Dear Maintainer,

The atkversion.h header shipped in libatk1.0-dev is missing
G_BEGIN_DECLS/G_END_DECLS, causing link failures when the header is
included from C++ code.

The version functions declared in atkversion.h (atk_get_major_version,
atk_get_minor_version, atk_get_micro_version, atk_get_binary_age,
atk_get_interface_age) lack C linkage declarations. When atkversion.h
is included from a C++ translation unit, the compiler generates mangled
C++ symbols for these functions, which do not match the C exports in
libatk-1.0.so. This results in linker errors such as:

  undefined reference to `atk_get_major_version()'

This was fixed upstream in
https://gitlab.gnome.org/GNOME/at-spi2-core/-/merge_requests/219
(merged 2025-12-09) and is available starting from upstream version
2.59.0. The fix is already included in trixie-backports
(2.61.1-1~bpo13+1) but not in the current trixie stable.

The attached patch adds G_BEGIN_DECLS after the #include <glib.h> and
G_END_DECLS before the final #endif in atk/atkversion.h.in. This is the
same 2-line fix as the upstream merge request.

Could this be considered for a stable update to trixie?

Regards,
Valentin Haudiquet

We believe that the bug you reported is fixed in the latest version of
at-spi2-core, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1145539@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Samuel Thibault <sthibault@debian.org> (supplier of updated at-spi2-core package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Tue, 25 Aug 2026 19:52:58 +0200
Source: at-spi2-core
Architecture: source
Version: 2.56.2-1+deb13u2
Distribution: trixie
Urgency: medium
Maintainer: Debian Accessibility Team <pkg-a11y-devel@alioth-lists.debian.net>
Changed-By: Samuel Thibault <sthibault@debian.org>
Closes: 1145539
Changes:
 at-spi2-core (2.56.2-1+deb13u2) trixie; urgency=medium
 .
   [ Valentin Haudiquet ]
   * patches/debian-atkversion-c-linkage.patch: Fix atkversion.h header for C++
     (Closes: #1145539)
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