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Qt offering changes 2020 (https://www.qt.io/blog/qt-offering-changes-2020 https://www.qt.io/blog/qt-offering-changes-2020) - Installation of Qt binaries will

Qt offering changes 2020 (https://www.qt.io/blog/qt-offering-changes-2020 https://www.qt.io/blog/qt-offering-changes-2020) - Installation of Qt binaries will require a Qt Account - Long-term-supported (LTS) releases and the offline installer will become available to commercial licensees only --- Starting with Qt 5.15, long term support (LTS) will only be available to commercial customers. This means open-source users will receive patch-level releases of 5.15 until the next minor release will become available. This means that we will handle Qt 5.15 in the same way as e.g. 5.13 or 5.14 for open source users.

enriquto 6y ago
> Installation of Qt binaries will require a Qt Account How is this compatible wit the LGPL? Can't I host a compiled copy of Qt and let the world install it?
- Thev00d00 6y ago
  Correct, you can do exactly that.
  - enriquto 6y ago
    So how does this make Qt "anti open-source"? I'm not saying that they aren't, but they are under no obligation to provide binaries to anybody (under any free software license). Many bona-fide free software packages do not provide binaries at all.
    - vetinari 6y ago
      You won't get any sources to 5.15.x after 5.16 or 6 is out.
      - majewsky 6y ago
        So these mirrors don't exist then? https://download.qt.io/static/mirrorlist/ https://download.qt.io/static/mirrorlist/
        vetinari 6y ago
        Again: to 5.15.x after 5.16 or 6 is out. Or, in more words as Qt pusts it: > Starting with Qt 5.15, long term support (LTS) will only be available to commercial customers. This means open-source users will receive patch-level releases of 5.15 until the next minor release will become available. This means that we will handle Qt 5.15 in the same way as e.g. 5.13 or 5.14 for open source users. It has nothing to do whether mirrors do exist or not, when there will be nothing to mirror.
      - torarnv 6y ago
        That's incorrect. The 5.15 branch is and will be public. Most if not all changes to that branch will go via the dev (Qt 6) branch, which is also public.
        vetinari 6y ago
        Straight from the Qt (link above): > Starting with Qt 5.15, long term support (LTS) will only be available to commercial customers. This means open-source users will receive patch-level releases of 5.15 until the next minor release will become available. This means that we will handle Qt 5.15 in the same way as e.g. 5.13 or 5.14 for open source users.
    - shakna 6y ago
      Qt have indicated to KDE that they'll be lagging the open source code behind the binaries by upwards of twelve months. [0] > But last week, the company suddenly informed both the KDE e.V. board and the KDE Free QT Foundation that the economic outlook caused by the Corona virus puts more pressure on them to increase short-term revenue. As a result, they are thinking about restricting ALL Qt releases to paid license holders for the first 12 months. They are aware that this would mean the end of contributions via Open Governance in practice. [0] https://mail.kde.org/pipermail/kde-community/2020q2/006098.html https://mail.kde.org/pipermail/kde-community/2020q2/006098.h...
- gsnedders 6y ago
  Qt is released under two different licenses: there's the open source release and the commercial release. Qt hasn't for a while distributed binaries for the open source release, but there were publicly downloadable binaries for the trial version of the commercial release which is what has now gone. But as you say, nothing stops _others_ from distributing binaries for the open source release.
- deng 6y ago
  > Can't I host a compiled copy of Qt and let the world install it? Of course you can do that, as long as you respect the LGPL. That's what pretty much every Linux distribution is doing. It's just that the old Qt offline installer by the QtCompany is no longer available.
- phoe-krk 6y ago
  Obviously you can. The officially sanctioned Qt binaries will require a Qt account before they can be downloaded though.
- jhasse 6y ago
  If you compiled it yourself, yes. The Qt source code is available under the LGPL (among other options), the binaries provided on the Qt website are not.
- ognarb 6y ago
  As a matter of fact, all the Linux distribution distribute Qt and I don't remember creating an Qt Account for downloading the KDE/Qt applications I use and Plasma from my distro.
- csdreamer7 6y ago
  The Qt company owns the copyright to the Qt source code so they can sell (L)GPL exceptions. Bundling LGPL code in a binary, as mobile may require, instead of loading as dynamic library, requires you to get an LGPL exception from the copyright holder (or provide an object file for the user to relink). Other licenses, like Apache and the EPL, do not have this issue. Companies can do this for open source projects. They require you to sign a contributor agreement handing over over copyright or require you license the code to them under the MIT. For the most part, differs based on region and IANAL. Edit: corrected in () that you can comply with the LGPL with static binaries with providing an object file to the user to relink with.
  - enriquto 6y ago
    > Bundling LGPL code in a binary, as mobile may require, instead of loading as dynamic library, requires you to get an LGPL exception from the copyright holder. How come? The LGPL allows people to distribute statically compiled binaries that use Qt, you do not need an exception for that.
    - csdreamer7 6y ago
      > The LGPL allows people to distribute statically compiled binaries that use Qt Hmmm... you can as long as you provide an object. Learned something new today. I do remember Mike discussing that on Coder Radio that would be an issue in the security industry. I assuming there were some aerospace libraries that are NDAed/restricted by national security laws. https://stackoverflow.com/questions/10130143/gpl-lgpl-and-static-linking https://stackoverflow.com/questions/10130143/gpl-lgpl-and-st... http://www.gnu.org/licenses/gpl-faq.html#LGPLStaticVsDynamic http://www.gnu.org/licenses/gpl-faq.html#LGPLStaticVsDynamic Is this possible on iOS? Not familiar with iOS dev, but I assume Apple may have some TOS problems with that.
      - jcelerier 6y ago
        It is, Cisco does it for one of their apps which uses Gstreamer on iOS. See the note here at the end: https://github.com/freedesktop/gstreamer/blob/master/README.static-linking https://github.com/freedesktop/gstreamer/blob/master/README....
- varelaz 6y ago
  Sure you can, but QT will not be responsible for compatibility of your binaries, and I for example would not use yours, instead I'll try use some official biniries from Canonical for example even older ones.
rleigh 6y ago
> - Installation of Qt binaries will require a Qt Account vcpkg install qt5 With vcpkg and other alteratives in the picture, it's far less hassle to use that than mess around with the slow and flaky installer tool.
de_watcher 6y ago
> Installation of Qt binaries will require a Qt Account Distributions ship binaries with OS anyways. You won't have to build it yourself.
- vetinari 6y ago
  Opensource doesn't mean Linux distributions only. Project like VLC or QGIS have releases not only for Linux, but for Windows and Mac too.
  - pritambaral 6y ago
    Don't those platforms have their own package distributions? macOS has homebrew, and I hear Windows has a few.
  - de_watcher 6y ago
    Well, when you target Windows or Mac it's a mess anyway: when your project reaches certain level of complexity then you probably build Qt alongside with it. But I think that adding friction to the "download binaries from some site" is doing nothing more than alienating Windows developers. Qt just must add something like "Sign in with Google/Facebook with one click" because this audience cares about convenience.

enriquto 6y ago

> Installation of Qt binaries will require a Qt Account How is this compatible wit the LGPL? Can't I host a compiled copy of Qt and let the world install it?

Thev00d00 6y ago
Correct, you can do exactly that.
- enriquto 6y ago
  So how does this make Qt "anti open-source"? I'm not saying that they aren't, but they are under no obligation to provide binaries to anybody (under any free software license). Many bona-fide free software packages do not provide binaries at all.
  - vetinari 6y ago
    You won't get any sources to 5.15.x after 5.16 or 6 is out.
    - majewsky 6y ago
      So these mirrors don't exist then? https://download.qt.io/static/mirrorlist/ https://download.qt.io/static/mirrorlist/
      - vetinari 6y ago
        Again: to 5.15.x after 5.16 or 6 is out. Or, in more words as Qt pusts it: > Starting with Qt 5.15, long term support (LTS) will only be available to commercial customers. This means open-source users will receive patch-level releases of 5.15 until the next minor release will become available. This means that we will handle Qt 5.15 in the same way as e.g. 5.13 or 5.14 for open source users. It has nothing to do whether mirrors do exist or not, when there will be nothing to mirror.
    - torarnv 6y ago
      That's incorrect. The 5.15 branch is and will be public. Most if not all changes to that branch will go via the dev (Qt 6) branch, which is also public.
      - vetinari 6y ago
        Straight from the Qt (link above): > Starting with Qt 5.15, long term support (LTS) will only be available to commercial customers. This means open-source users will receive patch-level releases of 5.15 until the next minor release will become available. This means that we will handle Qt 5.15 in the same way as e.g. 5.13 or 5.14 for open source users.
  - shakna 6y ago
    Qt have indicated to KDE that they'll be lagging the open source code behind the binaries by upwards of twelve months. [0] > But last week, the company suddenly informed both the KDE e.V. board and the KDE Free QT Foundation that the economic outlook caused by the Corona virus puts more pressure on them to increase short-term revenue. As a result, they are thinking about restricting ALL Qt releases to paid license holders for the first 12 months. They are aware that this would mean the end of contributions via Open Governance in practice. [0] https://mail.kde.org/pipermail/kde-community/2020q2/006098.html https://mail.kde.org/pipermail/kde-community/2020q2/006098.h...
gsnedders 6y ago
Qt is released under two different licenses: there's the open source release and the commercial release. Qt hasn't for a while distributed binaries for the open source release, but there were publicly downloadable binaries for the trial version of the commercial release which is what has now gone. But as you say, nothing stops _others_ from distributing binaries for the open source release.
deng 6y ago
> Can't I host a compiled copy of Qt and let the world install it? Of course you can do that, as long as you respect the LGPL. That's what pretty much every Linux distribution is doing. It's just that the old Qt offline installer by the QtCompany is no longer available.
phoe-krk 6y ago
Obviously you can. The officially sanctioned Qt binaries will require a Qt account before they can be downloaded though.
jhasse 6y ago
If you compiled it yourself, yes. The Qt source code is available under the LGPL (among other options), the binaries provided on the Qt website are not.
ognarb 6y ago
As a matter of fact, all the Linux distribution distribute Qt and I don't remember creating an Qt Account for downloading the KDE/Qt applications I use and Plasma from my distro.
csdreamer7 6y ago
The Qt company owns the copyright to the Qt source code so they can sell (L)GPL exceptions. Bundling LGPL code in a binary, as mobile may require, instead of loading as dynamic library, requires you to get an LGPL exception from the copyright holder (or provide an object file for the user to relink). Other licenses, like Apache and the EPL, do not have this issue. Companies can do this for open source projects. They require you to sign a contributor agreement handing over over copyright or require you license the code to them under the MIT. For the most part, differs based on region and IANAL. Edit: corrected in () that you can comply with the LGPL with static binaries with providing an object file to the user to relink with.
- enriquto 6y ago
  > Bundling LGPL code in a binary, as mobile may require, instead of loading as dynamic library, requires you to get an LGPL exception from the copyright holder. How come? The LGPL allows people to distribute statically compiled binaries that use Qt, you do not need an exception for that.
  - csdreamer7 6y ago
    > The LGPL allows people to distribute statically compiled binaries that use Qt Hmmm... you can as long as you provide an object. Learned something new today. I do remember Mike discussing that on Coder Radio that would be an issue in the security industry. I assuming there were some aerospace libraries that are NDAed/restricted by national security laws. https://stackoverflow.com/questions/10130143/gpl-lgpl-and-static-linking https://stackoverflow.com/questions/10130143/gpl-lgpl-and-st... http://www.gnu.org/licenses/gpl-faq.html#LGPLStaticVsDynamic http://www.gnu.org/licenses/gpl-faq.html#LGPLStaticVsDynamic Is this possible on iOS? Not familiar with iOS dev, but I assume Apple may have some TOS problems with that.
    - jcelerier 6y ago
      It is, Cisco does it for one of their apps which uses Gstreamer on iOS. See the note here at the end: https://github.com/freedesktop/gstreamer/blob/master/README.static-linking https://github.com/freedesktop/gstreamer/blob/master/README....
varelaz 6y ago
Sure you can, but QT will not be responsible for compatibility of your binaries, and I for example would not use yours, instead I'll try use some official biniries from Canonical for example even older ones.

rleigh 6y ago

> - Installation of Qt binaries will require a Qt Account vcpkg install qt5 With vcpkg and other alteratives in the picture, it's far less hassle to use that than mess around with the slow and flaky installer tool.

de_watcher 6y ago

> Installation of Qt binaries will require a Qt Account Distributions ship binaries with OS anyways. You won't have to build it yourself.

vetinari 6y ago
Opensource doesn't mean Linux distributions only. Project like VLC or QGIS have releases not only for Linux, but for Windows and Mac too.
- pritambaral 6y ago
  Don't those platforms have their own package distributions? macOS has homebrew, and I hear Windows has a few.
- de_watcher 6y ago
  Well, when you target Windows or Mac it's a mess anyway: when your project reaches certain level of complexity then you probably build Qt alongside with it. But I think that adding friction to the "download binaries from some site" is doing nothing more than alienating Windows developers. Qt just must add something like "Sign in with Google/Facebook with one click" because this audience cares about convenience.