[glibmm: 7/7] Merge branch 'std-string-msvc-fixes' into 'master'

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

commit 19f08ffaf2c7245c240013be36b2f44f87582d6f
Merge: 9685f6fc eabcc013
Author: Chun-wei Fan <fanc999 yahoo com tw>
Date:   Fri May 14 18:47:09 2021 +0000

    Merge branch 'std-string-msvc-fixes' into 'master'
    
    Export classes selectively (fix issue #90)
    
    Closes #90
    
    See merge request GNOME/glibmm!51

 MSVC_NMake/config-msvc.mak      |   3 +-
 gio/giomm/socketsource.h        |  14 +-
 gio/src/fileattributeinfo.hg    |  20 +--
 gio/src/socket.hg               |   2 +-
 glib/glibmm/error.h             |  38 ++---
 glib/glibmm/main.h              | 128 ++++++++--------
 glib/glibmm/ustring.h           | 330 ++++++++++++++++++++--------------------
 glib/glibmm/variantdbusstring.h |   4 +-
 meson.build                     |   2 +-
 tools/m4/gerror.m4              |  10 +-
 10 files changed, 275 insertions(+), 276 deletions(-)
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