Cross platform packaging of QT packaging program

This article is about linux Program packaging in the system , First, let's create a simple program , My program is called debtest

Then set the qmake source , This directly determines what the program depends on qt Location of the library , If we need to specify qt Location of the standard library , that qt The environment needs to be in that position .
Before the change ： The location of the default library used



How to use the link library path specified by ourselves , First, you need to compile the source code yourself or directly copy the installed qt Environmental Science , as follows

Put this gcc_64 The copy of the directory should be in the location we specify .

Then configure qt


Then delete the old execution file , Build new , Then check the location of the link library of the execution file , Found that it has been changed to the location we specified .

Now get ready to pack , Before packaging, we need a program to find the relevant library linuxdeployqt, Use the method to see the tutorial linuxdeployqt course
And then use linuxdeployqt debtest --appimage after , Will generate a lib Folders and one plugins Folder , We'll use... Later ,
Now create a packaging folder

Create a... In this folder DEBIAN Folder , Create two files in this folder

control Is the information configuration file ,

postinst Is the script execution file during installation , This file can do some root Next operation .
Of course Deian There are other control files in the installation package ： Such as

preinst： Debian software package (".deb") Script executed before decompression , Stop related services for the package being upgraded , Until the upgrade or installation is complete . ( Execute... After success postinst Script ).
postinst： Mainly complete the software package (".deb") Configuration work required after installation . Usually , postinst The script requires the user to enter , and / Or warn the user if they accept the default value , You should remember to go back and reconfigure the software as required . After a software package is installed or upgraded ,postinst
Script driven commands , Start or restart the corresponding service .
prerm： Stop a package related process , To uninstall the relevant files of the package, execute .
postrm： Modify relevant files or connections , and / Or uninstall the files created by the package . All current configuration files can be found in /var/lib/dpkg/info In the directory , And foo Package related names are named after “foo” start , With “preinst”, “postinst”, Equal as extension . In this directory foo.list File lists all the files installed by the software package .Debian In the use apt-get When installing or uninstalling software , Pre processing or post-processing errors often occur , At this time, just delete the corresponding script file , Re install or uninstall

Then create a folder to put the packaged files , This folder will correspond to the root path , If you name mkdir -p uer/local/bin Words , Then the program will be installed in /usr/local/bin/ below , The name here is as follows .

And then put the just lib and plugins Put all the files in , There are also executive documents and associated （ Such as icon file ）, as follows

Why create qtlib, Because this corresponds to the library link location above , As shown in the figure, this library is linked in debtest/qtlib Next
Now go back to the executable directory and start packaging
After packing , Installation sudo dpkg -i debdir/debtest.deb

installation is complete , Then go to the installation directory to execute , This time may prompt
qt.qpa.plugin: Could not find the Qt platform plugin “xcb” in “”
This is because plugins Not loaded into . resolvent
After solving the problem, you can start the program .