error: redefinition of ‘struct QMetaTypeId<QSocketNotifier::Type>’

[wryan67]

Versions

• Candle version: 1.2.15b
• Firmware version: 1.1

PC info

• OS: Ubuntu 22.04
• OpenGL version: 4.5

Describe the bug
During compile of Candle version 1.2.15b, we're getting an error compiling qtscript_QSocketNotifier.cpp:

To Reproduce
Steps to reproduce the behavior:

1. check out Experimental branch
2. Run qmake
3. remove the word "relase" from the LIBS customwidgestplugin/release path
4. Run make
5. see error

Expected behavior
Obviously would like to have a clean compile happen.

Example compile log showing the error

g++ -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_PLUGIN -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_SCRIPT_LIB -DQT_CONCURRENT_LIB -DQT_CORE_LIB -I. -I. -Iinclude -I/usr/include/x86_64-linux-gnu/qt5 -I/usr/include/x86_64-linux-gnu/qt5/QtWidgets -I/usr/include/x86_64-linux-gnu/qt5/QtGui -I/usr/include/x86_64-linux-gnu/qt5/QtScript -I/usr/include/x86_64-linux-gnu/qt5/QtConcurrent -I/usr/include/x86_64-linux-gnu/qt5/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o qtscript_QSocketNotifier.o ../../generated_cpp/com_trolltech_qt_core/qtscript_QSocketNotifier.cpp
In file included from /usr/include/x86_64-linux-gnu/qt5/QtScript/qscriptengine.h:43,
from /usr/include/x86_64-linux-gnu/qt5/QtScript/QScriptEngine:1,
from ../../generated_cpp/com_trolltech_qt_core/qtscript_QSocketNotifier.cpp:1:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qmetatype.h:2060:12: error: redefinition of ‘struct QMetaTypeIdQSocketNotifier::Type’
2060 | struct QMetaTypeId< TYPE >
| ^~~~~~~~~~~~~~~~~~~

[mar0x]

Hello,
For Qt >5.15 you may need to apply some of these changes or use Experimental-fixes branch if you don't want to cherry-pick changes.

[wryan67]

Thank you so, so much! That was a great help! I have it compiled on Ubuntu now. FYI, here is a list of packages I had to install in case anyone needs them:

$ grep DES /etc/lsb-release 
DISTRIB_DESCRIPTION="Ubuntu 22.04.2 LTS"

$ sudo apt update
$ sudo apt upgrade -y
$ sudo apt install \
  g++ git qt5-qmake qttools5-dev qttools5-dev-tools \
  libqt5serialport5-dev libqt5opengl5-dev \
  build-essential automake autoconf autoconf-archive \
  libtool libboost-program-options-dev \
  libgtkmm-2.4-dev gerbv git librsvg2-dev qtmultimedia5-dev \
  libqt5multimediawidgets5 libqt5multimedia5-plugins libqt5multimedia5 \
  qttools5-dev qttools5-dev-tools qtscript5-dev 

[wryan67]

I'm now trying to get candle running on a raspberry pi 4, running ubuntu desktop 22.04 (jammy). I was thinking I needed an environment variable, but not sure. When not using any variables, candle starts, but the visualizer is blank. When I set the QT_QPA_PLATFORM variable to eglfs, I get the following error, any ideas on how to resolve this issue?

$ export QT_QPA_PLATFORM=eglfs
$ ./candle 
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
style "Windows"
style "Fusion"
EGLFS: OpenGL windows cannot be mixed with others.
Aborted (core dumped)

System info:

$ cat /proc/cpuinfo  | grep Model
Model		: Raspberry Pi 4 Model B Rev 1.4

$ glxinfo | grep -i "opengl version"
OpenGL version string: 2.1 Mesa 22.2.5-0ubuntu0.1~22.04.3

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=22.04
DISTRIB_CODENAME=jammy
DISTRIB_DESCRIPTION="Ubuntu 22.04.2 LTS"

[mar0x]

I have no experience with RPi 4 + jammy + Candle 1.2b yet, but I've successfully built and run Candle-1.1 with fixes on RPi 3 B + Raspbian (bullseye). Here it is Candle-1.1.9-armhf.AppImage.