Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Do we need to include license notice for all 3rd party libraries used by Qt
Qt 6.11 is out! See what's new in the release blog

Do we need to include license notice for all 3rd party libraries used by Qt

Scheduled Pinned Locked Moved General and Desktop
3 Posts 1 Posters 1.6k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    M Offline
    marcus.fr
    wrote on last edited by
    #1

    Hi

    I use Qt as dynamically linked library and I plan to use it with LGPL license in a propriety software. Qt toolkit uses other libraries such as OpenGL, ANGLE, Libjpeg, Webkit, to name a few. Even the function QDate::weekNumber() has license notice by the University of California, Berkeley (see "here":http://qt-project.org/doc/qt-5.0/qtcore/qdate.html#weekNumber). Many of the 3rd party libraries are part of the core Qt modules.

    Normally we need to include the license notice of the 3rd party programs/libraries we use in our software. However, I'm not sure whether in my notice about licenses used, I need to include the license notice about using Qt toolkit library only, or I have to include a separate notice about each and every 3rd party library or piece of code used by Qt?

    Another confusion is that some contributions to Qt like those by KDE are licensed with GPL only (not LGPL). How do people use Qt library with LGPL license in this kind of context?

    Thank you!

    1 Reply Last reply
    0
    • M Offline
      M Offline
      marcus.fr
      wrote on last edited by
      #2

      Sorry to disturb with this again, but is there anyone that can give some advice on this? Thanks.

      1 Reply Last reply
      0
      • M Offline
        M Offline
        marcus.fr
        wrote on last edited by
        #3

        I have some progress on this, for those interested have a look at "http://qt-project.org/doc/qt-5.0/qtdoc/licenses.html":http://qt-project.org/doc/qt-5.0/qtdoc/licenses.html and "http://qt-project.org/doc/qt-5.0/qtdoc/3rdparty.html":http://qt-project.org/doc/qt-5.0/qtdoc/3rdparty.html

        1 Reply Last reply
        0

        • Login

        • Login or register to search.
        • First post
          Last post
        0
        • Categories
        • Recent
        • Tags
        • Popular
        • Users
        • Groups
        • Search
        • Get Qt Extensions
        • Unsolved