[Development] Qt Static Package

Carlos Enrique Pérez Sánchez ceperez1996 at gmail.com
Sat Apr 20 02:56:15 CEST 2019

I invited Mitch Curtis to join the discussion. He may have a word on this
since he is actively working on the Qt Quick Controls 2 module. Hope he can
help us here. Making a working static build of Qt Quick Controls 2 can push
forward the release of static packages.

El vie., 19 abr. 2019 a las 20:31, Carlos Enrique Pérez Sánchez (<
ceperez1996 at gmail.com>) escribió:

> By the way. I have made no changes to my .pro file after build my static
> version of Qt. The reason is that the Qt Doc says (
> https://doc.qt.io/qt-5/plugins-howto.html#static-plugins):
>> Plugins can be linked statically into your application. If you build the
>> static version of Qt, this is the only option for including Qt's predefined
>> plugins. Using static plugins makes the deployment less error-prone, but
>> has the disadvantage that no functionality from plugins can be added
>> without a complete rebuild and redistribution of the application.
>> To link plugins statically, you need to add the required plugins to your
>> build using QTPLUGIN.
>> In the .pro file for your application, you need the following entry:
>>   QTPLUGIN     += qjpeg \
>>                   qgif \
>>                   qkrcodecs
>> qmake automatically adds the plugins to QTPLUGIN that are typically
>> needed by the Qt modules used (see QT
>> <http://../qmake/qmake-variable-reference.html#qt>), while more
>> specialized plugins need to be added manually.
> So, according with this, I have no need of importing Qt plugind related to
> Qt Quick Controls 2. Also, I have checked that the qmlimportscanner works
> appropriatelly.
> The page Deploying Qt Quick Controls 2 Applications says the following
> about static linking:
>> For dynamically built applications, it is not necessary to import a
>> specific style that should be usable by that application. For statically
>> built applications, Qt's build system must be involved to ensure that QML
>> plugins function as expected. Specifically, qmake uses qmlimportscanner
>> to scan the QML files in your application for import statements. For this
>> reason, any styles that should be usable by a statically built application
>> must explicitly import that style. Where the import occurs is up to the
>> developer, but it is recommended to follow the approach mentioned in the Deploying
>> an Application with Several Styles
>> <http://qtquickcontrols2-deployment.html#deploying-an-application-with-several-styles>
>> section, so that only the minimum set of files that are necessary for a
>> particular device are deployed.
> So, they should be built QQC2 statically before (because if not, document
> that makes no sense) and they says that the only requirement is explicitly
> importing the style plugin. Sadly, that does not work for me.
> El vie., 19 abr. 2019 a las 19:45, Carlos Enrique Pérez Sánchez (<
> ceperez1996 at gmail.com>) escribió:
>> Thanks, Thiago. I will build Qt statically today on Windows, and I will
>> try using the system version. Same with Linux. However, I really don't
>> think that doing that solves the problem with the static linking of QtQuick
>> Controls 2 module. Thanks in advance.
>> El jue., 18 abr. 2019 a las 23:23, Thiago Macieira (<
>> thiago.macieira at intel.com>) escribió:
>>> On Friday, 19 April 2019 08:11:41 +08 Carlos Enrique Pérez Sánchez wrote:
>>> > ```
>>> > ./configure -prefix "/somePath/Qt512Static" -static -release
>>> -opensource
>>> > -confirm-license -qt-zlib -qt-pcre -qt-libpng -qt-libjpeg -fontconfig
>>> > -qt-xcb -opengl desktop -sql-sqlite -make libs -make tools -nomake
>>> examples
>>> > -nomake tests -skip qtwebengine
>>> > ```
>>> Please note the -qt-zlib option and family: if you choose to use the
>>> bundled
>>> versions from Qt, you'll need to monitor those upstreams for security
>>> issues
>>> and, if any is found, rebuild your application after applying the fix to
>>> the
>>> sources bundled in Qt.
>>> Far better to use -system-zlib and family.
>>> --
>>> Thiago Macieira - thiago.macieira (AT) intel.com
>>>   Software Architect - Intel System Software Products
>>> _______________________________________________
>>> Development mailing list
>>> Development at qt-project.org
>>> https://lists.qt-project.org/listinfo/development
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