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Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

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  Install issue: fatal error: QtCore: No such file or directory  #include <QtCore> borgauf@gmail.com - 2017-10-14 09:01 -0700
    Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Ethan A Merritt <EAMerritt@gmail.com> - 2017-10-14 12:57 -0700
      Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Lawrence Bottorff <borgauf@gmail.com> - 2017-10-14 16:48 -0700
        Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Ethan A Merritt <EAMerritt@gmail.com> - 2017-10-14 21:17 -0700
          Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Karl Ratzsch <mail.kfr@gmx.net> - 2017-10-16 09:57 +0200
            Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Lawrence Bottorff <borgauf@gmail.com> - 2017-10-16 06:11 -0700
              Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Lawrence Bottorff <borgauf@gmail.com> - 2017-10-16 06:35 -0700
                Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore> Karl Ratzsch <mail.kfr@gmx.net> - 2017-10-16 19:11 +0200

#3772 — Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

I'm trying to install from source 5.2 on Ubuntu 17.04. At first I had this:

gnuplot wxterminal/wxt_gui.o: undefined reference to symbol 'XInitThreads'

Then I followed this:

http://knanagnostopoulos.blogspot.com/2016/02/ubuntu-1510-compiling-gnuplot-50-tweaks.html

But now I have 

qtterminal/qt_term.cpp:51:18: fatal error: QtCore: No such file or directory
 #include <QtCore>
                  ^
compilation terminated.
Makefile:916: recipe for target 'qtterminal/qt_term.o' failed
make[4]: *** [qtterminal/qt_term.o] Error 1
...

Any ideas what I need to do?

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#3773 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

borgauf@gmail.com wrote:

> I'm trying to install from source 5.2 on Ubuntu 17.04. At first I had
> this:
> 
> gnuplot wxterminal/wxt_gui.o: undefined reference to symbol
> 'XInitThreads'
> 
> Then I followed this:
> 
> http://knanagnostopoulos.blogspot.com/2016/02/ubuntu-1510-compiling-gnuplot-50-tweaks.html
> 
> But now I have
> 
> qtterminal/qt_term.cpp:51:18: fatal error: QtCore: No such file or
> directory
>  #include <QtCore>
>                   ^
> compilation terminated.
> Makefile:916: recipe for target 'qtterminal/qt_term.o' failed
> make[4]: *** [qtterminal/qt_term.o] Error 1
> ...
> 
> Any ideas what I need to do?

It looks that the search path for Qt libraries was not correctly 
configured by the autoconfigure script.   You would have to look
at the screen output from ./configure and perhaps the more detailed
output in config.log.

Failure at build time is a bit strange because normally if the 
configure script cannot find the appropriate libraries it disables
building the qt terminal and you just get a line
  qt terminal: no
in the output.

Anyhow, probably it just comes down to not having all of the 
needed qt development packages installed.  I don't know how
Ubuntu breaks those out but on my linux box that would include
lib64qt5widgets-devel
lib64qt5network-devel
lib64qt5core-devel
lib64qt5gui-devel
lib64qt5svg-devel
lib64qt5printsupport-devel
qttools5

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#3774 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

I don't have 

lib64qt5widgets-devel 
lib64qt5network-devel 
lib64qt5core-devel 
lib64qt5gui-devel 
lib64qt5svg-devel 
lib64qt5printsupport-devel

and Ubuntu doesn't seem to offer these. What Linux are you using?

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#3775 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

Lawrence Bottorff wrote:

> I don't have
> 
> lib64qt5widgets-devel
> lib64qt5network-devel
> lib64qt5core-devel
> lib64qt5gui-devel
> lib64qt5svg-devel
> lib64qt5printsupport-devel
> 
> and Ubuntu doesn't seem to offer these. What Linux are you using?

I'm using Mageia.

DIfferent distros split the Qt libraries out into different packages.
It looks to me that Ubuntu has a top-level package
 qtbase5-dev
that will pull in at least some of the other pieces as dependencies.

	Ethan

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#3779 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

Am 15.10.2017 um 06:17 schrieb Ethan A Merritt:

> DIfferent distros split the Qt libraries out into different packages.
> It looks to me that Ubuntu has a top-level package
>  qtbase5-dev
> that will pull in at least some of the other pieces as dependencies.

Last time I tried on ubuntu, you only additionally needed

  libqt5svg5-dev

evth. else is installed automatically with qtbase5-dev.

  Karl

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#3781 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

Thnaks. That got me a bit further along. But now I've got:


/usr/bin/ld: wxterminal/wxt_gui.o: undefined reference to symbol 'XInitThreads'
//usr/lib/x86_64-linux-gnu/libX11.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

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#3782 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

Hold the phone. I just found this:

http://gnuplot-beta.narkive.com/lCVNUILw/cvs-build-fails-on-ubuntu-14-04-i386

from Ethan 3 years ago, which says to try

TERMLIBS="-lX11" ./configure

and that did the trick.

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#3783 — Re: Install issue: fatal error: QtCore: No such file or directory #include <QtCore>

Am 16.10.2017 um 15:35 schrieb Lawrence Bottorff:
> Hold the phone. I just found this:
> 
> http://gnuplot-beta.narkive.com/lCVNUILw/cvs-build-fails-on-ubuntu-14-04-i386
> 
> from Ethan 3 years ago, which says to try
> 
> TERMLIBS="-lX11" ./configure
> 
> and that did the trick.
> 

That info you would also have found under "known issues" in the
release notes. ;-)

  Karl

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