Re: Building gnuplot 6.0.0 on Linux Mint

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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