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Update build instructions for Qt6 on Debian/Ubuntu #753

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Merged
milianw merged 1 commit into from
Jan 28, 2026
Merged

Update build instructions for Qt6 on Debian/Ubuntu #753

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21 changes: 11 additions & 10 deletions HACKING.md
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Original file line number Diff line number Diff line change
Expand Up @@ -61,28 +61,27 @@ As of now, you will need the following dependencies to build this project:

### On Debian/Ubuntu

#### For Qt5

```bash
add-apt-repository ppa:kubuntu-ppa/backports
apt-get update
apt-get install libkf5threadweaver-dev libkf5i18n-dev libkf5configwidgets-dev libkf5syntaxhighlighting-dev \
libkf5coreaddons-dev libkf5itemviews-dev libkf5itemmodels-dev libkf5kio-dev libkf5parts-dev \
libkf5solid-dev libkf5windowsystem-dev libkf5notifications-dev libkf5iconthemes-dev libelf-dev \
libdw-dev cmake extra-cmake-modules gettext libqt5svg5-dev
```

Note: Ubuntu 20.04 does not provide the minimal version of QT, if you use this old Ubuntu version then
you'd need to _additionally_ install it from a version outside of the distro repository.
The automatic builds via GitHub actions [use the following][Ubuntu2004Script] for that:
#### For Qt6

```bash
sudo add-apt-repository ppa:beineri/opt-qt-5.15.4-focal
sudo apt-get update
sudo apt-get install -y qt515base qt515svg qt515x11extras \
libqt5x11extras5-dev # this one is optional for Hotspot, but required for KDDockWidgets
apt-get update
apt-get install libkf6threadweaver-dev libkf6i18n-dev libkf6configwidgets-dev libkf6syntaxhighlighting-dev \
libkf6coreaddons-dev libkf6itemviews-dev libkf6itemmodels-dev libkf6kio-dev libkf6parts-dev \
libkf6solid-dev libkf6windowsystem-dev libkf6notifications-dev libkf6iconthemes-dev libelf-dev \
libdw-dev libdwarf-dev libdebuginfod-dev cmake extra-cmake-modules qt6-svg-dev libzstd-dev \
libkddockwidgets-qt6-dev kgraphviewer-dev libqcustomplot-dev
```

[Ubuntu2004Script]:https://github.com/KDAB/hotspot/blob/master/scripts/compile-test/BaseUbuntu20.04

### On Fedora

```bash
Expand Down Expand Up @@ -124,6 +123,8 @@ make
# or `make install` it and launch it from your $PATH
```

To build for Qt6 pass `-DQT6_BUILD=ON` when running the `cmake` command.

If you need help building this project for your platform, [contact us for help](https://www.kdab.com/about/contact/).

## Online
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2 changes: 1 addition & 1 deletion cmake/FindQCustomPlot.cmake
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Expand Up @@ -30,7 +30,7 @@
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

find_library(QCustomPlot_LIBRARY NAMES qcustomplot-qt${QT_MAJOR_VERSION} qcustomplot)
find_library(QCustomPlot_LIBRARY NAMES qcustomplot-qt${QT_MAJOR_VERSION} qcustomplot QCustomPlotQt${QT_MAJOR_VERSION})
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@milianw milianw Jan 28, 2026

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for the future: these are two patches - one fixes the QCustomPlot library name as used on Debian, the other updates the build instructions.

I'll let it pass, but please think of such splits to make patches atomic

set(QCustomPlot_LIBRARIES "${QCustomPlot_LIBRARY}")

find_path(QCustomPlot_INCLUDE_DIR NAMES qcustomplot.h)
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