to succeed.

… for sizes https://doc.qt.io/qt-6/qtcore-changes-qt6.html#api-changes

botanegg · 2024-09-20T13:45:04Z

Try it on archlinux from aur

Seems like it laggy on first time Settings window was opened

davidebeatrici · 2024-09-20T14:24:06Z

It feels sluggish when you open the Settings window, but only the first time?

botanegg · 2024-09-27T16:26:51Z

Found it (Mumble (1.6.0) from 5782f61 with Qt 6.7.2)
At the time I open the Settings window it writes to console next log

<W>2024-09-27 23:23:08.481   OpenType support missing for "Ubuntu", script 11
<W>2024-09-27 23:23:08.484   OpenType support missing for "Droid Sans", script 11
<W>2024-09-27 23:23:08.484   OpenType support missing for "DejaVu Sans", script 11

..... <removed more than 3000 lines> ...

<W>2024-09-27 23:23:09.948   OpenType support missing for "Input Mono", script 17
<W>2024-09-27 23:23:09.948   OpenType support missing for "Input Serif", script 17

~1.5s total :)

Hartmnt · 2024-09-27T16:30:16Z

Probably related #4927 and maybe even #5922

botanegg · 2024-09-27T16:32:20Z

Will recheck on latest release with qt5 (not on master)

botanegg · 2024-09-27T16:35:30Z

Its OK with Mumble (1.5.634) with Qt 5.15.15

only 1 line in console log

<W>2024-09-27 23:34:10.102   OpenType support missing for "Droid Sans", script 11

Hartmnt · 2024-09-27T16:37:39Z

Yea, I think this will be a very hard to track race condition kind of bug. Depending on exact version and system configuration and stuff...

botanegg · 2024-09-27T19:04:10Z

Fonts scan triggered by

mumble/src/mumble/ConfigDialog.cpp

Line 103 in c043779

QSize ms = cw->minimumSizeHint();

for LookConfig

UPD: yep, look like a race

Krzmbrzl · 2024-09-28T12:05:18Z

To me this kinda looks like a Qt issue because afaict we are not doing any explicit font manipulation kn our end 👀

Hartmnt · 2024-09-28T12:14:32Z

To me this kinda looks like a Qt issue because afaict we are not doing any explicit font manipulation kn our end 👀

From what I have read so far, this is a combination of our stylesheet usage and the inability of Qt to properly maintain their stylesheet support. Trying to fix this will likely mean wrestling with Qt for like two weeks again. Additionally, one needs to reliably recreate this bug, which I have not managed to do so far

Guanran928 · 2024-10-01T05:06:17Z

Hi, are there any plans for updating the documentation for macOS and Windows?

mumble/docs/dev/build-instructions/build_macos.md

Line 16 in dfa59b1

qt5 \

mumble/docs/dev/build-instructions/build_static.md

Lines 45 to 49 in dfa59b1

    
           qt5-base[mysqlplugin] 
        
           qt5-base[postgresqlplugin] 
        
           qt5-svg 
        
           qt5-tools 
        
           qt5-translations

davidebeatrici · 2024-10-01T10:46:58Z

Sure, should've been done in #6572.

Krzmbrzl · 2024-10-01T20:39:47Z

It's (kinda) done via #6588

davidebeatrici requested review from Hartmnt and Krzmbrzl July 20, 2024 23:10

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davidebeatrici force-pushed the qt6-support branch from 1edb151 to ef6f556 Compare July 21, 2024 02:52

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davidebeatrici mentioned this pull request Aug 1, 2024

WIP: FEAT(client): Add support to XDG Desktop Portal GlobalShortcuts #5976

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Remove deprecated QStandardPaths from config fallback chain #6459

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Remove deprecated QStandardPaths from config fallback chain #6459

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davidebeatrici changed the title ~~FEAT: Add Qt 6 support~~ Switch to Qt 6 and C++17 Aug 19, 2024

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CI(github-actions): Update Ubuntu runners #6537

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BUILD: Disable MSVC 17.8 warning for stdext::checked_array_iterator #6554

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davidebeatrici added 3 commits September 19, 2024 04:43

FEAT: Add Qt 6 support

c043779

FIX: Warnings due to Qt containers now using qsizetype instead of int…

ef97a5d

… for sizes https://doc.qt.io/qt-6/qtcore-changes-qt6.html#api-changes

BUILD: Switch to Qt 6 and C++17

de91daa

davidebeatrici force-pushed the qt6-support branch from f5f46d2 to de91daa Compare September 19, 2024 02:46

davidebeatrici merged commit 7101060 into mumble-voip:master Sep 19, 2024
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davidebeatrici deleted the qt6-support branch September 19, 2024 03:20


		const int totalDepth = homeChannelHierarchy.count() - 1;
		const auto totalDepth = homeChannelHierarchy.count() - 1;

Switch to Qt 6 and C++17 #6516

Switch to Qt 6 and C++17 #6516

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