common.mk: update from platform2

  - f4c7645ac292d099b28b157d4e2706ed3957974d common-mk: Use C++23. by Hidehiko Abe <hidehiko@chromium.org>

GitOrigin-RevId: f4c7645ac292d099b28b157d4e2706ed3957974d
Change-Id: I6d564592819e111aa3db49acfb74dcf10f2d10b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/audiotest/+/7420243
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common.mk

diff --git a/common.mk b/common.mk
index dfaa8ca..031a6f0 100644
--- a/common.mk
+++ b/common.mk
@@ -327,7 +327,7 @@
   -Wint-in-bool-context -Wfree-nonheap-object \
   -Werror -Wformat=2 -fno-strict-aliasing  \
   $(SSP_CFLAGS) -O1
-CXXFLAGS += $(COMMON_CFLAGS) $(COMMON_CFLAGS-$(CXXDRIVER)) -std=gnu++20 \
+CXXFLAGS += $(COMMON_CFLAGS) $(COMMON_CFLAGS-$(CXXDRIVER)) -std=gnu++23 \
   -fvisibility-inlines-hidden
 CFLAGS += $(COMMON_CFLAGS) $(COMMON_CFLAGS-$(CDRIVER)) -std=gnu17
 # We undefine _FORTIFY_SOURCE because some distros enable it by default in