Bug#992246: gxtuner FTBFS with glib 2.68.3

[Adrian Bunk <bunk@debian.org>]

Source: gxtuner
Version: 3.0-2
Severity: serious
Tags: ftbfs bookworm sid

https://buildd.debian.org/status/package.php?p=gxtuner&suite=sid

...
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from /usr/include/glib-2.0/gobject/gbinding.h:28,
                 from /usr/include/glib-2.0/glib-object.h:22,
                 from ./gxtuner.h:33,
                 from gxtuner.cpp:24:
/usr/include/c++/10/type_traits:56:3: error: template with C linkage
   56 |   template<typename _Tp, _Tp __v>
      |   ^~~~~~~~
In file included from gxtuner.cpp:24:
./gxtuner.h:30:1: note: ‘extern "C"’ linkage started here
   30 | extern "C" {
      | ^~~~~~~~~~
...