[glib/glib-2-72: 4/4] Merge branch 'wip/pwithnall/backport-2578-clang-cxx-glib-2-72' into 'glib-2-72'

[Sebastian Dröge <sdroege src gnome org>]

commit d30a7260690956297b8b6384fda6424b3f9eeb21
Merge: 817fc993c7 45da15a50c
Author: Sebastian Dröge <slomo coaxion net>
Date:   Wed Apr 6 13:29:21 2022 +0000

    Merge branch 'wip/pwithnall/backport-2578-clang-cxx-glib-2-72' into 'glib-2-72'
    
    Backport !2578 “gatomic: Add a C++ variant of g_atomic_int_compare_and_exchange()” to glib-2-72
    
    See merge request GNOME/glib!2593

 glib/gatomic.h     | 12 ++++++++++++
 glib/tests/cxx.cpp | 38 +++++++++++++++++++++++++++++++++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)
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