[Development] Where and how does Qt define which platforms are supported?

Vladimir Minenko vminenko at blackberry.com
Tue Oct 22 15:33:04 CEST 2013

Hi all,

during one of the last release meetings, we had a chat about "Tier 1" or reference platforms. I mentioned that IMHO the "Tier 1" notion known in Qt prior Qt5 is not used in Qt5 anymore. I was not able to provide references off the top of my head, and now I took some time to collect references. I post it now to the dev list to get feedback/opinions from all.

Since I was missing a reliable navigation, I used a search on Google with a limit in its scope:

* site:qt-project.org/wiki
* site:doc-snapshot.qt-project.org/qt5

I observed the following:

* The Qt5 documentation does not use the "Tier" notion to define levels of platform support. At least Google does not find the word "Tier" in docs. A grep over the entire source code of most modules does not bring any results either. Instead, "reference configurations" are defined: http://doc-snapshot.qt-project.org/qt5-nosubdir/supported-platforms.html

* The Qt Project wiki does know "Tier 1", but in turn, it does not know "reference configurations". Plus, it provides its own version of related definitions: http://qt-project.org/wiki/Platform_Support, including a dead link to Qt docs (I was about to correct it, but did find that page in docs anymore). The wiki also mentions the key word "Tier" on a few other pages, e.g. http://qt-project.org/wiki/Qt-Quality-Gate-Criteria

* Still, the context of Qt5 apparently has some traces of the "Tier" definition, e.g. it names Windows Embedded Compact 7 a Tier 2 platform, see http://qt-project.org/wiki/New-Features-in-Qt-5.1

Finally, a search over emails on the dev list (site:lists.qt-project.org/pipermail/development) brings more classifications/proposals:

The purpose of this email is not to point out something what is not done or wrong. The purpose of this email to initiate a discussion and a work to get this done and create a clear definition where Qt runs on and how related platforms are classified.

Opinions/feedback? Who is going to join a work on this? Can this topic get on the todo list for the final 5.2 release?


This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

More information about the Development mailing list