C++ is evolving faster than C, so it's useful to enable new standards,
especially for standard library.
Update to most recent standard available in our build environments.

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index d50f9b502f3..53ffac02da5 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('qemu', ['c'], meson_version: '>=1.5.0',
-        default_options: ['warning_level=1', 'c_std=gnu11', 'cpp_std=gnu++11', 'b_colorout=auto',
+        default_options: ['warning_level=1', 'c_std=gnu11', 'cpp_std=gnu++23', 'b_colorout=auto',
                           'b_staticpic=false', 'stdsplit=false', 'optimization=2', 'b_pie=true',
                           'rust_std=2021', 'build.rust_std=2021'],
         version: files('VERSION'))
-- 
2.47.3