General Information

This is GTK+ version 3.22.11. GTK+ is a multi-platform toolkit for
creating graphical user interfaces. Offering a complete set of widgets,
GTK+ is suitable for projects ranging from small one-off projects to
complete application suites.

GTK+ is free software and part of the GNU Project. However, the
licensing terms for GTK+, the GNU LGPL, allow it to be used by all
developers, including those developing proprietary software, without any
license fees or royalties.

The official download locations are:

The official web site is:

Information about mailing lists can be found at


See the file 'INSTALL'

How to report bugs

Bugs should be reported to the GNOME bug tracking system.
(, product glib.) You will need
to create an account for yourself.

In the bug report please include:

* Information about your system. For instance:

- What operating system and version
- For Linux, what version of the C library

And anything else you think is relevant.

* How to reproduce the bug.

If you can reproduce it with one of the test programs that are built
in the tests/ subdirectory, that will be most convenient. Otherwise,
please include a short test program that exhibits the behavior.
As a last resort, you can also provide a pointer to a larger piece
of software that can be downloaded.

* If the bug was a crash, the exact text that was printed out
when the crash occurred.

* Further information such as stack traces may be useful, but
is not necessary.


Patches should also be submitted to If the
patch fixes an existing bug, add the patch as an attachment
to that bug report.

Otherwise, enter a new bug report that describes the patch,
and attach the patch to that bug report.

Patches should be in unified diff form. (The -up option to GNU diff)
Even better are git-formatted patches. (Use git format-patch)

Release notes

Release notes for releases of GTK+ 3.x are part of the migration
guide in the GTK+ documentation. See