Re: Building gnuplot 6.0.0 on Linux Mint

I have looked at this again and did not manage to solve anything.

A few possibly relevant comments:

- adding Qt6Widgets in line 1065 of configure,ac does not solve the issue:

1065          PKG_CHECK_MODULES_NOFAIL(QT, [Qt6Core Qt6Gui Qt6Network 
Qt6Svg Qt6PrintSupport Qt6Core5Compat Qt6Widgets])

but -Qt6Widgets is not included in config.status

644    S["QT_LIBS"]="-lQt6Network -lQt6Svg -lQt6Gui -lQt6PrintSupport 
-lQt6Core5Compat -lQt6Core"

Admittedly, I am not an expert on this things. But I find it baffling 
that everything seems to be in place yet Qt6Widgetsis not found. Also 
QtApplication is problematic but I did not look in detail.


- And in case this is of interest: line 16323 of the configure script: 
"Enable parsing of deprecated syntax" should be commented. It is not in 
the original file and givs a warning that the Enable command is not found.

Nothing of this is possibly a gnuplot problem. But would be nice to get 
it working.


Have a nice day

H.



Den 2024-05-17 kl. 03:02, skrev Ethan Merritt:
> Gnuplot still runs quite happily with Qt5.
> Indeed, the configure script falls back to linking against Qt5 if it thinks
> that Qt6 is not present.  The issue seems to be that some linux distros
> install enough pieces of Qt6 that the configure script thinks it is present
> rather than thinking it is absent and so it doesn't fall back to Qt5 instead.
> You could tell it to skip the check for Qt6 and move straight to trying Qt5:
>      ./configure --with-qt=qt5
>
> Summary instructions for building with Qt5 under Ubuntu / Debian
> are in the INSTALL file that is part of the gnuplot distribution.
>
> If/when someone feeds back an equivalent recipe for Qt6 I will add that to
> the INSTALL file.   And certainly if there are tweaks to the configure script
> itself to make it less sensitive to distro-specific quirks, those can be added
> as well.
>
> For what it's worth, here is a complete list of the Qt6 devel packages
> installed on my Mageia 9  machine with Qt 6.4.
> I don't think every one of them is needed by gnuplot, but you can at
> least get an idea of which modules have a separate devel package.
>
> qtbase6-common-devel-6.4.1
> lib64qt6core-devel-6.4.1
> lib64qt6opengl-devel-6.4.1
> lib64qt6xcbqpa-devel-6.4.1
> lib64qt6dbus-devel-6.4.1
> lib64qt6gui-devel-6.4.1
> lib64qt6eglfsdeviceintegration-devel-6.4.1
> lib64qt6core5compat-devel-6.4.1
> lib64qt6widgets-devel-6.4.1
> lib64qt6printsupport-devel-6.4.1
> lib64qt6network-devel-6.4.1
> lib64qt6svg-devel-6.4.1
>
> The list for Qt6.6 is longer, but I have not had to modify anything
> to configure and link gnuplot.   I think Qt is now up to version 6.7
> but I have not tried that yet.
>
> 	Ethan
>
>
>
> On Thursday, 16 May 2024 14:31:38 PDT Peter Rockett via gnuplot-info wrote:
>> OK. But I am not sure that helps me with my Debian-based problem. And
>> hacking configure.ac files is not something I could do without an awful
>> lot of work.
>>
>> When I ignore the configure output and just run make anyway, my build
>> chokes on:
>>
>> qtterminal/qt_term.cpp:51:10: fatal error: QtCore: No such file or directory
>>      51 | #include <QtCore>
>>
>> Note: different from Hernán's issue that chokes on #include <QApplication>
>>
>> On Mint (derived from Debian), looking in
>> /usr/include/x86_64-linux-gnu/qt6/QtCore, I can see no header called
>> QtCore! (Note the architecture-dependent path!) So I am clearly missing
>> some dependency.
>>
>> "I am surprised that the various linux distros have diverged so much in
>> how they split up Qt components for packaging." Indeed. I was reading
>> Hernán's post and the list of stunningly obvious package names in
>> openSUSE, and thinking "This looks so sensible!" (compared to the
>> hunt-the-dependency dog's breakfast that is the Debian packaging of Qt).
>> Bear in mind that Ubuntu is one of the most popular Linux distros.
>>
>> This may pose a troublesome issue for gnuplot going forward. It seems
>> that the gnuplot build has /de facto/ been broken already - maybe some
>> adaptive maintenance is needed? P.
>>
>>
>> On 16/05/2024 18:54, Ethan Merritt wrote:
>>> On Thursday, 16 May 2024 00:25:24 PDT Hernán De Angelis wrote:
>>>> Well it seems that I am now having some issues building as well ... QtApplication and QtWidget are apparently not found.
>>>>
>>>> In file included from qtterminal/qt_term.cpp:78:
>>>>
>>>> qtterminal/QtGnuplotApplication.h:49:10: fatal error: QApplication: No such file or directory
>>>>
>>>>       49 | #include <QApplication>
>>>>
>>>>          |          ^~~~~~~~~~~~~~
>>>>
>>>> compilation terminated.
>>> This was recently reported for Fedora also.  In the Fedora case the answer was to
>>> add Qt6Widgets as a separate dependency in the autotools configure.ac script.
>>> The package itself was already pulled in by other Qt dependencies, but apparently
>>> without a separate test the compiler preprocessor flag  -I/usr/include/qt6/QtWidgets
>>> was not added to the Makefile.  Adding that to environmental variable CXX_FLAGS
>>> prior to running "./configure" may be sufficient to get you going for now.
>>>
>>> 	https://sourceforge.net/p/gnuplot/bugs/2705/
>>>
>>> I am surprised that the various linux distros have diverged so much in how they
>>> split up Qt components for packaging.
>>>
>>> When you figure out what the missing piece is for building on Mint, please let me
>>> know so I can add that fix to the gnuplot patchlevel 6.0.1 release.
>>>
>>> 	Ethan
>>>
>>>> make[4]: *** [Makefile:1044: qtterminal/qt_term.o] Error 1
>>>>
>>>> make[4]: *** Waiting for unfinished jobs....
>>>>
>>>> In file included from qtterminal/qt_embed_example.cpp:44:
>>>>
>>>> qtterminal/qt_embed_example.h:51:10: fatal error: QWidget: No such file or directory
>>>>
>>>>       51 | #include <QWidget>
>>>>
>>>>          |          ^~~~~~~~~
>>>>
>>>> compilation terminated.
>>>>
>>>> make[4]: *** [Makefile:1044: qtterminal/qt_embed_example.o] Error 1
>>>>
>>>> In file included from qtterminal/QtGnuplotInstance.cpp:45:
>>>>
>>>> qtterminal/QtGnuplotWidget.h:49:10: fatal error: QWidget: No such file or directory
>>>>
>>>>       49 | #include <QWidget>
>>>>
>>>>          |          ^~~~~~~~~
>>>>
>>>> compilation terminated.
>>>>
>>>> make[4]: *** [Makefile:1044: qtterminal/QtGnuplotInstance.o] Error 1
>>>>
>>>> In file included from qtterminal/gnuplot_qt.cpp:44:
>>>>
>>>> qtterminal/QtGnuplotApplication.h:49:10: fatal error: QApplication: No such file or directory
>>>>
>>>>       49 | #include <QApplication>
>>>>
>>>>          |          ^~~~~~~~~~~~~~
>>>>
>>>> compilation terminated.
>>>>
>>>>
>>>> Den 2024-05-16 kl. 09:08, skrev Hernán De Angelis:
>>>>> Peter,
>>>>>
>>>>> I always build gnuplot from source, although in openSUSE Tumbleweed.
>>>>> With 6.0.0 I had some problems too. Those were solved by looking at
>>>>> the error messages and installing the corresponding packages. I ended
>>>>> up having a lot of Qt6 packages but Since I build other things based
>>>>> in Qt  I do not see this as problematic. Perhaps the list below helps,
>>>>> with packages as they are referred to in openSUSE.
>>>>>
>>>>> Good luck
>>>>>
>>>>> H.
>>>>>
>>>>>
>>>>> No package 'Qt6Core' found
>>>>>
>>>>> qt6-core-devel           | Development files for the Qt 6 Core library
>>>>>
>>>>>
>>>>> No package 'Qt6Gui' found
>>>>>
>>>>> qt6-gui-devel         | Development files for the Qt 6 GUI libraries
>>>>>
>>>>>
>>>>> No package 'Qt6Network' found
>>>>>
>>>>> qt6-network-devel           | Development files for the Qt 6 Network
>>>>> library
>>>>>
>>>>>
>>>>> No package 'Qt6Svg' found
>>>>>
>>>>> qt6-svg-devel | Qt 6 SVG libraries - Development files
>>>>>
>>>>>
>>>>> No package 'Qt6PrintSupport' found
>>>>>
>>>>> qt6-printsupport-devel | Development files for the Qt 6 PrintSupport
>>>>> library
>>>>>
>>>>>
>>>>> No package 'Qt6Core5Compat' found
>>>>>
>>>>> qt6-qt5compat-devel | Qt 6 Core 5 Compat library - Development files
>>>>>
>>>>>
>>>>> Den 2024-05-15 kl. 21:58, skrev Peter Rockett via gnuplot-info:
>>>>>> Hi
>>>>>>
>>>>>> I am trying to build gnuplot 6.0.0 on Linux Mint 21.3 from source but
>>>>>> struggling with the Qt dependencies. I used to be able to build
>>>>>> gnuplot 5 no problem using just qt5-base-dev and libqt5svg5-dev but
>>>>>> running ./configure for gnuplot 6.0.0 with what seem to be the Qt6
>>>>>> versions of these same packages installed (qt6-base-dev and
>>>>>> libqt6svg6-dev) returns:
>>>>>>
>>>>>> No package 'Qt6Core' found
>>>>>> No package 'Qt6Gui' found
>>>>>> No package 'Qt6Network' found
>>>>>> No package 'Qt6Svg' found
>>>>>> No package 'Qt6PrintSupport' found
>>>>>> No package 'Qt6Core5Compat' found
>>>>>>
>>>>>> Also, adding libqt6core5compat6-dev does not fix the last of these
>>>>>> errors (about 'Qt6Core5Compat').
>>>>>>
>>>>>> Does anybody know the list of Qt6 packages I need to satisfy the
>>>>>> above dependencies? From what I can see, qt6-base-dev should provide
>>>>>> the core, gui, network and print support stuff but it plainly does
>>>>>> not. Similarly, the svg package should provide the svg stuff.
>>>>>>
>>>>>> Peter
>
>
>
>
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