[Development] Commercial-only LTS phase starts: Closing the 5.15 branch(es) on 5th January

David Edmundson davidedmundson at kde.org
Mon Jan 4 23:38:33 CET 2021

I need some version clarification.

Is Qt 5.15.3 in the "strict" phase of the Qt LTS?

I have approved changes into Qt 5.15.3 under the assumption that we
are still in the stable phase, as I have not seen any emails to the

I assumed this as the QUIP [1]  states:
>strict: This period starts when the one after next stable branch is created (for the 5.12 LTS, the one after next was 5.14). Upgrading the Qt libraries (within LTS) must not put installed applications at risk of breaking. Breaking existing bug workarounds is therefore not allowed, even if the bug is fixed.

Which we are not yet in for Qt 5.15.

The same QUIP also states:

>Note: From 5.15 onwards, the extension of the stable phase becomes a service for users of Qt under the commercial license.

If Qt 5.15.3 is for commercial users only, we must have entered the
strict phase.
Can you clarify which LTS state Qt 5.15.3 will be in. I might need to
double check my approvals.

David Edmundson

[1] http://quips-qt-io.herokuapp.com/quip-0016-branch-policy.html

More information about the Development mailing list