commit c18e5fd7d6c85d4755f1a70d97336d07b2add510
author Stephan Bergmann <sbergman@redhat.com> Fri Mar 12 14:24:33 2021 +0100
committer Stephan Bergmann <sbergman@redhat.com> Mon Mar 15 10:02:31 2021 +0100
tree a4933d148f183bca20f4a48cc8a32c18de2ce928
parent 5d83d14ef8e3a149f2dbcddc18a70edda021fbfe

GCC trunk already calls it C++23

...since
<https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=78739c2df788ee5c868d998a6333d453317d8711>
"c++: Add support for -std=c++23"

Change-Id: I28e345b4130f04eb37a1acb736a4ccbf2f577451
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/112392
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

configure.ac

diff --git a/configure.ac b/configure.ac
index 90b0cf0..fece7f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7055,7 +7055,7 @@ if test "$COM" = MSC -a "$COM_IS_CLANG" != TRUE; then
elif test "$GCC" = "yes" -o "$COM_IS_CLANG" = TRUE; then
    my_flags='-std=c++17 -std=c++1z'
    if test "$with_latest_c__" = yes; then
        my_flags="-std=c++2b -std=c++20 -std=c++2a $my_flags"
        my_flags="-std=c++23 -std=c++2b -std=c++20 -std=c++2a $my_flags"
    fi
    for flag in $my_flags; do
        if test "$COM" = MSC; then