On Sat, Dec 10, 2022 at 05:09:46PM +0100, Kornel Benko wrote:
> Am Sat, 10 Dec 2022 15:38:43 +0100
> schrieb Yu Jin <technikma...@gmail.com>:
>
> > Am Do., 8. Dez. 2022 um 16:11 Uhr schrieb Kornel Benko <kor...@lyx.org>:
> >
> > > Am Thu, 8 Dec 2022 09:52:29 -0500
> > > schrieb Scott Kostyshak <skost...@lyx.org>:
> > >
> > > > On Mon, Dec 05, 2022 at 10:15:18PM +0100, Yu Jin wrote:
> > > > > Am Mo., 5. Dez. 2022 um 10:39 Uhr schrieb Pavel Sanda <sa...@lyx.org>:
> > > > >
> > > > > >
> > > > > > Given that on major linux distributions will still link against qt5
> > > > > > I think stikcing for 2.4 with Qt 5 is just fine...
> > > > >
> > > > >
> > > > > I think my curiosity helped here :)
> > > > >
> > > > > So I found out that there is different version of zlib in the Qt
> > > versions,
> > > > > the working Qt has a version 1.2.11 (I can see it in the zlib.h in
> > > > > e.g.
> > > > > C:\Qt\6.3.1\msvc2019_64\include\QtZlib folder and the broken Qt
> > > Versions
> > > > > have 1.2.12 or 13.
> > > > > I digged a bit more and found that our projects in Visual Studio
> > > include
> > > > > those QtZlib folders for some reason:
> > > > > and lyx's zlib folder gets included further below which means it has
> > > lower
> > > > > priority. If I just remove the QtZlib include from the project,
> > > compilation
> > > > > works. Can we do something in CMake here so that QtZlib is not
> > > included?
> > > >
> > > > CC'ing Kornel if he has time to take a look at the CMake question.
> > > >
> > > > Scott
> > >
> > > I really have no idea. I don't even have QtZlib directory on my system.
> > > Even searching with 'apt-file find QtZlib'
> > >
> > > Ok so i found out that QtZlib is a dependency of QtCore and QtCore is a
> > dependency of Qt6Core5Compat. Since we have
> > include_directories(${Qt6Core5Compat_INCLUDE_DIRS})
> >
> > https://git.lyx.org/?p=lyx.git;a=blob;f=CMakeLists.txt;h=4a9c428d4a48c838f9e9cd61fab59c46a330b1b3;hb=HEAD#l837
> >
> > It includes those dirs. I don't know it does seem kinda suspicious to me,
> > because actually Qt forces everyone who needs Core to use QtZlib with that,
> > but I can't evaluate that. I just tried to add a
> > list(REMOVE_ITEM Qt6Core5Compat_INCLUDE_DIRS
> > "C:/Qt/6.4.1/msvc2019_64/include/QtZlib")
> > just before that include_directories command and it works
> > perfectly fine, everything compiles and runs as it should. With Qt5 it
> > works fine because we don't include any dirs there but we do with that
> > compatibility module.
> > What we could do is use this command:
> > list(REMOVE_ITEM Qt6Core5Compat_INCLUDE_DIRS
> > "${CMAKE_PREFIX_PATH}/include/QtZlib")
> > but it would rather be a workaround than a solution. Any thoughts?
>
> If this works for you, then I have no objection.
> Works for debian (it is noop there).
Yu Jin, does Kornel's patch indeed work for you? Even though it is a
workaround, since we don't have a better fix let's just go for it if it
works for you?
Scott
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