From 728d14879bfcc49e22f0d2a82664541968def1e9 Mon Sep 17 00:00:00 2001
From: Rangi <sylvie.oukaour+rangi42@gmail.com>
Date: Wed, 20 May 2026 17:09:23 -0400
Subject: [PATCH] Consistently use `-std=c++2a`, not `-std=c++20`

Commit 63a911e657f62ddb49148f9f6e33c77d5eebdbac switched
to `-std=c++20` since at the time we required GCC 10 or higher.

Commit d5ce5329ea3ac8255d1cc1fa30c260bc0d534b77 partially reverted
to `-std=c++2a` since we once again support GCC 9, which did not
yet handle `std=c++20`.
---
 Makefile          | 2 +-
 compile_flags.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index b997dbfd..ff8dcf6d 100644
--- a/Makefile
+++ b/Makefile
@@ -257,7 +257,7 @@ tidy: src/asm/parser.hpp src/link/script.hpp
 iwyu:
 	$Qenv ${MAKE} \
 		CXX="include-what-you-use" \
-		REALCXXFLAGS="-std=c++20 -I include"
+		REALCXXFLAGS="-std=c++2a -I include"
 
 # Target used in development to conveniently invoke RGBDS binaries with Wine.
 wine-shim:
diff --git a/compile_flags.txt b/compile_flags.txt
index 6b8032ce..4cdeefd4 100644
--- a/compile_flags.txt
+++ b/compile_flags.txt
@@ -1,4 +1,4 @@
--std=c++20
+-std=c++2a
 -I
 include
 -fno-exceptions