Version 1.2b on Raspberry Pi?

[mcinquino]

Hello,

Has anyone got version 1.2b running on a Raspberry Pi 4? I would like to use some of the new features in it.. primarily the shortcut keys. I tried to compile but got errors. I have version 1.1.8 running on the pi but that did not require the compiling process. Was wondering if there was a simpler way to get it running on a pi?

I followed the instructions shown from wiki here: https://github.com/Denvi/Candle/wiki/Compiling-for-Raspberry-Pi-4

[ondras12345]

Hi,
I think building from source is currently the best way to go.
You're probably just missing a few dependencies. Please post the exact errors you got.

[mcinquino]

Hello,

I made the changes to the 2 files as outlined. Below is what I get when I qmake and make.

pi@raspberrypi:~/Downloads/candle 12b/Candle-1.2b/src $ qmake candle.pro
Project WARNING: GL ES detected. VAO will be disabled.

pi@raspberrypi:~/Downloads/candle 12b/Candle-1.2b/src $ make
g++ -c -pipe -Z7 -Fdrelease\candle.pdb -O2 -Wall -W -D_REENTRANT -fPIC -DUNIX -DGLES -DsNan="65536" -DAPP_VERSION="1.2b" -D_USE_MATH_DEFINES -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_SERIALPORT_LIB -DQT_CORE_LIB -I. -isystem /usr/include/arm-linux-gnueabihf/qt5 -isystem /usr/include/arm-linux-gnueabihf/qt5/QtOpenGL -isystem /usr/include/arm-linux-gnueabihf/qt5/QtWidgets -isystem /usr/include/arm-linux-gnueabihf/qt5/QtGui -isystem /usr/include/arm-linux-gnueabihf/qt5/QtSerialPort -isystem /usr/include/arm-linux-gnueabihf/qt5/QtCore -I. -I. -I/usr/lib/arm-linux-gnueabihf/qt5/mkspecs/linux-g++ -o main.o main.cpp
g++: error: unrecognized command line option \u2018-Z7\u2019; did you mean \u2018-Z\u2019?
make: *** [Makefile:773: main.o] Error 1

Thanks,
Mike

[ondras12345]

This is not a complete tutorial. I don't currently have time to resolve the remaining issues. Hopefully someone can continue where I left off.

I don't currently have a RPi with GUI handy, so I fired up a VM with Raspberry Pi Desktop. It should be pretty much the same as on a real Pi.
Install the needed packages. This could use some cleanup as it probably installs quite a lot of unneeded stuff...

sudo apt install qt5-default libqt5serialport5-dev qttools5-dev-tools qtmultimedia5-dev qttools5-dev qtscript5-dev

Clone the repository and checkout to the Experimental branch (commit 07c4c34 at the time of writing).

git clone https://github.com/Denvi/Candle.git
cd Candle
git checkout Experimental

You'll need to patch a few .pro files:

sed 's:-L../designerplugins/customwidgetsplugin/release -lcustomwidgets:-L../designerplugins/customwidgetsplugin -lcustomwidgets:' -i src/candle/candle.pro
sed 's:../designerplugins/customwidgetsplugin/release -lcustomwidgets:../designerplugins/customwidgetsplugin -lcustomwidgets:' -i src/scriptbindings/qtbindings/qtscript_custom/qtscript_custom.pro

This should probably be fixed @Denvi

I have no idea why I need to do this, but the qtscript stuff failed to compile without this patch:

sed 's:\(Q_DECLARE_METATYPE(QList<QSslError >)\)://\1:' -i src/scriptbindings/generated_cpp/com_trolltech_qt_network/qtscriptshell_QNetworkReply.cpp
sed 's:\(Q_DECLARE_METATYPE(QSslConfiguration)\)://\1:' -i src/scriptbindings/generated_cpp/com_trolltech_qt_network/qtscriptshell_QNetworkReply.cpp

Compile everything:

qmake candle.pro
make

This can take quite a long time (26 minutes in my case), so please be patient.

See if it works:

./src/candle/Candle

In my case, it failed to find libcustomwidgets.so.
I fixed this by calling the program with this environment variable:

LD_LIBRARY_PATH="$PWD/src/designerplugins/customwidgetsplugin" ./src/candle/Candle

I haven't had time to play with this, so I don't know if everything works properly. But at least it started.

EDIT: The compilation process can be sped up significantly by using make's parallel mode. For example make -j 2 will run 2 simultaneous jobs. This reduced the time needed to compile everything to 17 minutes in my case. I only had a 2 core virtual CPU in the VM, but on the real Pi, you could probably benefit from using even more jobs.

[mcinquino]

Thank you. I will give this a try.

[ondras12345]

To make plugins work (hopefully):

ln -s ../scriptbindings/plugins/script src/candle/script
ln -s ../candleplugins src/candle/plugins

[yeyeto2788]

Hey @mcinquino!

I installed it on an x64 machine using a tool I created you can see the screenshot of it running. You may want to give it a try, I indeed used the grbl_1_1 on my tests but I don't see why it shouldn't work.