[PATCH experiment 11/16] bump to C++20

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure   | 4 ++--
 meson.build | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 886000346a..091710ec03 100755
--- a/configure
+++ b/configure
@@ -157,8 +157,8 @@ update_cxxflags() {
     # Set QEMU_CXXFLAGS from QEMU_CFLAGS by filtering out those
     # options which some versions of GCC's C++ compiler complain about
     # because they only make sense for C programs.
-    QEMU_CXXFLAGS="-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS"
-    CONFIGURE_CXXFLAGS=$(echo "$CONFIGURE_CFLAGS" | sed s/-std=gnu11/-std=gnu++11/)
+    QEMU_CXXFLAGS="-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -fcoroutines"
+    CONFIGURE_CXXFLAGS=$(echo "$CONFIGURE_CFLAGS" | sed s/-std=gnu11/-std=gnu++20/)
     for arg in $QEMU_CFLAGS; do
         case $arg in
             -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\
diff --git a/meson.build b/meson.build
index 2d6601467f..810ebb0865 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('qemu', ['c'], meson_version: '>=0.59.3',
-        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++20', 'b_colorout=auto',
                           'b_staticpic=false', 'stdsplit=false'],
         version: files('VERSION'))
 
-- 
2.35.1