[gtkmm/gtkmm-3-24: 5/5] Merge branch 'meson-msvc-warnings-3-24' into 'gtkmm-3-24'

[Chun-wei Fan <fanchunwei src gnome org>]

commit 55c014b41285a66e5a962c79850549d0d8893711
Merge: bade7e9e ca657b6d
Author: Chun-wei Fan <fanc999 yahoo com tw>
Date:   Tue May 24 07:09:38 2022 +0000

    Merge branch 'meson-msvc-warnings-3-24' into 'gtkmm-3-24'
    
    Meson: Re-structure warnings-related compiler flags for Visual Studio (gtkmm-3-24 branch)
    
    See merge request GNOME/gtkmm!69

 MSVC_NMake/gendef/meson.build |  7 ++++---
 meson.build                   | 27 ++++++++++++++++++++-------
 2 files changed, 24 insertions(+), 10 deletions(-)
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