pkg-config can not find Qt5Help. Some package files are missing

[tomdean]

> lsb_release -rd
Description: Ubuntu 18.04.3 LTS
Release: 18.04

> apt-cache policy libqt5help5
libqt5help5:
  Installed: 5.9.5-0ubuntu1
  Candidate: 5.9.5-0ubuntu1
  Version table:
 *** 5.9.5-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status

Building Octave from HG sources shows the package is broken.
I created /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc
containing
    prefix=/usr
    exec_prefix=${prefix}
    libdir=${prefix}/lib/x86_64-linux-gnu
    includedir=${prefix}/include/x86_64-linux-gnu/qt5

    Name: Qt5 Help
    Description: Qt Help module
    Version: 5.9.5
    Libs: -lQt5help
    Cflags: -I${includedir}/QtGui -I${includedir}
and pkg-config satisfied --exists.
But, compiling showed some of the files are missing.
...
QtHelp/QHelpEngine: No such file or directory
#include <QtHelp/QHelpEngine>

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libqt5help5 5.9.5-0ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-31.33~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-31-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
Date: Sat Jan 4 00:29:00 2020
InstallationDate: Installed on 2019-08-25 (131 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: qttools-opensource-src
UpgradeStatus: No upgrade log present (probably fresh install)

[Dmitry Shachnev (mitya57)]

Do you have qttools5-dev package installed?

[tomdean (tomdean)]

On 1/4/20 12:50 AM, Dmitry Shachnev wrote:
> Do you have qttools5-dev package installed?
>
> ** Changed in: qttools-opensource-src (Ubuntu)
> Status: New => Incomplete
>

 >
 > dpkg -l | grep qttools5-dev
ii qttools5-dev-tools 5.9.5-0ubuntu1 amd64 Qt 5 development tools

Tom Dean

[Dmitry Shachnev (mitya57)]

Then /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc is already present. Why did you create it manually?

https://packages.ubuntu.com/bionic/amd64/qttools5-dev/filelist

In your manually created file the include path is wrong. You need to replace -I${includedir}/QtGui with -I${includedir}/QtHelp.

[tomdean (tomdean)]

On 2020-01-04 01:22, Dmitry Shachnev wrote:
> Then /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc is already present.
> Why did you create it manually?
>
> https://packages.ubuntu.com/bionic/amd64/qttools5-dev/filelist
>
> In your manually created file the include path is wrong. You need to
> replace -I${includedir}/QtGui with -I${includedir}/QtHelp.
>

I created the file /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc to see
if that was part of the problem.

The file Qt5Help.pc was not on my system.

 > sudo apt-get install libqt5help5 --reinstall
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer
required:
   linux-headers-4.15.0-70 linux-headers-4.15.0-70-generic
   linux-headers-5.0.0-32 linux-headers-5.0.0-32-generic
   linux-image-4.15.0-70-generic linux-image-5.0.0-32-generic
   linux-modules-4.15.0-70-generic linux-modules-5.0.0-32-generic
   linux-modules-extra-4.15.0-70-generic
linux-modules-extra-5.0.0-32-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 15 not
upgraded.
Need to get 0 B/133 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 414587 files and directories currently installed.)
Preparing to unpack .../libqt5help5_5.9.5-0ubuntu1_amd64.deb ...
Unpacking libqt5help5:amd64 (5.9.5-0ubuntu1) over (5.9.5-0ubuntu1) ...
Setting up libqt5help5:amd64 (5.9.5-0ubuntu1) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...

 > ls /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc
ls: cannot access '/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc': No
such file or directory

Several of the .h files are missing.

Tom Dean

[Dmitry Shachnev (mitya57)]

You reinstalled libqt5help5, but please try also reinstalling qttools5-dev.

That is the package that contains the .pc and header files.

/usr/include/x86_64-linux-gnu/qt5/QtHelp/QHelpEngine is present in that package. If some other includes are missing, please let me know which ones.

[tomdean (tomdean)]

On 2020-01-04 02:07, Dmitry Shachnev wrote:
> You reinstalled libqt5help5, but please try also reinstalling
> qttools5-dev.
>
> That is the package that contains the .pc and header files.
>
> /usr/include/x86_64-linux-gnu/qt5/QtHelp/QHelpEngine is present in that
> package. If some other includes are missing, please let me know which
> ones.
>

Thanks, now I have the .pc file and QHelpEngine.

I will clean out my octave build tree and see if that fixes all the qt5
issues.

Please mark this as closed.

Tom Dean