Screenshot of my application
I wrote an application (launcher creator like Linux Mint's) in Qt 5.15.2 version. I completed developing and everything was ok.
Then, I wanted to check it if working at any computer without Qt installed.
For this, I checked the dependency of the application file on my computer (Ubuntu 20.04 LTS) with ldd command like below
ldd LauncherCreator
result:
linux-vdso.so.1 (0x00007ffe2c7a9000)
libQt5Widgets.so.5 => /opt/Qt/5.15.2/gcc_64/lib/libQt5Widgets.so.5 (0x00007f2d1eae1000)
libQt5Gui.so.5 => /opt/Qt/5.15.2/gcc_64/lib/libQt5Gui.so.5 (0x00007f2d1e1b0000)
libQt5Core.so.5 => /opt/Qt/5.15.2/gcc_64/lib/libQt5Core.so.5 (0x00007f2d1d9ba000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f2d1d7c6000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f2d1d7ab000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2d1d5b9000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f2d1d594000)
libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f2d1d50c000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f2d1d3bd000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f2d1d3a1000)
libicui18n.so.56 => /opt/Qt/5.15.2/gcc_64/lib/libicui18n.so.56 (0x00007f2d1cf08000)
libicuuc.so.56 => /opt/Qt/5.15.2/gcc_64/lib/libicuuc.so.56 (0x00007f2d1cb50000)
libicudata.so.56 => /opt/Qt/5.15.2/gcc_64/lib/libicudata.so.56 (0x00007f2d1b16b000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f2d1b165000)
libgthread-2.0.so.0 => /lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f2d1b160000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f2d1b037000)
/lib64/ld-linux-x86-64.so.2 (0x00007f2d1f35c000)
libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f2d1af7f000)
libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f2d1af49000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f2d1aed6000)
libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f2d1ad99000)
libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f2d1ad6f000)
libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f2d1ad69000)
libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f2d1ad5f000)
libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f2d1ad45000)
To solve this problem, I only copied libraries that appeared above related to Qt and pasted to a new folder called lib.
I wrote an installer script for other computers to download necessary libraries and install properly. (Maybe the real problem is here. Pay attention to STEP 4)
#!/bin/bash
sudo echo -----------------------------
# install libGL
echo -----------------------------
echo 'STEP 1: install libGL'
echo
sudo apt install libgl1-mesa-dev -y
# create application folder
echo -----------------------------
echo 'STEP 2: create application folder'
echo
cd /opt/
sudo rm -r LauncherCreator
sudo mkdir LauncherCreator
cd LauncherCreator
sudo mkdir lib
# go into the temporary folder
cd ~/Desktop/temp_LauncherCreator
# change mode to executable
chmod +x ~/Desktop/temp_LauncherCreator/BUILD/LauncherCreator
chmod +x ~/Desktop/temp_LauncherCreator/uninstall_LauncherCreator.sh
# copy files to application folder
echo -----------------------------
echo 'STEP 3: copy files application folder'
echo
sudo cp ~/Desktop/temp_LauncherCreator/BUILD/LauncherCreator /opt/LauncherCreator
sudo cp ~/Desktop/temp_LauncherCreator/LauncherCreator/rocket.ico /opt/LauncherCreator
sudo cp ~/Desktop/temp_LauncherCreator/currentVersion /opt/LauncherCreator
sudo cp ~/Desktop/temp_LauncherCreator/uninstall_LauncherCreator.sh /opt/LauncherCreator
sudo cp ~/Desktop/temp_LauncherCreator/lib/* /opt/LauncherCreator/lib/
# create links
echo -----------------------------
echo 'STEP 4: create links for lib'
echo
cd /opt/LauncherCreator/lib
sudo ln -s libicudata.so.56.1 libicudata.so.56
sudo ln -s libicudata.so.56 libicudata.so
sudo ln -s libicui18n.so.56.1 libicui18n.so.56
sudo ln -s libicui18n.so.56 libicui18n.so
sudo ln -s libicuuc.so.56.1 libicuuc.so.56
sudo ln -s libicuuc.so.56 libicuuc.so
sudo ln -s libQt5Core.so.5.15.2 libQt5Core.so.5.15
sudo ln -s libQt5Core.so.5.15 libQt5Core.so.5
sudo ln -s libQt5Core.so.5 libQt5Core.so
sudo ln -s libQt5Gui.so.5.15.2 libQt5Gui.so.5.15
sudo ln -s libQt5Gui.so.5.15 libQt5Gui.so.5
sudo ln -s libQt5Gui.so.5 libQt5Gui.so
sudo ln -s libQt5Widgets.so.5.15.2 libQt5Widgets.so.5.15
sudo ln -s libQt5Widgets.so.5.15 libQt5Widgets.so.5
sudo ln -s libQt5Widgets.so.5 libQt5Widgets.so
# copy launcher to /usr/share/applications/
echo -----------------------------
echo 'STEP 5: copy launcher'
echo
chmod +x ~/Desktop/temp_LauncherCreator/Launcher_Generator.desktop
sudo cp ~/Desktop/temp_LauncherCreator/Launcher_Generator.desktop /usr/share/applications/
# remove temporary folder
echo -----------------------------
echo 'STEP 6: remove temporary folder'
echo
sudo rm -r ~/Desktop/temp_LauncherCreator
# update applications
echo -----------------------------
echo 'STEP 7: update applications'
echo
sudo apt install update -y
####
echo
echo 'OK'
echo
echo '-----------------------------'
echo 'Bunyamin TAMAR'
echo 'linkedin.com/in/bunyamintamar'
echo 'December 2021'
echo '-----------------------------'
echo
sleep 5
/opt/LauncherCreator/LauncherCreator
exit
This is my pro file:
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
SOURCES += $$files("*.cpp", false)
HEADERS += $$files("*.h", false)
FORMS += $$files("*.ui", false)
RESOURCES += $$files("*.qrc", false)
This application works perfectly in my computer with Qt 5.15. But, at the other computer (Ubuntu 20.04 LTS), it doesn't work.
How can I solve this problem?
You can also see this files on my GitHub account. If I solve this problem, will share this application on my blog.
(only the name of the application there is different)
